A Wideband Printed Inverted-F Antenna for MIMO Application

Abstract

This research proposes a wideband printed MIMO antenna, based on two printed inverted-F antennas introduced by authors in past studies. These antennas are connected by isolation and impedance matching section, comprising a crank element, two L-shaped elements and two small rectangular elements. The detachment structure serves as a radiation element, causing resonance to improve isolation and impedance bandwidth. The measured 2-VSWR bandwidth is approximately 97.9% (2.4 GHz −7.0 GHz) with antenna spacing of $0.125 \lambda_{l}$, where $\lambda_{l}$ is the wavelength in free space at the lowest frequency. The transmission coefficient in the frequency band is below −17 dB.