Spectral analysis of microstrip antennas with CG-FFT: two-dimensional results

Author

Willis, Thomas M. ; Sengupta, Dipak L.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

Volume

37

Issue

7

fYear

1989

fDate

7/1/1989 12:00:00 AM

Firstpage

810

Lastpage

816

Abstract

Theoretical expressions for the currents excited on the top and bottom surfaces of a coaxial-probe-fed patch antenna are derived. Exact expressions for the far-zone field in terms of the total current on the patch are found. The analysis is specialized to a two-dimensional case. Detailed results for current, far-zone fields, and radiating-aperture admittance have been computed for this two-dimensional antenna model using the conjugate-gradient-fast Fourier transform (CG-FFT) technique. For a thick-substrate antenna it is found that the upper surface current on the patch is significant. Under this condition the traditional approximation of the total current by the bottom surface current alone may be in considerable error

Keywords

antenna radiation patterns; fast Fourier transforms; iterative methods; microstrip antennas; spectral analysis; bottom surface current; coaxial-probe-fed patch antenna; conjugate-gradient-fast Fourier transform; current; far-zone field; microstrip antennas; radiating-aperture admittance; spectral analysis; thick-substrate antenna; two-dimensional case; upper surface current; Admittance; Apertures; Coaxial components; Copper; Dielectric substrates; Green´s function methods; Microstrip antennas; Patch antennas; Skin; Spectral analysis;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.29374

Filename

29374