本研究包含兩項獨立研究主題。
第一部份為「圓極化自振式主動集成天線之實現」，其創新之處在於將自振式主動集成天線與圓極化天線整合，以解決當發射端與接收端面臨極化不匹配時所造成極化損失的問題。本研究提出兩款新穎的圓極化自振式主動集成天線，將交錯耦合對與回授元件整合後加入天線之輻射元件，其中，交錯耦合對能提供一組穩定的相位差與功率激發天線，在圓極化天線設計中可確保使相位固定與有效的輻射，其等效全向輻射功率最高可達 11 dBm 與 23.7% 的轉換效率，並且在主波束之xz平面與yz平面上分別可提供100度與70度之可用圓極化範圍。
第二部份為「毫米波車用雷達天線陣列設計」，此設計共包含 77 GHz 與 24 GHz 天線設計議題。其中，77 GHz天線在模擬與量測因素上會有較多的限制與不確定因素，故在此議題上會針對如何模擬軟體中得到更加精準的數值與環境的建置，並在實際量測架構上多加琢磨，以驗證天線模擬與實際量測之結果；24 GHz天線將針對車內天線應用，並解決其車內因波束指向非需要區域而導致硬體無法辨識問題。本天線之創新之處為利用一耦合元件，實現了增益提升與針對非必要角度之增益抑制的結果，最終滿足車內天線的應用。
本論文將詳細闡述兩大獨立研究主題，包含了其研究動機與設計理念，並從模擬與實際量測中建立比較，與說明模擬與量測數據的差異或一致性。

This thesis consists of two independent researches. In the first part, two different kinds of novel circularly polarized self-oscillating active integrated (CP−AIA) is proposed and demonstrated. For the first proposed design consists of a cross-coupled pair (XCP) oscillator and a monopole antenna, which use single excitation and an inverted L-shaped strip attached to one side of the ground plane to generate circularly polarized radiation. The second proposed design consists of a XCP oscillator and a ring slot antenna, which use two excitation with 90° phase difference to generate two orthogonal E-field to implement CP characteristic. These two fabricated antennas shows a stable oscillation at 916 MHz (monopole) and 912 MHz (ring-slot antenna) for ultra high frequency (UHF) radio frequency identification (RFID) applications. The measured highest proposed design DC-to-RF conversion efficiency is 23.7% and equivalent isotropically radiated power (EIRP) is 11 dBm, which can provide 100° and 70° 3 dB axial ratio (AR) beamwidth in two principle cuts.
In the second part, two designs of millimeter-wave (mm-wave) antenna array is studied. First, the 77 GHz antenna design with its process validation will be demonstrate in this thesis. All the simulation result is corresponded to the measurement result, which can verify the manufacture process. Second, the 24 GHz mm wave antenna design for automotive will discuss and design, a 2 × 2 antenna array and a novel coupled element for gain enhancement has been proposed in this design, which can improve the gain focus on the desire area and suppress the gain on the undesired area, compared with the array without coupled element, with a simple and low-profile coupling element can improve the peak gain at least 16.7%.

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