A Wideband Patch Antenna With Dual-Cylindrical Probe Feed

Author

Zhou, Hongyu ; Kefauver, Neill W. ; Filipovic, Dejan S.

Author_Institution

Dept. of Electr., Comput., & Energy Eng., Univ. of Colorado, Boulder, CO, USA

Volume

8

fYear

2009

fDate

7/1/1905 12:00:00 AM

Firstpage

1321

Lastpage

1324

Abstract

A broadband air-loaded patch antenna is presented in this letter. The antenna is differentially fed by two capacitively coupled thick cylindrical probes carefully integrated with the radiator to enhance the overall mechanical integrity. The coupling between the ports is reduced by a metallic wall symmetrically placed between the probes and firmly attached to the patch. The designed antenna has 48% bandwidth defined for broadside gain above 8 dBi, VSWR < 2:1, and port isolation >11 dB. This bandwidth increases to 56 % if desired gain is above 5 dBi. High levels of crosspolarization rejection and pattern stability are also demonstrated. The design is conducted using commercial finite-element software, and the performance is verified with thorough measurements.

Keywords

antenna feeds; broadband antennas; microstrip antennas; bandwidth; broadband air-loaded patch antenna; capacitively coupled thick cylindrical probes; crosspolarization rejection; dual-cylindrical probe feed; finite-element software; mechanical integrity; pattern stability; radiator; wideband patch antenna; Broadband antenna; cylindrical probe; patch antenna; slot antenna array;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2009.2038179

Filename

5350756