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This paper presents a novel two-layered dual-band high impedance surface (HIS) and its applications to enhance the performance of a triple-band circularly polarized (TBCP) antenna. The proposed HIS consists of periodically arranged 6×6 nested concentric square patches on the top layer of the substrate to produce two in-phase reflection bands. The bottom layer is printed with periodic square patches...
This paper presents the design of a substrate integrated waveguide slotted array antenna (SIW-SAA) with wideband, multimode and multidirectional characteristics. The slotted array consists of three transverse slots in the top wall of SIW which are inclined at 45° with respect to a single longitudinal slot. The number of slots and the position of the slotted array determine the impedance bandwidth...
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