Effect of Partial Ground Plane Removal on the Radiation Characteristics of a Microstrip Antenna

Hong-Min Lee, Wong-Sang Choi

Department of Electronic Engineering, Kyonggi University, Suwon, South Korea.

DOI: 10.4236/wet.2013.41002                

Abstract

This study presents a new, simple method for reducing the back-lobe radiation of a microstrip antenna (MSA) by a partially removed ground plane of the antenna. The effect of the partial ground plane removal in different configurations on the radiation characteristics of a MSA are investigated numerically. The partial ground plane removal reduces the backlobe radiation of the MSA by suppressing the surface wave diffraction from the edges of the antenna ground plane. For further improving the front-to-back (F/B) ratio of the MSA, a new soft-surface configuration consisting of an array of stand-up split ring resonators (SRRs) are placed on a bare dielectric substrate near the two ground plane edges. Compared to the F/B ratio of a conventional MSA with a full ground plane of the same size, an improved F/B ratio of 9.7 dB has been achieved experimentally for our proposed MSA.

 

Keywords

Front-to-Back Ratio; Microstrip Antenna; Removed Ground Plane; Soft-Surface; Split Ring Resonator

Conflicts of Interest

The authors declare no conflicts of interest.

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