grendhell
Member level 1
fdtd for dielectric resonator antenna
Hi, I'm simulating Dielectric Resonator Antennas with an in house FDTD code. When the DRA has low permittivity, say around 20-30, few thousands time steps are enough to calculate the S11 parameter. When I use higher permittivities, the more time steps I use the more confused S11 plot I get; with confused I mean lots of resonances/minimums. It seems that less time steps give a better response. I was wondering what is the cause of that: round-off error? coarse meshing?
should I introduce losses in the dielectric/air? what do you suggest?
thanks a lot
Hi, I'm simulating Dielectric Resonator Antennas with an in house FDTD code. When the DRA has low permittivity, say around 20-30, few thousands time steps are enough to calculate the S11 parameter. When I use higher permittivities, the more time steps I use the more confused S11 plot I get; with confused I mean lots of resonances/minimums. It seems that less time steps give a better response. I was wondering what is the cause of that: round-off error? coarse meshing?
should I introduce losses in the dielectric/air? what do you suggest?
thanks a lot