Single and dual mode helix loaded cavity filters

Details Single and dual mode helix loaded cavity filters Single and dual mode helix loaded cavity filters

H - Electricity

01

P

H01P 1/207 (2006.01) H01P 1/205 (2006.01) H01P 7/06 (2006.01) H03H 9/46 (2006.01)

Patent

CA 2260447

Two helical resonator filters for applications in wireless and satellite communication systems. The present invention provides for single mode and dual mode microwave filters that employ evanescent waveguide cavities loaded with helical resonators. The structure of the present invention provides for a high Q factor in a miniature package. Two helical resonator filters are well adapted for use in wireless and satellite communication systems. The present invention provides for miniature filters utilizing single mode, high dielectric constant material loaded helical resonators, as well as higher order dual mode helical resonator loaded cavities. Both configurations can be used to realize advanced filters with non-adjacent coupling. The helical resonators may be loaded with high dielectric constant materials or ferrite materials for additional miniaturization and tunability. Either voltage or current tuning may be provided by the single mode and dual mode microwave filters.

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