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Old April 21st 21, 04:16 PM posted to rec.aviation.soaring
Richard Pfiffner[_2_]
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Posts: 319
Default FLARM Fusion Range

On Wednesday, April 21, 2021 at 7:49:56 AM UTC-7, Matt Herron Jr. wrote:
Thanks for the suggestions Rich.

The tops of the dipoles are very close to the canopy plex (by design) and I think one is even touching. How would the non conducting canopy hurt the signal? I think the frame of the canopy is Kevlar/Carbon (anyone know?) Could that cause reflection/interference? Wouldn't it also hurt transmission as well? (which seems to be fine).


Matt,

Some antenna comments from the Fusion Installation Manual
Ensure that the antennas are not in contact with or close to any other object through which there might be an electrostatic discharge, e.g. the canopy.. When two FLARM antennas are installed, ensure that they are at least 30 cm apart.

The antennas must be mounted vertically since the radio waves are vertically polarized (this is unrelated to the radiation pattern). Up to 15° tilt is normally acceptable.
The antennas must be insulated to protect against electrostatic discharges, e.g. from the human body. Otherwise, the device may be damaged.
When utilizing antenna diversity, ensure that the antennas complement each other in terms of the radiation pattern (fuselage shielding).
Connecting more than one antenna to one RF Port (e.g. via a passive splitter) is not permitted. This will most likely result in signals cancelling themselves out and/or severely degraded range.

Richard
www.craggyaero.com