James J. Rosenberg

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We have demonstrated a monolithic grid oscillator that shows 1watt of e ective transmitter power at 38GHz. Use of a wire twist re ector as an external feedback element added to a successful monolithic grid amplier allows a tuning range from 37.5GHz to 41GHz. Impedance matching is accomplished by a double-slug tuner and the movable backshort of the twist re(More)
A 100-element 10-GHz grid amplifier has been developed. The active devices in the grid are chips with heterojunction-bipolar-transistor (HBT) differential-pairs. The metal grid pattern was empirically designed to provide effective coupling between the HBT's and free space. Two independent measurements, one with focusing lenses, the other without, were used(More)
Deschamps’ theorem for n-terminal complementary structures is reviewed. An extension to Deschamps’ theorem for a class of three-terminal bounded structures with one axis of symmetry is presented. It is shown that, for these structures, a simple relationship between the impedances of the odd mode of the original structure and the admittances of the even mode(More)
Moonil Kim a, E. A. Sovero b, W. J. Hob, J. B. Hacker a,David B. Rutledge a, James J. Rosenberg c. and R. Peter Smith d aDivision of Engeineering and Applied Science, California Institute of Technology, Pasadena CA 91125 bscience Center, Rockwell International Corporation, P. 0. Box 1085, 1049 Camino Dos Rios, Thousand Oaks, CA 91358 CGermanium Power(More)
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