How to simulate very high meshcell in CST

Hye,
I tried to simulate 46 turns of square spiral coil using CST. But the size of meshcell is 10 billion! So my PC cannot run it. I need to simulate it at range freq 10-20 MHz. Anybody can help me? Any solution to reduce meshcell size?

Instead of time domain solver you can use frequency domain solver for 2D shapes like rfid tag coils, it will be much faster.

If I simulate 46 turns square planar coil, which module I should use?MWS?EM?or Static and Low Frequency? I want simulate at 10-20MHz and get the output of inductance, resistance and Q factor.

You should use Microwave Studio.You can check these links from CST's website. https://www.cst.com/Content/Events/U.../07-Wittig.pdf , https://www.cst.com/Content/Events/d...T_UGM_2011.pdf