Amplifiers – With solid element wave propagating amplifying device
Patent
1977-09-07
1978-07-04
Rolinec, Rudolph V.
Amplifiers
With solid element wave propagating amplifying device
330 53, H03F 304
Patent
active
040991326
ABSTRACT:
A negative differential mobility amplifier with a layer of semiconductor material of negative differential mobility. Two electrodes formed by two metallic combs are disposed on the free surface of the layer of semiconductor material. Overlapping fingers of the metallic combs are orthogonal to the propagation direction of the progressive wave and form an ohmic contact with the free surface of the semiconductor layer. The semiconductor layer is deposited onto a first surface of a dielectric substrate. A second surface of the dielectric substrate opposite to the first surface is provided with a metallic plate. The two electrodes are brought in operation to different electrical d.c. biassing potentials by a biassing source and to the high frequency potential of the progressive wave to be amplified. A line of asymetric parallel bands is formed by the metallic plate, the metallic combs, and the dielectric substrate.
REFERENCES:
patent: 3833858 (1974-09-01), Gandhi et al.
"Thomson-CSF"
Hostetter Darwin R.
Plottel Roland
Rolinec Rudolph V.
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