Cavity feed technique for slot-coupled microstrip patch array antenna

Author

Jassim, A.M. ; Hristov, H.D.

Author_Institution

Dept. of Radiotechnics, Tech. Univ. of Varna, Bulgaria

Volume

142

Issue

6

fYear

1995

fDate

12/1/1995 12:00:00 AM

Firstpage

452

Lastpage

456

Abstract

Slot-coupled microstrip patch arrays fed by rectangular overmoded cavities are described and their radiation characteristics analysed using simplified cavity models both for the illuminating and patch resonant cavities. In particular, 4×4 single cavity-fed and 8×8 stepped cavity-fed patch arrays were built and studied. With regard to the radiation patterns and directivity the measurements indicated a satisfactory agreement with the theory. The measured relative gain bandwidth ranges from 1.2% to 3.1% depending on the antenna configuration. Compared with a similar size microstripline network-fed patch array the 8×8 stepped cavity-fed patch array antenna has better efficiency and much lower side lobes

Keywords

antenna feeds; antenna radiation patterns; cavity resonators; microstrip antenna arrays; 4×4 single cavity-fed patch arrays; 8×8 stepped cavity-fed patch arrays; cavity feed technique; cavity models; directivity; illuminating cavities; patch resonant cavities; radiation characteristics; radiation patterns; rectangular overmoded cavities; relative gain bandwidth; slot-coupled microstrip patch array antenna;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:19952224

Filename

487854