High Isolation EBG Based MIMO Antenna for X-Band Applications

In this article, a high isolation EBG based MIMO antenna is designed to achieve intended characteristics. Proposed antenna is tailored on FR-4 substrate with size of $55\times 49\times 1.6\mathbf{mm}^{3}$. This antenna has circular patches with extruded triangular and circular shapes which provides better radiation efficiency (>0.45) in the X-band (8.0 to 12GHz). High isolation (−22dB) is achieved in entire bandwidth by using mushroom shaped EBG structure near the microstrip feeding line. Diversity performance of antenna is also judged by the various parameters like ECC, Diversity gain, CCL and TARC, which has the practically accepted values <0.016, >9.96dB <0.3bits/sec/Hz and <−35dB correspondingly.