A wider band microstrip antenna for circular polarization

Author

Bhattacharyya, Arun K. ; Shafai, Lotfollah

Author_Institution

Dept. of Electr. Eng., Manitoba Univ., Winnipeg, Man., Canada

Volume

36

Issue

2

fYear

1988

fDate

2/1/1988 12:00:00 AM

Firstpage

157

Lastpage

163

Abstract

Circular polarization is achieved by separating two degenerate orthogonal modes in an annular ring patch antenna, by using an ear at the outer periphery. The analysis of such a structure is performed by using the generalized transmission line model. It is found theoretically that this structure can be used to generate circular polarization over a wider frequency range than other structures. An annular ring is designed and its performance is evaluated. Good agreement between the theory and the experiment is obtained. It is also found that the axial ratio bandwidth is higher for the TM₁₂ mode than the TM₃₂ mode of operation in an annular ring antenna

Keywords

antenna theory; electromagnetic wave polarisation; microstrip antennas; transmission line theory; annular ring patch antenna; axial ratio bandwidth; circular polarization; generalized transmission line model; outer periphery; wider band microstrip antenna; Antenna radiation patterns; Bandwidth; Ear; Feeds; Impedance; Microstrip antennas; Patch antennas; Performance analysis; Polarization; Resonant frequency;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.1092

Filename

1092