A Multiband MIMO Antenna with Enhanced Isolation for Wireless Applications

Abstract

The article presents a compact dual-element multiband Multiple Input Multiple Output(MIMO) antenna suitable for wireless applications. The E shaped radiating element loaded with extra slots make it suitable to operate under different frequencies with enhanced isolation of -25dB or more for the entire bands. The E-shaped patch which is less vulnerable for mutual coupling and the orthogonal arrangement of radiating elements helps in achieving high isolation between elements over the entire operating band. The coaxially fed antenna can operate over DCS1800, PCS1900, LTE, WLAN, Bluetooth, WiMAX, and also in the sub-6 5G bands. The substrate used in the design is FR4 which has a relative permittivity of 4.4 and a loss tangent of 0.02. The proposed structure has an overall dimension of 78 x 40 x 1.6mm3 with a spacing of 8 mm between the elements.