27 April 2000 Holographic subsurface radar: numerical simulation
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Proceedings Volume 4084, Eighth International Conference on Ground Penetrating Radar; (2000) https://doi.org/10.1117/12.383578
Event: 8th International Conference on Ground Penetrating Radar, 2000, Gold Coast, Australia
Abstract
In order to study the feasibility of developing a portable near-field subsurface radar, we perform numerical simulation of a multielement holographic antenna array. Spatial resolution, sensitivity and the instrumental error effects are estimated. In our model of a monochromatic or multifrequency holographic radar, a plane incident wave illuminates the object to be 'seen,' and a square N X N array of point receiver dipoles measures complex wave amplitude of the scattered field. Reconstruction algorithm represents the scattered wave as a superposition of Gaussian beams focused onto a certain 'plane of the best vision' z equals l. Their amplitudes can be found via modified Fourier transform in the antenna plane. The resulting angular spectrum, depending on the focal distance l, represents spatial density of virtual sources producing the registered field distribution. This algorithm provides maximum spatial resolution allowed by physical optics and can be easily implemented using standard FFT. Numerical simulation shows that a microwave holographic antenna has transversal resolution of about few centimeters, having high robustness with respect to the random phase errors. Two-frequency phase measurements can provide depth resolution of the same order of magnitude.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexei V. Popov, Alexei V. Popov, Vladimir V. Kopeykin, Vladimir V. Kopeykin, Vladimir A. Vinogradov, Vladimir A. Vinogradov, } "Holographic subsurface radar: numerical simulation", Proc. SPIE 4084, Eighth International Conference on Ground Penetrating Radar, (27 April 2000); doi: 10.1117/12.383578; https://doi.org/10.1117/12.383578
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