Reduction in Cross-Polarized Radiation of Microstrip Patches Using Geometry-Independent Resonant-Type Defected Ground Structure (DGS)

Author

Kumar, Chandrakanta ; Guha, Debatosh

Author_Institution

Dept. of Space, Gov. of India, Bangalore, India

Volume

63

Issue

6

fYear

2015

fDate

Jun-15

Firstpage

2767

Lastpage

2772

Abstract

A new method of suppressing cross-polarized (XP) radiation using resonant-type defected ground structure (R-DGS) on microstrip antenna has been proposed in this communication. A linearly shaped full wavelength R-DGS has been proposed and experimentally verified for different microstrip geometries. The design is supported by thorough investigations on the physical interaction between R-DGS and XP generating fields. Unlike previously explored nonresonant-type defects, this new approach is independent of patch geometry. A consistent suppression of the H-plane XP fields well below -30 dB for different patch geometries has been experimentally demonstrated.

Keywords

antenna radiation patterns; defected ground structures; microstrip antennas; H-plane XP fields; R-DGS; XP generating fields; cross-polarized radiation; geometry-independent resonant-type defected ground structure; linearly shaped full wavelength R-DGS; microstrip antenna; microstrip geometries; microstrip patches; patch geometry; resonant-type defected ground structure; Antenna measurements; Geometry; Microstrip; Microstrip antennas; Prototypes; Substrates; Cross-polarized (XP) radiation; cross-polarized radiation; defected ground structure; microstrip antenna;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2015.2414480

Filename

7063912