Compact Elongated Mushroom (EM)-EBG Structure for Enhancement of Patch Antenna Array Performances

Author

Coulombe, Martin ; Koodiani, Sadegh Farzaneh ; Caloz, Christophe

Author_Institution

Centre de Rech. en Electron. Radiofrequence (CREER), Ecole Polytech. de Montreal, Montreal, QC, Canada

Volume

58

Issue

4

fYear

2010

fDate

4/1/2010 12:00:00 AM

Firstpage

1076

Lastpage

1086

Abstract

A compact elongated mushroom electromagnetic band-gap (EM-EBG) structure, exploiting the thickness of the substrate to achieve higher isolation compared to the case of the conventional mushroom EBG (CM-EBG), is proposed for the enhancement of the performances of patch antenna arrays. Guidelines, based on fairly accurate formulas, are provided for the design of the stop-band of the structure. The compactness of the EM-EBG is investigated and shown to be superior to that of the CM-EBG in practical cases. The superior reduction of mutual coupling of the EM-EBG is demonstrated by full-wave and experimental results both for a pair of patches and for a 4-element patch array. Finally, the benefits of the EM-EBG in terms of array processing, specifically side-lobe level (SLL) control and direction of arrival (DOA) estimation, are presented.

Keywords

direction-of-arrival estimation; microstrip antenna arrays; photonic band gap; array processing; compact elongated mushroom electromagnetic band gap structure; direction of arrival estimation; patch antenna array performance; sidelobe level control; Antenna arrays; Array signal processing; Direction of arrival estimation; Frequency; Guidelines; Metamaterials; Microstrip antenna arrays; Microstrip antennas; Mutual coupling; Patch antennas; Periodic structures; Antennas arrays; array processing; direction of arrival (DOA); electromagnetic band-gap (EBG) structures; microstrip patch antennas; mutual coupling; side-lobe level (SLL);

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2010.2041152

Filename

5395661