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Input impedance of a probe-fed circular microstrip antenna with thick substrateA method of computing the input impedance for the probe fed circular microstrip antenna with thick dielectric substrate is presented. Utilizing the framework of the cavity model, the fields under the microstrip patch are expanded in a set of modes satisfying the boundary conditions on the eccentrically located probe, as well as on the cavity magnetic wall. A mode-matching technique is used to solve for the electric field at the junction between the cavity and the coaxial feed cable. The reflection coefficient of the transverse electromagnetic (TEM) mode incident in the coaxial cable is determined, from which the input impedance of the antenna is computed. Measured data are presented to verify the theoretical calculations. Results of the computation of various losses for the circular printed antenna as a function of substrate thickness are also included.
Document ID
19860061900
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Davidovitz, M.
(Illinois Univ. Urbana, IL, United States)
Lo, Y. T.
(Illinois, University Urbana, United States)
Date Acquired
August 12, 2013
Publication Date
July 1, 1986
Publication Information
Publication: IEEE Transactions on Antennas and Propagation
Volume: AP-34
ISSN: 0018-926X
Subject Category
Electronics And Electrical Engineering
Accession Number
86A46638
Funding Number(s)
CONTRACT_GRANT: NAG3-418
Distribution Limits
Public
Copyright
Other

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