This is a band I have never tried. Some people take it very seriously and employ narrowband techniques. Others "play" at the band using wideband FM (WBFM), much as is done with 10GHz.
There are Doppler radar modules available which look as if they could be used at 24GHz. With such units there is almost no need for microwave engineering.
With such units at the focus of dishes, ranges could be surprising. I have never seen designs for 24GHz WBFM units. If you find any, please send me links.
Ranges of a few kilometres might be possible with just the modules alone.
See https://sites.google.com/view/g3xbm4/home/vhfuhfmicrowaves/homebrew/24ghz .
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