本論文提出了一款2 × 2平面波束掃描陣列天線系統。此系統以三層金屬層的方式實現之，最底層為相移饋入網路系統，第二層為孔徑耦合層，而第三層則為天線輻射體層。
首先，本論文以集總等效電路模型之形式，介紹右手合成傳輸線以及左手合成傳輸線之電氣響應，並以相位可重置合成傳輸線為基礎，提出連續相位可調合成傳輸線，該傳輸線係以線電感以及變容器組合成左右手合成傳輸線。該合成傳輸線操作於特定電壓時，可提供特定電容值，使該合成傳輸線於特定頻率具有一定的相位延遲或是相位領先，此特性將為構成2 × 2平面波束掃描陣列天線系統之主要核心元件。
而後，為了讓各天線間產生漸變相移量，將兩款相位可調合成傳輸線連接T型不等分功率分波器完成一相移饋入網路系統，而T型不等分功率分波器是為了補償傳輸路徑相移器個數不同所造成的損耗，其實測電氣響應將符合天線陣列主波束切換所需的相位。
再者，將相移饋入網路系統與孔徑饋入貼片天線作整合，將前述相移饋入網路系統之操作電壓一一紀錄之，利用所紀錄之電壓，經輻射場型之實驗量測，驗證其工作電壓是否具有之波束掃描系統之能力。
最後，此陣列天線最大的優勢即為使用三個相移器便可達成二維波束掃描，大大的減少了昂貴的相移器使用個數，而缺點則是需要犧牲些許的頻寬，由於各天線單元間經過相移器個數不同的緣故。
本論文詳盡討論此系統架構之設計概念、電路佈局，模擬與量測結果之比較，並進行分析與討論。

A novel 2 × 2 planar beam scanning array antenna system is proposed in this thesis. This system is implemented in the form of three metal layers using two dielectric substrates with air gap in-between. The bottom layer is the phase-shift feeding network system, the second layer is the aperture coupling layer, and the third layer is the antenna radiator layer.
First, the electrical response of the right-handed synthesized transmission line and the left-handed synthesized transmission line in the form of a lumped equivalent circuit model is introduced. Based on the reconfigurable synthesized transmission line, a continuous-phase adjustable synthesized transmission line is proposed. The synthesized line comprises quasi-lumped line inductors and varactors. By properly selecting the bias voltage of the varactors, the synthesized transmission line can have a phase delay or phase advance at the center frequency. This characteristic will be the cornerstone of the 2 × 2 planar beam scanning array antenna system.
Then, in order to produce progressive phase shift between antennas, synthesized transmission lines are connected to T-junctions to fulfill the phase shift feeding network. The T-junction has unequal power splitters to compensate for the variation of loss due to different number of phase shifters in each path. The measured electrical response matches the predication.
Furthermore, the phase shift feeding network and the aperture coupling patch antenna array are integrated to validate the main beam scanning capability by experiments. The advantage of the proposed array antenna relies on achieving two-dimensional beam scanning capability merely with three low-cost phase shifters with synthesized lines, which greatly reduces overall fabrication cost. Nonetheless, this is fulfilled at the expense of somewhat sacrificing operational bandwidth because of the number of phase shifters between antenna units is different.

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