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Antenna Placement ?s

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jvolkober

Joined: 29 Aug 2010
Posts: 12

Posted: Thu May 26, 2011 8:03 pm Post subject: Antenna Placement ?s

I'm building and RV9A.  According to my antenna manufacturer, RAMI, Inc, instructions the antenna should be 24 inches from any other antenna and reflective surfaces, e.g. landing gear.  My plan has been to mount a Com antenna under the pilot and passenger seats with the transponder antenna about 24 inches further aft.  However this would put each of Com antennas within 24 inches of the landing gear and the step.  The only way to avoid this would be to mount them on or about the center line on the belly along with the transponder antenna.  



Question, how much of a problem will I have if the antenna are within one foot to 18inches of the gear or the step.  Secondarily, how much distance should I have between the Com antenna and the transponder antenna, which will also be mounted on the belly about 24 inches behind the baggage bulk head (with the Dynon transponder in close proximity.)

John

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nuckolls.bob(at)aeroelect
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Posted: Fri May 27, 2011 9:43 am Post subject: Antenna Placement ?s

At 12:03 AM 5/27/2011, you wrote:

 	  Quote: 	
		  



I'm building and RV9A.  According to my antenna manufacturer, RAMI, 

Inc, instructions the antenna should be 24 inches from any other 

antenna and reflective surfaces, e.g. landing gear.  My plan has 

been to mount a Com antenna under the pilot and passenger seats with 

the transponder antenna about 24 inches further aft.  However this 

would put each of Com antennas within 24 inches of the landing gear 

and the step.  The only way to avoid this would be to mount them on 

or about the center line on the belly along with the transponder antenna.



Question, how much of a problem will I have if the antenna are 

within one foot to 18inches of the gear or the step.  Secondarily, 

how much distance should I have between the Com antenna and the 

transponder antenna, which will also be mounted on the belly about 

24 inches behind the baggage bulk head (with the Dynon transponder 

in close proximity.)


	


    Probably no effects that you will notice. There's

    very little interaction between VHF comm systems

    an UHF transponder. Do what you can for separations

    but don't loose any sleep over the selected configuration.

   Bob . . .

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