Subscriber station with duplex antenna amplifier

Abstract

For the purpose of making the system more economic, given full compensation of transmitter and receiver signal attenuation in the communication cable, the circuit controlling transmitter enable/disable status, including a controllable power source (control command converter) and a low pass filter separating a receive/transmit UHF signal from a lower frequency up to direct voltage) signal, a number of control commands, is introduced into mobile station, mobile station having autonomous power supply. According to the first variant of the device, the control command, having passed the low pass filter (), enables the power source () control from which power is supplied to the power amplifier () whose amplification is selected so as to compensate attenuation of the transmitter signal traveling from mobile station () to antenna (). The voltage supplied from the mobile station () via the communication cable is applied to a stabilizer () via the other low pass filter () isolating the supply circuit from radio frequency receive and transmit signals. According to the second variant of the device, a splitter () and rejector () are used in the duplex antenna amplifier (). This makes implementation of antenna amplifier simpler and cheaper.