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Computer-aided design of low noise microwave circuits


Wedge, Scott William (1991) Computer-aided design of low noise microwave circuits. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/ZRTG-GX48.


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.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:circuit simulation; computer-aided design; correlation matrix; linear connection analysis; measurement theory; microwave/RF CAD; multi-port; Noise; representation; scattering parameters; six-port; subnetwork growth; wave
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Electrical Engineering
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Rutledge, David B.
Thesis Committee:
  • Rutledge, David B. (chair)
  • Elachi, Charles
  • Zmuidzinas, Jonas
  • Vaidyanathan, P. P.
  • Middlebrook, Robert David
Defense Date:23 May 1991
Record Number:CaltechETD:etd-09172003-101254
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3581
Deposited By: Imported from ETD-db
Deposited On:17 Sep 2003
Last Modified:20 Dec 2019 19:47

Thesis Files

PDF (Wedge_sw_1991.pdf) - Final Version
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