Cases

ATNJ Mobile Signal Repeater.pdf   Time: Dec.28 2022 Address: Tomorrow club, Jiangmen City, Guangdong Province Requirements: Calling and data signal coverage of all networks     Tomorrow Club is a newly-decorated bar. The bar is luxuriously decorated and the exterior walls are decorated with steel plates, making the mobile phone signals inside the bar, whether it is China Mobile, China Unicom, or China Telecom communications, the call and Internet signals are very poor, even it’s a very hard to send or receive message for wechat. The renovation of the bar is completed and the opening is imminent. It is imminent to solve the problem of the three network mobile phone signal inside the bar. Because the interior area of the entire bar lobby is about 500 square meters, 8-band equipment is used for customers, and two ceiling antennas are promoted as a lobby coverage solution. The advantage of using this solution is: the China Mobile low-frequency call GSM900 and high frequency call DCS1800, China Telecom call CDMA800, and China Unicom 3G call WCDMA2100 are amplified and covered to effectively solve the needs and problems of three-network calls.   At the same time, the 4G Internet access signals FDD-LTE1800M of China Unicom and China Telecom, as well as China mobile 4G Internet frequency bands D, E, and F were automatically locked, which were effectively amplified to solve the needs and problems of these three networks.   Besides, the biggest advantage of this 8-band all-network booster is that no matter when the operator adjusts these base stations, it will not affect the user ’s three-network call and three-network data experience, because all existing frequency bands are all covered.   The designed scheme is shown in the following figure,   Use two LPDA antennas to receive wireless. One is to receive and transmit CDMA800M, GSM900M, DCS1800M and WCDMA2100, and the other antenna is to receive and transmit FDD-LTE 1800M and TDD-LTE1900M / TDD-LTE2300M / TDD-LTE2600M (the three-way signal D, E, and F bands for mobile 4G are automatically selected by the device).   Wiring Construction: After the completion of the construction, test that the signal strengths of the first channel are shown below: The first channel has a full output power as around +17dbm.   The signal strengths of the second channel are shown below: 4G FDD-LTE1800M of China Unicom and Telecom has a full output power in second channel: +17dBm.   The mobile 4G channel automatically locks the F-band TDD-LTE1900M with the best signal strength + 17dBm full power output.   In the normal working state of each frequency band of the equipment, the signal strength test of each frequency band in the hall is as follows:   The signal strength of the three major operators, whether it is calling signal or data signal, has reached full bar. In addition, when a lot of people test the calling and data signal at the same time in the bar, the signal strength keeps stable to meet the demands.   Dot test of China Mobile and China Unicom signal was performed, it shows the signal coverage and signal strength are balanced. As shown below, Summary: In case of using 8 bands full-network booster, there is no need to consider the working frequency, because all frequency of signal operators are included. Therefore, when design the construction plan, we only need to consider the coverage area, range and required antenna and the length of cables.   It is best to install two LPDA outdoor antennas in an upside down position, pointing to different directions, so that the six sets of values on the screen of the device all work to the maximum output value.

ATNJ Mobile Signal Repeater.pdf Time: Feb.01, 2023 Address: KFC Restaurant ( CaiDe Town) Requirements: 4G signal coverage of China Unicom and China Telecom   KFC Restaurant (CaiDe Town) is located on the first floor of Caide Town, CaiTian Road, Futian District, Shenzhen. The location of a KFC restaurant is usually in the center of various business districts, where are usually covered by great signal of the three major signal operators.   After the site survey, we found the signal of China Mobile is very good, and no need to consider China Mobile signal. However, 4G signal of China Unicom and China Telecom are weak on the checkout counter, kitchen, corner, and office. The reason is that China Mobile had signal coverage inside of the building. Therefore, people could only receive China Unicom and China Telecom signal from outdoor base station. What’s more, as there is a building in the front of KFC restaurant, it’s normal to have weak signal of China Unicom and China Telecom in KFC restaurant.   To solved the mentioned weak signal problem, we only need to aim at the exact signal frequencies and make signal coverage at the following positions.     Signal survey result as follows,   According to the above signal data, we could tell that China Mobile had a great signal distribution inside, but China Unicom and China Telecom not. Therefore, we need to transmit the outdoor signal of China Unicom and China Telecom to indoor, then amplify it.   Scheme Design According to the signal demands and the site survey, we use a high-power repeater with six indoor antenna to amplify signal in the checkout counter, kitchen, corner, and office. Topology picture as follows,   Wiring and construction Considering the clients flows and business time of KFC restaurant, the construction time was arranged to avoid the rush hour, and the whole construction is noiseless and dust free. Besides, the construction of kitchen was arranged after 21:30.   Except the indoor antenna in lobby, all the other antennas are installed into the ceiling without any exposure. Also, the outdoor antenna was installed below of the signboard, where won’t be look strangely.   Effect Test After signals are amplified, the signal strength is tested as follows,   Except no change on China Mobile signal, there are a great improvement of China Unicom and China Telecom signal. Especially the delivery clerks could have a better experience to receive takeout order and arrange delivery. The signal coverage offers a better signal experience for client and KFC staff.   Summary As KFC restaurant is usually covered by great signal of the three major signal operators, the signal problems are more likely that some frequencies are not covered. Therefore, an accurate site survey are necessary, then we could use a suitable repeater with correct frequency to amplify the specific signal to meet the demands of signal coverage.   Besides, as it’s a KFC restaurant, we have to consider the construction time when it won’t affect the business with easiest construction method.

