GHz scale to THz...enable by simulation tool!?

[Insang Woo]

Hello.

I am going to try the comparision about two kinds of simple dipole antennas(eaeh 1000 times scaled).
One is (~100mm-long & 3mm-wide) and another is (~100um-long & 3um-wide) which have same metal conductivity and same metal thickness.
The former will operate in GHz, the latter in THz.

Then. they should show same results (*.my interest is in "the antenna input impedance" and "radiaton pattern in directivity") or not ?

!! I am useing two programs. one is IE3D and another is CST MWS.

anyone who know about this topic... advise to me. plz.

 

[irfan1]

It is very important how you model the metals. When making simulations at THz range you should use a realistic model for the material dispersions. You may start from Drude dispersion model.

 

[RFSimulator]

Hi,

Maxwell's equation only scale if you have not losses... As soon as you introduce losses the scaling does not work anymore.

Quick Check:

The Skin depth of a metal with 5.8e7 S/m at 1 GHz is 2.09 µm -> at 1 THz it is 0.07 µm. Scaling would require that it is 0.00209 µm.

F.