Help needed to understand the spice model of a PIN-diode

Hi,
I need a PIN-diode model for building an attenuator. from Infineon Technologies - Semiconductor & System Solutions - Infineon Technologies I got the spice model of a PIN-diode. But I am using ADS for building that attenuator. I didn't used Spice. So, can anyone help me to understand the spice model of that diode or can anyone draw the PIN-diode schematic for me?

************************************************** *******************
***Si-PIN-diode BA595:
**********************
*
.SUBCKT BA595 100 200
*Package SOD323:
L1 1 10 0.55nH
C2 10 2 110fF
L2 10 100 0.67nH
L3 2 200 0.55nH
*RF Resistances: R1,R2,and G1
R1 1 3 124.8206m
R2 3 4 35.6857k
R4 1 2 200e9
G1 3 4 POLY(2) 3 4 9 0 0 0 0 0 73.7937m
*Constant reverse-bias capacitance
C1 3 2 134.0f
*Junction diode
D1 4 2 DIO1
*Reverse-bias clamp
G2 0 5 4 2 1.0
D3 0 5 DIO3
V1 5 6 0.0
D4 6 0 DIO3
*Calculation of fractional power current
H1 7 0 V1 1.0
V2 7 8 0.0
D2 8 0 DIO2
*Fractional power current to voltage conversion
F1 0 9 v2 10.0
R3 9 0 1000.0
.MODEL DIO1 D(IS=33.7179p N=1.2196 TT=2.1u
+ XTI=3.0 FC=0.5 EG=1.16 BV=69.5 IBV=1.0e-9)
.MODEL DIO2 D(IS=1.7137p N=1.37029)
.MODEL DIO3 D(IS=1E-20)
.ENDS BA595

You can import and use SPICE files in ADS:

YouTube - ‪Spice File Import in ADS.mp4‬‏