[Antennas] End-fed half-wave religion

[Ronald KA4INM Youvan]

> Feeding the half wave antenna at the end with a tuned circuit and a short
> counterpoise is probably the best solution. Since the current is low, a
> short non resonant counterpoise can be used.
 
  This is not necessary, sometimes it is hard to see the open end of the 

1/2 wl element in our minds eye, but with nothing connected, the impedance
is likely over 100 k Ohms and the current needed to have the current flow back
to the "other terminal" of the transmitter to complete the circuit (for those
that can't get Kirchoff's laws off of their mind) at the extremely high voltage
that is present (at opposite ends of a tuned circuit) is so low that a
transmitter & battery within the matching coil in the space of a walnut
shell (carried aloft by a balloon for example) will work just fine.
   This Voltage thus the current flow (yes, electron flow) drops when the
element is not resonant, which is why elements aren't as broad banded
as we wished they were.
   Since electrons don't flow in a vacuum, such as ON a space craft's hull,
therefore the magnetic field generated by the current flow is obviously
responsible for satisfying this condition if you dig under the surface
far enough.
   It is not a DC circuit, keeping our nose glued to Kirchoff's laws
while studying antennas and ignoring the magnetic fields produced and
the voltages produced by these magnetic lines of force will surely be
frustrating.

        73 (= Best Regards) de: Ron ka4inm@tampabay.rr.com
     100% LINUX, since July, 1997   SENT Time and Date are UTC
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