Filter Design for broad band

[rajesh navagare]

Here, classical filter design method i know but i am not sure about filter design for following situation.

picture is given below for detail where 50 ohm is matched to capacitor and resistance load of 20 ohm, for band of 6 GHZ with center frequency of 5.5 GHz.

 

[BradtheRad]

You can create a bandpass filter by putting in a series inductor. Or as an alternate there is a 2-capacitor bandpass. Perhaps it's not giving away too much if I post these...



These are merely two easy methods. By playing with values you might obtain the specified rolloff curve. Even then there could be a better method.

 

[FvM]

Wideband matching of a reactive load isn't generally possible. I don't see a way to achieve it in the present case.

 

[DavidZlavan]

Hello @rajesh navagare ,

For a properly filter design I think you would need 50 ohms in both ports.

Maybe a matching network is what you need.

I often use this calculator to simplify work:

**broken link removed**

You will need to know that 0.7pF are Z_c=1/jwC where w=2pif

BR