FET Amplifier comprising a circulator for an input signal as an

Details FET Amplifier comprising a circulator for an input signal as an FET Amplifier comprising a circulator for an input signal as an

1978-07-28

1979-05-01

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including field effect transistor

330286, 330296, 330302, H03F 316

Patent

active

041526660

ABSTRACT:
In an FET amplifier comprising a series connection of a coaxial-to-waveguide converter and a circulator for supplying an FET with an input signal of a wide microwave band, such as an octave band between about 1 GHz and 12 GHz, a d.c. bias voltage is applied to the FET through the circulator from a terminator therefor. For this purpose, the terminator comprises an inner and an outer conductor insulated ohmically from each other and shunted for the microwave band, as by a capacitor of several picofarads. Preferably, a resistor and a third conductor are successively connected to the inner conductor with the capacitor placed at an end of the resistor remoter from the inner conductor and with a dummy for the input signal positioned between the outer and the third conductors.

REFERENCES:
patent: 4011518 (1977-03-01), Irvine et al.

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