B39171B3942U310

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Surface Acoustic Wave (SAW) filters are commonly used in the telecommunication industry to isolate frequencies from each other within a complex signal, such as those used in cellular phone standards. The B3917-B3942U310 is one particular type of SAW filter used for this purpose. This article will discuss the application field and working principle of the B3917-B3942U310 SAW filter.

Application Field

The B3917-B3942U310 SAW filter is a bandpass filter designed to operate in a frequency range of 800 to 2400 MHz. It is designed to isolate signal components within this range while suppressing signals outside of the band. This makes it ideal for use in cellular phone standards such as GSM and CDMA. In addition, it can be used in other communication systems such as WLAN and bluetooth.

The B3917-B3942U310 SAW filter also has a small size and low insertion loss, making it suitable for use in handheld devices. This makes it an attractive option for manufacturers of cellular phones, tablets, and other small communication devices. It is also more rugged and more tolerant of temperature and humidity changes than other types of filters.

Working Principle

The B3917-B3942U310 SAW filter works by applying a time-varying alternating voltage to an interdigital transducer (IDT). This voltage creates mechanical vibrations (surface acoustic waves) that propagate a short distance along the surface of the filter. These vibrations interact with the IDTs in the SAW filter, creating specialized standing wave patterns that isolate certain frequencies and reduce the amplitude of unwanted frequencies.

The working principle of the B3917-B3942U310 SAW filter is similar to that of a bandpass filter. It isolates signal components within a certain frequency range while reducing the amplitude of signals outside of the range. In addition, the B3917-B3942U310 SAW filter also has the advantage of being rugged and temperature-tolerant, making it suitable for use in handheld devices.

Conclusion

The B3917-B3942U310 SAW filter is a bandpass filter designed for use in communication systems such as cellular phones and other handheld devices. It operates by applying a time-varying alternating voltage to an interdigital transducer, creating mechanical vibrations that interact with the IDTs in the SAW filter, creating specialized standing wave patterns that isolate certain frequencies while reducing the amplitude of unwanted frequencies. This makes it an attractive option for manufacturers of cellular phones, tablets, and other small communication devices.

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