Free 3D Maxwell's equations solver for cylinder cavity resonator?

[Calvin Guan]

Hi,

I'm trying to build an air filled cylinder cavity resonator excited by
coaxial probe like thisview using fix font)


port1 50 ohm coax feedline port 2
| |
| ___________________ |
| | | |
| | | |
V | | V
-------- --------
---------- -----------
-------- --------
| |
| || |
|-------||----------
^
tuning screw

The coax probe is expected to excite the E field inside the cavity. The
resonator is expected to work in TM011 mode. I want to solve the E and M
fields inside the cavity and get the S parameters giving the size of the
cavity, the probes and the characteristics of the metal. My EM theory tells
me this configuration should work. I'm not a paid RF/MW engineer or an
academic so I couldn't afford the commercial EM solver. This is a hobby
project. Does anyone know if there is any free solver can handle this
problem? Is this problem best solved by FDTD? How about MoM and FEM?

thanks,
Calvin

 

[Calvin Guan]

No answer?

I did a lot of research and knew that this is not a simple problem as I
thought. I think I need to code my own fullwave solver and hopefully make it
available for free if I ever get it working.

 

[[email protected]]

No answer?

I did a lot of research and knew that this is not a simple problem as I
thought. I think I need to code my own fullwave solver and hopefully make it
available for free if I ever get it working.

Try this

http://www.alphaworks.ibm.com/tech/eip

 

[Calvin Guan]

I worked on my own 3D fullwave solver on and off. Now it's WORKING - well
kind of. From my simulation, I found it easier to rearrange the probes to
excite the cavity in TE011 instead of TM mode. It's easier for me to build.

Calvin