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6 July 2000 Analysis of frequency response of ground-penetrating radar
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In this paper results of investigations of frequency response of ground penetrating radar are given. Radar throughput frequency response can be represented by product of frequency response of transmitter antenna, of propagation medium, of radar cross-section of object and of receiver antenna. Frequency response of propagation medium depends on distances from transmitter and received antennas to the object, and on electrical parameters of medium. Usually frequency responses of receiver and transmitter antennas are identical to match receiver frequency response and transmitted signal spectrum. However, in subsurface sounding the propagation medium (ground) is dispersive due to frequency dependence of dielectric permittivity and absorption coefficient. Dispersive distortions of signal spectrum are not negligible, because signals used in subsurface sounding are broadband with relative bandwidth more than 2. Besides, a large class of objects can be described as quasi-point (quasi-linear), with one of the dimensions being smaller than mean wavelength of sounding signal.
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Nikolai V. Chubinskii and Andrei Krampuls "Analysis of frequency response of ground-penetrating radar", Proc. SPIE 4129, Subsurface Sensing Technologies and Applications II, (6 July 2000);

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