Investigations into a cavity-backed circular-patch antenna

Author

Karmakar, Nemai Chandra

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

50

Issue

12

fYear

2002

fDate

12/1/2002 12:00:00 AM

Firstpage

1706

Lastpage

1715

Abstract

An empirical formula for resonant frequency of a circular cavity-enclosed circular-patch antenna is tested with measured results. The patch miniaturization in the presence of the cavity is proved. Different design curves in terms of resonant frequencies and bandwidth are derived to facilitate antenna design without a priori knowledge of complex numerical techniques. A simple gain formula for a circular-patch antenna is derived and tested against the measured gain data. The results agree very well. The beamwidth, axial ratio, and mutual coupling in the presence of the cavity are investigated.

Keywords

antenna radiation patterns; electromagnetic coupling; microstrip antennas; resonance; antenna design; axial ratio; bandwidth; beamwidth; cavity-backed circular-patch antenna; circular cavity-enclosed antenna; design curves; gain formula; measured gain data; mutual coupling; patch miniaturization; radiation characteristics; resonant frequencies; Antenna measurements; Antenna radiation patterns; Apertures; Bandwidth; Microstrip antenna arrays; Microstrip antennas; Mutual coupling; Patch antennas; Resonant frequency; Testing;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2002.807427

Filename

1178719