what will be the real output? RF model or low frequency mode
时间：04-09
整理：3721RD
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Hi guys
suppose the input signal is Vin, for a port of 50 ohms matches with a resistor 50 ohms, what will be the voltage on the resistor, Vin or Vin/2? I realized if you use Vsin component and port, they will give different voltage.
Another similiar question is if a port is open, what will be voltage , Vin or 2*Vin. It seems for RF we have to use wave format which is different from low frequency counterpart.
can anyoine explain on this? I really appreciate it.
Thanks,
B
suppose the input signal is Vin, for a port of 50 ohms matches with a resistor 50 ohms, what will be the voltage on the resistor, Vin or Vin/2? I realized if you use Vsin component and port, they will give different voltage.
Another similiar question is if a port is open, what will be voltage , Vin or 2*Vin. It seems for RF we have to use wave format which is different from low frequency counterpart.
can anyoine explain on this? I really appreciate it.
Thanks,
B
Yes, both!
It just depends on where the voltage is specified.
If specified at the Port, Vin is across the load.
If Your source is a "voltage source", then Vin is across the load
If your source is some ficticious mathematical entity, where there is a voltage source Vs, and a sepArate resistor meant to represent the "source impedance", then it develops Vs/2 across the load.
If it is a Microwave signal generatotr with an output power specified, that is the power coming out of the generator into a 50 ohm load.
Rich