C波段主動式雷達校正器系統改良、測試與分析; system improvement , measurement and analysis of C-band ARC

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Title:	C波段主動式雷達校正器系統改良、測試與分析;system improvement , measurement and analysis of C-band ARC
Authors:	吳宇軒;Wu Yuxuan
Contributors:	通訊工程研究所
Keywords:	主動式雷達校正器;Active Radar Cailbrator
Date:	2005-06-21
Issue Date:	2009-09-22 11:18:21 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	本實驗室已經發展出C波段主動式雷達校正器，成功的對於兩顆C波段的衛星(ERS-2與 ENVISAT)進行輻射校正，為了進行幅射校正，對於主動式雷達校正系統的系統增益、延遲時間都經過校驗，也已掌握了兩顆衛星的輻射校正係數(K)值。在完成主動式雷達校正器的設計與輻射校正實驗後，對於系統的部份缺失也在影像中顯示出來，對於主動式雷達校正器的系統缺失在本篇論文中將會深入討論，也將改變其主動式雷達校正器的系統架以解決先前系統電路的缺失。在另一方面也針對主動式雷達校正器內部部份原件進行設計，所設計的原件包括本地振盪源與雙極化微帶天線，本地振盪源將使用介電質共振器(DRO)來取代先前的訊號產生器，完成本地振盪源使得在進行野地輻射校正時將不再需要攜帶訊號產生器，在操作上能夠更為方便。展望未來的全偏極化衛星時代，自行設計雙極化微帶天線將可利用在多偏極化或全偏極化衛星校正，取代現有的單偏極化號角天線，且可省下購置雙極化號角天線的費用。 We have already developed the active radar calibrator in C-band, the successful one can work in radiometric calibration for two satellites (ERS-2 and ENVISAT) now. In order to calibrate the “K” constant precisely, the system gain and delay time of ARC should be considered in this work. Old active radar calibrator still has some problem and will be investigated in this thesis. Besides, we will revise the structure of ARC system to solve the problem in old one. On the other hand, some devises of ARC are designed including DRO and microstrip antenna of dual-polarization. The DRO replaces the signal generator and the microstrip antenna replaces the horn antenna for decrease the cost of this system. The two new devises of ARC will be more powerful when operating the ARC to calibrate the satellites. Moreover, the design of dual-polarization microstrip antenna can be applied in radiometric calibration of alternative and fully polarimetric satellites.
Appears in Collections:	[Graduate Institute of Communication Engineering] Electronic Thesis & Dissertation

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