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US 6,617,945 B2Granted
Filter with an electrically tunable resonator
AssigneeTekelec Temex
InventorsFrederic Roger Lotz, Pierre Jean Monteil, Patrick Albert Georges Desrumaux, Gerard Ernest Emile Forterre
Life of this patent
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Abstract
A filter or multicoupler has at least one resonator which can be electronically tuned by a tuning device, has at least one tuning element such as a tuning capacitor, a switching element for selectively connecting the tuning element electronically to the resonator, and a control device for the switching element. The resonator is a coaxial quarter-wave resonator with a central component having free surface perpendicular to the central axis for mounting of tuning devices.
Claims15
A filter including;
- an electronically tunable resonator,
- at least one tuning capacitor,
- a switching element for selectively connecting the tuning capacitor to the resonator,
- a control device for the switching element, wherein the resonator is a quarter-wave coaxial resonator with a central component having a free surface, perpendicular to a central axis of the coaxial resonator, for mounting of the tuning capacitor, and
- a plurality of tuning devices having different thermal dissipations removably mounted on the free surface.
2 more elements
A filter including:
- an electronically tunable resonator,
- at least one tuning capacitor, a PIN diode switching element for selectively connecting the tuning capacitor to the resonator, and
- a control device for the PIN diode switching element, wherein the resonator is a quarter-wave coaxial resonator with a central component having a free surface, perpendicular to a central axis of the coaxial resonator, for mounting of the tuning capacitor.
A filter including:
- an electronically tunable resonator,
- at least one tuning capacitor, a transistor switching element for selectively connecting the tuning capacitor to the resonator, and
- a control device for the transistor switching element, wherein the resonator is a quarter-wave coaxial resonator with a central component having a free surface, perpendicular to a central axis of the coaxial resonator, for mounting of the tuning capacitor.
Dependencies are inferred from the claim text.