Patent ID: 6178319
Filing Date: 2001-01-23
Classification: H03D

Abstract:
Microwave mixing circuitry comprising:a plurality of separate microwave signal input terminals each for receiving a horizontally polarized wavesignal and a vertically polarized wave signal, repsectively;local oscillator for geneating a local oscillation signal;a plurality of mixing circuitries for mixing each of said horizontally polarized wave signal and said vertically polarized wave signal, said mixing circuitries include field effect transistors (""FETs"") having gates coupled to said microwave signal input terminals, and drains which are coupled to said local oscillator;a plurality of control circuitries for enabling operation of one of said mixing circuitries while preventing operation of another of said mixing circuitries to produce an intermediate frequency signal; andan intermediate frequency signal output terminal for outputting the intermediate frequency signal produced by the operation of one of said mixing circuitries.