> It only takes a few minutes to construct a model of this antenna in K6STI's
> AO program.
>
> All antennas: 14.14 dBi @ 7 degrees
> Upper pair: 12.67 dBi @ 6 degrees
> Lower pair: 11.84 dBi @ 12 degrees
David: Is the "ground gain" a real number?
Hi Mike,
Gain is best understood as a relative (as opposed to an absolute) indicator.
What David cautioned me was to subtract 6dB for "ground gain" and 2.15dB for
"dipole gain". When all is said and done, things end up looking like this in
"reality" (whatever that is <smile>) -- including some information that was on
the graphical plots that Dave (so kindly) sent me:
Dipoles at (1) 50'
(2) 38'
(3) 26'
(4) 14'
Antenna First---Lobe---Elevation Gain @
Constellation -10dB Max dB -10dB Lobe Max
------------- ----- ------ ------ ---------------------------------
(1,2,3,4) 3-deg 7-deg 15-deg 14.14-6-2.15=5.99 dBd
(1,2) 3-deg 6-deg 11-deg 12.67-6-2.15=4.52 dBd
(3,4) 4-deg 12-deg 34-deg 11.84-6-2.15=3.69 dBd
There are many aspects to a proper antenna analysis...the above is only
one...but it answers your question (I think).
Kind regards,
Ev, W2EV
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