Improved Cross-Polarization Characteristics of Circular Microstrip Antenna Employing Arc-Shaped Defected Ground Structure (DGS)

Guha, D. ; Kumar, C. ; Pal, S. (2009) Improved Cross-Polarization Characteristics of Circular Microstrip Antenna Employing Arc-Shaped Defected Ground Structure (DGS) IEEE Antennas and Wireless Propagation Letters, 8 . pp. 1367-1369. ISSN 1536-1225

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Official URL: http://doi.org/10.1109/LAWP.2009.2039462

Related URL: http://dx.doi.org/10.1109/LAWP.2009.2039462

Abstract

Application of defected ground structure (DGS) to suppress cross-polarized (XP) radiation from a microstrip patch antenna has been reinvestigated using a new DGS geometry for much improved characteristics. Arc-shaped defect has been used in pair, symmetrically located under a circular patch. A number of optimization parameters have been examined using simulated results, leading to a design indicating improved XP behavior. A set of identical prototypes, with and without DGS, have been experimentally studied. The presence of the DGS shows as much as 30 dB isolation of the XP level from its peak radiation, and that compared to an identical patch without DGS indicates an improvement by as much as 12 dB. The relative suppression in XP values are found to be around 7-12 dB over ±75° elevation around the boresight of the patch.

Item Type:Article
Source:Copyright of this article belongs to Institute of Electrical and Electronics Engineers.
Keywords:Cross-polarized (Xp) Radiation; Defected Ground Plane; Defected Ground Structure (Dgs); Microstrip Antenna.
ID Code:117274
Deposited On:22 Apr 2021 11:43
Last Modified:22 Apr 2021 11:43

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