Andrew77

Hi, further improvements for the matching: check this

Have you tried to get the GND closer to the antenna? VSWR gets better! In this case GND plate moved to the antenna by 6 mm

Yes, It Works! Have a nice day!

Hi Dear, Please could you send me the *.stp file? Because I'm using CST2019, Many thanks! Andrea

Gain VS frequency? Thanks!

I already posed a question about this antenna, I made some simulations, have you succeded to simulate it?

mmm interesting, but seems lumped port, I don't understand well... Do you have this example in .cst format?

Sure, The antenna is not matched.. Here is just to check the settings... CST_Article138_RFID Reader-Coil, 13.56 MHz.pdf

I past it again... Simulation are same as mine Did you use Transient solver? if not what mesh? Your bounding box how big is? NFC_13_56_MHz.cst

here is the original antenna: NFC_13_56_MHz.cst

Hi dear,how are you? I made antenna by myself, I understand that corners must be rounded but I started with this version to have a simpler meshing... The version with rounded corners gives me quite the same inductance (around 1.24 uH) I'm looking for the examples inside CST (13.56 mhz coil ) but I have a big db file for examples in CST directory so I don't kown how access Andrea

Hello, I'm trying to design a NFC antenna @13.56 MHz for a reader, Antenna should have around 1,24 uH of inductance as simulation and calculation verified, but i'm not very sure about the set-up of CST (Frequency domain solver) I don't see Self-inductance up to 60 MHz I don't find The example given in the Examples of CST: "RFID Reader-Coil, 13.56 MHz CST example" could someone upload? (CST 2019) Many thanks NFC_13_56_MHz_V2.cst

OOK thanks!

could you post the .cst file for this antenna? thanks

Seems that VSWR and gain go to the opposite direction!