A Compact MIMO Antenna with Inverted C-Shaped Ground Branches for Mobile Terminals

Abstract EN

A compact printed MIMO antenna for mobile terminals is presented.

With two planar antenna elements, the −6 dB impedance bandwidth of 2.32 GHz (1.48–3.8 GHz) is obtained, which covers GSM 1800/1900, UMTS, WLAN, Wimax, S-band, and most of LTE bands.

Each antenna element with a small occupation of 15 × 20 mm2 consists of a driven strip and a shorted strip.

Two inverted C-shaped ground branches are introduced between two elements to improve the isolation.

The simulated results are studied and the measured results show that high isolation of more than 18 dB at the entire operating band is achieved.

Meanwhile, the impedance performance is also improved by adding the branches.

Furthermore, the measured radiation performances and envelope correlation coefficient also demonstrate that the proposed antenna could be a good candidate for mobile terminals.