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Damped Electromagnetic Waves in Hollow Metal Pipes

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1 Author(s)
Melloh, A.W. ; Institute of Technology, University of Minnesota, Minneapolis, Minn.

Simple apparatus for the production of damped waves in hollow-pipe wave guides is described. The results of some measurements at free-space wavelengths down to 4.59 centimeters in circular air-filled pipes as small as 2.86 centimeters in diameter show that such apparatus can be successfully employed for the investigation of the properties of hollow-pipe waves. Some data are given which confirm part of a previous theoretical analysis of the behavior of electromagnetic waves in a pipe of elliptical cross section, and a possible method of detecting small deformations in a supposedly circular pipe is discussed.

Published in:

Proceedings of the IRE  (Volume:28 ,  Issue: 4 )