A Filter-Technique Aided Design of 60-GHz Band Planar Single-feed Dual-polarized Antenna

A new dual-polarized microstrip antenna fed by a resonator-integrated feeding network is proposed for millimeter-wave wireless harness application. The dual-polarized radiation is provided by two orthogonally arranged antennas, so the radiation Q factor can be controlled for bandwidth design. Furthermore, a specified bandwidth is achieved by tap-line couplings between resonators and antenna, of which the design is aided by a filter technique. Thus, a high-profile structure and small-gap couplings employed in conventional works are not needed in the proposed antenna. A 60-GHz band dual-polarized antenna with 3-GHz bandwidth are designed and tested, thereby showing the effectiveness of the proposed structure.