- Fri Dec 12, 2014 1:36 pm
#4692
Of course. Also, I think most important for making such diagrams, which IMHO are not so important here, is the mechanical apparatus and then just some silent place in the basement. But did you try to measure the main lobe (arrangement of antennas to each other) when evaluating the numbers that you posted above?
And do you think connecting RESET directly to VDDA is better than leaving RESET floating? Could you test that? Both options simplify the board layout to quite some degree when compared to an option that utilizes a dedicated pullup-res.
Sjaak wrote:Lars R. wrote:congrats for having a working board. PCB antenna being better than chip antenna is OK.
For measurements you might want to take the following into consideration:
http://en.wikipedia.org/wiki/Radiation_pattern
http://de.wikipedia.org/wiki/Richtcharakteristik
and
http://en.wikipedia.org/wiki/Polarization_%28waves%29
Have a look on how they measure here: http://www.ti.com/lit/an/swra351a/swra351a.pdf (click on links to see measurements for each antenna).
Not expecting such details here but maybe this helps.
I'm aware that antennas have different radiation patterns, but it was just a quick impression, but it is more real live IMHO then in a lab. Dont have the equipment to do it properly
Of course. Also, I think most important for making such diagrams, which IMHO are not so important here, is the mechanical apparatus and then just some silent place in the basement. But did you try to measure the main lobe (arrangement of antennas to each other) when evaluating the numbers that you posted above?
Sjaak wrote:Edit:
Do you think that connecting the RESET pin is required or could it be floating due to internal pullup and due to not being required for programming?
Dunno, but I read in the forums that the pullup is very weak, So I suggest to pull it anyway high with 10k, no suprizes then.
And do you think connecting RESET directly to VDDA is better than leaving RESET floating? Could you test that? Both options simplify the board layout to quite some degree when compared to an option that utilizes a dedicated pullup-res.
