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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.