Date of Award

Fall 1988

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)


Electrical and Computer Engineering

First Advisor

Ishii, Thomas K.

Second Advisor

Jodat, Ronald W.


A solution to the scattered electromagnetic field of an H-plane conductive obstacle in rectangular waveguide is obtained. The solution is formulated using an equivalent source representation of the obstacle in conjunction with a Green's function for rectangular waveguide. The method of moments is applied to the integral equation of the solution to determine the unknown coefficients of the assumed equivalent source function. The H-plane straight iris is analyzed, and the accuracy and nature of the derived solution is verified by comparing the results to published data. The numerical analysis is applied to the H-plane tapered iris, and the results are in good agreement with available data. Given the solution to the scattered electromagnetic field, the tapered iris is characterized by its scattering matrix, input and output impedance, insertion loss, and equivalent circuit . A graphical representation of the electromagnetic field behavior of the H-plane tapered iris provides a qualitative analysis that is consistent with the quantitative results.



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