System for linearly tuning a microwave oscillator

Details System for linearly tuning a microwave oscillator System for linearly tuning a microwave oscillator

1979-01-31

1980-11-18

Grimm, Siegfried H.

Oscillators

With magnetically controlled space discharge device

With frequency adjustment

315 3961, 331178, 333226, H01P 704, H03B 910, H03B 2300

Patent

active

042348552

ABSTRACT:
A resonant cavity of a microwave generator, such as a magnetron oscillator, is provided with a tuning piston which is displaceable between two terminal positions, corresponding to respective limiting frequencies f.sub.1 and f.sub.2, by means of a rotating crankshaft to which the piston is coupled by a linkage including a pitman with a substantially linearly guided extremity remote from the crankshaft axis. The length p of the pitman, measured between the pivotal axes of its extremities, is related to the eccentricity e of the crankshaft by the expression ##EQU1## where q is the length of the stroke of the linearly guided extremity between its extended dead-center position and an intermediate position in which the operating frequency of the generator has its mean value (f.sub.1 +f.sub.2)/2. With this dimensioning, the frequency varies as a sinusoidal function of the crankshaft angle and is therefore proportional to the output voltage of an angle sensor coupled with the crankshaft.

REFERENCES:
patent: 3414761 (1968-12-01), Glenfield
patent: 3441794 (1969-04-01), Chun
patent: 3441795 (1969-04-01), Hynes et al.
patent: 3590313 (1971-06-01), Stoke
patent: 3852638 (1974-12-01), Stoke

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