nuckolls.bob(at)aeroelect
Guest
|
 Posted: Wed Aug 10, 2011 7:58 am Post subject: Antenna ground plane and nearby cables |
 |
|
At 09:15 AM 8/10/2011, you wrote:
| Quote: |
> No, antennas on the outside of the airplane
> sitting on an existing groundplane (skin
> or tubular structure) or manufactured ground-
> plane are not influenced by adjacent wires
> on the other side of the groundplane.
>
Bob, I mounted my xpdr antenna on a 6" diameter ground plane inside
my composite plane. The tail strobe wire is about 12" away from the
antenna. Would you expect problems with this installation?
|
Define "problems". There will be an effect.
Whether strong enough to offer an observable
difference is subject to much conjecture and
discussion . . . but never quantified without
competent analysis, accurately measured
experimentation or both.
Not trying to be obtuse . . . even the 'big
guys' know few facts that go to your question.
Education is expensive and they're so busy
fighting big fires that mundane details
like performance anomalies in antenna installations
take a distant back seat.
This has been known to come back and 'bite'
in expensive and embarrassing ways later. I
could expound on those war-stories for hours.
Bottom line is, try it. Make notes of situations
where ATC says your transponder is intermittent
or unreadable under conditions where you believe
it shouldn't be a problem. Competent observation
and connection of the dots will out-weigh any
amount of supposition/conjecture on the forums.
But if it worries you, then do the legacy hang-
it-out-the-bottom installation that has proven
to be the best-we-know-how-to-do.
Bob . . .
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
