In article ,
"ccwillwerth" wrote:

Hi, I am about ready to cover my Cub type airframe, but need a place to
attach a com antenna. I was considering brazing a plate to the airframe so
that it would be just under the fabric. The antenna is the type that has a
ceramic insulator on the bottom of the antenna that insulates the stainless
steel antenna from the airframe. Does the antenna need a large plate for a
ground plane or will a small plate be sufficient? If a ground plane is
required, can the copper foil tape be used on the inside of the fabric as
the ground plane?

Charlie

The ground plane should extend an antenna length around the antenna base.

Copper or aluminum tape will serve the purpose very well. This is
outlined in CAM 18. Make sure that your ground has a good electrical
connection with the elements of the ground plane.