Circular Polarization Circular Microstrip Antenna using the Perturbation Effect

Perturbation 효과를 이용한 원편파 원형 마이크로스트립 안테나

  • Ryu, Mi-Ra (Electronic Information Communication Engineering, Konkuk University) ;
  • Woo, Jong-Myung (Dept. of Radio-science & Engineering, Chungnam National University) ;
  • Hur, Jung (Electronic Information Communication Engineering, Konkuk University)
  • 류미라 (건국대학교 전자정보통신공학과) ;
  • 우종명 (충남대학교 전파공학과) ;
  • 허정 (건국대학교 전자정보통신공학과)
  • Published : 2005.11.05

Abstract

This paper presents the design of linear and circular polarization baseball- shaped circular microstrip antenna (BCMA) with 3-dimensional structure using perturbation effect to reduce its size, which runs at 1.575GHz frequency bandwidth. As a result, the size of linear polarized antenna could be reduced up to 23.7% in patch diameter and 41.8% in its area. Linear polarized antenna has -26.04dB of return loss, 69MHz(4.38%) of -l0dB bandwidth, 4.51dBd of gain, and its -3dB beamwidth are 99$^{\circ}$ in E-plane, 83$^{\circ}$ in H-plane. Circular polarized antenna has -17.43dB of return loss, 113.7MHz(7.2%) of -l0dB bandwidth, 2dBd of gain, 2dB of axial ratio and its -3dB beamwidth are 87$^{\circ}$, 86$^{\circ}$ x-axis polarized, 80$^{\circ}$, 84$^{\circ}$ y-axis polarized. It has 82mm of diameter, which is 28.5% of linear polarized CMPA. Therefore, in this paper we verified that baseball-shaped 3-dimensional structure of circular microstrip patch antenna applied with perturbation effect is appropriate for miniaturization.

Keywords

perturbation;3-dimensional structure;baseball-shaped;circular antenna;GPS