A circularly polarized short backfire antenna excited by an unbalance-fed cross aperture

Author

Li, RongLin ; Thompson, Dane C. ; Papapolymerou, John ; Laskar, Joy ; Tentzeris, Manos M.

Author_Institution

Georgia Electron. Design Center, Georgia Inst. of Technol., Atlanta, GA

Volume

54

Issue

3

fYear

2006

fDate

3/1/2006 12:00:00 AM

Firstpage

852

Lastpage

859

Abstract

An unbalance-fed cross aperture is developed to excite a short backfire antenna (SBA) for circular polarization. The cross aperture consists of two orthogonal H-shaped slots with a pair of capacitive stubs and is fed by a single probe that forms an unbalanced feed with a shorting pin. It is demonstrated that the cross-aperture-excited SBA can achieve an axial ratio (les 3 dB) bandwidth of 4.2% with a voltage standing wave ratio (VSWR) bandwidth of 6.5% (VSWR<1.2) and a gain of 14 dBi. The antenna structure is described and the simulation and experimental results are presented. The mechanisms for impedance matching and circular-polarization production are analyzed

Keywords

antenna feeds; aperture antennas; electromagnetic wave polarisation; impedance matching; slot antennas; SBA; VSWR; axial ratio bandwidth; capacitive stub; circular polarization; impedance matching; orthogonal H-shaped slot; short backfire antenna; unbalance-fed cross aperture; voltage standing wave ratio; Aperture antennas; Bandwidth; Feeds; Impedance matching; Microstrip; Polarization; Probes; Satellite antennas; Slot antennas; Voltage; Circularly polarized antenna; short backfire antenna (SBA); slot-fed antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2006.869910

Filename

1603811