In this thesis, we demonstrate two kinds of millimeter-wave (mmW) antennas in the 38 GHz and 60 GHz bands for the development of the fifth-generation (5G) mobile communications. In the beginning, antenna-on-chip (AoC) and antenna-in-package (AiP) which integrate RF circuits with antennas in mmW band are compared and discussed, where AiP is adopted because of the antenna efficiency.

In the 38 GHz part, a mmW quasi-Yagi antenna on standard printed circuit board (PCB) is proposed, combining with the wire-bonding technology to integrate the antenna with the RF chip. The proposed antenna has several features, including broadband, unidirectional pattern, high gain, and high efficiency, which is especially suitable for 5G mobile communication applications. In the 60 GHz part, an AiP module for short range radar applications is presented, using grounded coplanar waveguide (GCPW) feed, and combined with resonant cavity-backed design. In order to integrate the antenna and the mmW radar chip, the flip-chip packaging is introduced to achieve a compact multi-channel multi-antenna radar module, which consists of 1-Tx and 2-Rx. The contents of the thesis cover the literature survey, the design configuration, the radiation mechanism, simulated results, and measured S-parameters and radiation patterns.
口試委員會審定書 i
誌謝 ii
中文摘要 iii
ABSTRACT iv
CONTENTS v
LIST OF FIGURES vii
LIST OF TABLES xv
Chapter 1 Introduction 1
1.1 Research Motivation 1
1.2 Organization of the Thesis 3
Chapter 2 A 38-GHz Quasi-Yagi Antenna for 5G Mobile Communications 5
2.1 Introduction and Literature Survey 5
2.2 Antenna Design and Configuration 6
2.2.1 Element Design of Quasi-Yagi Antenna 6
2.2.2 1 by 4 Antenna Array Design 15
2.2.3 1 by 8 Antenna Array Design 27
2.3 Implementation and Measurement 38
2.3.1 1 by 4 Antenna Array Design 38
2.3.2 1 by 8 Antenna Array Design 49
2.4 Summary 58
Chapter 3 A 60-GHz Aperture Antenna with Cavity-Backed Design for Radar Applications 60
3.1 Introduction and Literature Survey 60
3.2 Antenna Design and Configuration 61
3.2.1 Overview of Packaging Configuration 61
3.2.2 Element Design of Cavity-Backed Aperture Antenna 64
3.2.3 Antenna-in-Package Design for 1T2R Radar 73
3.3 Implementation and Measurement 86
3.3.1 Measurement Setup 86
3.3.2 Measurement Results 88
3.4 Summary 91
Chapter 4 Enhanced Design with Stable Radiation Pattern for 60-GHz Radar Applications 93
4.1 Introduction 93
4.2 Enhanced Design and Configuration 94
4.2.1 Aperture Design for Radiation Patterns 94
4.2.2 Feeding Design for Impedance Matching 105
4.2.3 Optimal Integrated Design for 1T2R Radar 118
4.3 Simulation Results 124
4.3.1 Transmission Structure from RF chip to Antenna 124
4.3.2 Final Design of Antenna-in-Package for 1T2R Radar 126
4.4 Summary 142
Chapter 5 Conclusion 144
REFERENCES 146
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