I recently upgraded my setup to an outdoor antenna (A3 made by jetvision), and so far am very impressed by the performance. I have however mounted it, very close to a VHF antenna (Diamond D-777) at the top of a telescopic mast. Whilst the ADS-B performance (constantly over 1000 messages/sec at daytime) is very promising, I’m noticing a lot of interference on VHF: it seems the two antenna’s are disrupting each other.
Here is a picture of my setup:
Does anyone have any ideas how I could mount the antennas to stop them interfering with each other? So far I have considered two options:
a) Raise the telescopic mast another 50 cm and mount the ADS-B antenna directly below the VHF one. In this scenario however, the ADS-B antenna is no longer at the top of the mast, but its top would coincide with the top of the mast (possible 180 degree blockage?).
b) try and implement some sort of mast side-arm to horizontally separate the antennas by 30-40 cm. This however could cause stability issues due to the changed Centre of Gravity given the weight of the antennas at the top of a 5 meter pole.
The above picture is taken from the ground, the telescopic mast is already extended approx 5 meters, this is necessary to clear the UHF TV antenna. This is about as high as I felt would be safe in windy conditions.
If anyone has any ideas, I’d much appreciate it!