Design and application of conformal patch antenna for near-field imaging and object detection
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[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Compact and low cost planar and conformal patch antennas were designed, fabricated and analyzed for ultra-wideband characteristics. It was also demonstrated through experiment and simulation analysis how the ultra-wideband characteristics can be used in the detection of breast tumors. The designed antenna can achieve a good impedance matching over a very wide bandwidth (9.00 GHz). The bendable antenna was designed to increase antenna gain and improve radiation pattern stability. The detection and reconstruction technique utilizes dual probes for signal detection, and employs a new methodology for imaging and reconstruction called Dual-Probe Imaging through Detection and Reconstruction (DPIDR) method. The method for the detection, imaging and reconstruction of an embedded object through the application of a near field, frequency-synthesized microwave pulse is described and both experiment and software driven, which carries out extensive data collection and processing computations. This technique is based on the analysis of the transmission and reflection signal from the targeted object. The antenna used in the scanning involves three operational modes, which include: planar scan, rotational scan, and cylindrical scan mode. For complete image mapping and reconstruction, a combined scanning technique is employed since planar scanning alone cannot provide image reconstruction.
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