Two-dimensional Quasi-monostatic Millimeter-wave Imaging of Metallic Object in the Near-field Region

• Main Authors: Ping-Hsueh Yang, 楊秉學
• Other Authors: Tah-Hsiung Chu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/81054544862811448115

碩士 === 國立臺灣大學 === 電信工程學研究所 === 103 === 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.