Internal MIMO antenna to selectively control isolation characteristic by isolation aid in multiband including LTE band

For the stable 4G communication system, we propose an internal MIMO antenna of which isolation characteristic can be controlled by an isolation aid in multiband including LTE. Proposed antennas are located at both edges of ground plane and they are connected through the isolation aid with switching circuits on PCB. These antenna were designed many radiators or by using tapered feeding technique have multi band or wide bandwidth including LTE characteristic. Isolation aid connected switching circuits improves isolation by linking hot spots of each shorting plate near ground plane in lower and higher band, respectively. Thus, this MIMO antenna module can control the flow of induced current among antennas and consequently improves the isolation characteristic in multiband including LTE.