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flatulent said:Due to the legal limits on frequency ranges and technology power limits the only ones I have seen are kits and are around 10 GHz and have a detection range of under 100 m.
mr_ghz said:Hi eladg
What range do you need? You can also use a Gunn-source. This is an oscillator at 10GHz or even 24GHz with integrated mixer-diode. These modules have a waveguide output, so you can attach a (self made) horn antenna. Sensitivity is not too bad, with good antenna you can detect movement even above 100m.
If you want to detect static object, there also exist pulse radars. But they are much more expensive.
Bye