"Tom Ring" wrote in message
. ..
amdx wrote:
I'm comparing elevation plots of an antenna. They have different
forward gains, this makes it difficult to compare the lobe shape.

Is there a way to equalize the gains to do a comparison?


Example: I have an antenna that is -19dbi and one that is -23dbi.
Can I add 4db of gain to one to make the comparison easier?
Mike



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
I'm modeling a Flag antenna.
It is a directional antenna.
Small size for the low bands.
Btw, this site has one that has -43dbi gain.
http://taliaphoto.com/n4is/BIG_DUAL_LOOP.html
I'd like to have one!
Mike

Kinda thought so! got copy of THAT loop antenna-
Lots of loss, but abt 28 dB F-B ratio (great for
eliminateing stations off the back, and , as stated
very broadband! And the model at 12 mhz, did to
1.8 MHz , also 28 MHz- swr is flat (20:1)!, but
the directivity is seems to be flat,too. An
interesting antenna. Tks to Bill W5WVO for the
model! But the
4 db diff (on the angles of "radiation", probably
mean little on a change of pattern.maybe 2-3
degrees! (3dB points)! Definately NOT for trying
to xmit to! But with a 20 dB preamp looks like a
great recieve antenna! Jim NN7K


Example: I have an antenna that is -19dbi and one that is -23dbi.
Can I add 4db of gain to one to make the comparison easier?
Mike

I'm modeling a Flag antenna.
It is a directional antenna.
Small size for the low bands.
Btw, this site has one that has -43dbi gain.
http://taliaphoto.com/n4is/BIG_DUAL_LOOP.html
I'd like to have one!
Mike