Electrical Engineering

The Columbia Encyclopedia, 6th ed. A Dictionary of Astronomy Further reading

waveguide

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

waveguide device that controls the propagation of an electromagnetic wave so that the wave is forced to follow a path defined by the physical structure of the guide. Waveguides, which are useful chiefly at microwave frequencies in such applications as connecting the output amplifier of a radar set to its antenna , typically take the form of rectangular hollow metal tubes but have also been built into integrated circuits. A waveguide of a given dimension will not propagate electromagnetic waves lower than a certain frequency (the cutoff frequency). Generally speaking, the electric and magnetic fields of an electromagnetic wave have a number of possible arrangements when the wave is traveling through a waveguide. Each of these arrangements is known as a mode of propagation. Waveguides also have some use at optical frequencies.

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waveguide

A Dictionary of Astronomy | 1997 | Copyright

waveguide A hollow metal pipe, normally of rectangular cross-section, designed to carry radio waves with little attenuation. A waveguide is commonly used to carry waves from a horn antenna at the focus of a radio telescope to the receiver.

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"waveguide." A Dictionary of Astronomy. 1997. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O80-waveguide.html

"waveguide." A Dictionary of Astronomy. 1997. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-waveguide.html

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Free newspaper and magazine articles

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