Two closely spaced MIMO balanced antennas consist of four printed U-shaped folded arms developed to operate over dualband spectrum of C-band and WLAN. The two-element MIMO antennas are printed over 1.6mm FR4 substrate. The present MIMO design occupies a volume of 60 × 23 × 1.6 mm3. The two MIMO balanced antennas are placed over a ground plane dimension of 120mm×60mm2. To enhance the isolation between the antenna element, an I-shaped slot is generated on the ground plane, which presents a high isolation of around −20dB at both bands. This antenna also shows promising performances in terms of envelope correlation coefficient, channel loss, power gain, efficiency and current surfaces. This makes the present design a suitable candidate for future MIMO systems.
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