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RFX2401C Schematic difference

Posted: Sun Apr 01, 2018 6:54 pm
by droneguy
Hi all,
The Crazyflie2.0 Rev.C schematic for the RF stage of the RFX2401C is significantly different from the suggested circuit.
Does his affect the performance in any way? If not, on what basis was the C-L-L network chosen?

Here's what the RFX2401C suggests:
RFX2401C.JPG
And here's what the crazyflie 2.0 shows:
CF2RevC.JPG
Any help would be highly appreciated.

Thanks!

Re: RFX2401C Schematic difference

Posted: Sun Apr 01, 2018 7:13 pm
by droneguy
And this is what the datasheet for the antenna suggests:
2450AT18B100E.JPG
So basically, the CF2 Rev.C doesn't match any of the suggested RF biasing :/

Any ideas, anyone?

Re: RFX2401C Schematic difference

Posted: Tue Apr 03, 2018 9:07 am
by arnaud
Hi,

The circuit matches the documentation of the antenna. The exact component values have been tuned specifically for the Crazyflie design (using a prototype and a Network Analyser).

Re: RFX2401C Schematic difference

Posted: Tue Apr 03, 2018 1:22 pm
by droneguy
Aah! that's exactly the answer I was hoping for :)
Thanks arnaud!