billhuntersemail(at)gmail
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 Posted: Wed Jul 22, 2020 4:07 pm Post subject: Transponder and/or ADSB Antenna Installation and Radiation |
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Greetings,
I am a member of a composites aircraft community and the question came up (again) about the installation location of these high frequency antennae.
Assuming that the airplane is build of mostly fiberglass (and not carbon fiber) there is the temptation to mount these two antennae inside the airframe so that the antennae are fully enclosed by the fuselage and the airplane is more aerodynamic…sounds good so far…and each antenna will have a ground plane.
So the questions are:
-Is the ground plane better to be square/ round/ or hexagon/ or some other shape?
-If the diameter of the ground plane cannot be exactly a square and the same dimension as indicated on the installation guide what is the problem(s) with it being slightly to wide or slightly too narrow than spec, or if the antenna is not installed in the exact center?
-The book says the two antennae should be mounted at least two feet from each other so what if they were installed closer…or even co-located on the same ground plane?
-What about mounting these masts near human body parts (ouch)?
-What about mounting these masts near other avionics or other electrical equipment?
Thanks everyone for you kind assistance!!!
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