The figure shows one of four solid-state power amplifiers, each capable of generating an output power ≥240 mW over one of four overlapping frequency bands from 71 to 106 GHz. (The bands are 71 to 84, 80 to 92, 88 to 99, and 89 to 106 GHz.) The amplifiers are designed for optimum performance at a temperature of 130 K. These amplifiers were developed specifically for incorporation into frequency-multiplier chains in local oscillators in a low-noise, far-infrared receiving instrument to be launched into outer space to make astrophysical observations. The designs of these amplifiers may also be of interest to designers and manufacturers of terrestrial W-band communication and radar systems.
This Photograph Shows One of the Amplifiers described in the text. A WR-10 waveguide input port is on the left end. The output port is on the right end, facing away. DC input and sensing conductors enter the package via a 21-pin connector. (Module dimensions: 20 ´ 49 ´ 60 mm.)
This work was done by Todd Gaier, Lorene Samoska, Mary Wells, Robert Ferber, John Pearson, April Campbell, and Alejandro Peralta of Caltech for NASA's Jet Propulsion Laboratory and Gerald Swift, Paul Yocum, and Yun Chung of TRW, Inc. For further information, access the Technical Support Package (TSP) free on-line at www.nasatech.com/tsp under the Computers/Electronics category.