B39202B8519P812

The B39202B8519P812 is an acoustic-wave (SAW) filter. Such devices convert radio frequency (RF) input signals to an output signal with a specific frequency. They are commonly used for signal-processing applications such as frequency selection, demodulation, and selective signal rejection. SAW filters are available in many different forms, from small surface-mount devices to large multi-stage integrated circuits.

The B39202B8519P812 is a filter designed for use in mobile communication systems. It is a three-stage SAW filter with an insertion loss of less than 0.5 dB and a steep skirt of 6 dB per octave over a 3 kHz bandwidth. It has a passband of 455–940 MHz and a center frequency of 698 MHz. It is a fairly compact filter, measuring only 12 mm x 12 mm x 4 mm.

The primary application for the B39202B8519P812 filter is in cellular transmitters and receivers. It is used to filter out unwanted signals and to extract the signal of interest from the incoming RF signal. The filter can also be used in other applications where accurate frequency selection is required, such as satellite communications, security systems, and medical imaging.

The working principle of a SAW filter is based on the piezoelectric effect. A piezoelectric material, such as quartz, is excited by an electrical signal to generate a mechanical vibration. This vibration will cause the frequency of the incoming signal to match that of the resonance frequency of the oscillator. The filter is then able to reject unwanted signals and extract the desired signal.

The B39202B8519P812 is a type of SAW filter with a high degree of frequency-selective performance. It can be used in a wide range of applications to accurately select a signal of interest from an incoming RF signal. While the device is small and compact, it provides excellent performance with an insertion loss of less than 0.5 dB and a steep skirt of 6 dB per octave.