[tjohns]

Yes, and more...

You can use different antenna designs for a more directional radar beam. Or tilt the beam upwards to steer it around obstacles.

You can also build a moving-target detector by looking at doppler shift to filter out objects that are moving too slowly: https://en.wikipedia.org/wiki/Moving_target_indication

[egberts1]

Curly blades makes it harder to lower its radar surface areas.