#### boy

##### Advanced Member level 1

**modeling frequency dependent resistor**

How can I define a frequency dependent resistor? I have tried a normal lump resistor with R=k*sqrt(freq). ADS does not like that. It told me to use Equation base component. I used one port z-parameter equation base component with Z(1,1) = k*sqrt(freq). It is ok for S-parameter simulation but when I ask for Z-paramater data in S-parameter simulation. All Z parameters are zero. Any better way to define a frequency dependent resistor?