Time: May.28 2019
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).
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,
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.