Multimode Wideband MIMO Antenna with Dual-polarized Characteristic

A multimode wideband MIMO antenna with dual-polarized characteristic is presented in this paper. The wideband performance can be obtained by exciting multiple modes, including loop mode, slot mode, monopole mode, high order mode, etc. Due to the fact that two elements share the same radiation aperture, the proposed antenna can obtain a compact size of 56×48 mm
²
. Furthermore, the two feed ports are designed orthogonally to realize dual-polarized characteristic and high port isolation. A prototype is fabricated and tested. The planar antenna structure makes the proposed antenna low cost and easy to be manufactured. The measured results demonstrate that both the two elements can cover a - 10dB impedance bandwidth of 1.91GHz-4.98GHz. And the port isolation is more than 15dB within the operating frequency band.