A Novel Dual Circularly Polarized Microstrip Antenna

Author

Hong, Wanchu ; Chenq, Chin-Ting ; Lin, Yu-De ; Kitazawa, Toshihide

Author_Institution

Dept. of Electron. Eng., Nat. Changhua Univ. of Educ.

fYear

2006

fDate

10-15 Sept. 2006

Firstpage

1629

Lastpage

1632

Abstract

In this paper, we propose a novel design of dual circularly polarized microstrip antenna of the cogwheel-like annular ring structure. The microstrip sector stubs are added periodically in the outer and inner edges of the microstrip annular ring and an additional microstrip line as a diameter is also placed across the inner circle to enhance performance of the axial ratio. When operated in TM₁₁ mode, this cogwheel-like microstrip annular ring antenna has a relatively wider bandwidth and a relatively smaller size than those of the traditional microstrip annular ring antenna. The three-wire transmission line and branch-line hybrid is employed as the feeding network to excite the righted-handed or left-handed direction of circular polarization

Keywords

electromagnetic wave polarisation; loop antennas; microstrip antennas; microstrip lines; branch-line hybrid; circular polarization; cogwheel-like annular ring structure; dual circularly polarized microstrip antenna; feeding network; left-handed direction; microstrip annular ring antenna; microstrip line; microstrip sector stubs; right-handed direction; three-wire transmission line; Antenna feeds; Bandwidth; Design engineering; Dielectric substrates; Distributed parameter circuits; Microstrip antennas; Microwave antennas; Microwave communication; Polarization; Transmission line antennas; Microstrip antenna; annular ring microstrip; branch-line hybrid; circular polarization;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2006. 36th European

Conference_Location

Manchester

Print_ISBN

2-9600551-6-0

Type

conf

DOI

10.1109/EUMC.2006.281413

Filename

4058158