How laser-like could you make a microwave or millimetre-wave in the sense that it would only hit a very small area, concentrated into a small dot on the sensor or whatever device the measuring uses.
You can focus radio wave with reflectors at some point, the same as flashlight or laser doing it. But lower frequency has longer wavelength, so the minimum focus point will limited with about wavelength.
So, if you're trying to focus 10 mm wave, the minimum focus point size will be about 10 mm.
Since laser which works in visible band has about 500-600 nm wavelength, you can focus it into 500-600 nm point.
but after all, I don't see real ways to focus a GHz-beam in the manner you can do it in the spectrum of light with a laser.
You can do it for GHz wave with plexiglass lens, for GHz range beam it works the same as it works for a light.
For example here is demonstration of 10 GHz wave reflection in the plexiglass prizm vs cube:
It also shows effect of near field zone which explain why you cannot focus wave at the point which size is less than 0.5-1 wavelength.
As you can see, if there is a gap between two prizm, with size less than a wavelength, the wave bypass through prizm. But when the gap size is more than 1-2 wavelength, the wave is fully reflected in the prizm.