spongey
Newbie level 5
Frequency dependant port (MWO)
Hi,
I'm modifying/improving a simple microwave oscillator. I have a device's S parameters (oscillator FET) and I'm constructing the rest of the circuit on the output (harmonic filters etc).
In MWO I would like a simulation setup where I have an source port that matches the S22 of the oscillator FET so I can design the circuit to match this.
I can set the usual 50ohm port to a static impedance, ie whatever the impedance at the fundamental is, and do my engineering, but then I also would like to see whats happening at the 2nd 3rd harmonics, and this requires a bit of tinkering, either three simulations in parallel or change the value by hand each time. What would be great is a simulator that swept through my S22 file and set the port impedance at each frequency as it swept through a frequency sweep to calculate the Sparams. I'd get to see the whole picture matched across the full frequency sweep.
I can't just use the Nport block for the FET as this would require me to model the full oscillator circuit, which is already constructed by ancient methods and no model exists. I kinda just want to use the FET's S22 as the port impedance source.
Is this possible? I'm using MWO, happy to hear about other simulators that might do something like this.
thanks :thumbsup:
Hi,
I'm modifying/improving a simple microwave oscillator. I have a device's S parameters (oscillator FET) and I'm constructing the rest of the circuit on the output (harmonic filters etc).
In MWO I would like a simulation setup where I have an source port that matches the S22 of the oscillator FET so I can design the circuit to match this.
I can set the usual 50ohm port to a static impedance, ie whatever the impedance at the fundamental is, and do my engineering, but then I also would like to see whats happening at the 2nd 3rd harmonics, and this requires a bit of tinkering, either three simulations in parallel or change the value by hand each time. What would be great is a simulator that swept through my S22 file and set the port impedance at each frequency as it swept through a frequency sweep to calculate the Sparams. I'd get to see the whole picture matched across the full frequency sweep.
I can't just use the Nport block for the FET as this would require me to model the full oscillator circuit, which is already constructed by ancient methods and no model exists. I kinda just want to use the FET's S22 as the port impedance source.
Is this possible? I'm using MWO, happy to hear about other simulators that might do something like this.
thanks :thumbsup: