Re: dipole antenna for sunlight

Don posted:

"Photonic lattice inclusion completely solves the reradiation problem.'

Don, can you explain this concept to me. It appears to be missing in
my pysics texts, optics texts, optical electronics texts, and just
about everywhere I have researched or referenced.

Have you been hanging out a little too long in the .alt newsgroups
recently? :-) (Just kidding.)

Considering the excellent technical content of the articles posted on
your website, I simply have to wonder where you came up with "Photonic
lattice inclusion", exactly what it is, and how it relates to the topic
of this thread -- Antenna capture of solar radiation.

As a physicist I tend to believe that the only way a photon can be
totally captured is when it contains a discrete quantity of energy
(e.g., q = hf) precisely equal to result in a quantum energy level
shift available to an orbital electron of a specific element. To my
knowledge, there are no exception.

With respect to black body absorbers, physics tells us that their
absorbtion coefficient precisely equals their radiation parameters. In
other words, the best absorber is simultaneously the best radiator.

On the other hand, with a multiple antenna array, by its very nature it
is tuned to a specific frequency, wavelength, or color of light. Since
the incident sunlight is black body radiation covering a range of
wavelength some of which would be absorbed while others pass through or
are reflected, this factor must be considered in predicting the energy
efficiency of the array. If we assume that the specture were to be as
low as 640-nm (the ultraviolet) to as high as 8,000, the near (or is it
far?) infra-red, which of these wavelengths are you going to tune your
antenna array to efficiently receive energy? This is precisely why this
micro-antenna array method of solar energy interception is doomed to
failure.

Blackbody solar absorbers seem to work reasonably well if the heat is
rapidly removed from them and shifted elsewhere, but still their energy
capacities are sharply limited and certainly nothing that would
produces a significant energy asset in the nation's future.

Maybe it's time for a little more research into this subject.

Kindest regards, Harry C.

.

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