Cavity resonator
From Free net encyclopedia
Template:Cleanup-date A cavity resonator uses resonance to amplify a wave.
Description and examples
The cavity has interior surfaces which reflects a wave, usually electromagnetic, of a specific frequency. When a wave that is resonant with the cavity enters, it bounces back and forth within the cavity, with low loss (See standing wave). As more wave energy enters the cavity, it combines with and reinforces the standing wave, increasing its intensity.
Some common examples of cavity resonators include the klystron tube. In a microwave oven (see also magnetron), the tube of a flute, and the body of a violin (this latter also being an example of a Helmholtz resonator). The calculation of the exact magnetic field has mathematical complexities and involves the study of Bessel functions.
Other examples of cavity resonators include the klystron tube waveguide as in a particle accelerator that work in conjunction with a specifically tuned cavity by the configuration of the structures. On the beamline of an accelerator system, there are specific sections that are cavity resonators for RF.
In a laser, light is amplified in a cavity resonator which is usually composed of two or more mirrors. Thus an optical cavity, also known as a resonator, is a cavity with walls which reflect electromagnetic waves (light). This will allow standing wave modes to exist with little loss outside the cavity.
Patents
The USPTO classifies 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 as Class 333, Wave transmission lines and networks, and Subclass 227.
- Numbered
- Template:US patent -- Inductance-capacitance resonance circuit -- H. B. Rex
- Template:US patent -- Cavity resonator circuit -- P. S. Carter
- Template:US patent -- Ultra short wave radio system -- S. A. Schelkunoff
- Template:US patent -- Cavity resonator circuit -- P. S. Carter
- Template:US patent -- High frequency resonator and circuit therefor -- P. S. Carter
- Template:US patent -- Cavity resonator -- H. Bushholz
- Template:US patent -- High frequency tanks and resonant cavities -- S. A. Schelkunoff
- Template:US patent -- Frequency stabilization at ultra high frequencies -- F. B. Llewellyn
- Template:US patent -- Resonant system for ultra short waves -- Willi Engbert
- Template:US patent -- Electromagnetic resonator -- W. Dallenbach
- Template:US patent -- Transmission of guided waves -- G. C. Southworth
- Template:US patent -- Transmitter and reciever for electromagnertic waves -- R. Weyrich
- Template:US patent -- Electrical circuit arrangement -- R. K. Potter
- Template:US patent -- Electrical circuit arrangement -- R. K. Potter
- Template:US patent -- Electrical circuit arrangement -- R. K. Potter
- Reissued
- Template:US patent -- High-power high-frequency electron discharge apparatus -- R. H. Varian
- Template:US patent -- High efficiency resonate circuit -- W. W. Hansen
- Template:US patent -- Modulation system -- W. W. Hansen
de:Hohlraumresonator