A New UWB-MIMO Multi-Antennas With High Isolation For Satellite Communications

摘要

The patch antenna is a basic component of a radio transmission channel that is specified among the best receiver transmitting structures, because of it's low cost of assembly. The use of metamaterial structures, which has proved to be attractive in the electromagnetic field has created a neutralization effect making it possible to improve the insulation. In this article, we propose to use a technique of reducing the coupling in a MIMO antenna network that is very close to each other. These antennas are spaced 0.24λ part. We propose a patch antenna with a modified ground plane on a FR4 substrate of dimension (25×30×1.6mm³). The bandwidth ranges from 3 to 20 GHz with a bandwidth of about 16 GHz (84.9%). The simulations show that the addition of the metamaterial increases the isolation between the antennas. This greatly increases the transmission rate. To increase the efficiency of this type of network, the approach which is based on the use of a linear chain formed of 4 SRRs (split ring resonator) cells composed of suspended meta-surfaces, is proposed as a solution and represents a filter frequency band rejector between antennas in the near field making it possible to improve insulation and total efficiencies.