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Question-dielectric filter, SAW filter, ceramic difference

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Alvin_Hu

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hey guys, thank you for viewing this question
Could anyone teach me what are the advantages and disadvantages under 5GHz between them? (operating frequency? high Q?....) Thanks.
 

Re: Question-dielectric filter, SAW filter, ceramic differen

Dielectric filter, to big
saw filter high loss good selectivity
ceramic, low loss
 

Re: Question-dielectric filter, SAW filter, ceramic differen

Hi, Alvin

At first ceramic is also a kind of dielectric.

Below 5GHz the main purpose of designing filter for band-selectivity in mobile devices is to improve the selectivity and reduce its size. Single-block filters based on high permittivity ceramic suitable for SMT(surface mounting technoloby) was uese long time ago. After a while, SAW filter with accoustic-microwave energy transformer has a small insertion loss and very compact size because of the microelectronic process, which makes SAW filter for mobile devices.

But at high microwave frequencies, high Q ceramic resonator and filter are used for high quality application.
 

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