Computer-Aided Design of Low-Noise Microwave Circuits

Details Computer-Aided Design of Low-Noise Microwave Circuits Computer-Aided Design of Low-Noise Microwave Circuits

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phdt........72w&link_type=abstract

Thesis (PH.D.)--CALIFORNIA INSTITUTE OF TECHNOLOGY, 1991.Source: Dissertation Abstracts International, Volume: 52-07, Section: B

Astronomy and Astrophysics

Astronomy

Radio Astronomy

Scientific paper

Devoid of most natural and manmade noise, microwave frequencies have detection sensitivities limited by internally generated receiver noise. Low-noise amplifiers are therefore critical components in radio astronomical antennas, communications links, radar systems, and even home satellite dishes. A general technique to accurately predict the noise performance of microwave circuits has been lacking. Current noise analysis methods have been limited to specific circuit topologies or neglect correlation, a strong effect in microwave devices. Presented here are generalized methods, developed for computer-aided design implementation, for the analysis of linear noisy microwave circuits comprised of arbitrarily interconnected components. Included are descriptions of efficient algorithms for the simultaneous analysis of noisy and deterministic circuit parameters based on a wave variable approach. The methods are therefore particularly suited to microwave and millimeter-wave circuits. Noise contributions from lossy passive components and active components with electronic noise are considered. Also presented is a new technique for the measurement of device noise characteristics that offers several advantages over current measurement methods.

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