Microwave and millimeter wave circuit including amplifier and ba

Details Microwave and millimeter wave circuit including amplifier and ba Microwave and millimeter wave circuit including amplifier and ba

1997-10-03

1999-05-18

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

330306, H03F3/191

Patent

active

059054093

ABSTRACT:
A microwave and millimeter wave circuit includes an amplifier having an amplification center frequency, input and output terminals, and a source-grounded transistor. First and second transmission lines are connected between the input terminal and a gate of the transistor, and are connected in series to each other. Third and fourth transmission lines are connected between a drain of the transistor and the output terminal, and are connected in series to each other. A first band elimination filter is connected to the input terminal, and has a first stopping frequency, and a second band elmination filter is connected to the output terminal, and has a second stopping frequency. A third band elimination filter is connected to a connecting point between the first and second transmission lines and has a third stopping frequency, and a fourth band elimination filter is connected to a connecting point between the third and fourth transmission lines and has a fourth stopping frequency. Each of the first to fourth stopping frequencies is lower than the amplification center frequency, and each of the third and fourth stopping frequencies is higher than the first and second stopping frequencies.

REFERENCES:
patent: 5146178 (1992-09-01), Nojima et al.
patent: 5406224 (1995-04-01), Mikami et al.
patent: 5412347 (1995-05-01), Minnis

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