Time: Jul.27, 2019 Address: Runyuwan Club, Bagua Second Road, Futian District, Shenzhen City Requirements: Calling and Data signal amplification of all-networks.   Runyuwan Club is located in Bagua Second Road, Futian District, Shenzhen. The shop is close to the street and McDonalds. As a prosperous and dense business center, it is reasonable to say that the three major operators will surely optimize the corresponding signal coverage networks. No matter the density of the base station or the signal strength, it must be a high-quality area.     Why is there a need for all the signals of Netcom (three-network call + three-network network) in such a good location? The clubhouse is located on the second floor of the shop, in the interior area of the corridor.   At the front desk of the clubhouse on the second floor, people would feel a complete lack of signals. Whether it is China Mobile or China Unicom, the call and Internet signals are very weak, let alone scan CR code to pay. The front desk attendants are used to being out of contact when they arrive at the job.   Therefore, the club and customers are in an unquestionable urgent need of three network 4G and three network call signals, no matter to pay by scanning CR code at front desk or to contact in each room in the clubhouse.   There is no 4G network in the room, and customers are unwilling to go to the club for leisure, this is even more terrible.   From the layout we could see the area of the club is around 400sqm, and the rooms on the upper side are facing the street, where has a good signal strength. The weak signal area is at the front desk area and the lower side area from the layout.   1 .Scheme Design   Band selection of three network calls and three network 4G Internet enhanced signal in Shenzhen City:   The frequency Combo uses common Calling frequency of China mobile GSM 900Mhz, China Telecom CDMA 800Mhz, China Unicom WCDMA 2100MHz, and 4G FDD-LTE 1800MHz of China Unicom and Telecom. Besides, we adopt FDD type 4G signal but not TDD for China Mobile, because as 5G is coming, and China Mobile is re-design 1800MHz, FDD is more efficient and effective.   2．Wiring Construction     3．Testing After plugging in, the booster work stably and all frequency could have a full output power.   800MHz: 65dB Working Gain, +17dBm full output power 900MHz: 61dB Working Gain, +17dBm full output power   1800MHz: 59dB Working Gain, +18dBm full output power 2100MHz: 60dB Working Gain, +17dBm full output power   These four frequencies are working in best condition. China Mobile Calling signal is DCS1800MHz, signal strength is full bar -60dBm with a fluent and clear calling quality.   China Mobile 4G data signal is FDD-LTE 1800MHz, signal strength is full bar -72 dBm. Watching real-time videos online is very smooth and high speed.   China Unicom Calling signal is WCDMA2100MHz, signal strength is full bar -73dBm with a fluent and clear calling quality.   China Unicom 4G data signal is FDD-LTE 2100MHz, signal strength is full bar -74dBm with high-speed Internet surfing.   China Telecom Calling signal is CDMA800MHz, signal strength is full bar -60dBm with a fluent and clear calling quality.   China Telecom 4G data signal is FDD-LTE 1800MHz, signal strength is full bar -87dBm with high-speed Internet surfing.   Dot plot in clubhouse, signal strength is excellent for China Mobile 4G 1800MHz and China Unicom 4G 2100MHz. 4．Summary As a street-facing shop, with the partition of rooms and decoration, it still leads to a large number of signal blind spots. Especially clients need to stay long at the front desk to make the payment with scanning CR code. Fluent and high-speed calling and data signal are essential decoration facilities for merchants. Although WIFI can make up for some of the functional requirements, in the current high 4G network penetration rate, 4G network is a necessary signal environment at anytime, anywhere.   Small-area merchants can use quad-band booster to achieve the functions of three network calls and three-network networks, which is an economical and practical solution for the civilian market. ATNJ Mobile Signal Repeater.pdf

ATNJ Mobile Signal Repeater.pdf Time: Jun.02 2019 Address: Jiangyou Financial Center, Jiangyou City, Sichuan Province Requests: mobile signal coverage in 8 high-floor elevators and 3 low-floor elevators I new-built building area.   Jiangyou Financial Center is located in Jiangyou City, Mianyang City, Sichuan Province with beautiful scenery and pleasant climate. Jiangyou City has a permanent population of about 500,000, which belongs to the construction and scale of a county-level city. As with the development momentum of county-level cities in other cities in China, new buildings and high- rise buildings are lining up. Infrastructure establishment and development are growing rapidly, and there is also a strong demand for communication equipment construction and network coverage. The Financial Center is a new building that is about to live. The building includes 4 high-floor residential buildings with 28 floors and above(eight high-floor elevators) , 1 low-floor building with 8 floors, and a 5-floor street shop. The entire building is in the final stage to hand over. The entire project is in the final sprint construction phase of greening, security monitoring, communication equipment and fire protection facilities. Because the signal providers can’t meet the demands of signal coverage, and the project acceptance stage is imminent. The project team needs to cover the signal blind area with calling signal to meet the demands of project acceptance and delivery.   Therefore, we adopt our One-Take-One system to solve the eight 30-floor elevators signal problem (28 ground floors, and 2 basement floors). As for three low-floor elevators (2 8-floor elevators and 1 5-floor elevators ), single-device system is adopted. High-Floor elevators One-Take-One system: even if the building is high to 30 floors (the length of elevator is over 100 meters), the remote unit has dynamic AGC mode to meet the demands of signal coverage in elevator box, in 28-floor or -2 floor.   