Interesting comments Roy
But it does utelize the use of dipoles that are not straight but angled. It
is well known that pointed /angled dipoles does have advantages such as
reducing rotational area, reduction of
reactances that can lead to as much extra gain as 1 Db together with a
broader
banded antenna.
In this particular case he has achieved an extra 3 db by stacking.
Your point regarding direction of main lobs is quite important but lessens
in importance if the antenna is rotatable. Unfortunately I searched the web
page of this new antenna but was unable to find any antenna patterns,
which puts one in a "believe it or not" situation regarding its capability
versus claims.
Art

"Roy Lewallen" wrote in message
...
I presume you realize that a 3/2 wave dipole has multiple lobes, with nulls
between. At many or most angles, a half wavelength dipole has greater gain.

You can get just two narrow lobes from a 3/2 wave dipole by rotating the
wires 30 degrees to form a horizontal "V" having a 120 degree included
angle. I've used this trick with a 40 meter dipole being used on 15
meters -- it doesn't have much effect on the 40 meter pattern. (You'll see
some TV antennas made this way for the same reason -- the high TV channels
are about 3 times the frequency of the low channels.) But again, if a
station isn't in the right direction, you'll do better with a half wave
dipole than a 3/2 wave one.

A "gain" antenna isn't of much use if the gain is in the wrong directions.
In fact, it's worse than a lower gain one, since the higher gain it gets
in a few directions comes at the expense of lower gain in the remainder.

Roy Lewallen, W7EL

Buck wrote:

When trimmed to SWR, I get less than 1.5:1 on fifteen meters. My
plans are to build a multiband antenna, parallel elements, where each
band is 3/2 wave dipoles and fed with 50 or 75 ohm coax. I haven't
tried this yet, but I would hope I can have a few gain dipole antennas
in a multi-band format.