本論文提出一種利用表面聲波濾波器和功率檢測器的頻率解調器取代頻率鑑別器，其具有低成本且小尺寸的優勢。將該解調器操作於2.36至2.39 GHz的醫療身體感測網路(medical body area network, MBAN)頻段並結合自我注入鎖定振盪器(self-injection-locked oscillator, SILO)進行生命徵象感測。首先藉由模擬軟體和訊號產生器證明該系統架構之可行性，並提出曲線擬合方式還原頻率之變化；接著是致動器以及人體量測實驗，由致動器擺動和人體呼吸運動產生的都卜勒位移，進入頻率解調機制和訊號處理後得到待測物之移動軌跡。

This paper proposes a frequency demodulator using surface acoustic wave filter and power detector to replace the frequency discriminator, which has the advantages of low cost and small size. The demodulator is operated in the 2.36 to 2.39 GHz medical body area network (MBAN) frequency band and combined with a self-injection-locked oscillator (SILO) for vital sign sensing. First, the feasibility of the system architecture is proved by simulation software and signal generator, and a curve fitting method is proposed to restore the frequency change; then the actuator and the human body measurement experiment are generated by the swing of the actuator and the breathing motion of the human body. Doppler displacement enters the frequency demodulation mechanism and signal processing to obtain the moving trajectory of the object under test.

論文審定書………………………………………………………………...…...i
論文公開授權書…………………………………………………………...…..ii
誌謝…………………………………………………………………………….iii
摘要…………………………………………………………………………….iv
Abstract…………………………………………………………………………v
目錄…………………………………………………………….………………vi
圖次……………………………………………………………….…………..viii
表次……………………………………………………………….…………...xii
第一章 序論…………………………………………………………………....1
1.1研究背景……….......................................................................................1
1.2非同調頻率解調器...................................................................................3
1.2.1頻率鑑別器……………………………………………………................3
1.2.2鎖相迴路……………………………………...………............………….4
1.2.3微分器....………………………………………………………................5
1.3章節規劃...................................................................................................5
第二章 雷達系統…………………………….................................................6
2.1整體架構…...............................................................................................6
2.2頻率解調器製作......................................................................................10
2.2.1橢圓濾波器……………………………………………………...............10
2.2.2表面聲波濾波器...................................................................................14
2.2.3功率檢測器…………………………………………………............…...16
2.3曲線擬合..................................................................................................21
2.4頻率鑑別器…….......................................................................................27
第三章 生命徵象感測實驗…………………………………………………..30
3.1致動器量測..............................................................................................30
3.1.1實驗架構…………………………………………………....…………...30
3.1.2零點偵測………………………………………………....……………...32
3.1.3動態範圍偵測………………………………………....………………...39
3.2人體量測……..........................................................................................41
第四章 結論與未來展望……………………………………………………..46
參考文獻………………………………………………………………………47

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