Microwave oscillator with temperature compensation

Details Microwave oscillator with temperature compensation Microwave oscillator with temperature compensation

1991-11-12

1993-06-01

Pascal, Robert J.

Oscillators

With distributed parameter resonator

333232, H03B 100

Patent

active

052163881

ABSTRACT:
A microwave oscillator includes a metal housing which defines a cavity in which microwave radiation is produced by an internally mounted Gunn diode or the like. A tuning member projects into the microwave cavity through a hole formed in a wall of the oscillator housing. Depending on the length of its projection into the cavity, the tuning member controls the frequency of the microwave energy produced by the oscillator. The tuning member is supported on the cavity housing by a mounting member made from a material having a relatively high coefficient of thermal expansion. Particularly preferred materials include polymers such as polyethylene and polypropylene. Preferably, a microwave filter or choke is provided to reduce the leakage of microwave energy from the cavity through the hole in the oscillator housing. Such a choke comprises a pair of capacitors separated by an inductor. These elements are defined by (a) a portion of the oscillator housing, (b) the tuning screw (which is given a special cross-sectional contour), and (c) a sleeve of dielectric material, such as Teflon, which surrounds the tuning member.

REFERENCES:
patent: 4019161 (1977-04-01), Kimura et al.

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