Dual-band Co-aperture antenna based on a single-layer mode composite transmission line

A novel co-aperture antenna named Mode Composite Antenna (MCA) is proposed in this paper based on the concept of Mode Composite Transmission Line. The MCA combine the structure of monopole antenna and SIW slot antenna to form a new co-aperture antenna. Because of the structure sharing characteristic in MCA, it can reduce the size of the antenna. The MCA serves as the monopole antenna supporting the surface current on the antenna patch in its low operation band. In its high band operation, the SIW will support TE10 to excite the slot array. The two-mode operation has high isolation which makes the MCA a promising candidate for multi-band application. The measured and simulated results agreed well and validated the feasibility of the MCA.