本論文提出單頻雙模態相位陣列天線系統之整合創新。有別於本團隊過去研究之雙頻雙模態整合相位陣列，該新款設計利用特定工作電壓分別操作為信號回溯陣列及波束切換陣列，以減輕實際應用之系統成本。其主要餽入網路之核心設計乃引入變容器，切換電壓使兩系統可在相同頻率相互結合。
為實現該單頻雙模態相位陣列系統，本論文提出二款可重置合成傳輸線。該合成傳輸線係以線電感、平行板電容與以變容器實現之可重置串聯LC諧振器所組成。該可重置串聯LC諧振器操作於特定電壓時，或可提供特定之電容值，使合成傳輸線於特定頻率具有傳輸線特性，或可使之共振產生虛接地，使合成傳輸線於相同頻率具有開路輸入阻抗，以自動隱暱系統之特定電路區塊。此獨特特性乃為構成單頻雙模態陣列操作之主要核心。
將兩款可重置合成傳輸線進行延伸，吾人成功實現整合陣列餽入網路之核心元件：單頻雙模態枝幹耦合器、單頻雙模態交叉跨線及單刀雙擲開關。將餽入電路與天線、增益放大器、環路器等進行整合，即完成該單頻雙模態相位陣列之完整系統。經輻射場型之實驗量測，充分驗證其工作電壓可切換信號回溯與波束切換系統之能力。
再者，本論文將相系統與二位元及四位元相移鍵控調變器整合，於反射式信號回溯陣列注入調變機制，實現及驗證此單頻雙模態相位陣列傳輸資料應用之可行性。
本論文詳盡討論此創新系統架構之設計概念、電路佈局，及模擬與量測結果，並進行適當分析討論。

A novel single-band integration of dual-mode retrodirective/beam-switching phased array is proposed in this thesis. Different form previous dual-band ones, the proposed system is capable of functioning as a reflection-type retrodirective array or beam-switching array at a single frequency. By incorporating varactors into the feeding network, the two array systems can be integrated as a whole at a common frequency by simply controlling the bias voltage.
The key innovation to fulfill the design is the reconfigurable synthesized line, whose transmission characteristics are controlled by a varactor diode. The synthesized line comprises quasi-lumped line inductor, parallel-plate capacitor and an LC resonator. The varactor diode is embedded in the LC tank for reconfigurability. By properly selecting the bias voltage of the varactor, the LC resonator functions as either an equivalent capacitor to establish a transmission path, or a virtual short circuit to make a part of the network become completely invisible to the signal flow.
By utilizing the reconfigurable synthesized line, core components including the single-band dual-mode branch-line coupler, single-band dual-mode crossover and SPDT switch are successfully developed. The single-band dual-mode array, realized by integrating couplers with auxiliary components, is validated by experiments.
Furthermore, the aforementioned phased array is directly integrated with binary and quadrature phase shift keying (BPSK/QPSK) modulators to prove the feasibility of data transmission when operated as the retrodirective array.

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