Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate
that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views.
It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if
you would like to post something on RF Cafe's
page, please do.
Below are all of the forum threads, including all
the responses to the original posts.
Post subject: Gain of a Dipole Versus Height from ground
Posted: Thu Jun 23, 2005 3:24 am
The gain of a dipole is (supposedly) well known
at 2.15 dBi. However, this is only true for a dipole
in free space and in practice most real world dipoles
are going to be plcaed at a finite distance above
ground. Unless I have a large carpet made from RF
absorbent material (NO) then the only other option
to ensure the dipole has the theoretical gain is
to get it far enough from ground that it behaves
as if it is in free space. The big question is how
far does this need to be ? ANYONE CARE TO HAVE A
STAB AT THIS ???