Broadband circularly polarized aperture-coupled microstrip antenna with dual-offset feedlines

Author

Lee, Jung-Kyu ; Ahn, Chi-Hyung ; Chang, Kai

Author_Institution

Dept. of Electr. & Comp. Engi., Texas A&M Univ., College Station, TX, USA

fYear

2011

fDate

3-8 July 2011

Firstpage

1127

Lastpage

1130

Abstract

A new feeding technique for a broadband circularly polarized aperture-coupled patch antenna is proposed operating at X-band. The stacked microstrip antennas are used for broad bandwidth and flat gain. These broadband antennas fed by slot-coupled quadrature hybrid have dual-offset feedlines for low cross-polarization level. The quadrature hybrid has multi-section with multi-layers. The grounds of coupler and antenna are connected by via. The simulated 10 dB return loss bandwidth is 35.5% from 8.1 to 11.6 GHz and the 3 dB axial ratio (AR) bandwidth is 35%.

Keywords

antenna feeds; aperture antennas; broadband antennas; microstrip antennas; X-band; broadband circularly polarized aperture-coupled microstrip antenna; dual-offset feedline; feeding technique; frequency 8.1 GHz to 11.6 GHz; gain 3 dB; loss 10 dB; low cross-polarization level; Bandwidth; Broadband antennas; Feeds; Impedance; Microstrip; Microstrip antennas; aperture-coupled; broadband antenna; circular polarization; dual-offset feedlines; slot-coupled quadrature hybrid;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on

Conference_Location

Spokane, WA

ISSN

1522-3965

Print_ISBN

978-1-4244-9562-7

Type

conf

DOI

10.1109/APS.2011.5996481

Filename

5996481