Accession Number : ADA184473

Title :   A Study of Scattering from E-Plane Circuit Elements.

Descriptive Note : Technical rept.,

Corporate Author : TEXAS UNIV AT AUSTIN MICROWAVE LAB

Personal Author(s) : Zhang,Qiu ; Itoh,Tatsuo

PDF Url : ADA184473

Report Date : May 1987

Pagination or Media Count : 108

Abstract : This study contains two parts. In part one, a new analytical technique is introduced to characterize the scattering phenomena of a number of planar E-plane obstacles. This technique is based on the spectral domain method combined with residue calculus. This is the first time the spectral domain method has been used to solve a waveguide excitation problem. It provides some attractive features. For instance, it can handle a wide non-touching E-plane fin on a dielectric substrate; the method deals with inhomogeneous algebraic equations instead of integral equations; and also the spectral domain Green's functions have simple closed-form expressions. The calculated results for a simplified case are compared with existing data, and are in good agreement. Several curves, useful for E-plane Configurations, are included. Part two presents an analysis and design of an evanescent mode bandpass waveguide filter with non-touching E-Plane fins. The Theoretical analysis is based on the generalized scattering matrix technique in conjunction with the the spectral domain approach, which is described in part one, and mode matching method. The method used in this study takes into account the dominant as well as the higher order mode effects. The measured filter responses in Ka band (26.5-40.0 GHz) are in good agreement with those obtained by this analysis. (Author)

Descriptors :   *WAVEGUIDE FILTERS, *MICROWAVE FILTERS, BANDPASS FILTERS, PLANAR STRUCTURES, STAGING, ELECTRIC FIELDS, ELECTROMAGNETIC SCATTERING, SUBSTRATES, EIGENVECTORS, DIELECTRICS, ELECTRICAL IMPEDANCE, GREENS FUNCTION, EQUIVALENT CIRCUITS, KA BAND

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE