SAR (Specific absorption rate and frequency)/Simulationt in HFSS

Hi,

As frequency increases the penetration depth in tissues decreases, hence the SAR must be reduced...

In HFSS, SAR settings kept the default values in material density and mass of tissue

that is 1gm/cm^3 and 1 gm respectively..

what should be the values actually need to be entered?

I am simulated with a 50*50 cm three layer body model...

placed antenna vertically upwards..

While simulating random SAR values are coming.. most of the times as frequency increases SAR increases..

why ? plz help...

there are different standards, which should you follow?
1g and 10g?