Reg Edwards wrote:

There is an antenna with dimensions as small as 1 / 70th ( 1.43 percent) of
a wavelength which has a radiating efficiency as high as 98.0 percent.

It is a vertical copper tube, 1 metre high (39.4 inches), 25.4 mm (1 inch)
in diameter, operating at 7 MHz.

It is only 0.86 dB worse than absolute perfection, equivalent to a loss of
only 1 / 70th of an S-unit.

It is more efficient than a very high half-wave resonant dipole, using 14
awg wire, at the same frequency. And uses a far smaller amount of expensive
copper.

Has anybody ever applied for a patent for such an antenna which has such an
outstanding performance? And did the Patent Examiner raise his eyebrows at
the claim?
----
Reg.



I don't know of any patents, but these "wonder antennas" are so
"efficient" because they use the feedline as a radiator. The feedline
is just terminated with a huge capacity. There is no magic to this -
it is just bad engineering. Good morning RFI!

Kind regards, Eike