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Radio aerial groundplane

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bw(at)llanddewi.plus.com
Guest

Posted: Wed Mar 21, 2007 3:11 am Post subject: Radio aerial groundplane

Hi Bob and list.  

Have been following list for some time, really excellent source of information.  

I have a carbon fibre shell aircraft, Pioneer 300, can I use the carbon fibre belly pan as a ground plane  or should I fit a separate one.  

The same question is asked about the transponder aerial, and how far from the comms aerial should it be.  

Thanks for great list.  

Brian  

     

   

  

   

       [quote][b]

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nuckollsr(at)cox.net
Guest

Posted: Wed Mar 21, 2007 5:39 am Post subject: Radio aerial groundplane

At 11:05 AM 3/21/2007 +0000, you wrote:



 	  Quote: 	
		  Hi Bob and list.



Have been following list for some time, really excellent source of 

information.



I have a carbon fibre shell aircraft, Pioneer 300, can I use the carbon 

fibre belly pan as a ground plane  or should I fit a separate one.


	


   The carbon fiber is about 1000 times the sheet resistance

   of aluminum and does not make a good ground plane. You'll

   need to use "radials" on the comm antennas and either radials

   or a full disk ground plane on the transponder antenna. VOR

   and GPS antennas generally do not rely on groundplanes for

   proper operation.

 	  Quote: 	
		  The same question is asked about the transponder aerial, and how far from 

the comms aerial should it be.


	


   As far as practical but certainly 36" is plenty. Don't

   loose any sleep over it if it's only 20".



   Bob . . .



        ----------------------------------------

        ( IF one aspires to be "world class",  )

        ( what ever you do must be exercised   )

        ( EVERY day . . .                      )

        (                  R. L. Nuckolls III  )

        ----------------------------------------

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