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Old May 8th 09, 09:01 PM posted to rec.radio.amateur.antenna
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Default Dual-Z0 Stubs

Art wrote:
"Thus Kraus`s antennas are not in equilibrium and thus deviated away
from Maxwell`s laws."

Impossible.

Maxwell`s laws are all that is nscessary and sufficient to describe
radiation from any antenna.

On page 37 of Kraus & Marthelka`s "Antennas for All Applications" one
can read:

"Although a charge moving with uniform velocity along a sreaighr
conductor does not radiate, a charge moving back and forth in simple
harmonic motion along the conductor is subject to aceleration (and
deceleration) and radiates."

To better understand Maxwell and radiation, I recommend
"Radio-Electronic Transmission Fundamentals" by B. Whitfield Griffith,
Jr (now reprinted by Scitech Publishing Inc..

See "Directive Patterns Over Real Groind" in the "ARRL Antenna Book"
for how rays combine to make a pattern.

Best regards, Richard Harrison, KB5WZI


 
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