For a project I had to calculate parameters needed to make nice rectangular PCB inductor for a NFC antenna. Since my search didn't bear desired results, I decided to make my own. Enjoy.
Calculation is done per NXP's AN1445.
22 thoughts to “Rectangular NFC Antenna Calculator”
Thanks alot even im doing project on design and simulation on printed antenna for nfc plz help me i beg u
What is the technical Issues?
So, where is the calculate button?
Just change numbers and it will update automatically.
Not working in Google Chrome, but thank for the calculator.
CloudFlare rocket loader was “optimizing” delivery a bit too much. I have turned it off and now it should work.
It’s Still not working in Chrome
Thank You for your calculator!
Thank you for this calculator. It’s the closest one that I’ve found for my needs. I am however going to be using a 38awg round wire for my application. :( Is there another calculator that you know of that will calculate the inductance of my antenna setup?
How do you measure thickness in oz. Thickness is usually either in micrometer or millimeter, right?
The copper in a PCB is rated in ounces, and represents the thickness of 1 ounce of copper rolled out to an area of 1 square foot. For example a PCB that uses 1 oz. copper has a thickness of 1.4mils (quote from http://www.daycounter.com/LabBook/PCB-Copper-Thickness.phtml).
I am looking for circular NFC calculator.
i want loop antenna calculator for N turns….plz help me..
i need loop antenna calculator for N turns….plz help me..
How to calculate Antenna resistance as per antanna inductunce?
Why is the minimum height only 12mm? I think the math won’t go crazy if the height is, say 8mm, and that’s the height I’m constrained to in my “antenna” design. I’m not doing NFC, but am configuring for 13.56MHz.
It’s combination of factors between track width and a turn count. Due to coupling, a higher turn count than 6 is not recommended (even though script goes to 10). I would advise you to check the full NXP’s AN1445 document (http://www.nxp.com/documents/application_note/AN1445_An1444.zip) as script I wrote is really application specific.
Can this calculator be used for a two layer antenna design? I.e. mirrored tracks on each side of pcb. Thanks.
Not really; those would require different calculations.
Is mil same as mm ?
No, mil is 1/1000th of an inch. Check this calculator.