Re: ADSB In - Classic Cozy 3 Antenna Placement Experience
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"You're less likely to go wrong sticking with a more conventional solution"
It looks like you have enough room for a dipole antenna (see my previous picture) if you ever decide to upgrade. It will at least give you better coverage for the volume on the other side of the virtual ground plane and should be more cylindrically symmetric.
Boulder / Longmont CO
On Tue, Jun 23, 2020 at 9:04 PM Marlon Gunderson <sondergun@...
Thanks James, you're right, this is totally experimental and may not work reliably for someone else. I have not done any kind of formal testing, just flown with it for 3 years and checked the FAA ADSB performance test a couple of times a year. It hasn't shown anything other than 0% failures (of about 10K pings/hr) when I've checked but there's nothing to say I won't see some failures in the future. You're less likely to go wrong sticking with a more conventional solution.
On Tue, Jun 23, 2020 at 6:36 PM berkut13 <berkut13@...
It may indeed “work”, but the radiation pattern is going to be significantly affected by the asymmetrical ground plane radials. Could cause some reception issues by ground stations in certain directions. No way to really know without extensive testing.
Virtual ground plane in the strake cavity has worked well for me for an Echo UAT. Good separation from the Mode C antenna under the front seat.
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