SF2164E

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Surface acoustic wave (SAW) filters are used in telecom applications to provide signal-processing services and filter out frequency components. While passive SAW filters, such as the SF2164E, can be broadly divided into several categories, they all operate by utilizing the propagation of surface acoustic wave along piezoelectric substrates.

The SF2164E utilizes quartz substrates for its filter design, meaning it offers an extremely narrow passband and excellent temperature stability. Typically, the SF2164E is used in a variety of communications and consumer electronics applications, where a high-order order bandpass filter is required. This could include filtering of signals for mobile phones, data equipment, or base stations.

The SF2164E operates by converting the incoming signal into an equivalent surface acoustic wave. A traveling wave is generated and travels along the length of the Quartz plate, with the waveform reflected at the input and output side, forming a loop. The wave frequency is determined by the physical properties of the Quartz substrate as well as the frequency response of the transducer used at each end of the filter. Electrical input signals are converted into surface waves and then re-converted back to electrical signals, allowing selective attenuation and/or gain of selected components of the signal. The high order response of the device allows very narrowband signals such as desired channel frequencies in a wireless communication system to pass through the filter unimpeded.

The SF2164E is designed to be integrated into existing systems, with the package easily mating with existing Printed Circuit Boards (PCBs). High attenuation, sharp transition from stop-band to pass-band and significantly wide stop-band are a few reasons why the SF2164E is particularly suited for telecom applications. Its very small size also contributes to its wide use, allowing the filter to be used in space-constrained system layouts. Additionally, the SF2164E uses a robust and durable design, allowing it to perform reliably in extreme temperatures and in contaminated environments.

In conclusion, the SF2164E is a highly effective SAW filter designed for telecom applications requiring a narrow passband and excellent temperature stability. Its physical design, wide stop-band, and small size make it an attractive option for communication system designers who need a reliable filter with a high degree of physical and electrical performance.

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