Low-floor elevators: as the length of the elevator shaft is fewer than 30 meters, an high gain elevator antenna could meet the demands of signal cover in such a space, and it’s easy to penetrate signal into the elevators box.   Device: GSM900 + 1800Mhz (front 45Mhz) dual band booster. This frequency combo matches the low-frequency calling and high-frequency calling signal of China Mobile, and no matter how signal provider upgrades their base station, it won’t affect the clients’ use. Besides, the 1800Mhz (front 45Mhz) is also compatible to the upgrading 4G data signal of China Mobile, it means our solutions would also offer the coverage of 4G data signal (which is not included in the demands of client.), and clients would have a great 4G VOLTE calling experience.     Installation and Construction There are two high-floor elevators in one building, and they share one equipment room. The outdoor LPDA antenna could be installed on the outer wall of elevator equipment room, and face to outer open surroundings, then the antenna could receive good signal sources of GSM900Mhz and 1800Mhz. Device installation in equipment room: boosters are mounted on the wall, and the cable could get through the pipes or cable tray of equipment room to wire. Elevator antenna installation: the wiring must meet the installation requirements of the the elevator equipment engineering company. Device Installation on the elevators box and the wiring must meet the installation requirements of the the elevator equipment engineering company and the cable must get through the pipes or cable tray of equipment room to wire. Device debugging To ensure the best signal coverage, please adjust the output power of two main units (boosters in equipment room) to max 17dbm, adjust the gain as high as possible (no lower than 50dBm), decrease the gain compression and output compression . On screen, S1 is GSM900Mhz, and S2 is 1800MHz. In the pictures above, the output power of 900MHz and 1800Mhz are both full 17dBm, and gain are 55dBm and 63dBm, both of them won’t have much gain compression. The working status and output power have a best performance.   After debugging, walk around in elevator box to test the signal. When mobile is standby, signal strength is -52dBm and -63dBm, full bar. When the elevator is working, have a calling signal test: signal strength is between -72 to - 79dBm, full bar signal, and fluent calling experience. Just as the situation is considered in the was considered at the beginning of the solution, 4G data signal also would be strengthened in elevator box. Signal strength is -88dbm, and network speed is 16M/S for DL, 4M/S for UL, which could totally meet the 4G network demands in elevator box. Project summary For a solution with single signal provide-China Mobile, considering the long-term use, GSM900MHz/1800MHz (front 45MHz) are best frequency combo to amplify calling signal. If client’s demands are calling + data, we have to consider more factors, like the upgrade / adjustment of signal provider, and multi-frequency combo are best. The frequency combo of GSM900+DCS1800+TDD1900/TDD2300/TDD2600 (self-adaptive) is requested to meet the current and future needs of signal use.   One-Take-One syytem for high-floor elevator, it’s easy to debug, and install, which is the best choice for a elevator solution.

ATNJ Mobile Signal Repeater.pdf Date: Mar.13 2019 Address: Laoyu Village Building, N0.13 PingJi Avenue, LongGang District, ShenZhen City.   1．The environmental survey   1、There are two elevators on the building, located in City area in Shenzhen, good signal strength outdoors. 2、Pictures of the building：   3、Surrounding on the roof： no any base station in the sight. 4、Signal Strength on the Roof. The calling signal frequency of China Mobile is GSM900Mhz, excellent signal strength with -51dB.   The calling signal frequency of China Mobile is WCDMA2100Mhz, excellent signal strength with -57dB.   China Telecom has installed their signal systems in the building, so we don’t need to deal with the Telecom signal to avoid any signal conflict.   5、Survey of elevator and its signal Elevator Surrounding：   Check inside the elevator, both of China Unicom and China Mobile is out of service.   2．Solution   Based on the above information: 1, Good Mobile & Unicom signal strength on the roof. 2, No any signal inside the elevator from Mobile & Unicom 3, 25-floor height One-Take-One Elevator System would be adopted to cover elevator shaft and the elevator box to keep the stable calling signal when elevator is working. The Schematic Diagram as follows, Device: 900/2100Mhz One-Take-One Elevator Dual band System.     3． Construction Wiring 4．Efficiency After the test, the RU’s signal outputs of 900Mhz & 2100Mhz are +17dbm, which could ensure the signal coverage of the elevator.   Elevator 2, the RU’s 900Mhz has a full output power +17db, and output power of 2100Mhz is a litter weaker : only +08 db. 5．Testing in the elevator box. When elevator is working from 1st floor to 25th floor, the signals both of Mobile and Unicom are full bar with fluent calling and clear voice.   In the low floors, the Mobile signal strength could reach -43db with fluent calling and clear voice. In the low floors, the Unicom signal strength could reach -55db, with fluent calling and clear voice.   6．Conclusion Before offering solution and starting to construct, the below information should be known in advance, 1, the frequency requested 2, the signal strength needed to achieve. 3, the floors of the building.   Based on the information offered, when the booster has full output power, we could use standard kit of elevator shaft system to solve the signal coverage problem for within 10 floors. To solve the signal coverage problem more than 10 floors but within 30 floors, One Take-One Elevator System could be adopted.        

