Design of a Planar Wide-Gain-Bandwidth Metasurface Antenna at Terahertz Frequency
Design of a Planar Wide-Gain-Bandwidth Metasurface Antenna at Terahertz Frequency
- 주제(키워드) Metasurface Antennas , Terahertz Antennas , Wide-Gain-Bandwidth
- 발행기관 아주대학교
- 지도교수 Ikmo Park
- 발행년도 2017
- 학위수여년월 2017. 8
- 학위명 석사
- 학과 및 전공 일반대학원 전자공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000025468
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
The design of a planar wide-gain-bandwidth metasurface antenna at terahertz frequency have been presented. The proposed antenna comprised of a square patch metasurface and a planar feeding structure, both of which were etched on an electrically thin, high-permittivity GaAs substrate. The antenna with a single feeding structure showed a maximum broadside gain of 9.8 dBi, a radiation efficiency of 69%, and a 3-dB gain bandwidth of 16%. The antenna gain performance was significantly improved by exciting the antenna with an array of slit feeding and without changing the antenna size. The antenna with a multiple (five) feeding structure showed a gain of 15.5 dBi, with improved 3-dB gain bandwidth and radiation efficiency. This antenna achieved a huge size reduction while achieving a comparable gain with the lens-coupled antenna. Moreover, the antenna performed as Fabry-Perot antenna exhibiting, high gain and directivity at higher values of substrate thickness (H=160 µm and H=80 µm), while behaved as metasurface antenna with wide-gain bandwidth at a lower thickness of the substrate (H=40 µm and H=20 µm). The antenna gain can be linearly increased by increasing patch cells using multiple-feeding, and we can achieve useful antenna characteristics by a combination of patch number and different values of substrate thickness.
more목차
Chapter 1. Introduction
Chapter 2. Planar Wide-Gain-Bandwidth metasurface antenna
2.1 Antenna configuration
2.2 Antenna analysis and parametric discussion
2.3 Optimum antenna performance
Chapter 3. Multiple-Feed Wide-Gain-Bandwidth metasurface antenna
3.1 Antenna configuration
3.2 Antenna characteristics
Chapter 4. Performance comparison of the single-feed antenna for different values of substrate thickness
4.1 Antenna configuration and characteristics
Chapter 5. Performance of the Multiple-Feed antenna with different numbers of patch cells at different substrate thickness
5.1 Antenna configuration
5.2 Antenna characteristics
Chapter 6. Conclusion
References 45
Author’s publications 49
