Wave transmission lines and networks – Resonators – Dielectric type
Patent
1997-11-21
1999-11-23
Ham, Seungsook
Wave transmission lines and networks
Resonators
Dielectric type
333234, H01P 710
Patent
active
059907673
ABSTRACT:
A method of producing a microwave resonator comprising a cavity (50) defined, at least in part, by a generally cylindrical wall (64) having an electrically conductive inner surface and containing a generally cylindrical piece of low loss dielectric material (22), characterised by forming a generally cylindrical piece of low loss dielectric material of predetermined size and placing same in a cavity to produce a microwave resonator which operates in a particular mode at a specific frequency at a particular temperature. Microwave radiation corresponding to a further operating mode is then passed into the cavity and then the frequency corresponding to the further operating mode is searched for and measured. A further generally cylindrical piece of dielectric material is produced by scaling from the first piece of dielectric material according to the ratio between the first and second frequencies. Then, the diameter and/or height of the cavity is varied to compensate for manufacturing inaccuracies in the crystal so as to obtain an output frequency close to the desired output frequency.
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Blair David Gerald
Edwards Simon John
Ivanov Eugene Nikolay
Searls Jesse Hyuck
Tobar Michael Edmund
Ham Seungsook
Poseidon Scientific Instruments Pty Ltd
University of Western Australia
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