ON-BOARD REPEATER BUILT-IN CONTROL SYSTEM Russian patent published in 2020 - IPC H04B7/185 

FIELD: radio equipment.

SUBSTANCE: invention relates to radio engineering and is intended for control of a repeater, in particular a repeater of phase-shift keyed signals, which use transceivers with direct frequency conversion receivers, which are located onboard of aircraft. Input of built-in control system (BCS) is connected with low communication to output of transmitter (TRM), output of BCS is connected with low communication to input of receiver (RCR). BCS comprises first attenuator (Att1), connected to its output quadrature mixer (QM), to the first output of which the first low-pass filter (LPF1) is connected, to the second output a second low-frequency filter (LPF2) is connected, and to the heterodyne input one of the outputs of the frequency synthesizer of the transmitter (FS TRM) is connected. Outputs LPF1, LPF2 are connected respectively to the first and second modulating inputs of the quadrature phase-shift keying device (QPM), one of the outputs of the receiver frequency synthesizer (FS RCR) is connected to the signal input of the QPM, and the input of the second attenuator (Att2) is connected to its output. Switch is connected to output Att2, its output being connected to RCR input.

EFFECT: simple control system.

1 cl, 3 dwg