Keywords

Unloaded Q-factor determination, Coupling coefficient (beta) measurement, Input reflection coefficient (S11) measurement, Numerical Smith chart replacement, Stirling and Bessel interpolation with central differences

Abstract

An algorithm is developed for the HP automated network analyzer that can determine the three basic parameters of microwave cavity resonators: the unloaded resonant frequency fo, the unloaded Q-factor Qo, and the coupling coefficient β. The input reflection coefficient of the resonator is measured via the network analyzer, which is driven by an HP desk computer. The graphical techniques (Smith Chart) are replaced by the much faster calculations on the computer using numerical techniques. Stirling and Bessel’s formulas, in conjunction with the central difference interpolation method, are used to interpolate between sampled points to enhance the accuracy of the algorithm.

Experimental results are compared against theoretical calculations for different cavities to support the validity of the algorithm.

Notes

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Graduation Date

1986

Semester

Summer

Advisor

Christodoulou, Christos

Degree

Master of Science (M.S.)

College

College of Engineering

Format

PDF

Pages

61 pages

Language

English

Rights

Public Domain

Length of Campus-only Access

None

Access Status

Masters Thesis (Open Access)

Identifier

DP0020373

Subjects

Cavity resonators--Mathematical models; Electric network analyzers; Microwave measurements; Resonance--Measurement; Quality factor meters

Accessibility Status

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