The Broadband Spiral Antenna Design Based on Hybrid Backed-Cavity

Author

Liu, Chunheng ; Lu, Yueguang ; Du, Chunlei ; Cui, Jingbo ; Shen, Ximing

Author_Institution

Northern Inst. of Electron. Equip. of China, Beijing, China

Volume

58

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1876

Lastpage

1882

Abstract

Here, a hybrid backed-cavity with electromagnetic band-gap (EBG) structure and a perfect electronic conductor (PEC) is proposed for an Archimedean spiral antenna. This cavity makes the spiral antenna work operate over the 10:1 bandwidth and without the loss introduced by absorbing materials that are used conventionally to broadband spirals. Based on the artificial magnetic conductor (AMC) characteristic, an EBG is placed in the outer region of backed-cavity to improve the blind spot gain at low frequency. A PEC at the center of the structure is used to obtain high gain at high frequency. The antenna performances are improved significantly for of the low profile spiral antenna is improved significantly. A typical spiral antenna with a hybrid backed cavity is fabricated and studied experimentally. The experimental data are consistent with that of the simulation results.

Keywords

broadband antennas; photonic band gap; spiral antennas; Archimedean spiral antenna; antenna performances; artificial magnetic conductor; broadband spiral antenna; electromagnetic band-gap structure; hybrid backed-cavity; perfect electronic conductor; Arm; Bandwidth; Broadband antennas; Conducting materials; Frequency; Interference; Magnetic materials; Metamaterials; Periodic structures; Reflector antennas; Spirals; UHF antennas; Artificial magnetic conductor (AMC); broadband; electromagnetic band-gap (EBG); hybrid cavity; spiral antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2010.2041147

Filename

5395651