Back in the 70’s I worked on a radar that had vertical and circular receiver antennas.
When it was raining or snowing, the radar performed better with circular. The theory is, that the echo changes from vertical to horizontal every time it hits an object between the target and the radar.
This works with ground scatter as well. If you point your beam antenna at skyscrapers you can get a lot of vertical, and horizontal, and so a circular would add them together.
Not very practical/cheap though.