Parallel plate microwave devices having tapered current interrupting slots
First Claim
1. A microwave device, comprising a number of parallel-plate resonators that each include a dielectric substrate and first and second superconducting plates disposed on either side of the respective substrate, wherein at least one of the plates in each of a plurality of the resonators includes means for interrupting current lines of at least one undesired mode of a magnetic field in the respective resonator, the interrupted current lines being interrupted substantially at maxima of the interrupted current lines to suppress the at least one undesired mode, wherein at least one resonator is a circular parallel-plate resonator with the current interrupting means being centrally directed, wider towards a periphery of the at least one resonator, and narrower towards a midpoint of the at least one resonator.
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Abstract
A microwave device includes a number of parallel-plate resonators that include at least one dielectric substrate and first and second plates arranged on either side of the substrate. At least one of the plates of each of a number of the parallel-plate resonators includes a current interrupting device such that the current lines of at least one undesired mode are interrupted at their maxima to suppress the undesired mode. There is also described a method of interrupting undesired modes in a microwave device having a number of parallel-plate resonators.
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Citations
20 Claims
- 1. A microwave device, comprising a number of parallel-plate resonators that each include a dielectric substrate and first and second superconducting plates disposed on either side of the respective substrate, wherein at least one of the plates in each of a plurality of the resonators includes means for interrupting current lines of at least one undesired mode of a magnetic field in the respective resonator, the interrupted current lines being interrupted substantially at maxima of the interrupted current lines to suppress the at least one undesired mode, wherein at least one resonator is a circular parallel-plate resonator with the current interrupting means being centrally directed, wider towards a periphery of the at least one resonator, and narrower towards a midpoint of the at least one resonator.
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14. A microwave device, comprising a number of parallel-plate resonators that each include a dielectric substrate and first and second superconducting plates disposed on either side of the respective substrate, wherein at least one of the plates in each of a plurality of the resonators includes means for interrupting current lines of at least one undesired mode of a magnetic field in the respective resonator, the interrupted current lines being interrupted substantially at maxima of the interrupted current lines to suppress the at least one undesired mode, wherein the current interrupting means in at least one resonator are arranged along a diameter of at least one of the plates such that the current interrupting means form an angle of substantially 90°
- with respect to current lines to suppress a TM110 mode of the magnetic field.
- 15. A method of suppressing at least one undesired mode of a magnetic field in a microwave device that includes a number of parallel-plate resonators, each resonator having respective first and second plates in which currents are generated when the magnetic field is applied, the method comprising the step of interrupting current lines of the at least one undesired mode in at least one of plates of at least one of the resonators at maxima of the interrupted current lines, wherein at least one resonator is a circular parallel-plate resonator and the current lines are interrupted by providing interrupting means that are centrally directed, wider towards a periphery of the resonator, and narrower towards a midpoint of the resonator.
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20. A microwave device, comprising a number of parallel-plate resonators that each include a dielectric substrate and first and second superconducting plates disposed on either side of the respective substrate, wherein at least one of the plates in each of a plurality of the resonators includes means for interrupting current lines of at least one undesired mode of a magnetic field in the respective resonator, the interrupted current lines being interrupted substantially at maxima of the interrupted current lines to suppress the at least one undesired mode, wherein the current interrupting means in at least one resonator are radially arranged around at least 180°
- of at least one plate in the respective resonator and at the same distance from a periphery of the respective resonator to suppress a TM020 mode of the magnetic field.
Specification