How can i pulse a DC current at a rate of Ghz

[Irenical]

how can i "pulse" a DC current at a rate of Ghz

i need to pulse a dc current through a circuit in at 2.45Ghz. astable multivibrator style
How might i go about doing this

 

[skeptic2]

Why?
What are the maximum rise and fall times you can accept?
What on-time to off-time ratio do you need?

 

[berkeman]

i need to pulse a dc current through a circuit in at 2.45Ghz. astable multivibrator style
How might i go about doing this

We discuss some of the issues here recently:

https://www.physicsforums.com/showthread.php?t=443596

.