design of 3Ghz bandpass filter using ADS

[nehal02]

Hi everyone,

I'm designing a 3GHz bandpass filter using a 4th order Chebyshev approach. After calculating Zoe and Zoo, and using LineCalc in ADS for width and length, my simulated results aren't matching the expected filter response. Any advice on what might be going wrong? I have attached schematic,simulation output and required output.

 

[G4BCH]

I'm not familiar with ADS,, but in other similar software I have used if I remember correctly the mil dimension is 1/1000 inch. Check that you have the dimensions set to metric some software defaults to imperial units..

 

[volker@muehlhaus]

Check the value of s3, there seems to be a typo in your VAR block.

 

[rf_engineer_5]

I believe you can design filters in ADS. There are a couple tutorials on using the tool on youtube. You may get a better starting point that using linecalc.

 

[nehal02]

I'm not familiar with ADS,, but in other similar software I have used if I remember correctly the mil dimension is 1/1000 inch. Check that you have the dimensions set to metric some software defaults to imperial units..

your input was really helpful, i was making error in dimension.