SF2156B

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

SAW filters are miniature filters that use surface acoustic waves (SAWs) to achieve signal filtering and routing. The SF2156B is a classic example of such devices and its application field and working principle can be reviewed in this article.

At its most basic, a SAW filter is composed of a transducer and crystal lattice substrates. The transducer creates an acoustic wave when an electrical signal is applied. This wave then propagates through the lattice and interacts with any elements present. The frequency response of the wave is determined by the elements, and the output can be conditioned when elements are designed properly.

The application field of the SF2156B is wide-ranging. Its size and RF performance makes it suitable for rf filtering in a wide range of different appliances, including cell phones, automation systems, and consumer electronics. In addition, it can be used for frequency band selection, signal routing, multiplex selection, and PLL signal shaping. The SF2156B is also suitable for applications that require high linearity and tight matching performance.

The working principle of the SF2156B is based on the reflection and transmission characteristics of the acoustic wave when it passes through a lattice of elements. The elements, which are usually made up of reflective layers, can selectively redirect energy from an incoming wave in both directions. When electrical signals are applied to the transducer, an acoustic wave is generated and launched into the lattice. The wave then travels across the lattice, interacting with the elements as it goes. Depending on the frequency of the wave, some elements will selectively reflect more energy and some will reflect less.

This reflected energy is sent back in the direction of the transducer. When the reflected wave reaches the transducer, it will cause the output signal to be conditioned according to the frequency and amplitude. In summary, the SF2156B is a miniature filter that is suitable for a wide range of appliances, and its working principle is based on the reflection and transmission of acoustic waves across an element lattice.

The specific data is subject to PDF, and the above content is for reference