本論文提出一具新穎性且低成本的電控式波束可重置的陣列天線架構，可配合應用情境變化而動態調整涵蓋範圍並具抗干擾特性。利用行波天線的設計方式，藉傳輸線本身具有的相位特性，毋須改變傳輸線結構，只需調整單元天線在傳輸結構的位置，便能得到所需的相位差，再搭配射頻二極體開關設計，可以電控方式開啟或關閉單元天線，達到波束切換的功能。而行波天線本身具有頻率掃描的特性，不但在特定頻率下的有主波束切換功能，亦可藉頻率變動提供對應的細部場型微調，增加應用的彈性。此外本研究也針對行波陣列天線的末端結構，提出一有效利用能量的設計方式，提高陣列天線的輻射效率。
以此概念為基礎，本論文分成三個部分，第一部分描述如何實現波束可切換的串列式槽孔陣列天線架構，並以實作方式驗證之；第二部分提出一款可應用於室內小型基地台的雙頻雙極化波束切換陣列天線，並討論不同的饋入結構末端對陣列天線的性能影響，以及此架構可能具有的極化控制方式；而第三部分則為先行研究，提出一款具有豐富場型多樣性的波束切換陣列天線設計，屬於智慧型天線的範疇，在不同的單元天線排列間距下，控制個別單元天線的開關狀態，搭配波束合成計算方法作為核心，可快速建立操作模式與對應場型的資料庫，值得進一步研究。

A novel electronically reconfigurable beam switching antenna array type is proposed in this work. With the serial feed configuration, the specific length of transmission line can provide the corresponding phase difference at the ends. Locations of antenna elements on the transmission line can be designed to excite desired phase differences. With elements adjustable via RF switches, the main beam direction can be reconfigured with different combinations of switches.
Based on aforementioned concept, the thesis is divided into three sections. The first part describes how to implement the array architecture, and the method that verify its performance. The second part is a dual band/dual polarization reconfigurable array design for small cells. The performances with the different feeding and terminating schemes, as well as polarization control methods are discussed. The third part is a pilot study, a novel array design to facilitate various radiation patterns is presented. With the efficient method to synthesize radiation patterns based on the antenna array theory, the corresponding excitation state of elements can be determined. A database is established to provide a beam or a null scanning feature with this array antenna.
A novel electronically reconfigurable beam switching antenna array type is proposed in this work. With the serial feed configuration, the specific length of transmission line can provide the corresponding phase difference at the ends. Locations of antenna elements on the transmission line can be designed to excite desired phase differences. With elements adjustable via RF switches, the main beam direction can be reconfigured with different combinations of switches.
Based on aforementioned concept, the thesis is divided into three sections. The first part describes how to implement the array architecture, and the method that verify its performance. The second part is a dual band/dual polarization reconfigurable array design for small cells. The performances with the different feeding and terminating schemes, as well as polarization control methods are discussed. The third part is a pilot study, a novel array design to facilitate various radiation patterns is presented. With the efficient method to synthesize radiation patterns based on the antenna array theory, the corresponding excitation state of elements can be determined. A database is established to provide a beam or a null scanning feature with this array antenna.

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