Guidelines for Choosing RF and Microwave Products: Ceramic Filters
■ Ceramic filters are less expensive to produce than either LC or cavity-type filters and are smaller than all but Surface Acoustic Wave (SAW) or Bulk Acoustic Wave (BAW) filters (Figure 1).
■ They can be realized in bandpass configurations as well as duplexers, although not broadband lowpass or highpass filters because their ceramic resonators are inherently narrowband.
■ Their maximum input power is about 5 W and useful frequency range is 400 MHz to 6 GHz, the higher frequency being achieved by using ceramic material of various dielectric constants to optimize the size of the resonators.
■ Most ceramic filters have Chebyshevresponses (Figure 2), although it is possible to produce an elliptic response as well when extremely high sharp transitions between passband and rejection points are required.
■ As ceramic filters are surface-mountable, they are well-suited for automated assembly techniques and are available on tape-and-reel.
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User's Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2015/10/22 |
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601 KB |
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