B39741B4339P810

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Surface acoustic wave (SAW) filters are an integral part of modern communication systems, as they are important for providing signal separation, frequency filtering and noise suppression. B39741B4339P810 is a compact, high-performance SAW filter for use in the industry. This article provides an overview of this filter’s application field and working principle.

SAW filters are commonly used in mobile communications, such as for frequency transformation, signal selection, and interconnection or distribution of remote radio units. They are also extensively used in wireless communications, including cellular networks, Bluetooth systems and satellite navigation, as well as broadband systems including digital audio broadcasting (DAB).

Built around semiconductor-based technology, SAW filters are the most suitable for applications requiring smaller sizes, greater durability, and high level of performance. B39741B4339P810 is a SAW filter designed to meet these requirements.

It features a wide frequency range of 925MHz to 960MHz, superior insertion loss, and a low group delay variation (GDV). The device is enclosed in a small 3.5x3.5mm package, and is suitable for various RF applications.

The device utilizes a piezoelectric crystal as a resonator. Piezoelectric material such as quartz crystal produces a mechanical vibration in response to an applied electric field. When an electrical signal is applied to the piezoelectric crystal, a vibratory field is created in the form of surface acoustic waves (SAW) that travel across the surface of the crystal. The SAW filter then takes advantage of this vibratory field to process the input signal and output the desired frequency response.

B39741B4339P810 SAW filter uses an integrated SiOxZrO2 filter chip that is formed by layering a Si-based and a Zr-based ceramic. The Si-based ceramic functions as an acoustical reflector, while the Zr-based ceramic acts as an acoustical transducer, generating the piezoelectric effect. The filter chip is tuned by adjusting the thickness of its layers. The resonators are then connected to the input and output terminals, allowing the filter to be tailored for specific frequency applications.

The device operates in a band-pass configuration, meaning that the filter blocks signals outside of its tuning range while attenuating signals within the band. Signal attenuation is achieved by creating an intensity mismatch between the input and output ports. The device provides a nominal center frequency of 943MHz, while exhibiting superior insertion loss of 2.7 dB and an excellent group delay variation (GDV) of 0.20%.

To conclude, B39741B4339P810 is a high-performance SAW filter used for mobile and wireless communication applications and delivered in a small on-chip package. It features excellent insertion loss and a low group delay variation while providing a wide operating frequency range.

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