Properties of Silicon Carbide

Hi,

I am modelling high power waveguide loads on HFSS and CST. One material I need to model is silicon carbide. I cannot find anywhere a resourse that has the magnetic loss tangent and permeability. Also anything I find for the permittivity and electric loss tangent seems to contradict other sources. If anyone has or knows where I could find these properties I would be very grateful, they are at 2-20GHz.

Thanks

JHS

see below:http://www.qualitymaterial.net/products.html

SILICON CARBIDE MATERIAL PROPERTIES
Polytype Single Crystal 4H Single Crystal 6H
Lattice Parameters a=3.076 ? a=3.073 ?
c=10.053 ? c=15.117 ?
Stacking Sequence ABCB ABCACB
Band-gap 3.26 eV 3.03 eV
Density 3.21 · 103 kg/m3 3.21 · 103 kg/m3
Therm. Expansion Coefficient 4-5×10-6/K 4-5×10-6/K
Refraction Index no = 2.719 no = 2.707
ne = 2.777 ne = 2.755
Dielectric Constant 9.6 9.66
Thermal Conductivity 490 W/mK 490 W/mK
Break-Down Electrical Field 2 – 4 · 108 V/m 2 – 4 · 108 V/m
Saturation Drift Velocity 2.0 · 105 m/s 2.0 · 105 m/s
Electron Mobility 800 cm2/V·S 400 cm2/V·S
hole Mobility 115 cm2/V·S 90 cm2/V·S
Mohs Hardness ~9 ~9