Waveguide

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A waveguide is a structure which guides waves, such as electromagnetic waves, light, or sound waves. There are different types of waveguide for each type of wave.

1 Electromagnetic waveguides
2 Optical waveguides
3 Acoustic waveguides
4 History
5 See also
6 References
7 External links

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Electromagnetic waveguides

Template:Main articles Waveguides can be constructed to carry waves over a wide portion of the electromagnetic spectrum, but are especially useful in the microwave and optical frequency ranges. Depending on the frequency, they can be constructed from either conductive or dielectric materials. Waveguides are used for transferring both power and communication signals.

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Optical waveguides

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Waveguides used at optical frequencies are dielectric waveguides, structures in which a non-conductive material with high permittivity, and thus high index of refraction, is surrounded by a material with lower permittivity. The structure guides optical waves by total internal reflection. The most common optical waveguide is optical fiber.

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Acoustic waveguides

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History

The waveguide concept was first proposed by J. J. Thomson in 1893 and experimentally verified by O. J. Lodge in 1894 using electromagnetic waveguides?;

The mathematical analysis of the electromagnetic? propagating modes within a hollow metal cylinder was first performed by Lord Rayleigh in 1897. (McLachan, 1947.)

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References

Federal Standard 1037C
MIL-STD-188
Alliance for Telecommunications Industry Solutions
J. J. Thomson, Recent Researches (1893).
O. J. Lodge, Proc. Roy. Inst. 14, p. 321 (1894).
Lord Rayleigh, Phil. Mag. 43, p. 125 (1897).
N. W. McLachlan, Theory and Applications of Mathieu Functions, p. 8 (1947) (reprinted by Dover: New York, 1964).