CST – Computer Simulation Technology

Mutual Coupling Reduction Using EBG in Steering Antennas

Title:
Mutual Coupling Reduction Using EBG in Steering Antennas
Author(s):
Gonzalo Expósito-Domínguez, José-Manuel Fernández-Gonzalez, Pablo Padilla, Manuel Sierra-Castañer
Source:
IEEE Antennas and Wireless Propagation Letters
Vol./Issue/Date:
Volume: 11, 2012
Year:
2012
Page(s):
1265 - 1268
Keywords:
Electromagnetic band-gap (EBG) materials, mutual coupling reduction, Steering antennas
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 and 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.
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