US PATENT SUBCLASS 333 / 227
.~ Cavity resonator

Current as of: June, 1999
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219  DF  RESONATORS (DISTRIBUTED PARAMETER TYPE) {7}
227.~ Cavity resonator {4}
228  DF  .~.~> With mode suppressor
229  DF  .~.~> With temperature compensation
230  DF  .~.~> With coupling
231  DF  .~.~> With tuning {1}

DEFINITION

Classification: 333/227

Cavity resonator:

(under subclass 219) Devices and systems where the resonator device is an enclosure or cavity so constructed that the field configuration excited within the boundaries of the device includes longitudinal as well as transverse field components.

SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

5+, for cathode-ray tubes which have structurally combined therewith a hollow resonant structure (e.g., waveguide hollow resonator); subclasses 39+ for electronic tubes structurally

combined with a waveguide section; and subclasses 39.51+ and 40 for other electronic tubes structurally combined with resonator structure (e.g., magnetrons).

330, Amplifiers,

45, for electron beam tube amplifiers coupled to a cavity resonator; and subclass 56 for amplifiers, generally having a resonator of the waveguide, cavity, or concentric line type.

331, Oscillators, 5, 6+, 81+, 86+, 93, and 96 for oscillator systems utilizing distributed parameter resonators, which resonators may be of the cavity or hollow waveguide type.

332, Modulators, particularly

129+, for resonators in frequency modulators and subclasses 163+ for resonators in amplitude modulators.

343, Communications: Radio Wave Antennas,

762, and 772+ for waveguide-type antennas; and subclass 771 for plural slot-type antennas with waveguide coupling.