Broad-band suspended probe-fed plate antenna with low cross-polarization levels

Author

Zhi Ning Chen ; Chia, M.Y.W.

Author_Institution

Centre for Wireless Commun., Nat. Univ. of Singapore, Singapore

Volume

51

Issue

2

fYear

2003

fDate

2/1/2003 12:00:00 AM

Firstpage

345

Lastpage

347

Abstract

A new feeding scheme for enhancing the radiation performance of a suspended plate antenna with a broad bandwidth is presented experimentally. By means of a probe-fed half-wavelength strip, the high cross-polarization levels of the suspended plate antenna are suppressed effectively, which result mainly from the undesired excitation of higher-order modes. Measurements on the antenna with the proposed feeding structure have demonstrated the good performances with a high ratio of co- to cross-polarization levels and stable radiation patterns across a 20% bandwidth for VSWR≤2 : 1.

Keywords

antenna feeds; antenna radiation patterns; broadband antennas; electric impedance measurement; microstrip antennas; probes; VSWR; antenna measurements; broad-band probe-fed plate antenna; copolarization to crosspolarization level ratio; cross-polarization levels; feeding structure; higher-order modes excitation; impedance bandwidth; input impedance; low cross-polarization levels; microstrip antennas; radiation performance; suspended probe-fed plate antenna; Adaptive arrays; Antenna feeds; Antenna measurements; Antenna radiation patterns; Bandwidth; Coaxial components; Electromagnetic coupling; Impedance; Microstrip antennas; Probes;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2003.809062

Filename

1195663