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S-March / smarchWatch_Public

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Trying to Figure out the Antenna #44

Closed YudiNz closed 3 years ago

YudiNz commented 3 years ago

Hi, I am trying to see how the antenna works in this situation. I looked through the BOM but couldn't find it.

Looking at the schematics and PCB layout it seems like there is a Pi Network with a trace going to a via at the edge of the board. Is that trace the antenna? is it a 50ohm impedance trace connecting to ground via a via?

Could someone please help me understand this?

Edit: I see issue #39 and issue #35 but now I am trying to understand why the pi network was not needed? does the trace to the via have the required 50ohm impedance? also I understand that the a reason for using 31.25mm is because that's the quarter wavelength or closed to it for the 2.4GHz range

YudiNz commented 3 years ago

Great video regarding the project via an interview by Robert Feranec regarding this. Antenna component is explained here. @45:15 link: https://youtu.be/pKD4kBWA5cw?t=2715

Leaving it here for the future if other people are interested in it too.