TWO-CHANNEL NULL RADIOMETRE Russian patent published in 2010 - IPC G01S13/95 G01R29/26 

FIELD: physics.

SUBSTANCE: proposed radiometre comprises matched load, first and second noise generators, attenuator, HF modulator, antenna, first and second directed couplers, first and second receivers, first and second LF preamplifiers, first and second homodyne filters, first and second LF amplifiers, first and second HF filters, LF and HF modulators, comparator connected, on one side, with radiometer common bus, control unit, dynamic integrator with its output making radiometer digital bus, and first and second current sources. Note here that matched load, first and second directed couples, first and second noise generators, first and second current sources, attenuator and HF modulator are arranged on temperature-controlled p.c.b. and stay in thermal contact therewith.

EFFECT: expanded performances in operation in null measurements mode.

2 cl, 6 dwg