Tx/Rx Antenna System for Full-Duplex Application

This paper presents the design of an antenna system consisting of a Tx and a Rx antenna close to each other for SISO, MISO or SIMOFull Duplex applications. The reduction of the self-interference or mutual coupling is obtained by combining a compact two patches array and a single patch placed to specific chosen positions determined thanks to parametric studies in order to obtain a diversity system. Thus, an isolation level better than 50 dB at 5.5 GHz is reached. A good agreement between measured and simulated results is also observed. This result, combined with analog and digital cancellation techniques, can satisfy the self-interference challenge of Full Duplex system.