NEC-LIST: traveling-wave theory

From: ken hanson <kentenna_at_email.domain.hidden>
Date: Sun, 12 Dec 1999 11:34:17 -0800 (PST)

How does the following apply to simple antennas or a wire fed against
a tower?

According to "Electronic Transmission Technology (lines, waves, and
antennas) by William Sinnema. "To obtain a feeling of where or when
traveling-wave theory should be employed, we should obtain an
expression for the wavelength of a wave. For sinusoidal signals we
define a wavelength as that distance which a wave travels in one
cycle, or period. In free space electric wavestravel at the velocity
of light" "In some devices, phase shifts of less than a degree (0.3%
of a period) are significant. In other cases, aquarter-cycle delay
(25% of a period) may be permitted." A general rule that was then
used was 1/10 of a wavelength (10%) as the decision point.

Thanks for your reply to:

Ken---_at_---
kentenna_at_yahoo.com
Received on Mon Dec 13 1999 - 05:07:09 EST

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