INTERFERENCE-FREE TRANSMISSION SYSTEM WITH A DIGITAL SELECTION UNIT AND AN AUTOMATIC MATCHING DEVICE WITH CONTINUOUS IMPEDANCE ADJUSTMENT Russian patent published in 2021 - IPC H03H7/40 H04B1/02 

FIELD: radio communication technology.

SUBSTANCE: invention relates to radio communication technology and can be used in radio stations of the short-wave (HF) range, as well as in radio stations of other ranges operating in conditions of concentrated interference. An interference-free transmission system with a digital selection unit and an automatic matching device with continuous impedance adjustment consists of a high-frequency generator (HFG), a bidirectional coupler, a matching circuit and an antenna, as well as a tuning unit, while the HFG contains a sinusoidal signal generator (SSS), a power amplifier, and a key, while additionally a digital selection unit is introduced, made with the possibility of separating the useful signal and suppressing other spectral components while maintaining the phase relationships of the useful signal from both outputs of the bidirectional coupler, and four digital-to-analog converters (DAC), and the matching circuit is made on discrete elements.

EFFECT: increasing the noise immunity of the radio transmitting device to interference induced into the antenna from the signals of powerful radio transmitting devices.

1 cl, 2 dwg