Is matching necessary when you try to test?

[liletian]

Hi guys
I want to ask if some of you have experience on test performance without matching. My question is if you put your power port(-50 dBm @50 Ohm) which is 1mv if you matched into 50 Ohms, you connect the power port into a gate of mosfet,of course it is not matched. My qeustion is what is the voltage here? what is the real voltage 1mv or 2mv?
Thanks,

 

[vfone]

Depending what exactly high resistance has the input of your MOSFET, the voltage actually could be up to 100mV.

 

[FvM]

the voltage actually could be up to 100mV

This could be the case only with a zero or infinite impedance source. I understand that power port means a matched 50 ohm source. Then, the output voltage can't be higher than 2 mV.