Title :
Mutual Coupling Reduction Using EBG in Steering Antennas
Author :
Expósito-Domínguez, Gonzalo ; Fernández-Gonzalez, José-Manuel ; Padilla, Pablo ; Sierra-Castañer, Manuel
Author_Institution :
SSR Dept., Univ. Politec. de Madrid (UPM), Madrid, Spain
fDate :
7/4/1905 12:00:00 AM
Abstract :
In this letter, a dual circular polarized steering antenna for satellite communications in X-band is presented. This antenna consists of printed elements grouped in an array, able to work from 7.25 up to 8.4 GHz in both polarizations: left-handed circular polarization (LHCP) and right-handed circular polarization (RHCP). The module antenna is compact, with narrow beamwidth, and reaches a gain of 16 dBi. It has the capability to steer in elevation to ±10° and ±40° electronically with a Butler matrix. In order to reduce the mutual coupling between adjacent patches, electromagnetic band-gap (EBG) structures are introduced. These EBGs combine double-layer and edge location via in order to reduce the size, without changing the low-permittivity substrate, and therefore maintaining the high radiation efficiency of the antenna.
Keywords :
antenna radiation patterns; matrix algebra; photonic band gap; polarisation; satellite communication; Butler matrix; EBG; LHCP; RHCP; X-band; antenna radiation efficiency; double-layer location; dual circular polarized steering antenna; edge location; electromagnetic band-gap structures; left-handed circular polarization; low-permittivity substrate; module antenna; mutual coupling reduction; printed elements; right-handed circular polarization; satellite communications; Antenna measurements; Antennas; Arrays; Metamaterials; Mutual coupling; Periodic structures; Electromagnetic band-gap (EBG) materials; Steering antennas; mutual coupling reduction;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2012.2226013
