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Graphene is a promising material for terahertz (THz) reconfigurable devices due to the tunability of the surface conductivity. Here, a graphene‐based THz miniaturized‐element tunable band‐stop frequency selective surface (FSS) is demonstrated. The proposed FSS unit cell consists of convoluted metallic strips with graphene embedded between adjacent metallic strips. The center resonance frequency of...
A novel four port multiple-input-multiple-output (MIMO) antenna at 2.4 GHz ISM band is designed in this paper. The MIMO antenna includes an octangular patch surrounded by a square ring patch. The overall system dimension is 60 × 60 × 1.6 mm3. The antenna operates in a 50 MHz bandwidth centered at 2.44 GHz. A defected ground structure (DGS) for improving the isolation between four ports is proposed...
For massive MIMO systems, it is very challenging to have the large-scale antennas for a compact base station. This paper presents a 36 sub-sectors for a compact millimeter-wave base station. The antenna array for each sub-sector is comprised of 16 planar high-gain dielectric-loaded antipodal linearly tapered slot antenna (ALTSA) elements arranged in a 4×4 configuration. Down to 36 feed ports are required...
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