For two meters, a 5/8th wave antenna has the best omni gain.
But I think the lobe is very low takeoff and not good for mountain work.
What is best for the mountains on a mobile?
Yes, I know not much is going to get over mountains at 144Mhz and above but I want to know what will work best?
•For repeaters on mountains
•And for simplex to other vehicles in repeater "dead zones"
Terrain at 39.501419 , -106.15162650000002
Time for the Constraints
•The antenna has to magnetically mount to the roof of a vehicle, which is a van. I have a very strong Tri-magnet mount. (unless someone can think of a different way without manipulation of the vehicle in any way).
•The antenna can not take up much horizontal space due to bicycles on the roof nearby.
•By much I mean nothing more than a 10cm by 10cm block horizontally at the base and up to the height of a bicycle.
•The antenna can not be taller than the street regulations for traffic lights, power lines, etc (obviously)
•Weight does not matter
•The antenna should not pop off the roof
•I want to optimize for best signal strength to other stations.
•Power I will be running - 50 watts
•Band- Primarily VHF, but maybe a bit of UHF. Optimize for high performance in VHF.
•Max speed of vehicle will be 60 Mph on a highway stretch, so wind strain should be taken in consideration, but not importance (as long as the antenna doesn't fall off).