BPF_Polynomial (Bandpass Filter, Polynomial)
Symbol
Available in ADS and RFDE
Parameters
Name |
Description |
Units |
Default |
|---|---|---|---|
Numerator |
List of numerator coefficients |
None |
list(1) |
Denominator |
List of denominator coefficients |
None |
list(1,1.4,1) |
Gain |
Gain factor |
None |
1.0 |
Fcenter |
Passband center frequency |
GHz |
1 |
BWpass |
Passband edge-to-edge width |
GHz |
1.0 |
StopType |
Stopband input impedance type: OPEN or SHORT |
None |
open |
Z1 |
Input port reference impedance |
Ohm |
50 |
Z2 |
Output port reference impedance |
Ohm |
50 |
Notes/Equations
- This is an S-domain filter.
- Denominator and Numerator are a list of polynomial coefficients.
The transfer function for the filter is:
where
S = j × (Freq/Fo − Fo/Freq)/(Fhigh/Fo − Fo/Fhigh)
and
Freq is the analysis frequency
Fhigh = Fcenter + 0.5 × BWpass
Fo = sqrt((Fcenter − 0.5 × BWpass) × (Fcenter + 0.5 × BWpass))