waveguide propagation
waveguide propagation
[′wāv‚gīd ‚präp·ə′gā·shən] (communications)
Long-range communications in the 10-kilohertz frequency range by the waveguide characteristics of the atmospheric duct formed by the ionospheric D layer and the surface of the earth.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.