Spatial power combining for two dimensional structures

A hybrid dielectric slab-beam waveguide is suitable for the design of planar quasi-optical integrated circuits and devices. In this paper a 2-D quasi-optical power-combining system with convex and concave lenses was investigated. The system employs an active E-plane amplifier array consisting of Vivaldi-type antennas with MESFET and MMIC devices. The system was tested by switching the amplifier bias off and on while measuring the power with an E-plane horn. Tests were performed with a single MMIC amplifier and a 4/spl times/1 MESFET amplifier array. The amplifier array generated 11 dB and 4.5 dB of amplifier and system gain respectively at 7.12 GHz, and the single MMIC Vivaldi-type antenna produced 24 dB of amplifier gain at 8.4 GHz.