Amplifiers – With semiconductor amplifying device – Including field effect transistor
Patent
1981-06-15
1983-02-01
Gensler, Paul L.
Amplifiers
With semiconductor amplifying device
Including field effect transistor
330286, 333127, 333128, 333238, H03F 316, H01P 512
Patent
active
043718450
ABSTRACT:
A power divider/combiner assembly is provided which matches the impedance seen at the input/output port with the impedance seen at the peripheral end of each of plural radial transmission lines. Impedance matching is accomplished through the use of an inverted microstrip on a substrate suspended over an air dielectric. The thickness of the air dielectric is varied along each transmission line in discrete steps from the common dividing/combining end to the peripheral end of each transmission line. The air dielectric thickness can be chosen independently for each section of line so that a characteristic impedance of from 40 ohms to greater than 130 ohms is achieved.
REFERENCES:
patent: 2721312 (1955-10-01), Grieg et al.
patent: 3320556 (1967-05-01), Schneider
patent: 3582813 (1971-06-01), Hines
patent: 4234854 (1980-11-01), Schellenberg et al.
Compact Radial Power Combiner Teams Up a Dozen Power GaAs FET's, Microwaves, Oct. 1977, p. 9.
Transition Combinational Techniques, Tech. Report AFAL-TR-77-205, Westinghouse Elec. Corp., Nov. 1977.
Gensler Paul L.
Hughes Aircraft Company
Karambelas A. W.
MacAllister W. H.
Rosenberg G. B.
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