microwave radio-relay communication
A microwave communication trunk includes a terminal station and several relay stations. The equipment of the terminal station has an antenna, transmitter, receiver and carrier terminal equipment, and the repeater station generally only has an antenna, transmitter and receiver.
The antennas are all directional, with a gain of about 40 dB. At present, the most commonly used horn paraboloid antenna and Cassegrain double reflector antenna are connected to the transmitter or receiver by high-frequency coaxial cable or waveguide. In a microwave station, transmitting and receiving antennas in the same transmission direction can be installed separately, or a pair of antennas can be shared.
Microwave transmission generally uses linearly polarized (horizontally polarized, vertically polarized) waves, so different polarized waves can be used between adjacent channels or between transceiver and receiver. Reasonable allocation of transceiver frequency and polarization, and good polarization decoupling defense degree of antenna feeder system should ensure that the communication quality between channel and transceiver system will not be affected by interference.