Design and performance analysis of tri-band Wang shaped MIMO antenna

This paper presents the design of a compact Wang shape MIMO antenna with tri-band operation for LTE 2500, 2.4/5.2 GHz WLAN, 2.5 GHz WiMAX, 8 GHz ITU application. The Wang shape MIMO antenna occupies an overall size of 70 × 52 mm 2 that includes the ground plane and substrate. The radiating elements are used to generate three resonant frequencies at 3.1 GHz, 6.2 GHz and 7.7 GHz. The simulated impedances bandwidths (|S 11 | < − 10 dB) are about 110 MHz (3.1–3.2101 GHz), 90 MHz (6.2–6.3386 GHz) and 280 MHz (7.6–7.9029 GHz) for three operating bands respectively. Here the return loss and mutual coupling of the proposed antenna system are improved over the three resonant frequencies. The simulated result shows reasonably good agreement with the measured results by using R&S ZVA 40 vector network analyzer. The radiator has a low envelope correlation coefficient with values are equal to approximately less than 0.025, which will proves that the wang-shape MIMO radiator shows better diversity performance. The wang-shape MIMO radiator has improves the parameters of reflection coefficient, mutual coupling, realized gain, group delay, real/imaginary impedances and diversity gain.