volume | PIER Journals

2019-01-03

Surface Wave Suppression in LHCP Microstrip Patch Antenna Embedded on Textured PIN Subsrtate

Manidipa Roy,

Dr. Manidipa Roy

Department of Electronics and Communication Engineering

ABESEC

India

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Ashok Mittal

Dr. Ashok Mittal

Department of Electronics & Communication Engineering

Ambedkar Institute for Advanced Communication Technology & Research

India

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Progress In Electromagnetics Research C, Vol. 89, 171-180, 2019

doi:10.2528/PIERC18072802

Abstract

Propagation of surface waves in dielectric underneath a microstrip patch antenna poses serious hindrance to the radiation mechanism. Several methods are being tried for suppression of surface wave. Metamaterial substrate is presented here with periodic arrangement of metallic cylindrical pins except the area underneath the radiating microstrip patch. The periodic arrangement of metallic cylindrical pins with negative dielectric constant has considerably high reflection coefficient to drive the extraneous surface wave fields towards the fringing fields of the antenna. The textured pin substrate leads to generation of forbidden band gap for the propagation of TM₀ surface wave modes and thus enhances radiation characteristics. The proposed structure proves to be highly beneficial for improving radiation efficiency and gain. Parametric analysis has also been presented for the gain enhancement by varying pin diameter, spacing between pins, and air gap between dielectric substrates. A uniform gain of 10 dB has been achieved for a Left Hand Circularly Polarized (LHCP) microstrip patch antenna. The axial ratio achieved in the described band is 200 MHz. The antenna has been designed for WLAN applications.

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Manidipa Roy, and Ashok Mittal, "Surface Wave Suppression in LHCP Microstrip Patch Antenna Embedded on Textured PIN Subsrtate," Progress In Electromagnetics Research C, Vol. 89, 171-180, 2019.
doi:10.2528/PIERC18072802

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