Title :
New defected ground structures (DGSs) to reduce cross-polarized radiation of circular microstrip antennas
Author :
Kumar, C. ; Guha, D.
Author_Institution :
Commun. Syst. Group, ISRO Satellite Centre, Bangalore, India
Abstract :
In this paper, suppression of cross-polarized (XP) radiation of a circular microstrip patch antenna (CMPA) employing two new geometries of defected ground structures (DGSs), is experimentally investigated. One of the antennas employs a circular ring shaped defect in the ground plane, located bit away from the edge of the patch. This structure provides an improvement of XP level by 5 to 7 dB compared to an identical patch with normal ground plane. The second structure incorporates two arc-shaped DGSs in the H-plane of the patch. This configuration improves the XP radiation by about 7 to 12 dB over and above a normal CMPA. For demonstration of the concept, a set of prototypes have been examined at C-band. The experimental results have been presented.
Keywords :
antenna feeds; antenna radiation patterns; defected ground structures; microstrip antennas; DGS; circular microstrip antennas; cross-polarized radiation; defected ground structures; single-fed microstrip patch; Airports; Artificial satellites; Communication systems; Fabrication; Frequency diversity; Geometry; Microstrip antennas; Patch antennas; Polarization; Satellite broadcasting;
Conference_Titel :
Applied Electromagnetics Conference (AEMC), 2009
Conference_Location :
Kolkata
Print_ISBN :
978-1-4244-4818-0
DOI :
10.1109/AEMC.2009.5430671
