System Integrations of Planar Slot Array Antennas for Millimeter Wave Wireless Systems

The authors have developed high-efficiency and mass-producible planar slot array antennas using unique singlelayer waveguide structures. Four types of planar waveguides, all belonging to single-layer waveguide, are structurally quite simple and low cost while they inherit low loss characteristics from waveguides. They are leading candidates for high-gain planar antennas in high frequency wireless systems. Recent studies are directed to system integrations for microwave and millimeter wave systems. This paper describes two examples of the system integrations using the single-layer waveguide arrays as well as their state-of-the-art performances. Alternatingphase-fed waveguide arrays have realized drastic cost reduction of fixed wireless access systems in 25 GHz band while post-wall waveguide arrays have been implemented in 60GHz band RF modules for Gigabit Home-link systems.