本論文係以一創新且簡易之量測方法分析反射式及穿透式兩種型態之注入鎖定振盪器，根據分析結果，將靈敏度較佳之穿透式注入鎖定振盪器設計為壓控振盪器並且使用市售鎖相迴路晶片作為解調電路，研製兩款具有高靈敏度且非接觸式之相位自我注入鎖定雷達系統。由於本論文欲探討提高注入訊號功率是否能再進一步改善雷達靈敏度，因此，兩款雷達差異於訊號接收路徑是否含有低雜訊放大器。接著以兩款雷達量測步進馬達以及人體，其解調之基頻訊號透過微控制器模組將類比訊號轉換為數位訊號，並且傳送至電腦做訊號處理。兩款雷達之量測結果將在論文內探討，並在最後提出優化雷達系統之建議。由於本論文所研製之雷達具有電路體積小、製造成本較低且擁有良好之靈敏度的特性，再加上微控制器模組能夠支援藍牙及wifi等無線通訊技術，可將量測之生理資訊上傳至雲端，未來可應用在居家照護物聯網感測器。

In this thesis, a novel measurement method is proposed to characterize transmission-type and reflection-type injection-locking oscillators (ILO), which are the kernel components of the self-injection-locked (SIL) radars. According to the results, the transmission-type ILO has a better sensitivity than that of reflection-type one. As the transmission-type ILO is integrated with a commercial phase-locked loop (PLL) chip, it can build up a phase- and self-injection-locked (PSIL) vital-sign radar sensor. Here, the PLL not only stabilizes the transmitting radio-frequency source, but also plays the role of the vital-sign demodulator. Two high-sensitivity and non-contact PSIL radars, which are with and without a low-noise amplifier in the receiving path, are developed in this thesis. Then, both two radars are evaluated by the metallic-plate variation and human chest physiological movement. The demodulated vital-sign signals will be converted into digital signals by the microcontroller module and sent into the computer for performing digital signal processing (DSP). Based on the measurement comparisons of the two radars, this thesis gives some further optimization strategies. The developed radars have the advantages of small circuit size, low fabrication cost, and high-sensitivity. In addition, since the microcontroller module, which is adopted in this thesis, supports wireless communication interfaces, such as Bluetooth and WIFI, the vital signs can be sent to the cloud for internet of thing (IoT) applications.

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