STAGE OF MICROWAVE RECEIVER Russian patent published in 1998 - IPC

FIELD: satellite communication radio engineering equipment for TV, radio communication and broadcasting. SUBSTANCE: device has first and second waveguide polarizers. Output of first waveguide polarizer is connected to input of second polarizer. In addition device has serial circuit of first and second polarization filters. Output of second waveguide polarizer is connected to input of first polarization filter. In addition device has two low-noise amplifiers, and four additional polarization filters. In addition first and second outputs of third polarization filter are connected to inputs of fourth polarization filter and first low-noise amplifier. First output of fourth polarization filter is connected to input of second low-noise amplifier. Output of first low-noise amplifier is connected to input of fifth polarization filter. Output of second low-noise amplifier is connected to first input of sixth polarization filter, which second input is connected to first output of fifth polarization filter. Output of sixth polarization filter is connected to input of first waveguide polarizer. EFFECT: increased signal-to-noise ratio. 1 dwg