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The previous numerical matching method can't apply in the whole angle space (0° ≪ β0 ≪ 90°) whether only based on the normal incidence case nor based on grazing to the edge incidence case when solving the diffraction problem of the anisotropic impedance wedge at oblique incidence by plane wave. A revised numerical matching method (NMM) based on the framework of the uniform geometrical theory of diffraction(UTD)...
This paper presents a broadband, dual-polarized base station antenna element by reasonably designing two orthogonal symmetrical dipole, four loading cylinders, balun, feed patches, specific shape reflector and plastic fasteners. Coupling feed is adopted to avoid the direct connection between the feed cables and the dipoles. The antenna element matches well in the frequency range of 1.7–2.7 GHz and...
The use of ultra wideband radar for security systems is of interest because of the high range resolution. Much research has focused on developing effective methods for detecting, locating, tracking and imaging a human body with multiple radar systems. One important challenge in this field is how to handle data for multiple targets, because many conventional algorithms assume only a single target....
Adopting a method of moments/physical optics (MoM-PO) hybrid method, this communication explores the electromagnetic scattering from three-dimensional (3-D) isotropic or anisotropic impedance surface, based on an impedance boundary condition (IBC). According to the surface equivalence principle, the electromagnetic scattering can be replaced by the radiation of surface electromagnetic currents in...
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