Wideband Circularly Polarized Resonant Cavity Antenna using Crossed Bowtie Dipole and Single Dielectric Superstrate
Wideband Circularly Polarized Resonant Cavity Antenna using Crossed Bowtie Dipole and Single Dielectric Superstrate
- 주제(키워드) circularly polarized , high gain , widenand , widebad , dielectric slab , half-warelength , resonant cavity antenna
- 발행기관 아주대학교
- 지도교수 Ikmo Park
- 발행년도 2015
- 학위수여년월 2015. 8
- 학위명 석사
- 학과 및 전공 일반대학원 전자공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000020483
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
A broadband resonant cavity antenna with circular polarization (CP) and high gain characteristics is presented. Its primary radiator comprises of two bowtie dipoles, which are arranged orthogonally and then incorporated with double vacant printed rings to generate wideband CP radiation. A half-wavelength planar partially reflecting surface is utilized to achieve high-gain broadside radiation, and wide axial ratio (AR) as well as gain bandwidths. The antenna with an overall size of approximately 2?? × 2?? × 0.7?? at 7.4 GHz yields measured ?10-dB impedance and 3-dB AR bandwidths of 40% and 25.6%, respectively. Experimental results also showed an average gain of 14.5 dBic over the CP operating bandwidth and a 3-dB gain bandwidth of 42.7% (5.7?8.8 GHz).
more목차
Abstract i
Contents ii
List of Figures iii
List of Tables v
Chapter 1. Introduction 1
Chapter 2. Wideband CP radiator 4
2.1 Antenna configuration 4
2.2 Antenna analysis and parametric discussion 6
Chapter 3. Wideband PRS design 14
Chapter 4. Wideband, high gain CP antenna 17
4.1 Antenna geometry 17
4.2 Effect of the superstrate thickness 19
4.3 Effect of the cavity height 23
4.4 Effect of superstrate lateral size 25
4.5 Effect of primary source position 29
Chapter 5. Measurement results 31
Chapter 6. Conclusion 37
References 38
Author’s publications 41
