Dual-element MIMO Inverted-F Antenna for Mobile Devices

In this study, a dual-element inverted multiple input multiple output (MIMO) F antenna (IFA) operating at 2.4 GHz band is designed by means of computational electromagnetic for WLAN wireless devices. The shape of IFA element resembles two superimposed E-shaped strips. IFA element with a small size of 10×13mm² operates at the frequency range of 2.28-2.62 GHz. They are orthogonally placed at the corners of a 50×100mm² main ground board for reducing the mutual coupling, i.e. correlation between the two elements. The radiation and isolation performance of MIMOIFA is examined in regards to the radiation patterns, envelope correlation coefficient (ECC) and peak gain. The proposed MIMO-IFA shows quasi-omni-directional pattern, under 0.05 ECC and about 2.7 dBi peak gain at 2.4 GHz. Therefore, it is a better and cheap candidate for 2.4 GHz industrial scientific medical (ISM) band including WLAN as well as wireless mobile devices.