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Features and Application of cell phone signal jammers and amplifier

With the rapid development of mobile communication networks, network coverage is growing, but because of a variety of building, developing road traffic, so that indoor wireless communications there are still some weak links can not meet the needs of customers, mainly the following problems,
1. blind spot: the signal after the loss is less than the phone receiver sensitivity, resulting in poor cell phone.
2. Weak: The main signal is lower than after the loss of the phone receiver sensitivity, resulting in poor cell phone.
3. conflict zones: mainly high-rise building area wireless signals from a plurality of cells, and more for the floor, wall instability reflected signal, resulting in frequent switching (ie ping-pong effect), seriously affecting the normal communication handset.
4. Busy area: mainly large traffic areas, station capacity is difficult to meet the communication needs of the user can not access the mobile network for communication.
For the above problem, by an increase in the base station or stations placed directly strengthen coverage can be solved, but the project is more complex and consumes a huge cost. How to improve the coverage in order to achieve seamless indoor network coverage, improve call quality, but also to maximize the reduction of costs is an important issue for network optimization.Signal amplifier and thus ushered in the era of the shield!
Features ofcell phone jammer
1. Only shields mobile phone signals do not affect the normal operation of other electronic devices
2. Only shields mobile phone signals inside the examination room, examination room outside of the phone is not interference, but does not interfere with the base station
3. Only shielded transmission base station downlink frequency without affecting the uplink frequency
4. Green environmental protection, electromagnetic field strength is far below the national standard, without any effect on the human body
5. Operation is simple and correct installation of the antenna, connect the power to run automatically
cell phone repeater is this:
cell phone repeater is buffered into the secondary amplifier stage of the programmable gain amplifier PGA, by filtering the signal after amplification with the most flat frequency response characteristics of the filter is 8-order low-pass filter, which can be programmed setting the cutoff frequency from 10Hz to 100KHz, secondary filter second-order active low-pass filter to eliminate interference digital, low-pass filtering plus optional secondary band-pass filter, whose lower cut-off frequency of the use of pull switch settings , low-pass and band-pass filter can be programmed to access or skip.