Parasitic signal suppression circuit for an extremely high frequ

Details Parasitic signal suppression circuit for an extremely high frequ Parasitic signal suppression circuit for an extremely high frequ

1991-11-22

1993-05-25

Grimm, Siegfried H.

Oscillators

Combined with particular output coupling network

Wave filter

330 53, 330286, 330302, 331 99, H03B 104, H03F 360

Patent

active

052143953

ABSTRACT:
An extremely high frequency parasitic signal suppression circuit for use in a local oscillator of an extremely high frequency radio or satellite communication system to eliminate parasitic signals included in a local oscillation signal. A first direct current cut-off device consisting of a microstrip line is connected between the output terminal of a phase-locked oscillator and the input of an amplifier, and to a first low pass filter to supply a direct current source for the amplifier. A second direct current cut-off device and second low pass filter are connected to the output terminal of the amplifier in the same manner as the input terminal.

REFERENCES:
patent: 5051706 (1991-09-01), Zushi
patent: 5079524 (1992-01-01), Sugawara

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