Compact multiband sensing MIMO antenna array for cognitive radio system

TL;DR: In this paper, the authors presented a new design for a multiband sensing MIMO antenna system that can be used in cognitive radio communication for a mobile platform, which consists of two identical small-size multiband antennas with dimensions 29.5 × 17 × 5 mm3 and each of them is comprised of a driven strip monopole and a coupled parasitic shorted strip.

Abstract: This paper presents a new design for a multiband sensing MIMO antenna system that can be used in cognitive radio communication for a mobile platform. The antenna system consists of two identical small-size multiband antennas with dimensions 29.5 × 17 × 5 mm3 and each of them is comprised of a driven strip monopole and a coupled parasitic shorted strip. These antennas are located diagonally to limit the mutual coupling and antenna correlation at low frequencies. The obtained operating bands are 698–990 MHz and 1710–5530 MHz, which include most of the LTE and Wi-Fi frequency bands. A prototype was fabricated and the measured results indicate that the realized efficiency is acceptable for a mobile application considering the compact size.