Mounting a semiconductor device in a microwave cavity...

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

H - Electricity

03

B

331/14, 331/16

H03B 7/14 (2006.01) H03B 5/18 (2006.01) H03B 1/00 (2006.01)

Patent

CA 1189581

MOUNTING A SEMICONDUCTOR DEVICE IN A MICROWAVE CAVITY OSCILLATOR Abstract of the Disclosure 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. -i-

428269

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