Substrate Integrated Dual Linearly Polarized End-Fire Antenna Array Operating at 28GHz

We present a new cost-effective technique for designing mm wave dual linearly polarized end-fire antennas and antenna arrays using multi-layer printed circuit boards. For vertical polarization (VP) we propose a modified inverted F antenna with plated through holes. Horizontal polarization (HP) is obtained with quasi Yagi-Uda printed dipole. VP and HP elements cross each other to ensure low coupling and size reduction. A conformal dual polarized array is fed by using a parallel plate horn feeding circuit. Transition from exciting ports to parallel plate horn and from horn to radiating elements were designed by using metallic vias. For cost reduction, no buried vias are used in the design. Based on this design methodology, an optimized dual polarized beam steering antenna operating at 28 GHz is presented. Applications of this work include the design of beam-steering antennas with wide scanning angle.