Shen Xujian

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Based on the measured polarization pattern data of the radar antenna, a polarization property measurement model is advanced. Through electromagnetic computation, a priori knowledge of the polarization property of parabolic reflector antenna is gained, and the main difference between the real data and theoretical property is addressed. Analysis of the phase(More)
The radio frequency (RF) spectrum is a limited resource. Spectrum allotment disputes stem from this scarcity as many radio devices are confined to a fixed frequency or frequency sequence. One alternative is to incorporate cognition within a reconfigurable radio platform, therefore enabling the radio to adapt to dynamic RF spectrum environments. In this way,(More)
For high frequency wave(2~30MHz), calculating the current distribute and radiation pattern for antennas is a complex problem because of the interaction between the antenna, the ground, and any buried wire net. Typically, the finite-difference time-domain (FDTD) technique is well suited for modeling fields in heterogeneous media; the method of moments(More)
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