u/Lopsided-Ad434

seems to have some small issues, but will iron it out as I go along, will post the plots of performance once all is ready!

https://preview.redd.it/rog05hdfxr9h1.png?width=1318&format=png&auto=webp&s=2bce4c2fdab350b0aca639255d28662c39f968bc

This design will be mass produced soon (pre orders welcome), with a case and will support the features below;

1, Bias tee power, both as sink, and as a source. Sinks 4.5V(minimally) at 70mA(max) to power the LNA itself, with option to pass the power upstream for active antennas (such as patches). It can also accept USBC power at 5V with C-C cables to supply power up and downstream of the device.

2, Front end is protected by a SAW filter, to prevent front end overloads especially in urban environments with 5G/LTE deployments nearby or other strong out of band signals such as aircraft/broadcasting.

3, will feature a conductive case that will minimize the effects of local RFI on this device.

4, This design uses a DCDC converter on the input, will accept any voltage from 4.5V to 24V, without becoming very hot, allowing for a wide supply voltage.

And lastly, I intend to price this ~28USD, to stay competitive with the current offerings of the SAWBird, which I intend to exceed in terms of specs and ease of use. Other filters for different frequencies are also available, just state what you wish to have and I have the ability to get it done, such as for Inmarsat L band services

Ships from Singapore to all over the world. Made with love and not a cheap Chinese product.

Design is CC BY-NC-SA 4.0 and available on request.

Helicone antenna was printed from open source files available online, SDR used was a B210 USRP compatible, Software was Satdump.

Used a novel filter LNA design involving triple SAW filters in a SAW-LNA-SAW-LNA-SAW configuration, significantly reducing frontend overload from out of band signals on the first LNA

SAW filters are custom 1.7ghz±15mhz Insertloss 3db filters ordered from HCI.

Carrier board is modified COTS LNA board, replacing the onboard SAWs and adding pads for a 3rd SAW filter by PCB cutting and modifications.

Overall performance meets and exceeds that of COTS Sawbird GOES, in terms of overload tolerance, noise factor, and passband selectivity for 1.7ghz satellites of interest.

edit: last image is of METEOR pass, first picture is of GK2A LRIT reception