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Effect of the Longitudinal Component of the Aperture Electric Field on the Analysis of Waveguide Longitudinal Slots

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2 Author(s)
Montisci, G. ; Dipt. di Ing. Elettr. ed Elettron., Univ. di Cagliari, Cagliari, Italy ; Mazzarella, G.

Method of moment analysis of longitudinal radiating slots in the broadwall of a rectangular waveguide requires a careful choice of the basis functions. This is particularly true when we need an accurate evaluation of both longitudinal and transverse components of the Electric field on a slot with finite wall thickness. We show that entire-domain, two-dimensional, sinusoidal basis functions are a successful choice for an accurate and effective modeling of a radiating slot cut in a thick waveguide wall. In this communication we focus on slender slots, which ensure high polarization purity. If a very accurate array design is required, the effect of the longitudinal component of the Electric field, often neglected in the analysis of a narrow longitudinal slot, has shown a significant influence on the slot radiating and circuital properties. The proposed Method of Moment technique has been assessed through comparison with a commercial Finite Element Method software.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:59 ,  Issue: 11 )

Date of Publication:

Nov. 2011

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