B39901B4330P810

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SAW Filters

Surface Acoustic Wave (SAW) filters, also referred to as surface wave filters, are high-performance components designed to operate as frequency selective media over a range of frequencies. SAW filters are used in radio frequency (RF) communications, communication system and radar systems, and their key features include low insertion loss, wide frequency range, high selectivity, low temperature stability, and high power handling capability. Furthermore, these features make them ideal for use in systems that require frequency tuning, such as cell phones and navigation systems.

B39901B4330P810 Application Field

The B39901B4330P810 is a type of SAW filter specifically designed for use in mobile networks, digital cordless applications, Bluetooth applications, and digital broadcasting systems. This particular filter has an absolute maximum ratings of 5.8 dB insertion loss, 0.6 dB selectivity and 17.2 dBuV maximal transmission. In addition, its frequency range covers the frequency band of 403.0-420.0 MHz with a reverse isolation of 14.1 dB and a temperature range of -30°C to +90°C.

Working Principle of B39901B4330P810

The B39901B4330P810 is an electrostatically-controlled SAW filter which is made up of a quartz crystal substrate material. This material is etched into an array of tiny electrodes which then form the filter, and each electrode acts like a waveguide for an acoustic wave born in the substrate material.

The design of the filter then dictates the frequency and amplitude responses needed, and an array of these electrodes is used to construct the filter. The modulating voltages are used to tune the filter\'s response by controlling the filter’s elements such as length, width, and gap settings.

The practical applications of this filter depend on the transducer design, which converts the acoustic wave into electrical signals or vice versa. For example, a SAW filter can perform multiplexing, filtering, and frequency conversion within a single component for high-performance analog or digital radio signal processing applications.

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