Characteristics of aperture-coupled coplanar microstrip subarrays

Author

Au, T.M. ; Tong, Kin Fai ; Luk, K.M.

Author_Institution

Center for Wireless Commun., Nat. Univ. of Singapore, Singapore

Volume

144

Issue

2

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

137

Lastpage

140

Abstract

The characteristics of aperture-coupled microstrip antennas with parasitic elements are studied. Four configurations for increasing the bandwidth of aperture-coupled microstrip antennas are described. Additional patches are gap-coupled to the nonradiating edges of the rectangular fed patch. The spectral domain Green function approach and the reciprocity method are used for the analysis. The SWR bandwidth and the E- and H-plane beamwidths can be improved by changing the sizes and the locations of the parasitic patches. Low backlobe radiation can be achieved by locating a plane reflector slightly below the microstrip feedline. The bandwidth of the microstrip subarray can also be enhanced with the addition of the plane reflector. The theory is confirmed by experimental data

Keywords

Green´s function methods; antenna feeds; antenna radiation patterns; microstrip antenna arrays; reflector antennas; spectral-domain analysis; E-plane beamwidth; H-plane beamwidth; SWR bandwidth; aperture coupled coplanar microstrip subarrays; experimental data; gap coupled patches; low backlobe radiation; microstrip feedline; nonradiating edges; parasitic elements; plane reflector; reciprocity method; rectangular fed patch; spectral domain Green function;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:19971017

Filename

587448