NDLI: A Waveguide Shunt Slot-Fed Microstrip Patch Antenna—Analysis Using the Method-of-Moments

Content Provider	IEEE Xplore Digital Library
Author	Sood, K.K. Jyoti, R. Sharma, S.B.
Copyright Year	1963
Abstract	This paper presents a new waveguide shunt-slot feed for a microstrip patch antenna that is analyzed using a formulation based on the method-of-moments (MoM). Starting from a generalized formulation, expressions are obtained for a rectangular patch radiator excited by a rectangular slot using entire-domain basis functions with a Galerkin procedure to obtain the moment matrix. Expressions for the dielectric region are derived using Green's function in Fourier transform domain. The developed analysis is used on a prototype C-band radiator presenting details. Subsequently, parametric studies are performed on the key design variables of the configuration, i.e., slot dimensions, axial offset of slot and patch position w.r.t. slot center. A slot length of 0.08λ is found a good initial design estimate to obtain resonance. The variation of coupled power with axial slot offset is reported while showing little effect on resonant frequency. This can be a useful design aid for linear arrays to control amplitude excitations. Patch offset from slot center is found to be noncritical in regard to alignment tolerances. However, changes in coupling factor and resonant frequency are reported. The proposed technique is validated through a commercial e.m. simulator, prototype hardware measurements and comparison to an earlier reported antenna. The paper thus establishes the proposed feeding technique using a developed MoM based analysis and presents useful parametric studies to serve as design aids.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	5385
Ending Page	5394
Page Count	10
File Size	2928541
File Format	PDF
ISSN	0018926X
Volume Number	61
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Method of moments Couplings Microstrip Transmission line matrix methods Vectors Feeds Substrates waveguide shunt-slot Method-of-moments (MoM) microstrip patch waveguide-fed microstrip patch
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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