B39751B8321P810

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SAW (Surface Acoustic Wave) Filters are widely used in wireless communication and other related application fields. This type of filter is advantageous compared to other filters due to its small size, higher frequency cutoffs, narrow stopband frequency selectivity and superior insulation of the acoustic output. B39751B8321P810 is one of the many varieties of SAW Filters available in the market.

The B39751B8321P810 SAW Filter is designed for use in GSM (Global System for Mobile communication) systems. It is a 4th order band pass filter and has a passband frequency selectivity of 3.4KHz and a passband gain of 5dB. The filter is tuned for the carrier frequency of 935.4 MHz and has a bandwidth of 8.2-8.6 MHz. The stopband frequency selectivity is -60 dBc, which means that it exhibits excellent rejection of out-of-band signals.

The working principle of B39751B8321P810 is based on the generation of a surface acoustic wave in a piezoelectric crystal or crystal cut-off plate. The crystal is made of zinc oxide (ZnO) and coated with aluminum electrodes on the top and bottom surfaces. A signal is applied to the electrodes and, due to the piezoelectric effect, it causes a wave propagating along the surface of the crystal. This wave is then split into two waves by the notches which are etched on the surface of the crystal. The two waves interact and cancel out to produce a low-pass Bessel filter, also known as an SAW filter.

The B39751B8321P810 SAW Filter is designed with a frequency response specifically tailored to the GSM carrier frequency of 935.4 MHz. This ensures maximum suppression of the out-of-band signals and consequently enhances the performance of the GSM system. The filter has a flat response in the passband and a steep attenuation at the edge of the stopband frequencies and is thus ideal for the signal processing of GSM systems.

Because of its very small size, the B39751B8321P810 SAW filter can be easily integrated with the other system components. The insulating properties of the acoustic output also ensure that no interference is caused by other electronic components. This makes it suitable for use in systems where space and power requirements are of paramount importance.

Overall, the B39751B8321P810 SAW filter is an excellent choice for GSM applications due to its ability to provide an excellent frequency response with minimum reflection and low insertion loss. Its small size and superior insulation make it a viable choice for many portable and wireless communication systems. This makes it a popular choice for many applications in the wireless communication industry.

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