Roy Lewallen wrote:

Hate to break the news, Walt, but it happens very, very often. Even years
ago, when I was doing some consulting work on a patent case and read a
couple of hundred antenna patents, there was a great deal of pseudo- and
voodoo-science in issued patents. These days, it's rampant.

My favorite example is US patent #6,025,810, "Hyper-Light-Speed Antenna",
but I'm sure even this is far from the most egregious.

Roy Lewallen, W7EL

Walter Maxwell wrote: I f there really is an issued patent on the EH
antenna, the paragraph above is proof that the Patent Office examiner
who approved the patent application for issuance was completely snowed
by the applicant's patent attorney who wrote the application. This
doesn't happen too often, but it does happen. Unless the patent examiner
is extremely well versed in electromagnetic theory he could easily be
persuaded that the EH principle is valid, while it is not. Walt
Maxwell, W2DU


Firstly, sorry for the 'e' in 'fraud' which does not belong there. In
fact, I asked for help from the hams' fraternity ('all the people know
all' ) - and in connection with the US PTO patent No. 6,486,846 B1,
issued on November 26, 2002 to Robert T. Hart. I live on the fifth floor
of a condominium building, and like many hams, I have no space on the
roof for a proper antenna. So, an EH-antenna would be ideal - if it
worked. I have not tried to build it yet, but I am trying to learn
about it as much as possible before that.

Obviously, my question has two aspects: a practical and a theoretical
one. The practical one: "The proof of a pie is in eating it." Has
anyone built it and can testify it is successful at least as much as a
standard dipole - according to the inventor's statements? I have not
found such an answer yet.

The theoretical one: My theoretical education in that field is rather
amateurish, but still I think I can put some questions: On the
EH-antenna homepage (http://EH-antenna.com) I found a statement that
in the classical dipole the E and the H fields are a result of a LINEAR
movement of electric charges, while those fields in the EH-antenna are
a result of the ROTATION of those charges - a feature unknown until now.
Nowhere in textbooks could I find any word about this possible
phenomenon. In science discoveries must be double confirmed at least,
but here this is not the case.

By the way, it was interesting to read that once an issued US Patent
was a guarantee that the patent at least worked, but today it
seems it is only a certificate that someone was the first to register
his idea or wouldbe invention. If so, I could even understand that,
because today the USPTO should have armies of different experts and
endless laboratories to test all the applications. However, it would
be fair to openly proclaim such a principle. In my country (Croatia) the
situation is similar. (The other day I read in the newspapers that
someone got a patent for superconductivity at normal temperatures
(through some alloys), although, to my knowledge, nobody saw it work.)
Imagine a coil without ohmic resistance, or long distance lines without
any losses!

I am still dreaming about an ideal antenna having not more than 10% of
wavelength and 100% efficiency. Thanks for all the posts, anyhow.

Bozidar, 9a2hl