Well, generally it'd be pretty pointless to choose a Yagi with identical gain to a patch. The usual benefit of a Yagi is that it provides much higher gain than a patch is capable of when you get up over about 9dB. A high gain patch usually ends up being quite large and heavy.

A very high gain Yagi can be quite long, but otherwise is pretty light, and of course very easy to aim exactly where you want. But assuming they did have equal gain, one benefit to a Yagi is that, at least in the lower frequency bands (like 900Mhz and 1.3Ghz) they don't need an external ground plane to be maximally efficient, while often the patch antenna works best quite close to the physical ground.

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This means you can mount a Yagi on a high tripod to get over ground clutter (grass/bushes etc) and know you're getting the full gain. With patches it's often a balance between having it high enough to get clear LoS, but low enough to get highest gain. That's why I use diversity with one on a tripod and the other on the ground. The most practical difference though is that Yagis just almost always have a much narrower beam width (thus their higher gain) and it's very one sided in the forward direction. You generally can't fly very far to the side or behind a Yagi, while a patch sitting on the ground can almost act as an omni. These are all generalizations though. I'm sure someone will jump in and tell you that they can fly a mile behind their Yagi and they mount their 900Mhz patch 7 feet up on a pole.

Here is a link to my 2.4GHz 18dB panel antenna with polar traces And here is one to a 2.4GHz 18dB Yagi antenna with polar traces With respect to multipath – is this a genuine issue which FPV flyers encounter? I’m only asking because multipath issues were something I believed only concerned reception in heavily built-up areas, like trying to get a GPS signal in a city? Most people fly from large open areas where there is little for the signal to bounce off. Also, I’ve often read in these forums that a panel antenna needs to be close to the ground to work best. Again, is this really the case?

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Prins afc software v2 rocket fuel. I have no scientific evidence to say otherwise, but it’s something I’ve only ever seen stated in this forums and FPV use aside, panel antennas are widely deployed and they’re normally mounted up a pole just like every other antenna. Also, I’ve often read in these forums that a panel antenna needs to be close to the ground to work best. Again, is this really the case? I have no scientific evidence to say otherwise, but it’s something I’ve only ever seen stated in this forums and FPV use aside, panel antennas are widely deployed and they’re normally mounted up a pole just like every other antenna. I've never seen the effect described.

I always mount my panel/patch antennas high up so I don't have to worry about disturbing the Fresnel zone and hence can fly further out without having to worry about the antenna being blocked. Having the antenna on the ground means flying further out becomes impossible as the ground itself blocks the LOS required. Cheers, Sander. Here is a link to my 2.4GHz 18dB panel antenna with polar traces And here is one to a 2.4GHz 18dB Yagi antenna with polar traces With respect to multipath – is this a genuine issue which FPV flyers encounter?

I’m only asking because multipath issues were something I believed only concerned reception in heavily built-up areas, like trying to get a GPS signal in a city? Most people fly from large open areas where there is little for the signal to bounce off. Also, I’ve often read in these forums that a panel antenna needs to be close to the ground to work best. Again, is this really the case? I have no scientific evidence to say otherwise, but it’s something I’ve only ever seen stated in this forums and FPV use aside, panel antennas are widely deployed and they’re normally mounted up a pole just like every other antenna. I wish I had a wide open area to fly as you mentioned.