Time: Nov.15 to Nov.20, 2019 Address: FM002 Youth Hostel, Shenzhen City Requirements: Calling and Data signal amplification of all-networks.       FM002 Youth Hostel and FM148 Youth Hostel belong to the same chain of condominiums company. It’s located in Heshuikou Village, Matian Street, Guangming New District, Shenzhen, and are typical houses in a urban village.   The signal strength on the streets is very good, but because the distance between the building and the building is too close, the signal cannot penetrate well indoors. The phone is offline in the corridors and rooms from 1st floor to 5th floor.     Narrow alleys, close houses, and internally sealed decoration structures, no matter how good the signal status outside the street, enters the interior, it has become a state of offline. In addition to the top 6th floor, which can barely have a mobile phone signal, the 1-5th floor has become a disconnected state from the world.   1． Signal Source Survey   The signal on the top of the building is actually very good, and the 6th floor of the youth hostel does not need to be covered by signals, but 1st floor to 5th floor. The roof has a wide view, and the base station antenna of the operator can be seen not far from the roof.     The signal strength of the three major operators are as follows:     From the above data, it can be seen that the signal source of the three major operators on the roof of the youth hostel are all very good. Taking the source on the top of the building and covering the signal room separately, you can solve the signals problem on the 1-5th floor.   2．Scheme Plan   2.1 Device frequency combo as below China Mobile calling + internet: 900Mhz + 2600Mhz China Unicom calling + internet: 2100Mhz + 1800Mhz China Telecom calling + internet: 800Mhz + 1800Mhz Therefore, at least a 5-band booster would be selected to meet the demands: 800+900+1800+2100+2600Mhz   2.2 Indoor antenna distribution Based on client’s requirements and the layout, 4 indoor antennas would be distributed in 1st floor, and 7 indoor antennas on each of 2nd to 5th floor. 32 antennas in total, evenly distributed in the aisle.   Considering that the antenna signal in the aisle needs to cover the room through the wall , the signal strength at the end of each antenna is not fewer than + 5dB. Therefore, two high-power booster with output 27dbm, gain 80dbi would be used. Topology pictures are as follows,     The wiring construction on the floor is shown below：   3．Construction   Due to the preliminary survey and communication of the entire project in place, the project implementation was very smooth and rapid.   4．Project Acceptance   The five frequencies could reach full output power. After plugging in , the entire apartment has achieved full Netcom mobile phone signal coverage, and each room and corner can achieve a good Internet and call experience.   From the output value on the screen, the output power of five frequencies all reach a full +27dbm, which could entirely meet the demands.   Exact test on the signal strength and network speed, Both the strength of the call signal and the speed of the Internet can achieve high-quality results.   ATNJ Mobile Signal Repeater.pdf   5．Summary   As an apartment-type building mobile phone signal coverage, five-frequency full Netcom high-power equipment is undoubtedly the best equipment selection solution. Its advantages are: 1: Complete frequencies. FDD-1800Mhz is not used to solve all operators’ 4G signal, but to use exact frequency to avoid the situation that some phone could receive 4G signal but some can’t. China Mobile 4G must use the TDD standard frequency band to ensure the compatibility of various base-band chips of Apple mobile phones and Android mobile phones, so as to meet the real needs of customers for 4G signals; 2. High output power. The 27dBm output is undoubtedly better to meet more indoor antenna distribution needs. A single device can drive the output requirements of 12-20 indoor antennas (depending on the field environment); 3. 80dbi high-gain. Even when the outdoor environment signal and the source signal are not good, the output signal can be driven to the optimal output state of + 27dBm, maintaining a stable and high speed call Internet signal.          

