Negative differential mobility amplifier for a progressive wave

Details Negative differential mobility amplifier for a progressive wave Negative differential mobility amplifier for a progressive wave

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.

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