本論文使用整合自我注入鎖定技術與高增益天線，提出操作於高頻與特高頻頻段的外差式自我注入鎖定雷達。藉由此種方式使發射訊號操作於高頻頻段時，振盪器可以操作於微波頻段而擁有較大的鎖定範圍。對於SIL雷達自我注入鎖定所造成的相位轉頻率調變能提供額外的訊雜比增益。這使得此架構可以藉由提升頻率來更有效地改善SIL雷達系統靈敏度。較於傳統雷達系統，能有效改善靈敏度、降低雜波與周遭環境之干擾、以及降低成本。
本論文藉由此架構將振盪器輸出之900 MHz訊號降頻至30 MHz的高頻訊號或150 MHz的特高頻訊號，以偵測遠距離目標。並藉由將包含都普勒相位資訊的接收訊號升頻並注入回振盪器，以保持利用高頻 SILO 的靈敏度來提高系統的訊雜比。並藉由雷達系統的子電路測試、連續波模式的閉迴路系統測試與開迴路目標物偵測，驗證該雷達系統能得到正確的都普勒資訊。

This paper presents a heterodyne radar system operating in the high-frequency(HF)and very high-frequency(VHF)bands, integrating self-injection locking(SIL)technology with high-gain antennas. By employing this method, when the transmitted signal operates in the HF band, the oscillator can operate in the microwave band, offering a larger locking range. The phase-to-frequency modulation caused by self-injection locking in the SIL radar provides additional signal-to-noise ratio(SNR)gain. This allows the system to effectively improve the sensitivity of the SIL radar by increasing the frequency. Compared to traditional radar systems, this architecture enhances sensitivity, reduces clutter and environmental interference, and lowers costs.
In this paper, the oscillator output signal of 900 MHz is down-converted to 30 MHz(HF signal)or 150 MHz(VHF signal)to detect distant targets. The received signal, containing Doppler phase information, is up-converted and reinjected into the oscillator to maintain the sensitivity advantage provided by the high-frequency SILO, thereby improving the system's SNR. Through sub-circuit tests of the radar system, closed-loop system tests in continuous-wave mode, and open-loop target detection, the radar system is validated to correctly obtain Doppler information.

論文審定書..................................................................................................................................................i
誌謝..............................................................................................................................................................ii
摘要..............................................................................................................................................................iv
Abstract........................................................................................................................................................v
目錄..............................................................................................................................................................vi
圖次..............................................................................................................................................................ix
表次..............................................................................................................................................................xi
第一章 序論................................................................................................................................................. 1
1.1研究背景與動機.....................................................................................................................................1
1.2雷達介紹.................................................................................................................................................2
1.2.1都普勒雷達..........................................................................................................................................2
1.2.2高頻雷達..............................................................................................................................................3
1.2.3特高頻雷達..........................................................................................................................................5
1.3章節規劃.................................................................................................................................................7
第二章 雷達系統架構的原理與驗證.........................................................................................................9
2.1 自我注入鎖定雷達................................................................................................................................9
2.1.1自我注入定技術原理..........................................................................................................................9
2.2外差式自我注入雷達系統介紹.............................................................................................................11
2.3元件參數.................................................................................................................................................14
2.3.1 DDS介紹..............................................................................................................................................17
2.3.2頻率解調器介紹..................................................................................................................................20
2.4系統閉迴路測試.....................................................................................................................................21
2.4.1子系統量測..........................................................................................................................................21
2.4.2 連續波模式測試.................................................................................................................................27
第三章 雷達系統的戶外量測.....................................................................................................................30
3.1實驗設置.................................................................................................................................................30
3.1.1測試場地介紹......................................................................................................................................30
3.1.2系統設置..............................................................................................................................................31
3.2 PAC-12 HF ANTENNA之偵測結果..........................................................................................................33
3.2.1 PAC-12 HF antenna改良與性能測試.................................................................................................33
3.2.2 使用PAC-12 HF antenna於系統的偵測實驗.....................................................................................37
3.3 YAGI-UDA ANTENNA之偵測結果...........................................................................................................42
3.3.1 Yagi-Uda antenna性能測試................................................................................................................42
3.3.2使用Yagi-Uda antenna於系統偵測汽車.............................................................................................44
3.3.3使用Yagi-Uda antenna於系統偵測無人機.........................................................................................46
第四章 結論.................................................................................................................................................53
參考文獻......................................................................................................................................................54

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