Date：Apr.12th 2019 Address：ZhengZhang Building, ShenYun Interchange, ShaHe Construction Village, LongZhu Avenue, NanShan District, ShenZhen City. Requests：China Mobile and Chine Unicom communication signal coverage of the negative layer of ZhengZhang Building   1．The Surrounding Survey   1. ZhengZhang Building is located in NanShan District of Shenzhen City, which has great base station coverage and high quality signal strength. 2. There is a Telecom base station on the top of the building, so the signal strength of Telecom on the negative ground floor is good enough. The base stations of China Mobile and China Unicom are hundreds of meters away from the building, which could be used as signal sources. 3. , On the roof, we checked the communication signal frequency of China Mobile is DCS1800MHZ, signal strength -63db, and communication signal frequency of China Unicom is WCDMA2100MHZ, signal stregnth -57db. Signal strength both of them are quite good.   4. The environmental survey of negative layer. It’s the place to dry-cleaning and store the clothes. There are many workers but no a mobile signal to guarantee the communication. In some compartments, China mobile signal frequency can’t be detected; try to call 10086 (China Mobile’s service hotline), but no answer. Out of service for China Unicom.   2．Solution   No any layout of the negative ground floor. According to the estimated area of the site is about 800 square meters, and two aisles around the corner. We manually drew the layout and offer solution of antennas’ location as belows. According to the layout, we have a complete solution as below. As the negative ground floor is empty, the coverage of each antenna could be guaranteed. Due to the length of the cable, FB-12 cables would be adopted to ensure its perfect performance of each antenna.     High power dual band booster DCS1800+WCDMA2100 would be used, its full output power is +23dbm.   3． Construction of cables.   4．Efficiency   The output power of China Mobile (1800Mhz) & China Unicom (2100Mhz) reach +25dbm and +24dbm, which performs to the full output power perfectly. Refer to below pictures.   Within the three scopes with 5 ceiling antennas, the signal strength is over -85dbm, the calling quality and speed achieves great effectiveness. Below shows the random test of signal strength: China Mobile -63dbm, China Unicom -67dbm, both of them are full bar. ATNJ Mobile Signal Repeater.pdf 5．Conclusion   The case- Signal Coverage Solution of ZhengZhang building negative ground floor is very typical with negative ground floor Characteristics: nice signal strength on the roof, no any signal in the negative ground floor, too long wiring construction, few suitable local of antennas. Adopting high power dual band booster and 1/2 RF cables could achieve great output effect and application experience.

ATNJ Mobile Signal Repeater.pdf Time: Sept.15 2019- Oct.10 2019 Address: Xinghe Dandi area, Huizhou City, Guangdong Province Request: signal coverage for 70,000 sqm Parking Lot   The Xinghe Dandi area covers an area of 1.5 million sqm and the construction area is about 2.6 million sqm. This area is divided into 5 parts and 10 communities, and they are located in the west side of Yagongding Forest Park. This project is to provide signal coverage solution for two parking lots, one is 20,000 sqm in the North, and the other one is 50,000 in the South.     There is only a one-floor parking lot in the north area, which was divided into 3 areas (A, B ,C) with an area of around 20,000 sqm, 800 parking spaces. Signal could be tested at the entrance/exit of the parking lot, but no any signal in the parking lot. Therefore, providing mobile signal in the parking lot is the most urgent service.   There is also only one-floor parking lot in the south area, divided into 5 areas with over 2000 parking spaces. Besides, there are more residents in south area, so having a signal coverage is pressing.   The requests of this project is to cover all network of signal providers, it’s calling + 4G data of China Mobile, China Unicom, China Telecom.   Based on this request, our company (Shenzhen ATNJ Communication Technology Co Ltd) adopted our Powerful Ultra-wideband Distributed Antenna System (UDAS) as the bid proposal of this project.   Here we have a brief introduction of UDAS as follows,     1.1 UDAS Introduction UDAS: Powerful Ultra-wideband Distributed Antenna System, is also named as Pull far Distributed Antenna System. The features of PDAS is to use fiber optic cable to connect MU (Main Unit) and RU (Remote Unit), which could meet the demands of long-distant signal transmission (single band frequency transmission distance: 20-120kms, multi-band frequency transmission distance: 2-5kms)   UDAS can better solve the problem of signal attenuation during transmission, and is suitable for large area signal distribution system solutions; the double amplification enhancement of MU & RU is an effective guarantee to amplify weak signals, and it could ensure the full output power signal of each RU, so that the coverage area and the coverage effect are of high quality.   1.2 Device Introduction The equipped devices are high-power five band repeater, it supports frequencies as follows,   Due to the double amplification of MU and RU, the gain could reach 105dbm. The full output power of RU devices could reach 27dbm, and each RU could connect with 15 to 20 indoor antennas to cover 5000 to 10000 sqm.   1.3 Distribution Introduction There is a topology picture of a typical One-Take-Four system as follows. Based on the actual site needs, we could also use One-Take-Eight system and use flexible indoor antennas combo. The underground parking lot is an open and enclosed area, using antennas combo with ceiling antenna, LPDA antenna and panel antenna could meet the demands of indoor signal distribution system with lowest materials.   1.4 Solution Advantages ⑴ Solved the signal problems of China Mobile, Unicom, Telecom. It supports 2G+4G signal of Mobile:GSM900M, DCS1800M, FDD LTE1800M and TDD-LTE2600M, 2G+3G+4G signal of Unicom: GSM900M, DCS1800M, WCDMA2100M and FDD-LTE1800M, 2G+3G+4G signal of Telecom: CDMA800M and FDD-LTE1800M.   ⑵ Using fiber cable to transmit signal between MU and RU, it would decrease well the signal attenuation, and meet the demands of distant and big coverage,   ⑶ The gain is high to 105dbi, which makes up the weak signal sources issue.   ⑷ The full output power is high to 27dbm/1W, which could support 15 to 20 indoor antennas to cover 5000 to 10000 sqm.   2.1 Site Survey Except the analysis to the layout, we need to have accurate project information like: signal source, zoning, and cable tray. Signal frequency and strength could be tested as follows in out of South area and North area.   