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A rectangular-shaped defected ground structure (DGS) is introduced and applied to design a 1:3 unequal Wilkinson power divider at 2GHz. The rectangular-shaped DGS pattern can greatly increase the equivalent inductance and decrease the equivalent capacitance at the same time. Higher impedance of the microstrip line with the DGS than that of conventional one can be realized. It is more convenient for...
A novel in-line waveguide-to-microstrip transition using coaxial probe structure in the U-band is proposed. This transition has the advantages of low loss, compact structure and hermetic package. A metal post is inserted into the center E-plane of the waveguide to prompt the conversion of electromagnetic wave. Experimental results of the transition verify the validity of the design. A net transition...
How to overcome the instability of the two-layer dispersive media mie series formula is firstly discussed when the electric size of sphere is large. Then, the radar cross section of an impedanced-matched, ideal, homogeneous double-negative (DNG) metamaterials sphere is computed. The backward radar cross section of the DNG media sphere adds up to zero. The radar cross section of metallic sphere covered...
Soviet scientist Veselago [1] indicated in 1968 that media with negative permittivity and permeability would have distinct electromagnetic characteristic. In 2001, Inspired by the work of Pendry et al., Smith et al. constructed a composite "medium" in the microwave regime by arranging periodic arrays of small metallic wires and split-ring resonators. This media can also be mentioned double-negative...
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