A Broadband Low Profile Patch Antenna of Compact Size With Three Resonances

Author

Xiong, Jiang ; Ying, Zhinong ; He, Sailing

Author_Institution

State Key Lab. of Modern Opt. Instrum., Zhejiang Univ., Hangzhou

Volume

57

Issue

6

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

1838

Lastpage

1843

Abstract

An E-shaped patch antenna fed by a folded L-shaped probe is proposed. The shorted wall loading is employed to make the antenna compact, and the lateral size is only 0.196 lambda_L times 0.221 lambda_L, where lambda_L is wavelength at the lower cutoff frequency of the measured operating bandwidth in the free space. Three adjacent resonances are utilized to achieve a broad band while keeping the antenna very low profile. The air substrate is only 4 mm (i.e., 0.029 lambda_L) thick, and the measured impedance bandwidth is about 19.8% (with a central frequency of 2.378 GHz). The procedure of optimal design is also described.

Keywords

antenna feeds; broadband antennas; impedance matching; microstrip antennas; E-shaped patch antenna; air substrate; antenna feeds; broadband antenna; folded L-shaped probe; impedance bandwidth; resonance characteristics; Antenna measurements; Bandwidth; Cutoff frequency; Frequency measurement; Loaded antennas; Patch antennas; Probes; Resonance; Size measurement; Wavelength measurement; Broadband antennas; E-shaped patch; L-shaped probe; low profile; multiresonance;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2009.2016792

Filename

5062524