[Hackrf-dev] HackRF Rx Design

[Cinaed Simson]

On 07/15/2016 03:34 PM, John Wright wrote:
> Something like this?
> 
> http://www.ebay.com/itm/93T2024-Linear-Technology-Ltc5544Iuf-Pbf-Ic-Mixer-Downconverter-4-6Ghz-Qfn-16-/261498815228?hash=item3ce28b42fc:g:3FoAAOxyJypTkUM9

Hmm, yes and no.

Yes, that's the idea - but no, don't buy it from that person - the chip
only costs $12.10

  http://www.linear.com/purchase/LTC5544

Also, there's the

  http://www.linear.com/product/LTC5548

which goes from 2 GHz to 14 GHz with an IF of DC-6 GHz also - and costs
$13.58.

Enclosed is an image of the demo board which costs $125 for the LTC554
and $200 for the LTC5548.

Considering that the chip looks like it might fit inside of female SMA
connector, the demo board might be worth the cost.

You can also use them as an upconverters.

-- Cinaed

> 
> On Fri, Jul 15, 2016 at 3:27 PM, John Wright <cooljohnwright at gmail.com
> <mailto:cooljohnwright at gmail.com>> wrote:
> 
>     I would love to try a 4-6Ghz downconverter.  Could you recommend one
>     for me?  I am not familiar with them or this practice.
> 
>     On Fri, Jul 15, 2016 at 3:23 PM, Cinaed Simson
>     <cinaed.simson at gmail.com <mailto:cinaed.simson at gmail.com>> wrote:
> 
>         On 07/14/2016 03:20 PM, John Wright wrote:
>         >
>         > 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 believe the gain between 4-6 GHz is 0 dBm to -10 dBm.
> 
>         Maybe slap a 4-6 GHz down converter to 2 GHz in front of the HackRF?
> 
>         I've never done it but I did spend the night at a Holiday Inn.
> 
>         >
>         > 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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> 
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> 

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