But they are comparing it to something buildable on earth by saying "We list
it as having a 5dbd (yes thats dbd) gain over a dipole." I think it is fair
to assume that the reference dipole has the same orientation as the subject
antenna and if not modeling in free space is the same height above ground.
To: <towertalk@contesting.com>
Subject: Re: [TowerTalk] Cage dipole revisited.
From: "K1TTT" Date: Sat, 11 Apr 2009 15:57:50 +0000
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
>
> To use dBd to refer specifically to a dipole in free space is misleading
> marketing BS.
But this is MARKETING, they thrive on things like that. No one says you
have to be able to measure it, or that it could even be compared to anything
buildable on earth. Manufacturers have quoted gain against isotropic to get
those couple extra db in the past, can you build a real isotropic radiator?
Caveat Emptor, ab asino lanam, corruptio optimi pess, bonitas non est
pessimis esse meliorem, adversus solem ne loquitor, etc, etc, etc...
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|