2020-05-22 12:42 PM
According to this values on eDesign Suite:
What would be the resistance of the entire trace, from one edge to other, in ohms? NXP calculator gave result as 2,05 ohms on their tool. But I am here to ask what would be the actual resistance of the antenna above? I need to know the resistance to calculate the EMI filter and coupling components.
Can I rely on that 2,05 ohms value?
Regards.
Solved! Go to Solution.
2020-07-28 09:17 AM
Hello,
a simulation of your antenna leads to 2 ohms for the real part of impedance at 13.56MHz.
By experience, this result shall be multiplied by 1.5 or 2 to fit with measurements done using network analyzer or impedance analyzer.
best regards,
Feel free to contact us for more information,
Henry Crane NFC/RFID support.
2020-05-22 03:56 PM
I have used some online copper trace resistance calculators and had result of around 1.6~1.65 ohms.
parameters are:
I got that 1.6ohm result on 5 calculators, so it should be correct. And I will use that value on the ST25R95 filter and matching calculation.
I just need to know the correct value to input it on the spreadsheet.
Current layout of NFC is on right:
2020-07-28 09:17 AM
Hello,
a simulation of your antenna leads to 2 ohms for the real part of impedance at 13.56MHz.
By experience, this result shall be multiplied by 1.5 or 2 to fit with measurements done using network analyzer or impedance analyzer.
best regards,
Feel free to contact us for more information,
Henry Crane NFC/RFID support.