Compact multiband MIMO antenna for next generation USB dongle application

In this paper, a compact printed strip MIMO antenna with an embedded chip inductor for LTE/WCDMA/WiBro applications was proposed. The proposed MIMO antenna consists of a simple two-strip monopole and embedded chip inductor. The antenna´s lower and upper bands are contributed by the longer and shorter strips, respectively. The fabricated antenna has the isolation of about -18 dB at the lower band and lower than -12 dB at the higher band. The measured peak gains of two antenna elements are -0.52 dBi and -0.64 dBi at the LTE band 13, 3.8 dBi and 3.5 dBi at the WCDMA band and 3.4 dBi and 3.2 dBi at the WiBro band, respectively. The simulated and measured results show that the proposed multiband MIMO antenna could be a good candidate for 4G mobile systems.