"Tom Ring" wrote in message
. ..
Dave wrote:
I am wondering what type of antenna has -19 or -23 dBi gain. I would
speculate that they are quite omnidirectional, and the patterns wouldn't
be significantly different.

It's tough to get gain that low unintentionally. If they are
commercial, could you please point me at a web site? I'd love to see
why they made these.

tom
K0TAR

but 0dBi would be perfectly omnidirectional by definition. either he is
reading the scale wrong or is looking at f/b ratio instead of gain, or
maybe looking at depth of a null or sidelobes.

Actually they could have gain that low and still be directional. It would
probably be silly to do so, but with nice lossy components, quite
possible.

Heck, I bet someone here may have even done something like it for some
reasonable engineering design.

tom
K0TAR

Do a little research on the Flag or pennant antenna.
It's a rotatable antenna that has a good f/b ratio at low
frequencies. I've measured 40db f/b at 1430khz.
I have a variable termination.
Mike