----------------------------------------------------------
                           AeroElectric-List Digest Archive
                                      ---
                     Total Messages Posted Fri 03/27/20: 2
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Today's Message Index:
----------------------
 
     1. 01:12 PM - Re: Revisiting a REALLY handy tool . . .  (blues750)
     2. 03:15 PM - ADS-B Ground Plane Question  (markfw)
 
 
 
________________________________  Message 1  _____________________________________


Time: 01:12:49 PM PST US
Subject: AeroElectric-List: Re: Revisiting a REALLY handy tool . . .
From: "blues750" <den_beaulieu@yahoo.com>


LOL

"...You'll begin to feel sorry 
for the wire and shrink..."

Thanks Bob


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=495454#495454


________________________________  Message 2  _____________________________________


Time: 03:15:12 PM PST US
Subject: AeroElectric-List: ADS-B Ground Plane Question
From: "markfw" <markwheelermd@icloud.com>


I will be mounting a uAvionix echoUAT ADS-B antenna on the belly pan of my cub.
The vendor says to keep it 1 meter from my transponder antenna, which is mounted
14" forward of the leading edge of my belly pan.

The pan itself is an isosceles triangle with a 15" base and a length of 32". The
pointy part of the pan is oriented facing aft.

Thus I have to place my Rami blade antenna toward the narrow (aft) part of the
belly pan to stay 1 meter away from the transponder antenna.

My problem is that at the location that is sufficiently far from the transponder
antenna the belly pan has narrowed so that it does not provide the 5" diameter
circular ground plane that is apparently required.

SO (after all that), my question is whether the ground plane is only the part of
of the belly pan that is immediately adjacent to the antenna, or is it the whole
belly pan?

A related question is whether I can "cheat" the antenna forward a few inches? Since
antenna radiated power varies inversely with the square of the distance does
that imply that I could move the antenna 6' - 8" closer to the transponder
antenna without a significant problem?

I am just trying to establish what my boundary conditions are with respect to the
antenna location.

Thanks.

Mark


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=495455#495455


 

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