Transmitter-receiver-transmitter-configured ground-penetrating radars over randomly heterogeneous ground models
نویسندگان
چکیده
منابع مشابه
Simulations of ground-penetrating radars over lossy and heterogeneous grounds
The versatility of the three-dimensional (3–D) finitedifference time-domain (FDTD) method to model arbitrarily inhomogeneous geometries is exploited to simulate realistic groundpenetrating radar (GPR) scenarios for the purpose of assisting the subsequent designs of high-performance GPR hardware and software. The buried targets are modeled by conducting and dielectric prisms and disks. The groun...
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The governing equations are Maxwell’s. The source of the current is either j = ey δ(z − z0)δ(x)f(t) or eφ δ(z − z0)δ(r − r0)f(t) (straight wire or loop of current, f(t) is a pulse). The conductivity σ(z) and permittivity ε(z) are unknown in the medium (z > 0) and are known in the air (z < 0). The source is in the air: z0 < 0. The μ is a known constant. The data are the values of E(x, y, z, t) a...
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Here we propose a current mode oscillator circuit using Q-Dot technology and subsequently we modify this circuit for transmitter and receiver design. We like to note that transmitter is a amplitude modulation (AM) to frequency modulation (FM) conversion technique. The receiver is of Super heterodyne structure, where the RF front end is implemented by Q-Dot devices and the IF stages are implemen...
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ژورنال
عنوان ژورنال: Radio Science
سال: 2002
ISSN: 0048-6604
DOI: 10.1029/2001rs002528