grendhell
Member level 1
dielectric resonator coaxial probe
Hi, I'm trying to implement a DRA fed by a coaxial line using FDTD in Matlab.
I'm following the implementation exposed in :
A coaxial probe feed model for FDTD
Microwave and Optical Technology Letters
Volume 34, Issue 3, Date: 5 August 2002, Pages: 193-198
Riku Mäkinen, Ville Kangas, Janne Lahtinen, Markku Kivikoski
The code seems to work but I have problem with stability. I have to choose a smaller time step than the Courant limit one, sometimes 10 times smaller. Obviously this increase the computational time.
I don't know if instability can be removed or it's just a consequence of BCs between cable and DRA.
I have noticed (but I don't know if it's a general rule) that instability arises when the DRA permittivity constant is higher than the coaxial cable one's.
Does anybody know if it's possible to increase stability and how?
Does anybody know another more stable way (closer to the Courant limit) to couple coaxial line and DRA?
Thanks a lot
grendhell
Hi, I'm trying to implement a DRA fed by a coaxial line using FDTD in Matlab.
I'm following the implementation exposed in :
A coaxial probe feed model for FDTD
Microwave and Optical Technology Letters
Volume 34, Issue 3, Date: 5 August 2002, Pages: 193-198
Riku Mäkinen, Ville Kangas, Janne Lahtinen, Markku Kivikoski
The code seems to work but I have problem with stability. I have to choose a smaller time step than the Courant limit one, sometimes 10 times smaller. Obviously this increase the computational time.
I don't know if instability can be removed or it's just a consequence of BCs between cable and DRA.
I have noticed (but I don't know if it's a general rule) that instability arises when the DRA permittivity constant is higher than the coaxial cable one's.
Does anybody know if it's possible to increase stability and how?
Does anybody know another more stable way (closer to the Courant limit) to couple coaxial line and DRA?
Thanks a lot
grendhell