Compact Multiband Reconfigurable MIMO Antenna for Sub- 6GHz 5G Mobile Terminal
Surentiran Padmanathan, Azremi Abdullah Al‐Hadi, Ahmed Mohamed Elshirkasi, Samir Salem Al‐Bawri, Mohammad Tariqul Islam, Thennarasan Sabapathy, Muzammil Jusoh, Prayoot Akkaraekthalin, Ping Jack Soh
Abstract
In this paper, the design of a multiband multiple-input multiple-output (MIMO) antenna with compound reconfiguration capability in the 5G sub-6 GHz band is presented. Frequency and radiation pattern reconfiguration are enabled on the antenna consisting of two planar inverted-F antenna (PIFA) elements using PIN diodes and DC biasing circuits. This results in reconfigurability in multiple bands, ranging from 0.8 GHz to 6 GHz for GSM, UMTS, LTE and 5G-NR bands. At the same time, reflection coefficients of less than -6 dB and high isolation of at least -10 dB between ports ensures satisfactory MIMO diversity performance. Within the operating bands, total efficiencies of between 46.2% and 74.5% is achieved, with less than 0.3 of envelope correlation coefficient. This enables a channel capacity of 9.86 to 10.5 bit/s/Hz. Simulated antenna performance parameters agreed well with measurements, and potentially enables reliable and consistent data throughput for 5G mobile terminals.