SPATIAL POWER COMBINING FOR 2-DIMENSIONAL STRUCTURES

The two-dimensional (2-D) hybrid dielectric slab-beam open and closed waveguide systems are suitable for the design of planar quasi-optical integrated circuits and devices. An open system consisting of an activ e E-plane amplifier array consisting of Vivaldi-type antennas with MES FET and monolithic microwave integrated circuit (MMIC) devices was inv estigated. The 4 x 1 MESFET amplifier array generated 11 and 4.5 dB of amplifier and system gain, respectively, at 7.12 GHz, and the cascade MMIC Vivaldi-type antenna produced 24 dB of amplifier gain at 8.4 GHz , Also, experiments on a new 2-D H-plane parallel-plate closed system with a stripline slot antenna is introduced, and the wavebeam-mode the ory is presented. The new system minimizes scattering and isolation lo sses associated with open structures. The amplifier gain of the closed system based on slot antennas is compared to the open system based on Vivaldi antennas.