The signal frequency and strength could match and meet the demands of our repeater.   After the site survey to the cable tray and equipment room in parking lot, we collected the information of surrounding of parking lot, AMR demands of each equipment room, positions of Property management office, monitoring room, elevator room to design the exact wiring and topology pictures.   2.2 Solution Design Based on the above data, the solution designed as follows, Use One-Take-Three UDAS in North area with one MU and three RUs. Each RU covers each small area. And C is much opener and squarer, so there would be one channel from RU in C to cover the east side in A.   Use One-Take-Five UDAS in South area with one MU and five RUs. Each RU covers each small area including equipment room, property management office, monitoring room and elevator room.   With this solution with best-price repeater, easiest wiring and construction and the shortest construction time, we won the rely of our client, and succeeded in biding.   3. Project Construction There are three parts for construction: wiring construction, PDAS construction, device debugging. The timetable as follows,   The construction process is fully implemented in accordance with construction company’s construction standards. All the cables are installed into the cable tray, and the exposed cables are protected and beautified by bushings.   The previous cables wired by the property management office are all removed and replaced by UDAS. After a two-week construction, we finished the UDAS construction on two parking lots with 70,000sqm.   4. Signal Test   After plug in, the RU could have a full output power.     Verify the signal strength in some specified position of South/North area as follows, all are excellent signal.     5. Project summary   UDAS with five band device is the optimal solution for large-area, long-distance signal coverage. Whether it is parking lot, real estate, property, park lot, or even tunnel construction, by using our UDAS, people could achieve all network calling and data signal coverage with lowest price and easiest construction. Flexible combo of MU&RU with exact wiring and construction could meet all the signal coverage demands. XingHe DanDi is a typical case of PDAS, it has following features: 1. Demands of 2G calling + 4G data signal of all signal providers. 2. Big coverage. If use coaxial cables, it would be hard to wire and construct, and it’s high loss, and bad performance. 3. Easy construction, low-cost device, Low labor and maintenance costs.        

Time: Nov.15 to Nov.20, 2019 Address: FM002 Youth Hostel, Shenzhen City Requirements: Calling and Data signal amplification of all-networks.   FM002 Youth Hostel and FM148 Youth Hostel belong to the same chain of condominiums company. It’s located in Heshuikou Village, Matian Street, Guangming New District, Shenzhen, and are typical houses in a urban village. The signal strength on the streets is very good, but because the distance between the building and the building is too close, the signal cannot penetrate well indoors. The phone is offline in the corridors and rooms from 1st floor to 5th floor. Narrow alleys, close houses, and internally sealed decoration structures, no matter how good the signal status outside the street, enters the interior, it has become a state of offline. In addition to the top 6th floor, which can barely have a mobile phone signal, the 1-5th floor has become a disconnected state from the world. 1． Signal Source Survey The signal on the top of the building is actually very good, and the 6th floor of the youth hostel does not need to be covered by signals, but 1st floor to 5th floor. The roof has a wide view, and the base station antenna of the operator can be seen not far from the roof.   The signal strength of the three major operators are as follows:   From the above data, it can be seen that the signal source of the three major operators on the roof of the youth hostel are all very good. Taking the source on the top of the building and covering the signal room separately, you can solve the signals problem on the 1-5th floor.   2．Scheme Plan   2.1 Device frequency combo as below   China Mobile calling + Internet: 900MHz + 2600MHz   China Unicom calling + Internet: 2100MHz + 1800MHz   China Telecom calling + Internet: 800MHz + 1800MHz   Therefore, a 5-band booster would be selected to meet the demands: 800+900+1800+2100+2600MHz. 2.2 Indoor antenna distribution   Based on client’s requirements and the layout, 4 indoor antennas would be distributed in 1st floor, and 7 indoor antennas on each of 2nd to 5th floor. 32 antennas in total, evenly distributed in the aisle.   Considering that the antenna signal in the aisle needs to cover the room through the wall , the signal strength at the end of each antenna is not fewer than + 5dB. Therefore, two high-power booster with output 27dBm, gain 80dbi would be used. Topology pictures are as follows, The wiring construction on the floor is shown below, 3．Construction   Due to the preliminary survey and communication of the entire project in place, the projectimplementation was very smooth and rapid.   4．Project Acceptance   The five frequencies could reach full output power. After plugging in , the entire apartment has achieved full Netcom mobile phone signal coverage, and each room and corner can achieve a good Internet and call experience.     From the output value on the screen, the output power of five frequencies all reach a full +27dBm, which could entirely meet the demands.   Exact test on the signal strength and network speed, Both the strength of the call signal and the speed of the Internet can achieve high-quality results.   ATNJ Mobile Signal Repeater.pdf   5．Summary   As an apartment-type building mobile phone signal coverage, five-frequency full Netcom high-power equipment is undoubtedly the best equipment selection solution. Its advantages are,   1: Complete frequencies. FDD-1800MHz is not used to solve all operators’ 4G signal, but to use exact frequency to avoid the situation that some phone could receive 4G signal but some can’t. China Mobile 4G must use the TDD standard frequency band to ensure the compatibility of various base-band chips of Apple mobile phones and Android mobile phones, so as to meet the real needs of customers for 4G signals;   2. High output power. The 27dBm output is undoubtedly better to meet more indoor antenna distribution needs. A single device can drive the output requirements of 12-20 indoor antennas (depending on the field environment);   3. 80dBi high-gain. Even when the outdoor environment signal and the source signal are not good, theoutput signal can be driven to the optimal output state of + 27dBm, maintaining a stable and high speed call Internet signal.

