臺灣博碩士論文加值系統

本論文設計一應用於毫米波頻段的相位陣列天線子陣列模組。此天線模組將陣列天線與環行器作結合，透過與環行器的整合可提供兩個獨立的天線端埠，來實現用於發射和接收系統的自足獨立波束成形網路。為了消除相位陣列天線所產生的光柵波瓣，子陣列模組的輻射場型有經過適當的設計與調整。本論文其主要目標為用一組架構去將天線的收發路徑分開，避免訊號的互相干擾與延遲，其實現方式為將環行器與一組2×2串列式陣列天線結合，此架構為三層PCB板結構，下層為環行器，上層為天線，發射與接收訊號為同一組天線，並利用環行器的特性即可將天線的收發路徑分開，且利用三層板的結構，可以將整體的面積大幅縮小，可將此結構視為一模組，利於模組化。第二階段將此模組排列成1×8的陣列天線，每個模組為子陣列，可將每組模組輸入不同的相位來達到波束偏移的效果。透過量測驗證，此天線模組具有良好的輻射特性，增益為7.2dB，可應用於5G通訊系統中。

This paper presents the design of a subarray module for the implementation of phased array of antennas at millimeter wave frequency band. In particular, two antenna ports are created to provide the possibility of implementing self-sufficient independent beamforming networks for the transmitting and receiving systems by embedding a circulator. The radiation pattern of the module is properly designed to avoid the appearance of grating lobes in the formation of phased array of antennas.The radiation characteristics of both the subarray module and the phased array of antennas are examined by numerical simulation and experimental measurement over the antenna prototypes.

口試委員會審定書.....................................#
誌謝............................................... i
中文摘要............................................ ii
ABSTRACT ......................................... iii
目錄............................................... iv
圖目錄............................................. vi
表目錄............................................. ix
Chapter 1 論文內容介紹............................. 1
1.1 研究背景....................................... 1
1.2 論文貢獻....................................... 1
1.3 章節概緒....................................... 2
Chapter 2 環行器基本理論............................ 4
2.1 鐵氧體材料的基本介紹............................. 4
2.2 磁導係數張量.................................... 5
2.3 鐵氧體線寬...................................... 7
2.4 飽和磁化量與居禮溫度.............................. 8
2.5 電磁磁波在鐵氧體中的傳播特性........................ 9
2.6 鐵氧體環行器電磁場分析............................. 11
2.7 環行器之散射矩陣.................................. 13
Chapter 3 毫米波環行器設計............................ 16
3.1 鐵氧體材料的選擇.................................. 16
3.2 微帶線基本理論.................................... 17
3.3 毫米波微帶線環行器設計............................. 19
3.4 毫米波基板合成環行器設計............................ 24
3.4.1 基板合成波導理論................................. 24
3.4.2 基板合成波導環行器模擬結果........................ 26
3.4.3 基板合成波導環行器量測結果........................ 30
Chapter 4 串列式微帶陣列天線........................... 35
4.1 矩形微帶天線....................................... 35
4.1.1 矩形微帶天線設計................................. 36
4.1.2 矩形微帶天線模擬結果.............................. 38
4.2 陣列因子........................................... 39
4.3 2×2 串接式微帶陣列天線設計.......................... 42
4.4 三層板2×2 串接式微帶陣列天線........................ 49
Chapter 5 相位陣列天線模組............................57
5.1 天線收發系統...................................... 57
5.2 基板合成波導環行器與微帶陣列天線之整合............... 58
5.3 相位陣列天線模組量測結果............................ 63
5.4 1×8 高增益微帶陣列天線............................. 68
5.5 相位陣列天線之波束成形.............................. 74
Chapter 6 結論........................................ 76
參考文獻.............................................. 78

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