Title :
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
fDate :
4/1/2010 12:00:00 AM
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);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2010.2041152
