本論文為透過電磁波能被電離層反射回地面的特點，偵測到遠方的地表上有火箭發射的情形發生的前置實驗，前面先比較自我注入鎖定雷達、相位-自我注入鎖定雷達，知道哪種系統有較為優異的靈敏度。再透過放大注入訊號，使雷達系統的靈敏度進一步提升。
因為是用於遠距離偵測，注入訊號中的雜波會大於回波許多，且注入訊號過大會使注入鎖定振盪器失鎖，所以需要討論雜波對雷達系統的影響。而單天線和雙天線兩種架構相比，再需要進行雜波消除與天線擺放校正時，哪種架構對系統更為有利。本論文使用了衰減器與相移器產生一個與雜波訊號反相的訊號，與雜波訊號相加後消除，此時雷達系統的注入訊號有最大的可放大倍率，同時獲得最遠的可偵測距離。

This thesis is pre-experiment of beyond the horizon detection. By the feature of ionosphere, that can reflect electromagnetic waves back to planet surface. First, compare Self-Injection-Locked radar and PSIL radar, by the experiment know which one has better sensitivity. Second, amplify injection signal, the sensitivity of the radar system is further improved.
Because it is used for long-distance detection, the clutter in the injection signal will be much larger than the echo signal, and if the injected signal is too large, the oscillator will lose lock, so the effect of clutter on the radar system needs to be discussed. Compared single-antenna with dual-antenna architectures, when clutter cancellation and antenna placement correction are required, which architecture is more beneficial to the system. In this thesis, an attenuator and a phase shifter are used to generate a signal in the out phase of the clutter signal, which is added to the clutter signal and then canceled. At the same time, the injection signal of the radar system has the largest amplification ratio, the furthest detectable distance can be obtained.

論文審定書.............................................................................................i
誌謝........................................................................................................ii
摘要.......................................................................................................iii
Abstract.................................................................................................iv
目錄........................................................................................................v
圖次......................................................................................................vii
表次.......................................................................................................ix
第一章 序論...........................................................................................1
1.1 研究背景與趨勢..............................................................................1
1.2 雷達系統介紹..................................................................................2
1.3 章節規劃..........................................................................................5
第二章 雷達系統...................................................................................6
2.1 注入鎖定理論介紹..........................................................................6
2.1.1 注入鎖定之模型與假設...............................................................6
2.1.2 注入鎖定理論與鎖定範圍之推導...............................................7
2.2 自我注入鎖定雷達..........................................................................9
2.2.1 使用延遲單元與混頻器解調之自我注入鎖定雷達架構...........9
2.2.2 使用延遲單元與混頻器解調的理論推導...................................9
2.3 相位-自我注入鎖定雷達...............................................................11
2.3.1 相位-自我注入鎖定雷達架構...................................................11
2.3.2 PSIL雷達理論推導.....................................................................12
2.4雷達系統靈敏度比較.....................................................................13
2.4.1 兩種解調方法的文獻探討.........................................................13
2.4.2 SIL雷達、PSIL雷達元件與參數................................................13
2.4.3 SIL雷達、PSIL雷達實際測量結果............................................16
第三章 使用雜波消除技術之相位-自我注入鎖定雷達....................22
3.1 單天線的相位-自我注入鎖定雷達架構.......................................22
3.1.1 單天線的優勢.............................................................................22
3.1.2 單天線雷達架構的雜波訊號.....................................................23
3.1.3 雜波訊號下的理論推導.............................................................25
3.1.4 變容二極體對注入鎖定振盪器的影響.....................................26
3.2雜波消除技術之相位-自我注入鎖定雷達....................................27
3.2.1 雜波消除技術之相位-自我注入鎖定雷達架構........................27
3.2.2 雜波消除架構之可行性.............................................................29
3.3 使用雜波消除技術之相位-自我注入鎖定雷達實際量測結果...34
3.3.1 致動器量測結果.........................................................................34
3.3.2 模擬發射物量測結果.................................................................36
第四章 結論.........................................................................................42
參考文獻..............................................................................................43

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