Radiometer measurement linearization system and method

Details Radiometer measurement linearization system and method Radiometer measurement linearization system and method

2007-07-31

2007-07-31

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

Reexamination Certificate

active

11301298

ABSTRACT:
A radiometer system includes a dual channel, quadrature hybrid amplifier circuit that receives an antenna signal and a known reference signal to equalize gain in two parallel gain stages. A detector circuit receives a signal from the quadrature hybrid amplifier circuit and detects the signals to form a detected output for eliminating sensitivity to gain variations, improving dynamic range of the input signal, and reducing calibration requirements. A log ratio amplifier receives and linearizes the detected output. An integrator circuit receives a signal from the log ratio amplifier and sums the signal over an observation.

REFERENCES:
patent: 5327029 (1994-07-01), Ericson et al.
patent: 6054900 (2000-04-01), Ishida et al.
patent: 6424223 (2002-07-01), Wang et al.
patent: 2005/0063447 (2005-03-01), Ammar
patent: 2005/0122254 (2005-06-01), Ammar

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