Filter assembly comprising a plastic resonator support and reson

Details Filter assembly comprising a plastic resonator support and reson Filter assembly comprising a plastic resonator support and reson

1995-07-06

1997-03-18

Lee, Benny T.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

3332191, 333235, H01P 120

Patent

active

056126557

ABSTRACT:
A filter including a cavity, a resonator structure and having a plastic resonator support and plastic tuning assembly suitable for both manual and automatic tuning applications. The dielectric resonator structure comprises a substantially cylindrical ceramic resonator, and a plastic support having a plurality of spaced apart elements diverging from a shoulder of the plastic support, each of the elements terminating in a cantilevered stop, the cantilevered stops holding the ceramic resonator in a fixed relationship with respect to the plastic support and the cavity. A resonator tuning assembly is provided that comprises a substantially cylindrical ceramic tuning element and a plastic tuning shaft having a coupling means at a first end and being threaded along a portion of its length. A ceramic tuning element is affixed to the shaft at a second end. A substantially cylindrical tuning cap is threadably engaged with the plastic tuning shaft, such that rotational motion of the tuning shaft within the tuning cap results in linear motion of the tuning element with respect to the tuning cap.

REFERENCES:
patent: 4121181 (1978-10-01), Nishikawa et al.
patent: 4477788 (1984-10-01), Collinet et al.
patent: 4500859 (1985-02-01), Ren et al.
patent: 4728913 (1988-03-01), Ishikawa et al.
patent: 5329687 (1994-07-01), Scott et al.

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