John,
Thanks once again for the precious advices. As I’ve put the antenna exactly as I t has been manufactured, could I simply populate the matching network instead of stretching the spirals ? C-L-C network is planned on the pcb, it only misses the parts. I’ve installed simsmith software. Once I’ve put the values from the vna, I will be ready to order the correct caps and inductor to match.
I measured my ground plane yesterday night after posting and it does not have exactly the same size as provided in the data sheet. Mine is a little bit wider and shorter. I would suspect that does not help.
If I want to give it a try and stretch or squeeze the spacing, which direction will increase or decrease the résonnant frequency ?
Thanks,
Nicolas
