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US 6,285,268 B1Granted
Coupling network and method for widening the varactor diode tuning band of microstrip dielectric resonators
AssigneeAlcatel
InventorUmberto Lodi
Life of this patent
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AssigneeAlcatel
InventorUmberto Lodi
Estimating the term…
A coupling network and a method are described for widening the varactor diode tuning band of microstrip dielectric resonators, for instance in microwave oscillators or in filtering arrangements. The present invention substantially provides for modifying the single-line asymmetric structure of a conventional network still utilizing a single varactor diode mounted on the plane of the microstrip circuit. In other words, the transmission line is duplicated thus creating a dipole structure which assures a tighter coupling with the dielectric resonator. Thanks to the duplication of the transmission line and to the fact that the center of the dipole is the location where currents are higher, it is possible to obtain far wider tuning bands as compared with a known and conventional configuration.
A microstrip coupling network for electrically widening a tuning band of a dielectric resonator, comprising:
A method for widening the tuning band of a dielectric resonator through a microstrip coupling network, said network comprising a varactor diode and a transmission line, wherein the method comprises the step of duplicating said transmission line for creating a dipole structure having two branches coupled to separate terminals of said varactor diode in series, and providing a tighter coupling with said dielectric resonator.
A microstrip coupling network for electrically widening a tuning band of a dielectric resonator, said network including a varactor diode and a transmission line, wherein said transmission line is double or duplicated for creating a dipole structure and providing a tighter coupling with said dielectric resonator, and said dipole structure is about one-half wavelength long.
A microstrip coupling network for electrically widening a tuning band of a dielectric resonator, said network including a varactor diode and a transmission line, wherein said transmission line is double or duplicated for creating a dipole structure and providing a tighter coupling with said dielectric resonator, and said varactor diode is placed at a center of the dipole structure and is connected to its two branches through two further line lengths.
A method for widening the tuning band of a dielectric resonator through a microstrip coupling network, said network comprising a varactor diode and a transmission line, wherein the method comprises the steps of:
A microstrip coupling network, comprising:
Dependencies are inferred from the claim text.