Menu

Discussion Forum

New Discussion
Filter

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

RFID resonance frequency

Posted May 10, 2021, 8:35 a.m. EDT Low-Frequency Electromagnetics, RF & Microwave Engineering Version 5.6 4 Replies

Kelvin Okenye
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hallo, I am new to COMSOL simulations in the RF section. I am designing a spiral RFID antenna which should have a resonance frequency of 13.56MHz. I have a coil with an inductance of 2.96uH (which i verified using the ac/dc physics and calculation) and I place a parallel capacitor using a lumped element boundary condition. The spiral has 8 turns and is made of stainless steel having an impedance boundary condition and the boundary feed is a lumped boundary with a feed of 3.3V. However, my model returns a resonance at about 800MHz. Does anyone have an insight of what I am doing wrong?

4 Replies Last Post May 11, 2021, 6:05 a.m. EDT
Kelvin Okenye
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 4 years ago May 10, 2021, 8:43 a.m. EDT

This is the .mph file

This is the .mph file
Jeff Hiller COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 4 years ago May 10, 2021, 9:04 a.m. EDT

Hi Kelvin,

The file did not get attached. Maybe that's because of its size. You can reduce an mph file's size by clearing the solutions and meshes.

Best,

Jeff

-------------------
Jeff Hiller
Hi Kelvin, The file did not get attached. Maybe that's because of its size. You can reduce an mph file's size by clearing the solutions and meshes. Best, Jeff
Kelvin Okenye
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 4 years ago May 10, 2021, 10:33 a.m. EDT

Hi Jeff, let me try to attach it again

Hi Jeff, let me try to attach it again
Kelvin Okenye
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 4 years ago May 11, 2021, 6:05 a.m. EDT

Hi

Hi Kelvin,

The file did not get attached. Maybe that's because of its size. You can reduce an mph file's size by clearing the solutions and meshes.

Best,

Jeff

Hi Jeff this is the mph file

Hi >Hi Kelvin, > >The file did not get attached. Maybe that's because of its size. You can reduce an mph file's size by clearing the solutions and meshes. > >Best, > >Jeff Hi Jeff this is the mph file

Attachments:

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content