本論文包含兩項獨立研究主題。第一部份為「可重置耦合器」。首先，本論文先提出兩款複合式雙模態合成傳輸線，並引入變容二極體做為調整機制，藉由施加不同之逆向偏壓，可使該傳輸線段，於單一操作頻率下，表現為兩種迥異之特徵阻抗及電氣長度，並且維持良好之匹配與傳輸特性。接著，吾人以此兩種雙模態合成傳輸線作特殊組合，其能於單一操作頻率下，實現枝幹耦合器模態與鼠競耦合器模態之任意變換，其具備同相/反相之輸出相位選擇。
第二部份為「毫米波天線陣列設計」，共設計兩款應用於毫米波頻段之天線陣列，第一款天線陣列，其天線陣列輻射場型為高增益與高指向性，利用其天線陣列特性，負責偵測正前方之物體；另一款天線陣列，具有寬波束寬與低損耗之優點，透過此天線陣列特性，將其優點利用於偵測左右兩側之物體。故，吾人設計一款混合天線陣列，透過兩款天線陣列的場型搭配，其可大幅提升此陣列系統之可掃描水平寬度，適用於自動駕駛系統之盲點偵測應用。

his thesis consists of two independent researches. In the first part, a reconfigurable hybrid coupler, capable of switching its topology as branch-line or rat-race coupler at single frequency, is proposed and demonstrated. The core building block is the phase reconfigurable synthesized transmission line (PRSTL) whose electrical length can be switched between two states as a 1-bit phase shifter. The PRSTLs were then combined with the tunable right-handed T-section to electrically control the characteristic impedance as well as the phase of each branches of the hybrid coupler. The measured results of the proposed couplers show an acceptable insertion loss and good output phase responses in both operating states.
Secondly, a design of millimeter wave antenna array is studied. To widen the coverage of the system, a combination array is adopted. One array feature the high gain and high directivity characteristics, which can be utilized to detect a long distance in front. On the other hand, another antenna array with the merits widebeam radiation pattern and low loss property is selected for detecting the items where are on both side. By utilizing the dual antenna arrays, the detectable range in the horizontal plane of the system can be improved significantly. It is applied for the system of self-driving and spot detection.

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