SAW_Filter (Saw Filter)
Symbol
Available in ADS and RFDE
Parameters
Name |
Description |
Units |
Default |
|---|---|---|---|
Fcenter |
Stopband center frequency |
MHz |
300 |
IL |
Passband insertion loss |
dB |
15 |
BWpass |
Passband edge-to-edge width |
MHz |
50 |
Apass |
Attenuation at passband edges |
dB |
1 |
BWstop |
Stopband edge-to-edge width |
MHz |
70 |
Astop |
Attenuation at stopband edges |
dB |
40 |
GDelay |
Group delay |
sec |
0.4 |
Aripple |
Passband amplitude ripple |
dB |
0.5 |
PhaRipple |
Passband phase ripple from linear phase |
deg |
None |
MaxRej |
Maximum rejection level |
dB |
|
Zin |
Input impedance |
Ohm |
50 |
Zout |
Output impedance |
Ohm |
50 |
WindowType |
Window type applied to impulse response: 0=None, 1=Hann, 2=Hamming |
None |
0 |
Temp |
Temperature |
°C |
None |
Other |
Output string to netlist |
None |
None |
Range of Usage
BWstop ≥ BWpass
GDelay ≥ π/BWstop
Notes/Equations
- SAW_Filter models the typical behavior of SAW bandpass filters. If the PhaRipple parameter is not specified, the filter will have perfect linear phase.
- To maintain causality, Gdelay must be set to at least π/BWstop.