B39242B8689P810

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SAW filters stand for “surface-acoustic-wave” filters, and are among the most common components in communication systems. B39242B8689P810 is the model number of a particular surface-acoustic-wave filter, and this article will discuss its application fields and working principle.

SAW filters typically feature narrow bandwidth, sharp roll-off, low insertion loss, and low group delay ripple, thanks to their unique operational characteristics. As such, they are commonly used in the frequency selection area of baseband, intermediate frequency, high frequency, and multi-carrier systems. This makes them indispensible components in modern devices such as cellular phones, two-way radios, remote control devices, wavelength-division multiplexed transmission systems, and audio amplifiers.

B39242B8689P810 in particular is a SAW filter designed for use in the GSM1800 family of cellular networks. It is a two-stage device with wide flat passbands and extremely sharp transitions. It can reduce notching and prohibit the interference of other GSM systems while keeping the desired signals from being suppressed.

The working principle of the B39242B8689P810 is based on the acoustic wave generated by piezoelectric effect. In other words, when an AC voltage is applied to the electrodes of a suitable material, a wave is generated along the surface of the material. The magnitude and affinity of the wave depend on the resonator design. The B39242B8689P810 employs ceramic resonators to process the input signals, and the output is derived by differentiating and calibrating them electronically.

Moreover, the operating frequency of the B39242B8689P810 can be adjusted by varying the mechanical or electrical characteristics of the resonator. This facilitates a smooth transition from one filter to another, with minimal signal distortion. The B39242B8689P810 also features good temperature stability and vibration-proof structure.

In summary, the B39242B8689P810 is a SAW filter designed for use in cellular networks. It features wide flat passbands and extremely sharp cut-off edges, low insertion loss, and low group delay ripple. Its working principle is based on the acoustic wave generated by piezoelectric effect, and the operating frequency can be adjusted by varying the mechanical or electrical characteristics of the resonator. This makes it an indispensible component in the GSM1800 family of cellular networks.

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