RF filter design tips???

[1icarus1]

Hi,

I would like to design an RF notch filter for allowing or not a TV channel's signal in a TV tuner. I have found some smd (1206 package) inductors (nH) from TAYO YUDEN company and I would like to use them.

I dont't have any experience in the RF design. So, is there anything I have to know or carefull about. I mean any tips???

Thank you all.

 

[BigBoss]

Use an external filter with helical notch externally because if you implement this filter with conventional SMD components ( at especially higher frequencies) the bandwidth of the filter will be relatively large due to low Q factor of the components that you intend to to use.So that, this large band will also attenuate adjacent channels which are maybe desired to receive.

A channel notch filter should have very sharp bandwidth edges and high quality factored components.

This is not very easy to implement with SMD components..

 

[7rots51]

Where we can find design information and formula of Helical filters(BPF,Notch)?do you have this formula? can u upload them?I need it too much.

 

[VSWR]

Message is unavailable.

 

[7rots51]

I saw that page, Is there any new links or better pdf about helical and cavity filters?