B39911B3943H110

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Surface Acoustic Wave (SAW) filters are commonly used in wireless communication systems to selectively propagate acceptable signals while blocking interference signals. The B39911B3943H110 is a SAW filter family from Murata that is widely used in wireless communication systems. This article examines the application field and working principle of this product.

The B39911B3943H110 is a narrow band SAW filter band pass filter specifically designed for wireless communication applications. This product is designed to pass the frequency range of 400 to 430MHz while maintaining low insertion loss and high out band rejection, making it an ideal choice for GSM applications. This SAW filter also has an ground signal conditioning circuit that helps to remove the temperature dependence of the filter, ensuring that the signal is of the highest quality. In addition, the small size of the device helps to reduce system board footprint and cost.

The working principle of the B39911B3943H110 is based on the use of two piezoelectric transducers (a transmitting and a receiving transducer). A signal is applied to the transmitting transducer, which will cause it to vibrate at the frequency of the signal. The vibrating transducer will emit surface acoustic waves (SAWs) that will propagate through the substrate and interact with the receiving transducer. The receiving transducer will then convert the SAWs into an electrical signal.

To achieve the desired frequency selectivity, the SAW filter is designed with a lattice of discrete elements that act as a filter for the acoustic energy. Each element of the lattice is designed with a specific cutoff frequency. By tuning these elements to the desired frequency, they will be able to selectively allow (or block) frequencies of different ranges from passing through. In the case of the B39911B3943H110, the filter is designed to pass frequencies between 400 to 430MHz.

In summary, the B39911B3943H110 from Murata is a narrow band SAW filter specifically designed for wireless communication applications. This product is designed for use in GSM applications and features low insertion loss and high out band rejection. The working principle of the filter relies on the use of two piezoelectric transducers and a lattice of discrete elements that act as a filter for the acoustic energy. By adjusting the elements to the desired frequencies, this filter is able to selectively allow (or block) frequencies of different ranges from passing through.

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