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A new type of compact multibeam longitudinal slot array antenna fed by Rotman lens in composite construction of microstrip and substrate integrated waveguide (SIW) technology is proposed for mobile satellite communications. The antenna is constructed in the form of two layers, which is a highly integrated approach to reducing the size. A novel parallel-coupled SIW slot coupler is designed to connect...
We introduce two kinds of typical volume holographic gratings into the imaging system respectively, and discuss their resolution characteristics in lateral and longitudinal defocus condition to improve the image quality.
A volumetric negative-refractive-index transmission-line (NRI-TL) slab is proposed using a stacked shunt-node topology. The slab is analyzed using multiconductor transmission line (MTL) theory and verified by Ansoft’s HFSS. A fully printed design employing interdigital capacitors and spiral inductors is derived from the lumped-element counterpart and demonstrates low-loss and broadband properties...
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