A Broadband Impedance Matching Method for Proximity-Coupled Microstrip Antenna

Author

Sun, Dan ; YoU, Lizhi

Author_Institution

Radar & Avionics Inst., AVIC, Wuxi, China

Volume

58

Issue

4

fYear

2010

fDate

4/1/2010 12:00:00 AM

Firstpage

1392

Lastpage

1397

Abstract

In a proximity-coupled microstrip antenna, when a laminate used is too thick for the antenna layer, the coupling will be decreased. And it is hard to achieve broadband impedance matching. The authors present a method to optimize impedance matching through narrow cavity backed configuration. A prototype antenna is designed with this method and fabricated. Simulation and measurement results indicate that the bandwidth of the antenna exceeds 40% (VSWR < 2.0). The antenna has a larger effective coupling as compared with the conventional proximity-coupled antenna without the narrow cavity backed configuration. It is easier to enhance the bandwidth with a thicker laminate. Meanwhile, this antenna is benefit for manufacturing and assembling to an array due to its simple configuration.

Keywords

impedance matching; microstrip antennas; antenna layer; broadband impedance matching method; narrow cavity backed configuration; proximity-coupled microstrip antenna; Antenna measurements; Bandwidth; Broadband antennas; Design methodology; Impedance matching; Laminates; Manufacturing; Microstrip antennas; Optimization methods; Prototypes; Broadband impedance matching; microstrip antenna; narrow cavity backed configuration; proximity-coupled;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2010.2041312

Filename

5398880