Turnable, temperature stable dielectric loaded cavity resonator and filter
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United States of America Patent
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Jul 29, 2003
Grant Date -
N/A
app pub date -
Jun 6, 2000
filing date -
Sep 24, 1999
priority date (Note) -
Expired
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Abstract
A tunable, temperature compensated, thermal and mechanical stable, dielectric loaded cavity resonator and filter assembly has high unloaded Q, wide frequency tuning range and simple structure suitable for high volume production. The cavity resonator consists of a conductive housing, a substantially cylindrical ring shape dielectric body with a low loss, low thermal expansion coefficient support, a tuning mechanism and a plastic support at the opposite side of the main cylindrical dielectric body, which holds the main cylindrical dielectric body in place. The tuning mechanism further includes a substantially cylindrical dielectric tuning element positioned in or near the hole of the main cylindrical dielectric body and a self-locked or equivalent nut locked rotor with a support using the same material as that of the main cylindrical body support. The rotor is accessible and rotational movable from the outside of the conductive enclosure, resulting in linear motion of the dielectric tuning element with respect to the main dielectric body. Therefore the resonant frequency of the resonator can be substantially adjusted.
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