narda bias tee

Hi..
May i ask what is a bias tee circuit and how do i make use of it? How do i calculate the values?
By placing a bias tee circuit before the doubler what does it help in my doubler
Thanks alot.. please help

http://www.picosecond.com/objects/AN-01e.pdf

vfone's comment is right on. There is even a schematic on the face of the Picosec Labs part.

You may want to look at this too:

h**p://www.microwaves101.com/encyclopedia/quarterwave.cfm

Mini Circuits, Narda and TYCO are places to look for components. There are many more.