Some higher-end SDR devices can handle the freq range without a down-converter.
https://www.crowdsupply.com/lime-micro/limesdr-mini-2
https://www.sparkfun.com/products/13001

 

This is a professional RF Spectrum Analyzer made by HP and it costs more than an arm and a leg.
I am not aware of any similar equipment at a budget for the hobbyist.

Youch! OK thanks!