A Compact Quad Bands Patch Antenna And MIMO Antenna System For Wireless Communications

Abstract

Furthermore, a 2 × 2 MIMO antenna is designed by utilizing the polarization diversity technique. The two spiral elements are placed orthogonally and an inverted L-shaped are placed between them to improve the isolation performance. Moreover, the proposed MIMO antenna operates (1.39), (2.5), (3.52) and 4.02 GHZ for WiMAX and C band applications. The isolation of the proposed antenna is higher than 15?dB, and the antenna maintains relatively stable radiation characteristics and gain, as well as a lower envelope correlation coefficient(ECC?less than 0.2).