On Dec 13, 5:27 pm, Cecil Moore wrote:
Cecil Moore wrote:
David Ryeburn wrote:
However, loaded mobile antennas presumably radiate, at least a little,
and my analysis (and W5DXP's discussion of angle lengths of
transmission lines and "phase shift" at their junction) is for
*LOSSLESS* transmission lines. This makes me wonder.

The current conditions for a mobile antenna can be simulated
by a lossy transmission line made out of resistance wire.
The equations simply include the losses.

The energy content of a 1/2WL dipole is only about 20%
radiated which means that 80% of the energy doesn't
radiate, quite like a lossy transmission line.

Can you expand on the 20%, 80% above.

For convenience assuming the dipole is lossless, it seems
to me that after the transmitter is turned on, some of the
energy is stored in the antenna, but once the antenna
is charged, all the energy entering the antenna is radiated
until the transmitter is turned off, after which the energy
stored in the antenna is radiated until the antenna stores
no energy.

So everything that goes in to the antenna is radiated.

....Keith