Hi, everyone. I am wondering how to design the DC bias network for varactor in GHz range. I saw many literatures using the radial stub with a very narrow microstrip line as the bias pads. Anyone has some recommendation references of this type of DC bias network and any other topologies? Thanks.
Hi, rfmw.
The desired frequency is about 2GHz.
Can you give me some layout/circuit example for using the 0603 resistor?
I think the most difficult part is the RF choke for the DC bias, I tried the 0804 440nH inductor as the RF choke, but it seems the isolation between the DC feed to the RF port is still too low.