I see a comparison for a single antenna out of their entire portfolio.
That one comparison is against a competitive antenna of unstated boom
length, and it shows the InnovAntenna having the same maximum gain with
a slightly wider beamwidth, better front/side, and better front/back.
Those factors may or may not represent better noise performance
depending upon what azimuthal heading the noise is coming from. If I
assume that the noise is spatially uniform an integral of those two
plots looks like it would calculate out to be maybe one or two db in
favor of the InnovAntenna. If the majority of the noise is coming from
a forward direction (such as when I beam eastward toward the sun) the
plots look like the InnovAntenna would be about three db worse.
I'll accept the manufacturer's claim that the improvements in front/side
and front/back are the result of design flexibilities offered by a loop
configuration, but the net result doesn't seem to warrant the hyperbole
and that's been my only contention all along.
And yes ... I'll be sure to buy a subscription to another magazine so
that I can research all the stuff that's missing from the manufacturer's
own website.
73,
Dave AB7E
On 3/20/2013 12:28 PM, Ian White wrote:
Can it be that some parts of www.g0ksc.co.uk and www.innovantennas.com
are failing to load in your browser?
These are two different websites. g0ksc.com is mainly for homebrew
antenna constructors and includes a large number of designs with
detailed physical dimensions that anyone can model... and many have.
Anyone who is experienced in antenna modeling will already have an
extensive library of their own modelled plots and can make whatever
comparisons they may wish.
Innovantennas.com is the commercial website. The LFA page does include
comparison plots between the 9-element LFA for 6m and a similar antenna
from another company. The comparison antenna is not named (British law
about this form of advertising is tighter than you are accustomed to in
the USA) but once again, anyone with sufficient interest can easily
identify what "KHW" means.
Finally, you can look up the website of DUBUS magazine, which I already
mentioned, and find indexes that list at least 12 articles published by
G0KSC, along with many other articles about Yagi design. These are all
archived in the annual DUBUS-Technik publications which can be ordered
from your national DUBUS representative.
As others have said, the information is all there to be found.
73 from Ian GM3SEK
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