Japan solves 5G airliner conundrum: Keep masts 200m from airport approach paths

The LORAN long range navigation system placed transmitters all around the world.

The hardest part of constructing the transmitter was designing "high Q" notch filters for any local frequencies.

Perhaps the 5G transmitters can install such high Q filters.

Do 5G cell phones in the plane have any effect, especially if they are "noisy" near the altimeter frequency?