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BPF design using ADS 2009

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*Anusha*

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Hi all;
I'm a beginner.I have just started designing filters using ADS 2009. I designed a six element band pass filter. But the response is not smooth. Wat am i supposed to do ?? Thanks in advance :)
 

*Anusha* said:
Hi all;
I'm a beginner.I have just started designing filters using ADS 2009. I designed a six element band pass filter. But the response is not smooth. Wat am i supposed to do ?? Thanks in advance :)
Click to expand...
* It would much help if you could show us your circuitry. Otherwise, it seems to be problematic to give any comment.
* Your response is "not smooth"? Time or frequency response? What do you want resp. expect from your filter?
 

I have attached my circuit and the frequency response. Thanks for your reply :)

 
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    ttkane

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You can optimise the your design in ADS, and you can set the S21 range for optimising flatness.
Your filter seems have problem, its S21 < -30dB, that should have problem normally in design. The S21 normally is several dB.
 
*Anusha* said:
I have attached my circuit and the frequency response.
Click to expand...

Set a smaller frequency step, so that you can see what happens in the passband. At the moment, you only have 3 data points there.
 

Yes, you need much more data points for evaluating the frequency response.
In addition, what are your requirements - that means, which filter characteristic (ripple within the passband) do you want?
 
@All
Your reply was helpfull. Can you tell me how to create the layout using ADS 2009 ? Do we have Auto- layout ?
 

How do we create layouts if we use lumped components for the design ?
 

I used to simulate in ADS, and then verify in AWR, then export AWR layout in DXF format. The dxf can be imported into Altium for PCB.
 

i'm have a few suggestion
if you simulate the BPF ,
Simulation set sweep point up to 201 or 401....
maybe can solve your question .
 

@volker_muehlhaus : Where should i look for this example ? Is it possible to create layout with lumped components design ?
 

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