Wideband and High Efficiency SIW Cavity Backed Magneto Electric Dipole Antenna Array

What is it about?

a compact, wideband and high-efficiency substrate integrated waveguide (SIW) feeding cavity-backed aperture-coupled magneto-electric (ME) dipole antenna element and its array are proposed. Firstly, a SIW cavity-backed and a modified bowtie dipole are designed for the antenna element which make it possess a high gain and wide impedance bandwidth. The antenna element covers an impedance bandwidth of 66.3% from 10.7 to 21.3 GHz with a peak gain of 10.3 dBi. Secondly, a 4×4 array is designed using the proposed antenna element. And a full corporate substrate integrated waveguide feeding network is introduced to excite the array elements for the antenna application with wide bandwidth and high efficiency. For validation, a prototype of 4×4 array is fabricated by standard printed circuit board (PCB) facilities, and further measured. The measured -10 dB impedance bandwidth of the proposed 4×4 antenna array is 30% (12.75-17.25 GHz) with its gain being 18.2-20.9 dBi within the entire band. The measured maximum aperture efficiency of the antenna array is 94% at 14.92 GHz. Notably, the measured results agree well with simulations, and it shows great advantages over other similar antennas on efficiency and bandwidth.

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Why is it important?

The measured -10 dB impedance bandwidth of the proposed 4×4 antenna array is 30% (12.75-17.25 GHz) with its gain being 18.2-20.9 dBi within the entire band. The measured maximum aperture efficiency of the antenna array is 94% at 14.92 GHz. Notably, the measured results agree well with simulations, and it shows great advantages over other similar antennas on efficiency and bandwidth.