ATNJ Mobile Signal Repeater.pdf Time: May.10 to May.11, 2019 Address: Investment Center Mansion,Pingshan District, Shenzhen City Requirements: AMR signal coverage (AMR: automatic meter reading) Investment Center Mansion is located in Pingshan Street, Shenzhen, and it’s close to be finished. Power equipment systems were installed on the negative second floor of the five buildings. Since the area is a newly developed building, signal operators' equipment and signals have not been well covered in the area, and there is no signal in the underground parking lot.     The five areas on the negative second floor are power equipment, and the meter reading communication uses China Mobile 4G communication modules, so we need to cover the mobile 4G signals in the five areas in the figure below.   1． Signal Survey   In the area of the first and second floors on the ground floor of the building, the mobile 4G signals detected are all in the 1900Mhz band. The signal RSRP strength is around -90, which can meet the acquisition strength of the source. 2．Device Scheme   1、Device Only mobile 4G is needed, and the 1900M band can meet the demand. Therefore, in this customer application scenario, a single mobile 4G F band is used, and the 1900M signal amplifier can be enhanced. This time, a high-power mobile 4G device is used, with a gain of 80dB and a power output of 27dBm.   2、Wiring Construction Because the power rooms of the five buildings are on the negative second floor, and the distance between each building is very far away, we use a device to transmit signal to each Therefore, a device is used under each building to push multiple ceiling antennas into several rooms for signal coverage. There are 2-4 power distribution rooms below each building, and the splitters and couplers used in the middle are slightly different. But regardless of the increase or decrease of 1-2 ceiling antennas, the measured output can meet the coverage needs.   3．Construction 50-12 cable is used as outdoor cable, which is introduced from the first and second-floor terraces to the negative second-floor power distribution room through the distribution room well. In the cable tray of the power distribution room, 50-3 feeders, power splitters and couplers are used to match the ceiling antenna of each room.   4．Testing   After the construction is completed, the mobile 4G signals of the five regional power distribution rooms have reached full grid, and the signal strength is high quality, between -60dB to -77dB. The working value of the equipment is also very good, and it is in the same range as the value calculated by the evaluation. Exact data tests were performed on 5 room areas, and the entire room was well covered, and the customer passed the acceptance test of the Electricity Bureau on May 13. Conclusion:   For AMR signal coverage in the underground parking lot, the exact frequency and the signal operator are required before the scheme. It is very easy to solve and achieve the effect by measuring the length and loss of the feeder line in the construction and scheme.        

Tunnel cell phone coverage enhancement report 一、Field description The tunnel section (1.4 km) has enhanced mobile coverage，The optical fiber wireless repeater station one tow two scheme is adopted.         The topology of the system scheme design is as follows:     Check the pipe gallery site and the actual situation of installation and implementation as follows:   There is no firewall or fire door in the middle of the 1.4km corridor from the north entrance of the tunnel to the south entrance of the tunnel, and the whole passage is very straight.     The outdoor antenna (flat plate antenna) faces south.     The MU repeater is located at the head of the north entrance pipe gallery, in the same position as the RU repeater 1. The RU repeater 2 is located at the tail of the 1.4 km pipe corridor.     The indoor distribution of the two RU repeaters is the same,There is a main feeder line from the two sections to the middle, about 70 meters apart，An indoor antenna is coupled to cover the signal in the middle of the channel. As shown in the picture below:         This image can be double-clicked to enlarge.     二、Adjust and test Both the MU and RU repeater 1 are connected to the indoor and outdoor cables, and the optical fiber and power cables are connected，The RU repeater 2 is not connected to optical fiber and is not powered.Therefore, you can only perform upper computer commissioning on the MU and RU repeater 1, and test the coverage signal.     三、Rectification instructions 1、The optical fiber between RU repeater 1 and RU repeater 2 must be connected through a black round tail connector (FC/UPC). 2、The power supply for RU repeater 2 must be installed properly. 3、Turn the outdoor antenna 90 degrees to face east, toward the base station.   The source signal transmitted directly from the base station can be obtained by this adjustment, and the working input signal and output signal of the equipment can be enhanced by more than 5dB.     4、Adjust the position of the RU repeater（Very important） At present, the two RU repeater are at both ends of the 1.4km pipe corridor, and the indoor feeder lines of each RU repeater are above 600 meters, according to the 50-12 coaxial cable loss parameters, the line loss of 600 meters reaches 60dBm (1000 power), and the line loss of 300 meters is 30dBm, equal to 1 watt.   Rectification method: The two RU repeaters are moved to the middle part of each indoor feeder line, and the two RU repeaters are moved to the middle part of the original antenna ANT5 and ANT6 in the equipment room. The output of the equipment adopts a cavity two-power splitter to output signals to the left and right sides respectively. Pay attention to the coupler marked yellow in the figure. The eight couplers need to change the original direction and switch the input and output ports.       Double click the image to enlarge it       Please see the chart below:     5、Coupler parameter adjustment Due to the situation of the construction ladder on the site, we only see 10DB coupler after ascending the bridge at the first antenna ATN1 position of the RU repeater 2, and the nearby host should use a coupler with a large value to ensure that the signal strength of each working port of the antenna distributed down is balanced, rather than the near strong and far weak situation. First out of the host is a cavity two-power divider, divided into two main lines, the main line from near to far each way of the 4 couplers should be used 20DB, 15DB, 10DB and 5DB, 4 couplers value from large to small use.  

