RE: [Electronics_101] Sig Gen,,voltage multiplier
- Interesting about the two types of pads. I don't think they will help in this case.
Assuming your signal generator has a 50 Ohm output, and you've terminated the output with a 50 Ohm load for your voltage measurement, the 2.2 V represents 2.2 ^ 2 / 50 = 0.968 W. To get to 20 V, you would have to change the impedance to 20 ^ 2 / 0.968 = 4132 Ohms, which is pretty high. You might be able to do this by using a quarter wave matching section, about which there are several articles online, but I don't know if there is one that applies to microwave work.
If you want 20 V into 50 Ohms, you need an 8 W, 8 GHz amplifier with a power gain of about 83.
> Howard wrote:[Non-text portions of this message have been removed]
> A Pad appears to be a passive device for matching impedances at GHZ
> frequencies. Scroll down to near the bottom of the following page for an
> Are you trying to match the 50 ohm output of a 8 GHZ signal generator to
> a high impedance load?
> Joe wrote:
> > I have a 8.4GHz max output,,,generator,the voltage out is 2.2 Volts.
> > Root Means Square,,,SO,,I would like the voltage out (at 8ghz) to be
> > around 20 volts,and still retain its 8ghz integrity.I have been told I
> > need a pad,,I have absolutely No Idea what this is or means.
> > Is there a simple way to do this?
> > Love this Group.
> > Joe in Texas