電機資訊學院: 電信工程學研究所指導教授: 瞿大雄楊秉學Yang, Ping-HsuehPing-HsuehYang2017-03-062018-07-052017-03-062018-07-052015http://ntur.lib.ntu.edu.tw//handle/246246/276159本論文主要依據微波全像術，使用65GHz毫米波單頻球面波照射金屬散射物體，經由準單向之後向式二維平面裝置，接收並記錄二維散射電場振幅與相位，再使用影像重建公式，重建金屬散射物體之毫米波影像。 理論分析證明，當散射物體被球面波照射且滿足物理光學近似，於近場以二維平面式空間掃描，記錄物體散射電場振幅及相位，亦即使用多角度掃描，擷取金屬散射物體之散射場，經由傅氏轉換相位修正，得到散射物體傅氏空間資料，再經二維反傅氏轉換，可重建金屬散射物體之表面形狀。本論文並建立實驗量測系統，使用低增益號角天線作為發射天線，該天線之傅氏空間資料近似於脈衝形狀，接收天線則採用導波管開口，因其具有較小等效面積，用以準確紀錄二維平面位置之散射電場振幅與相位，實驗結果顯示重建之金屬散射物體毫米波影像，具有高解析度且與球面波模擬結果相近。This thesis is based-on the microwave holography to develop a millimeter-wave imaging system. In this study a metallic object is illuminated by a millimeter-wave at 65 GHz, the object scattered field including amplitude and phase is recorded in a quasi-monostatic two-dimensional near-field backscattering arrangement. The millimeter-wave image of scattering object is reconstructed through an image reconstruction algorithm. In the analysis, the scattering metallic object is illuminated by a spherical wave, under physical optics approximation, its scattered field over a quasi-monostatic two-dimensional near-field backscattering arrangement is derived. The object Fourier space data is then recorded using angular diversity method. In the measurement a horn antenna is used as the transmitting antenna and an open-ended waveguide as the receiving probe antenna. The transmitting antenna response closes to impulse shape in the Fourier space and receiving probe has a small receiving aperture. Experiment results of the millimeter image of different types of metallic objects with millimeter resolution are shown in good agreement with the simulation results.7268438 bytesapplication/pdf論文公開時間: 2015/8/1論文使用權限: 同意有償授權(權利金給回饋本人)毫米波影像準單向後向散射解析度Millimeter-wave imagequasi-monostatic backscatteringresolutionthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/276159/1/ntu-104-R01942136-1.pdf