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A planar ultra-wideband (UWB) antenna with dual band-notched characteristics is proposed. With the broad trapeziform slot at the bottom of radiating patch and inverse trapeziform shaped feeded metal stub, good impedance match can be achieved. Two I-shaped and one inverse E-shaped metal stubs are embedded into the broad slot, making band-notched characteristics in the frequency range between3.0 to...
Combined with the characteristic of uniformed field distribution in Hour-Glass shaped aperture, the bandwidth of flat reflectarray antenna can be easily widened by using the Hour-Glass shaped aperture-coupled element. The impedance curve and phase response curve of this element are analyzed in this paper. According to analysis, the detail designed parameters of aperture-coupled reflectarray element...
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