DEVICE FOR SELECTION AND FREQUENCY CONVERSION OF MODULATED RADIO SIGNALS Russian patent published in 2021 - IPC H03D7/00 

FIELD: radio engineering.

SUBSTANCE: device relates to radio engineering and can be used in radio receiving devices and measuring equipment. The device consists of two-wire line (TWL) (1), the input of which is supplied with a modulated radio signal U_s (_g, _s), a two-wire line (TWL) (2), the input of which is supplied with a signal from the modulated oscillator U_g(ω_g, Ω_g). (TWL) (1), (TWL) (2) they are separately loaded on a resistance R equal to the wave resistance of the line, and they are oriented counter-oriented in the direction of the waves running in them. Between the wires (TWL) (1), (TWL) (2), a conductor (C) (3) is placed parallel to them, which is connected to a bandpass filter (BF) (4) tuned to the modulation frequency Ωg of the oscillator oscillations. In this case, the length (TWL) (1), (TWL) (2) and the length (C) (3) are selected at least one tenth of the wavelength of the modulated radio signal.

EFFECT: provided is possibility of selection and frequency conversation of radio signals of different types of modulation in one device without side conversation channels.

1 cl, 1 dwg