Bimodal cavity resonator and microwave spectrometers using same
Abstract
Abstract A CENTRAL PORTION OF THE CAVITY IS CAPABLE OF SUPPORTING TWO RESONANT MODES WHILE ADJOINING EACH SECTIONS EACH SUPPORT ONLY ONE OF THE MODES. WAVEGUIDES CONNECTED TO EACH OF THE END SECTIONS COUPLE MICROWAVE ENERGY TO THE CAVITY TO EXCITE THE TWO MODES THEREIN. A SAMPLE OF MATTER IS INSERTED INTO THE CENTRAL PORTION SO AS TO BE IRRADIATED BY BOTH MODES. A TUNING SCREW IN EACH OF THE END SECTIONS PERMITS INDEPENDENTLY TUNING THE CAVITY TO THE RESONDANT FREQUENCY OF ONE OF THE RESONANT MODES. ADJUSTING SCREWS IN THE CENTRAL PORTION OF THE CAVITY STRUCTURE PERMIT ADJUSTMENT OF THE CROSS COUPLING BETWEEN THE TWO MODES. THE MICROWAVE SPECTROMETER DESIGNS TAKE ADVANTAGE OF THE ABILITY OF THE CAVITY TO BE INDEPENDENTLY TUNED TO THE RESONANT FREQUENCIES OF EITHER MODE. THE SEVERAL DESIGNS PROVIDE FOR AMPLITUDE MODULATION OF THE FREQUENCY OF THE PUMPING MODE OR SCANNING OF THE FREQUENCY OF THE PUMPING MODE OR MODULATION OF AN APPLIED UNIDIRECTIONAL MAGNETIC FIELD EITHER WITH OR WITHOUT MODULLATION OF THE FREQUENCY OF THE PUMPING MODE.
Inventors
- 👤 James S Hyde
Bibliographic Details
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