Effects of Ground Plane Size and Cavity Structure on the Microstrip Patch Antenna Built on a Low-permittivity Substrate with an Air Gap
- 발행기관 아주대학교
- 발행년도 2010
- 제출일 2010-06-01
- 학위수여년월 2010. 8
- 학위명 석사
- 학과 일반대학원 전자공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000010843
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
A thorough investigation of the effects of the ground plane size and the cavity structure on the characteristics of microstrip patch antennas built on a thin, low-permittivity substrate with an air gap was studied. Two microstrip patch antenna were chosen to study: the square microstrip patch antenna (narrow bandwidth) and the half E-shaped patch antenna (broad bandwidth). The studied antenna’s characteristics included the input impedance, gain, HPBW and the radiation patterns of the antennas. The results show that the gain in general was a periodic function of ground plane size, and the HPBW and radiation patterns of the antennas change in accordance with the variation in gain. The addition of the cavity structure can suppress the propagation of the surfaces waves and improve the gain of the antennas. The gain enhancement of 3 dB was accomplished and the maximum gain of 12 dB can be reached. The antennas with a folded cavity structure were also studied. It was demonstrated that by folding the metal plate of the cavity structure, the characteristics of the microstrip patch antennas did not change much whereas the height of the microstrip patch antennas can be reduced much.
more목차
Acknowledgement i
Abstract ii
Contents iii
List of Figures iv
Chapter 1. Introduction 1
Chapter 2. The effects of the ground plane size on a square microstrip patch antenna 3
Chapter 3. The effects of the cavity structure on a square microstrip patch antenna 15
Chapter 4. The effects of the folded cavity structure on a square microstrip patch antenna
24
Chapter 5. The effects of the ground plane size on a half e-shaped patch antenna 28
Chapter 6. The effects of the cavity structure on a half e-shaped patch antenna 39
Chapter 7. The effects of the folded cavity structure on a half e-shaped patch antenna 52
Chapter 8. Conclusion 60
List of References 61
