CBPFS-0881

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Surface acoustic wave (SAW) filters are a type of filters widely used today in radio frequency communications. They are characterized by their high frequency stability, low noise level, and narrow band pass characteristics. This makes them extremely useful for applications which require highly accurate filtering operations at radio frequencies.One example of a SAW filter is the CBPFS-0881 model, which is constructed using a single quartz ceramic substrate and one metallization-on-quartz layer. The filter is designed to operate in the 800-900MHz frequency band, and has a bandwidth of 0.1MHz. Its performance specifications include insertion loss of less than 1.5dB, and a group delay variation of 0.5ns.The working principle of the CBPFS-0881 is based on a surface acoustic wave propagation technique. The quartz ceramic substrate of the filter acts as a substrate, allowing the incoming radio frequency signal to propagate atop it. At the interface between the substrate and the metallized layer, surface acoustic waves are generated which interact with the incoming signal.The filter structure is built up of a variety of components such as interdigital transducers, reflectors, and absorbers. The interdigital transducers act as the input and output ports for the filter, while the reflectors and absorbers are used to shape the filter responses. The interdigital transducers also create surface acoustic waves which propagate on the metallized layer, and interact with the incoming signal to create the desired filtering action.The various components of the CBPFS-0881 interact with each other to create a complex filter structure. The filter is designed to allow signals in the 800-900MHz band to pass through, while suppressing signals outside this band. This can be used for a variety of applications, such as filtering out unwanted interference in mobile phone networks, or for improving signal to noise ratio in radio communication systems.In summary, the CBPFS-0881 is an example of a SAW filter used for high frequency filtering operations. Its working principle is based on a surface acoustic wave propagation technique, which enables it to pass signals in the desired frequency band while rejecting signals outside the band. This makes it an effective solution for many challenging applications.

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