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An impulse borehole radar (BHR) prototype system was developed for the exploration of complicated oil and gas reservoirs. In an abandoned limestone mine, the cliff wall and a metal-plate were selected as the imaging targets to evaluate the detection performance of the prototype system. The unknown fractures surrounding the borehole produced complex reflections that were not beneficial to effectively...
In order to meet the requirements for reconfiguration and multi-polarization, an array with seven subarrays is designed. The subarray has a shape of regular hexogen, and contains two orthogonal polarization feed ports. The angel error extraction method for this asymmetric array is discussed. After regrouping and weighting of subarrays, the sum and difference beams can be obtained in simulation. And...
In order to realize polarization and aperture reconfiguration, an array based on dual-polarization multilayer micro-strip patch antenna is presented. Several polarization reconfigurable techniques and their properties are described. The dual-polarization antenna is introduced for its orthogonal polarization basis and geometry characteristic. It can accomplish several polarization measurement modes...
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