Low-profile circularly polarised loop antenna assisted with an effective PMC bandwidth

Author

Li, Huaqing ; Xu, K.W. ; Wang, X.B. ; Kanan, Riad ; Ran, L.X.

Author_Institution

Lab. of Appl. Res. on Electromagn. (ARE), Zhejiang Univ., Hangzhou, China

Volume

49

Issue

16

fYear

2013

fDate

Aug. 1 2013

Firstpage

978

Lastpage

979

Abstract

Proposed is an ultra-low-profile loop antenna backed by an electromagnetic bandgap (EBG) surface reflector, where the EBG surface can effectively exhibit the property of a perfect magnetic conductor (PMC) inside a deliberately designed bandwidth. It is shown that, assisted by the effective PMC bandwidth, while the proposed antenna is with a 0.07-λ spacing between the loops and the EBG reflector, its axial ratio (AR) and voltage standing wave ratio (VSWR) performances are significantly improved. Experimental measurements show that the prototype antenna has a 3 dB AR bandwidth of 17% with an input VSWR less than 1.6. The proposed approach can find a wide range of low-profile circularly polarised (CP) antenna applications.

Keywords

loop antennas; photonic band gap; polarisation; EBG surface reflector; PMC; VSWR; axial ratio; electromagnetic band gap; perfect magnetic conductor; ultra-low-profile circularly polarised loop antenna; voltage standing wave ratio;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2013.1601

Filename

6571480