Two stacked 435 MHz yagis for fixed mounting?

been looking at this interesting Twitter post from @PE0SAT where he is using a fixed yagi at 30 degree elevation and comparing with an omni turnstile antenna:

I had plans for building a turnstile Moxon for 435 MHz but now I’m thinking of using two fixed yagis, both with elevation at 30 degreee. One pointed 270 degree and the other one pointed 90 degree. Then stacking the antennas (with coax cable for power divide).

What do you think about this solution? Comments?


I’ve considered the same idea. Fixed yagi for a preferred direction due to topography, obstacles, local RFI, location of other stations (ex: on a coast, aim over water to improve coverage where there are no stations). For dual yagis mounted in opposing directions and connected in parallel, the 2nd will collect noise and interference, may hurt more than help. Easier IMO would be 2 separate stations, one oriented 090 and the other 270. Or an antenna relay that can be computer controlled to select the desired direction.

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Yes, there could be interference from the 2nd yagi if stacking them, but if it works it can be a very simple solution to improve my UHF RX.
Today I did some tests with my “large” UHF LFA-Yagi (13 element vert pol) at fixed 30 degree elevation. I got several passes with decodes, for exemple this one:

So I think I will go forward with this solution. Stay tuned for more updates later!

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