LOW-CHANNEL RADIO RELAY STATION Russian patent published in 2017 - IPC H04B7/14 

FIELD: radio engineering, communication.

SUBSTANCE: invention can be used for the organization of low-channel communication lines, branching of channels from trunk communication lines and remote control of HF and VHF radio stations. The low-channel radio relay station comprises a metre-band antenna, a metre-band transducer unit (MBTU) of waves, consisting of a feedthrough-power metre, a frequency isolation (FI) reception filter, a high-frequency amplifier (HFA), a local oscillator frequency synthesiser (LOFS), the first intermediate frequency amplifier (IFA1), the second intermediate frequency amplifier (IFA2), a frequency detector, a power amplifier and a frequency isolation filter, a switching panel, a monitoring and control unit (MCU) consisting of a matching unit, a group reception amplifier, a reception pilot-signal subunit, a transmission pilot-signal subunit, an extension block and a balance-to-unbalance transformer, a channel multiplexer, an exciter frequency synthesizer.

EFFECT: extension of the station's frequency range.

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