Compact Four-Element Phased Antenna Array for 5G Applications

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Abstract
This paper presents a four-element compact phased Planar Inverted-E Antenna (PIEA) array design for 6-GHz beamforming applications. For compact phased arrays, the mutual coupling is a severe performance degrading factor. Therefore, three mutual coupling reduction techniques are employed, which include (i) PIEA as an array element which is modified version of a Planar Inverted-F Antenna (PIFA) by inserting another shorting plate, (ii) slots in the ground plane and (iii) two slits in the etched ground slot. With these techniques, the mutual coupling is reduced below -19 dB in the operational bandwidth from 5.7 to 6.4 GHz. The compact design with an inter-corner spacing of 0.013λo and an inter-element spacing of 0.3λo is achieved. The peak gain obtained by this compact phased array is 8.36 dBi. This array can scan up to a scanning range of maximum ±90°. A good general agreement is found between erally measured and simulated results.
Funding Information
  • Deanship of Scientific Research, Islamic University of Madinah, Saudi Arabia (16/40)

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