Mounting a semiconductor device in a microwave cavity oscillator

Details Mounting a semiconductor device in a microwave cavity oscillator Mounting a semiconductor device in a microwave cavity oscillator

1983-09-19

1985-12-03

LaRoche, Eugene

Oscillators

With distributed parameter resonator

331107DP, 331117D, H03B 712

Patent

active

045568529

ABSTRACT:
A microwave cavity oscillator has a semiconductor device, for example a transistor for exciting the cavity to oscillate. The device is mounted upon a substrate which is itself mounted, conveniently soldered, upon a carrier which is releasably secured in a chamber adjacent the cavity. The carrier and substrate are mounted so that the device is coupled to the cavity via a hole extending therebetween and can be removed and installed as a sub-assembly to facilitate tuning and other adjustments in a test bed. In preferred embodiments one end of the carrier is located in spigot-and-socket fashion in a recess surrounding a hole communicating with the cavity. The other end of the carrier is urged by spring means to positively and accurately locate the carrier relative to the cavity. A part of the substrate extends through the hole and into the cavity. The transistor is mounted on the part within the hole and the part within the cavity serves as a capacitive coupling probe.

REFERENCES:
patent: 4021755 (1977-05-01), Svensson

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