Design, fabrication and characterization of wideband high diffraction efficiency phased array Bragg cells

The fundamental design issues associated with wideband, high-diffraction-efficiency phased-array Bragg cells are addressed. Also discussed are the key fabrication steps necessary to obtain optimal results. TRW has fabricated and tested 1-GHz-bandwidth (f/sub c/=2.5 GHz), 2-GHz bandwidth (f/sub c/=2.0 GHz), and 2-GHz-bandwidth (f/sub c/=3.0 GHz) GaP longitudinal-mode Bragg cells. Results presented include diffraction efficiency (30%/RF watt, 1-GHz-bandwidth) (8%/RF watt, 2-GHz-bandwidth), two-tone third-order intermodulation products, and frequency response.<>