Is a SAW filter is an active filter?

[zahrein]

Guyz, i is SAW filter is an active filter or a passive filter ?

 

[naughtyboy]

passive, may costs 2dBm power loss.

 

[dushan1]

a passive filter it's loss is dependent on the bandwidth.more wider more smaller.

 

[satellite]

With respect to other passive filters, SAWs has a better group delay response.

 

[springf2000]

SAW is passive filter,the IF SAW has high outband attenuation ,it is more easy to fabricate but the RF saw is difficult to design

 

[vagarwal]

Surface Acoustic Wave: A sound wave that propagates along the surface of a solid and is contained within the solid. SAW devices typically combine compressional and shear components. In Wireless applications, SAW refers to a Surface Acoustic Wave band-pass filter, which exhibits much better out-of-band rejection, but has higher passband ripple and insertion loss.

I am attaching some good articles on the topic...

Enjoy reading

 

[chihhao]

passive , but FEM will integrate active component in it

 

[radiohead]

Please don't reply for the 10th time it's a passive filter. Add something constructive instead.

You should check the groupdelay. It always has some ripple over the passband. Take this into account.

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