밀리미터대역 시스템을 위한 새로운 평면구조의 엔드파이어 비아 안테나 설계
A Novel Planar End-Fire Via Antenna for Millimeter-Wave Systems
- 주제(키워드) Millimeter-wave , end-fire antenna , circular polarization , via.
- 발행기관 아주대학교
- 지도교수 감동근
- 발행년도 2017
- 학위수여년월 2017. 2
- 학위명 석사
- 학과 및 전공 일반대학원 전자공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000024354
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Starting with smartphones, mobile data traffic has exploded and is expected to continue to increase in the future. Therefore, studies on the millimeter wave band as the next generation communication are proceeding. The millimeter wave is particularly notable because it has a wider bandwidth than the currently used bandwidth and can implement phased array antenna in a relatively small space. Conventional end-fire antennas used in the millimeter wave have disadvantages that they have a length of more than half wavelength and are difficult to implement circularly polarized waves. Therefore, an end-fire antenna having a shorter length is required, and research on an end-fire circularly polarized antenna is particularly important. This paper proposed a novel planar end-fire antenna that has a shorter length than conventional end-fire antenna by using long vias. Also, end-fire circularly polarized via antenna is realized by changing feeding position of via antenna. Since it is difficult to measure the antenna gain in millimeter-wave band in Korea, the research have studied at 10 GHz instead of millimeter wave. The proposed antenna uses three long vias on a FR-4〖(ε〗_r=4.05) substrate with a height corresponding to half wavelength of the resonant frequency. The proposed antenna has the impedance bandwidth of 15.6% at 9.5 GHz to 11 GHz and shows an antenna gain of 5.19 dBi. The end-fire circularly polarized antenna implemented by changing feeding position has a 3 dB axial ratio bandwidth of 5.29% at 9.76 GHz to 10.29 GHz and shows a circularly polarized antenna gain is 3.88 dBic. Also, This paper propose a circularly polarized antenna using dual feeds and propose a superstrate and parasitic patch method for gain improvement.
more목차
Abstract
Table of Contents
List of Figures
Chapter 1. Introduction 1
Chapter 2. End-Fire Linearly Polarized Via Antennas 5
2.1. Linearly Polarized Halved Via Antenna 5
2.2. Simulation Results of the Halved Via Antenna 6
2.3. Linearly Polarized Whole Via Antenna 10
2.4. Simulation Results of the Whole Via Antenna 10
2.5. Phased Array of the Whole Via antenna 14
2.6. Simulation Results of the Proposed Phased Array 15
Chapter 3. End-Fire Circularly Polarized Via antennas 19
3.1. Circularly Polarized Antennas 19
3.2. Single Feed Type 21
3.2.1. Circularly Polarized Halved Via Antenna 21
3.2.2. Simulation Results of the CP Halved Via Antenna 23
3.2.3. Circularly Polarized Whole Via Antenna 27
3.2.4. Simulation Results of the CP Whole Via Antenna 28
3.3. Dual Feed Type 31
3.3.1. Circularly Polarized Whole Via Antenna 31
3.3.2. Simulation Results of the CP Whole Via Antenna 32
Chapter 4. Applications of the Whole Via Antenna 35
4.1. Superstrate for High Gain 35
4.1.1. Superstrate of the LP Whole Via Antenna 35
4.1.2. Superstrate of the CP Whole Via antenna 37
4.2. Parasitic Via for High Gain 42
Chapter 5. Conclusion 45
Publications 47
References 48
