Abstract:

This work proposes a small planar quad-element ultrawideband (UWB) antenna with a band-notch and low coupling for multiple-input multipleoutput (MIMO) systems. The antenna is made up of four circular monopoles with a modified defective ground plane and a regular electromagnetic band gap (EBG). The suggested EBG structures differ from classic mushroom-like structures in that they are made up of grid patterns on the top patch, the metallic ground plane, and many vias that link the top and bottom planes. It is printed in the dielectric substrate's centre to reduce electromagnetic coupling between parallel parts. Moreover, a strong band-notched feature is created by etching four crescent ring-shaped resonant holes on the radiators. From the experimental results, the −10 dB bandwidth of the antenna is extended covers from 3.0 to 16.2 GHz, with a sharp notched band at 4.6 GHz. And the isolation is greater than 17.5 dB between its elements, with a peak gain of 8.4 dB and a peak efficiency of 91.2%. Moreover, it has a compact size at 3 GHz and could be a good candidate for portable devices.

Description:

MIMO, EBG, ELECTROMAGNETIC COUPLING. Software Tools: CST