Broadband millimeter wave amplifier

Details Broadband millimeter wave amplifier Broadband millimeter wave amplifier

1975-10-10

1977-12-13

Dahl, Lawrence J.

Amplifiers

With semiconductor amplifying device

Including distributed parameter-type coupling

330 56, 330 61A, 333 98R, H03F 310

Patent

active

040631869

ABSTRACT:
A millimeter wave amplifier having broadband characteristics in which a G diode or other two terminal negative resistance device having an integral heat sink is center mounted in a reduced height waveguide. The heat sink is attached to a mechanism for selectively adjusting its penetration into the waveguide cavity. The introduction of the heat sink into the waveguide cavity creates a discontinuity to the propagation of energy which causes localized waveguide modes other than the dominant mode to exist. The adjustable position of the heat sink allows the reactance due to the introduction of these modes to be variable, proper adjustment resulting in the cancellation of the parasitic reactances inherent in the packaged negative resistance device.

REFERENCES:
patent: 3681718 (1972-08-01), Kozul et al.
patent: 3775701 (1973-11-01), Dickens

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