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Old December 29th 08, 05:14 AM posted to rec.radio.amateur.antenna
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Default transmission lines and SWR and fractional wave antennas

Art wrote:
"could you state a situation where the displacement current is LARGER
than the conduction current so I may review it in the light of Newtonian
laws?"

I have difficulty in imagining current between the plates of a capacitor
exceeding the current through the capacitor`s leads.

Values of voltages and currents anywhere along an antenna primarily
depend on the impedance of the antenna at that point and then are
dictated by the phasors of the incident and reflected totals at the same
point. Arnold B. Bailey in Fig. 7-28 on page 368 of "TV And Other
Receiving Antennas" shows current distribution on a half-wave dipole
which smoothly varies from zero at its ends to maximum at its center.

Experience shows that a quarter-wave back from a maximum impedance
point, a minimum impedance point is created by incident and reflected
phasors.

Best regards, Richard Harrison, KB5WZI

 
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