RECEIVER STAGE INCORPORATING PROVISION FOR SEPARATING ORTHOGONAL POLARIZATION SIGNALS OF TWO FREQUENCY BANDS Russian patent published in 2000 - IPC

FIELD: radio-relay and satellite communication systems operating in superhigh-frequency band. SUBSTANCE: receiver stage designed for simultaneous reception of two frequency bands and separation of reception and transmission frequencies has round waveguide section; connected to the latter through waveguide adapter with four side outputs uniformly arranged over cross-sectional area circumference are waveguide of smaller diameter and polarized selector; it also has low-noise amplifiers connected to them, their quantity corresponding to that of side outputs; amplifier outputs are connected through rectangular waveguide sections to inputs of coaxial waveguide series-and-shunt tees. EFFECT: improved noise figure in receive mode. 1 dwg