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SAW Filters

SAW filters (surface acoustic wave filters) are a type of electronic filter that are based on the acoustic wave propagation on the surface of piezoelectric substrate. The main function of a SAW filter is to selectively pass or block certain signals based on their frequency. The B39202B7720C610 is one of many SAW filters on the market today.

Application Field of B39202B7720C610

The B39202B7720C610 is a type of SAW filter which is specifically designed for high performance filtering in the mobile communication and wireless applications. It can be used in multiple frequency bands including Global System for Mobile communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA) and Long Term Evolution (LTE) bands. The high performance characteristics of the filter and its wide range of operation allow it to be used in a variety of applications such as cellular base station transceivers,cellular repeaters, mobile phones and Wi-Fi equipment.

Working Principle of B39202B7720C610

The B39202B7720C610 operates based on the principle of surface acoustic wave (SAW) propagation on two piezoelectric substrates or layers. The filter consists of a substrate, two transducers and two reflectors separated by an interdigital network. The two transducers are placed on opposite sides of the substrate and generate two surface acoustic waves (SAWs) at the respective frequency bands that the filter is designed to pass. The SAWs propagate between the two reflectors and pass through an interdigital network which produces the desired filter characteristics. The two SAWs interact with each other in the interdigital network, producing destructive interference that results in the rejection of unwanted frequencies. The SAWs also enjoy limited attenuation in the interdigital network, allowing for the desired frequencies to pass while blocking out all the other frequencies.

In addition to filtering signals, the B39202B7720C610 can also be used for level shifting or attenuation of the input signal. This is done by adjusting the amount of electrical signal that is applied to the transducers, thus changing the amplitude of the SAWs and changing the throughput of the filter. The level shifting ability of the B39202B7720C610 is particularly useful in applications that require more dynamic range.

Conclusion

The B39202B7720C610 is a type of SAW filter which can be used in wireless communication applications. It operates based on the principle of two SAWs propagating between two reflectors on opposite sides of a substrate, which interact in an interdigital network so as to produce the desired filter characteristics. The filter can also be used for level shifting or attenuation of the input signal. It is highly suitable for applications that require high performance filtering in multiple frequency bands, such as cellular base station transceivers, cellular repeaters, mobile phones and Wi-Fi equipment.

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