Oscillators – Solid state active element oscillator – Transistors
Patent
1975-08-28
1977-03-08
Kominski, John
Oscillators
Solid state active element oscillator
Transistors
331101, 331107R, 333 83T, H03B 518
Patent
active
040115275
ABSTRACT:
A temperature compensated cavity oscillator comprising a resonant coaxial cavity of which the outer conductor is constructed of dissimilar materials. The end walls and adjacent portion of the outer conductor of the coaxial cavity are made of a first conductive material having a first temperature coefficient of expansion. Interposed between the first conductive material of the outer conductor, the middle portion of the outer conductor is made from a second conductive material having a second temperature coefficient of expansion. A tuning rod is displaced through the middle portion of the cavity and capacitively coupled to a center coaxial conductor to provide mechanical tuning of the oscillation frequency and for varying the frequency of the cavity with temperature such that the temperature characteristics of the oscillating element are compensated to produce a substantially stable oscillating frequency.
REFERENCES:
patent: 3160825 (1964-12-01), Derr
patent: 3271698 (1966-09-01), Adams
patent: 3733567 (1973-05-01), Johnson
Electronic Engineering, Jan. 1974, pp. 54-56, 58.
Bingham Michael D.
Kominski John
Motorola Inc.
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