Time: Apr.29, 2021 Location: JD QiXian Supermarket (WANKELI Shop) Requests: Calling signal and 4G data signal of whole China Netcom   JD QiXian Supermarket (WANKELI Shop) is located in the podium building and the basement 1 floor of "WANKELI-ZHEN" residential area, near the exit of Antuoshan metro station in Futian District, Shenzhen. As “WANKELI-ZHEN” is newly built, the signal coverage from signal operators is not arranged, but the opening time of supermarket (Apr.30) is imminent. According to the drawings and field surveys, it is found that there are two parts of JD QiXian Supermarket. One part is the distribution area in the ground floor with around 300sqm, and the other part is supermarket working , warehousing and office area in the basement 1st floor, with an area of 2300sqm.   Distribution area in the ground floor   After field surveys, we found that the distribution area on the ground floor is close to the street and has a small area without any partitions or obstructions. The signals of the three networks here are all very good. Therefore, we don’t need to have mobile signal coverage for the distribution area. However, because the supermarket is located in the center of basement 1st floor without any indoor signal distribution from signal operators, only very weak signal could be received in some specific area, calling signal unclear and no 4G signal.   Except the freezer, not matter for shopping or working, 2G/3G/4G signal needs to be fully covered in a supermarket, , especially in the office and checkout.     Scheme   the wiring of indoor signal distribution as below：     1, Outdoor antenna is installed on the exterior wall of distribution area to receive good signal resource. 2, Optical fiber full netcom repeater (MU) is installed on the interior wall of distribution area. 3, Wiring a 200-meter optical fiber cable to connect MU in distribution area of the ground floor to the repeater (RU) in machine room of basement 1st floor. 4, distributing channels from RU to connect 17 ceiling antennas to have fully coverage in B1.         The green areas above is the office area and checkout area.   Topology designed as follows： The signal strength tested near the exterior wall as follows, China Mobile 4G TDD-LTE1900MHz, signal strength -85dBm China Telecom 4G FDD-LTE2100MHz, signal strength -81dBm China Unicom 4G FDD-LTD1800MHz, signal strength -84dBm   Based on the signal strength tested, we would use our five-band optical fiber MU-RU full netcom devices. Because of the location of the supermarket, over 150-meter distance from distribution area in the ground floor, a MU-RU connection solution with optical fiber cable could effectively reduce cable loss, and could double-amplified to have better performance.   Device Introduction   UDAS Introduction   UDAS: Ultra Wide Band Distributed Antenna System, also called optical fiber distribution system. Its main feature is to connect Main Unit (MU) and Remote Unit (RU) with optical fiber cable, which could meet the demands of long-distance signal transmission. The signal transmission in optical fiber cable is 20-120km (single band signal) or 2-5km (multi bands signal).‘ multiplexer optical module Power supply module Minitor module Main Unit (MU) Remote Unit (RU) Working principle diagram System topology diagram     UDAS could have a better performance to solve the signal attenuation problem in transmission, which is applied to large area signal coverage. The double-amplified signal by MU and RU could effectively ensure the amplification of weak signal and ensure all devices with full output power, which makes coverage bigger and performance better. With a double-amplification, the system gain could be up to 85dBm. Full output power of RU could be 27dBm, which allows it to connect with 15-20 indoor antennas to cover 3000-5000sqm. Construction and installation     Panel Antenna is adopted as outdoor antenna, installed on the exterior wall of distribution area in the ground floor.   Main Unit (MU) is installed on the interior wall of distribution area in the ground floor, and the Remote Unit (RU) is installed in the machine room in the basement 1st floor.   To ensure the use on opening time of the supermarket, it only took 2.5 days to complete all equipment’s installation and complete the whole indoor antennas distribution. Besides, all our cables are wired in the cable trays, which won us high praise from the property and supermarket.   Project effect     After the construction and installation, we tested the signal strength that the 5 bands frequency could achieve very good performance. Below it is the device working value for 5 bands:     The output power could also achieve very good performance. Excellent calling signal and 4G data signal could be tested in every corner of the supermarket. Signal strength tested as follows: China Mobile 4G signal strength -75dBm to -90dBm China Telecom 4G signal strength -80dBm to -95dBm   China Unicom 4G signal strength -85dBm to -95dBm   JD QiXian Supermarket also had a self test, that’s to ask the all shop staff test messages, call, surf the internet at the same time to see if the performance could meet their demands. After the verification, they are very satisfied with our scheme! It took less than 10 days to finish the project after we received the project. We used the best solution and the fastest construction efficiency to meet clients demands of supermarket signal coverage.   This project is a typical signal coverage solution for supermarket.   Shenzhen ATNJ Communication Technology Co., Ltd Apr.30, 2021