A Miniaturized 4×4 Spatula-Shaped MIMO Antenna for Radar and Satellite Applications.

In this communication, a quad-port MIMO antenna with quad-band is proposed, for X-band (8-12) GHz and Ku-band (12-18) GHz applications; particularly applicable for radar and satellite applications. The proposed antenna has measured |S₁₁|, |S₂₂|, |S₃₃| & |S₄₄| < -10 dB, Isolation (|S₂₁|, |S₃₁|, |S₃₂|, |S₄₁|, |S₄₂| & |S₄₃|) < -20 dB and maximum peak gain of 11.37 dBi at entire port 1- 4. ECC value has obtained between ports 1-2, 1-3 & 1-4 is < 0.031. DG originated between ports 1-2, 1-3 & 1-4 is in the range of 9.994-9.999 (dB), channel capacity loss (CCL) < 0.086 bits/sec/Hz, VSWR < 1.78, TARC < 0 dB and radiation efficiency is more than 62% at entire operating band has obtained. The novelty of radiating elements are placed orthogonally to each other and increased bandwidth, gain and other antenna characteristics by having rectangular and circular slot cuts as compared to the reported published paper. The simulated and measured results of the proposed antenna have been validated and minor deviation between simulated and measured results has been observed. [ABSTRACT FROM AUTHOR]