Wave transmission lines and networks – Resonators – Magnetic type
Reexamination Certificate
2001-06-21
2003-01-07
Pascal, Robert (Department: 2817)
Wave transmission lines and networks
Resonators
Magnetic type
C333S219000, C333S245000
Reexamination Certificate
active
06504459
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to ferrite resonators and more particularly to coupling structures used with ferrite spheres.
A spherical ferrite is used as a resonator for building microwave tunable devices, such as oscillators, filters, limiters, and the like. In the past a complicated wire loop transducer is conventionally used to couple to the spherical ferrite resonator, which, in order to maximize coupling to the sphere, the transducer or transducers are in the shape of a half circle loop disposed around the sphere so that the wire is at roughly equal distance from the surface of the sphere. This configuration makes the assembly of these devices a time consuming task; making it almost impossible to implement an automated procedure for the purpose of high volume production of these components. What is needed is a configuration and structure to facilitate high volume manufacturability of spherical ferrite based devices.
BRIEF SUMMARY OF THE INVENTION
According to the invention, a spherical resonator device includes a resonant sphere around which transducers for electrical coupling are metallized layers on a flat surface shaped to provide exposure of the resonant sphere to a quasi constant field. In particular, the pattern comprises a transmission line of non-constant width in the region proximate to the sphere where a taper is provided which increases in width with distance from the sphere.
The invention will be better understood by reference to the following detailed description in connection with the accompanying drawings.
REFERENCES:
patent: 4500858 (1985-02-01), Mezak
patent: 4543543 (1985-09-01), Blight et al.
patent: 4633205 (1986-12-01), Jones
patent: 6255918 (2001-07-01), Parrott et al.
patent: 6348840 (2002-02-01), Ezura et al.
Ataiiyan Younes
Dunseth John
Nyiri Ernest
Scott Brian
Allen Kenneth R.
Microsource, Inc.
Pascal Robert
Takaoka Dean
Townsend and Townsend / and Crew LLP
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