Glide Slope Antenna Ground Plane

[JKimmel]

I want to move a glide slope antenna from a flush mount in a metal skin
to a boat type on a carbon fiber fairing which will move the antenna
about 5" below the metal skin. Will the antenna still work if it's
offset from the ground plane like this?

Thanks,
--
J Kimmel

www.metalinnovations.com

"Cuius testiculos habes, habeas cardia et cerebellum." - When you have
their full attention in your grip, their hearts and minds will follow.

[RST Engineering]

Probably not, but why don't you describe the mechanical configuration in a
bit more detail?

Oh, the smartass answer is that of course it will work. So will a wet
noodle in a copper septic tank, just not very well.


Jim




"JKimmel" > wrote in message
...
>I want to move a glide slope antenna from a flush mount in a metal skin to
>a boat type on a carbon fiber fairing which will move the antenna about 5"
>below the metal skin. Will the antenna still work if it's offset from the
>ground plane like this?
>
> Thanks,
> --
> J Kimmel
>
> www.metalinnovations.com
>
> "Cuius testiculos habes, habeas cardia et cerebellum." - When you have
> their full attention in your grip, their hearts and minds will follow.

[JKimmel]

RST Engineering wrote:
> Probably not, but why don't you describe the mechanical configuration in a
> bit more detail?
>
> Oh, the smartass answer is that of course it will work. So will a wet
> noodle in a copper septic tank, just not very well.
>
>
> Jim
>

Sorry, it's not a GS, it's a Marker Beacon. The original antenna is a
Comant CI 164 mounted flush to the skin. The new antenna is a Comant CI
118-1. The flush mounting location for the original Comant is a very
convenient place to put an IR camera, useful for taxiing at night and in
poor visibility. I'm designing a fairing in which to mount the camera
with the antenna bolted to the bottom of the fairing because that's what
the customer wanted. I want to not look stupid if I submit this to a
radio DER.

Here's a picture.

http://www.spiretech.com/~guynoir/images/FAIRING.jpg

--
J Kimmel

www.metalinnovations.com

"Cuius testiculos habes, habeas cardia et cerebellum." - When you have
their full attention in your grip, their hearts and minds will follow.

[RST Engineering]

If the fairing is aluminum, it will probably work quite well. If the
fairing is glass, probably not so very well at all. A few pieces of wide
aluminum strips from the original location to the base of the antenna may
provide you enough of a path to at least have some semblance of a chance of
working.

Jim



"JKimmel" > wrote in message
et...
> RST Engineering wrote:
>> Probably not, but why don't you describe the mechanical configuration in
>> a bit more detail?
>>
>> Oh, the smartass answer is that of course it will work. So will a wet
>> noodle in a copper septic tank, just not very well.
>>
>>
>> Jim
>>
>
> Sorry, it's not a GS, it's a Marker Beacon. The original antenna is a
> Comant CI 164 mounted flush to the skin. The new antenna is a Comant CI
> 118-1. The flush mounting location for the original Comant is a very
> convenient place to put an IR camera, useful for taxiing at night and in
> poor visibility. I'm designing a fairing in which to mount the camera
> with the antenna bolted to the bottom of the fairing because that's what
> the customer wanted. I want to not look stupid if I submit this to a
> radio DER.
>
> Here's a picture.
>
> http://www.spiretech.com/~guynoir/images/FAIRING.jpg
>
> --
> J Kimmel
>
> www.metalinnovations.com
>
> "Cuius testiculos habes, habeas cardia et cerebellum." - When you have
> their full attention in your grip, their hearts and minds will follow.

[Morgans[_3_]]

"JKimmel" > wrote
> Sorry, it's not a GS, it's a Marker Beacon. The original antenna is a
> Comant CI 164 mounted flush to the skin. The new antenna is a Comant CI
> 118-1. The flush mounting location for the original Comant is a very
> convenient place to put an IR camera, useful for taxiing at night and in
> poor visibility. I'm designing a fairing in which to mount the camera
> with the antenna bolted to the bottom of the fairing because that's what
> the customer wanted. I want to not look stupid if I submit this to a
> radio DER.
>
> Here's a picture.
>
> http://www.spiretech.com/~guynoir/images/FAIRING.jpg

Looks to me like the best thing to do, is put the antenna behind the camera,
or the camera in front of the antenna.

How about putting the camera out in front of the antenna, and have the
fairing looking kinda like the oil cooler (or is it the air intake) on most
RV's? You could fair the camera housing back to fit to the antenna, or even
better, use fiberglass, and have the antenna completely enclosed. You could
make it really slick!
--
Jim in NC

[JKimmel]

>
> Looks to me like the best thing to do, is put the antenna behind the camera,
> or the camera in front of the antenna.
>
> How about putting the camera out in front of the antenna, and have the
> fairing looking kinda like the oil cooler (or is it the air intake) on most
> RV's? You could fair the camera housing back to fit to the antenna, or even
> better, use fiberglass, and have the antenna completely enclosed. You could
> make it really slick!

Not enough room.

--
J Kimmel

www.metalinnovations.com

"Cuius testiculos habes, habeas cardia et cerebellum." - When you have
their full attention in your grip, their hearts and minds will follow.

[JKimmel]

RST Engineering wrote:
> If the fairing is aluminum, it will probably work quite well. If the
> fairing is glass, probably not so very well at all. A few pieces of wide
> aluminum strips from the original location to the base of the antenna may
> provide you enough of a path to at least have some semblance of a chance of
> working.
>
> Jim
>
Thanks, Jim. Since I also need lightning protection, I'll probably just
metal spray the whole thing

--
J Kimmel

www.metalinnovations.com

"Cuius testiculos habes, habeas cardia et cerebellum." - When you have
their full attention in your grip, their hearts and minds will follow.