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SAW Filters

Surface acoustic wave (SAW) filters are designed to operate in the frequency range from a few hundred kilohertz to several gigahertz and are used in electronic signal processing. They are used in numerous communication systems for signal filtering, signal modulation, multiplexing and demultiplexing, and signal generation. They are also used in radar systems to filter and amplify the signals. SAW filters can be used in virtually any area where filter performance is required, including consumer electronics, automotive, mobile communication, medical equipment, military, and aerospace.

B39781B7940P810S3 Application Field and Working Principle

B39781B7940P810S3 is an active single-pole four-way (SP4W) SAW filter developed by LEE SONIC. It is made of piezoelectric material and has an operating frequency range from 200 MHz to 4.80 GHz. The filter operates in an L-band and offers a low insertion loss of 3.5 dB at 200 MHz, a high attenuation of 43 dB at 4.8 GHz and a wide dynamic range of 512 MHz. This SAW filter has a small size and offers high performance in a compact package, making it ideal for use in a variety of communications applications.

The working principle of the B39781B7940P810S3 is based on the generation and reception of acoustic waves within the active elements, such as the IDT, delay line, and the resonator. The IDT acts as an emitter and receiver of the acoustic wave. When the electrical energy passes through the electrodes of the IDT, a mechanical wave is produced due to the transformation of the electrical energy into mechanical energy. The mechanical wave causes a vibration of the piezoelectric element, which in turn generates an acoustic wave that propagates through the surface of the piezoelectric material. The delay line and the resonator are used to modify the wave propagation in order to achieve a desired frequency response.

The filter is designed to be used in a variety of applications that require a reliable and low-cost solution for signal filtering. Applications include frequency shift keying (FSK) systems, satellite broadcasting systems, frequency hopping systems, and systems that require a wide dynamic range. The filter can also be used in systems that require high frequency accuracy, such as system timing and synchronization systems. The filter has low insertion loss, high attenuation and compact design, which makes it well suited for many communication systems.

The B39781B7940P810S3 is a robust, high performance and cost effective active single-pole four-way SAW filter, and is ideal for use in a variety of communication systems. The filter offers low insertion loss, high attenuation, and a wide dynamic range, making it well suited for signal filtering in systems that require high frequency accuracy and reliability.

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