Dual-band quad-port MIMO antenna for C-band and X-band applications

This work proposes one quad-port dual-band MIMO antenna for C-band and X-band applications. It accommodates four novel-shaped patch antennas in an orthogonal configuration, in which one decoupling structure and 4 L-shaped stubs are used to improve isolation. The proposed antenna operates in the range of 4.19–6.23 GHz and 9.26–9.68 GHz. It achieves more than 17 dB and 24 dB isolation in the two bands, respectively. The footprint of the suggested design is 47.2×47.2 mm2 (0.82λ0×0.82λ0). It attains a peak gain of more than 2 dB and a radiation efficiency above 60%. The proposed design achieves the following MIMO parameters: ECC 9.65 dB, TARC < −10 dB, −6 dB < MEG < −8 dB and CCL < 0.4 bits/s/Hz. The S-parameters, radiation patterns, gain, efficiency and MIMO parameters of the suggested antenna are obtained using the HFSS 3D simulator and validated using VNA and an anechoic chamber. The S-parameters are also verified with the help of an equivalent circuit model. The suggested antenna exhibits substantial performance enhancement, making it a suitable candidate for n79, n46, n47 and n102 band applications.