J85
Newbie level 3
Hi,
I'm creating two circuits using ADS for the frequency range 1-100MHz. The circuits will be separated by a 10m coaxial cable. Is it appropriate to model this cable using distributed parameters? I am concerned about the frequency response of the lumped component circuits either side of the cable for the lower frequencies in this range where the wavelength is greater than the length of the cable. Wavelengths are between 300-3m. I'm particularly concerned about any resonances within this frequency range between the circuits and the cable (if behaving as lumped parameter).
When including the cable as a pi model the results are poor. Can anyone shed light on this? Do I need to assess the circuit with both lumped and distributed representation of the cable? I am aware of the various rules of thumb for choosing lumped or distributed components, I would like to know what others do when they have a frequency range that meet both criteria?
Many thanks
Jon
I'm creating two circuits using ADS for the frequency range 1-100MHz. The circuits will be separated by a 10m coaxial cable. Is it appropriate to model this cable using distributed parameters? I am concerned about the frequency response of the lumped component circuits either side of the cable for the lower frequencies in this range where the wavelength is greater than the length of the cable. Wavelengths are between 300-3m. I'm particularly concerned about any resonances within this frequency range between the circuits and the cable (if behaving as lumped parameter).
When including the cable as a pi model the results are poor. Can anyone shed light on this? Do I need to assess the circuit with both lumped and distributed representation of the cable? I am aware of the various rules of thumb for choosing lumped or distributed components, I would like to know what others do when they have a frequency range that meet both criteria?
Many thanks
Jon