Re: ADSB In - Classic Cozy 3 Antenna Placement Experience
toggle quoted messageShow quoted text
Hi Richard, You may not be aware of the S53MV annular slot transponder antenna for composite aircraft. It is easy and cheap to make and works with no holes in the airplane; just set it on the floor. It has the advantage that it has about 6 dB gain over a ¼ wave rod or ½ wave dipole giving approximately four times the signal strength.
Note that the original designer told me his design may not work at 978 MHz for ADS-B UAT and it didn’t. I scaled the antenna, see attached, so that it was optimized for 978. If you are going to use it with a 1090 ES ADS-B or Mode C transponder you should use the drawings from the designer, no my attached drawing.
There are at least a dozen people using these in their canards and to my knowledge they are all working well, provided they were made accurately (+- 1/16”). One guy sent me one to test that he had almost ½” errors and that one did not work.
Cozy IV N197DL
Cannon Creek Airpark 15FL
From: firstname.lastname@example.org <email@example.com> On Behalf Of Richard Sessions
Sent: Sunday, June 21, 2020 11:40 PM
Subject: [Canard Zone] ADSB In - Classic Cozy 3 Antenna Placement Experience