[Hackrf-dev] HackRF Rx Design

[Benjamin Yap]

John,

I believe that's mainly because the Hack RF One uses a 2.3-2.7 GHz transceiver chip (MAX2837) as the main demodulating component. All other frequencies in the rated operational range are passed through filters and the RFFC5072 mixer chip which is probably why performance is degraded. 

Have you tried configuring the gain settings? The front end LNA is rated til 6GHz and the MAX2837 has an IF and BB gain which totals up to about 90+dB max. Not sure about their performance though.

If you're planning to apply a custom downconverter before the antenna port, it's probably best to downconvert it to somewhere between 2.3-2.7GHz, or else you'll likely be adding more components (losses) into the RF chain.

Ben


> > I am building a prototype for a project and think I need a more sensitive
> > HackRF One that is Rx *only* from 4GHz -5GHz. I tried using the HackRF
> > One for sensitive measurements around the 5GHz band and was unable to
> > discern any measurable signal with/without the EMI kit and conducted the
> > same tests with another HackRF One user and we arrived at same conclusion.
> > The Rx sensitivity rolls off around 3GHz.  I tried a low noise amplifier in
> > attempt make any signal stand out to no avail.
> >
> > I have an organization that wants to help me manufacture my prototype but
> > I do not have a PCB design to share nor am I capable.  Is there anything
> > anyone could recommend for me to pass on to them that could assist with
> > overcoming this roadblock.
> >
> > I need a basic design to get the wheels rolling and the rest will be
> > handled by developers (so I have been told).
> >
> > Thanks,
> > John

 		 	   		  
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