Modeling A Schottky diode in MWO

Hi all,

I am trying to model Schottky diode CD7621-000, can anybody help. When I am directly pumping the diode with -10 dBm signal, I am getting a conversion loss of 14.57 dB, which is too low. Approximately the loss should be

10 log (1 + Rs/Rj + w^2*Cj^2*Rs*Rj)

Rj = Junction resistance = around 40 Ohm
Rs = 6 Ohm,
Cj = 0.11 pF

The loss comes out to be 0.6189 dB

Thanks for your help in advance.