Looks cool, except it uses USB2 which seems rather limiting in view of bandwidth.

480 Mbps is plenty for low GHz signals. 1GHz gives you 20MHz to play with, which turns into about ~100 Mbps max. A 6GHz signal pulling out all the stops will give you at ~1.6Gbps, but if you're dealing with data that extreme you're barking up the wrong tree with a cheap SDR like the HackRF.

Yeah I dont know any SDR above 6GHZ but also other than mmwave 5G I also dont know much radio that is above 6Ghz in general

Quite a few radar systems are in the 8-10GHz range and satellite communications just above that. The general idea when using a SDR for these things is to have a separate frequency converter & amplifier at the antenna feed itself, then have an intermediate frequency <6GHz fed via cable to the SDR. Tends to be much easier and cheaper this way.

Here you go, from the US perspective:

https://www.ntia.gov/files/ntia/publications/2003-allochrt.p...

for anyone reading this actually interested, just FYI an improved model "HackRF Pro" is due for release in the next month or so, is backwards-compatible, and is what will come in at that $400 price tag.

years ago, there used to be a very abundant market for used or chinese clone HackRF One units, but i haven't been able to find any these days.