Title :
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
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;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2015.2414480
