DazedAndConfuzed
Newbie level 2
Hello,
I am currently trying to simulate an RF cascade in ADS comprising of two similar LNA's, a fixed attenuator, a digital (programmable) attenuator and a 60 degree/GHz phase shifter. This cascade is to be simulated at 2, 3 and 4 GHz respectively (varying Pin from -10 dBm to 10 dBm) and at each frequency the input TOI, output TOI, system gain and output power of the system are to be determined using ADS. I have included a schematic of the cascade as well as the characteristics of the LNA's. My biggest issue is when I try to run a simple Harmonic Balance (HB) simulation and attempt to plot something as simple as vout (dBm) vs frequency I end up with invalid vout readings.
I had tried to run a Budget type sim but I learned you cannot use the linear components in that sim as I do not know their S-parameters (do they have associated S-paramters?).
Any help at all in terms of creating a meaningful output for the mentioned parameters would be greatly appreciated.
Adam B
I am currently trying to simulate an RF cascade in ADS comprising of two similar LNA's, a fixed attenuator, a digital (programmable) attenuator and a 60 degree/GHz phase shifter. This cascade is to be simulated at 2, 3 and 4 GHz respectively (varying Pin from -10 dBm to 10 dBm) and at each frequency the input TOI, output TOI, system gain and output power of the system are to be determined using ADS. I have included a schematic of the cascade as well as the characteristics of the LNA's. My biggest issue is when I try to run a simple Harmonic Balance (HB) simulation and attempt to plot something as simple as vout (dBm) vs frequency I end up with invalid vout readings.
I had tried to run a Budget type sim but I learned you cannot use the linear components in that sim as I do not know their S-parameters (do they have associated S-paramters?).
Any help at all in terms of creating a meaningful output for the mentioned parameters would be greatly appreciated.
Adam B