# Homework Help: Designing a matching circuit for maximum power transfer

1. Feb 3, 2012

### OnceMore

Hello.

I need to design a matching circuit to provide maximum power transfer from a generator with impedance Zg to a load with impedance ZL. The matching circuit has a length of transmission line with impedance Z0 and short circuit or open circuit stub with impedance Zs. I need to design with a short circuit stub and then an open circuit stub.

I am just not sure how to match Zg to ZL. I now if I was matching to just a line with impedance Z0, I would find the normalised impedance. Plot that point on the Smith chart, drawing a circile of that radius. Then, where that circuit crosses the 1 + jx circle, I can find the lengths of stubs needed, and the distances.

But I am just not sure if it is the same process for matching Zg to ZL. And I am not sure about the maximum power transfer.

I hope someone can point me in the right direction.

Thanks
-S

2. Feb 4, 2012

### rude man

Can the stub be located anywhere between the source and the load, or is it to be at the source or load end?

3. Feb 4, 2012

### OnceMore

I'm pretty sure it can be located anywhere between the source and load.

-S