Study Of Millimeter-Wave Power Combining Based On Two-Dimensional Lens Antenna

This paper is aimed at a class of novel millimeter-wave spatial power com-bining technique, which uses lens antenna to process the procedure directly in the rectangular waveguide. Three power combiners, based on two-dimensional air lens antennas which are hyperbolic lens, meniscus lens and luneburg lens respectively, are derived theoretically, simulated and then measured. Besides, waveguide-to-microstrip transition finline is also investigated.The main innovation of this paper is listed as follows:1. First develops the design parameters of two-dimensional unilateral lens, thus leading to broadband performance for the meniscus-lens-based power combiner, and increasing the power combining efficiency, which makes the combiner practical.2. First introduces a novel spatial power combiner system based on luneburg lens, and improves its structure according to the characteristics of luneburg lens. This system benefits from not only compact size, but broad bandwidth as well.3. All the lenses utilized here are equivalent air lens, without dielectric loss, thus bringing advantages of high reliability, easy fabrication, low cost and low loss et al..4. Presents a simple-layout antipodal finline. which is defined by only four design parameters. This structure has advantages of clear and easy design procedure and excellent performance.