SF1186H-2

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SAW filters, or surface acoustic wave filters, have emerged as the highest performing, and often most cost-effective filters available in many applications. The SF1186H-2 is a bandpass SAW filter designed for use in cellular applications ranging from digital voice, digital TV, and data links. This particular filter configuration was developed to meet the stringent requirements of the 3GPP band 2 and 3 standards.

The SF1186H-2 consists of a transmit and receive path, including an input stage, a control stage, and a resonator stage. The input stage is the most critical part of the filter, as it determines the filter’s frequency response. It is comprised of two parallel semi-lumped circuits that are optimized to provide both the desired frequency response and the low-noise characteristics required for cellular applications.

The control stage, which is the second part of the filter, is used to control the amount of signal that is passed through the filter. It consists of a series of components that are used to adjust the filter’s response by controlling the gain and the signal levels in the passbands. This stage is highly optimized to ensure the desired performance is achieved and unwanted signals are effectively removed.

The resonator stage, which is the third part of the filter, is used to determine the frequency response of the filter. This stage consists of acoustic delay lines which are used to control the filter’s passband shape and gain over the frequency range. These acoustic elements are highly tuned for optimal performance and are designed to reduce harmonic distortion.

The SF1186H-2 is ideal for use in applications that require a wide range of signal frequencies. The filter can easily be tweaked for band-specific applications by adjusting the components in the control and resonator stages. The filter’s performance is further enhanced by the use of an external matching network to optimize the signal levels in the passband.

Overall, the SF1186H-2 is a versatile and reliable SAW filter for use in a variety of cellular applications. Its combination of high-performance components, low-noise characteristics, and inherent flexibility make it an ideal choice for those applications requiring a wide range of frequencies and a robust signal path. The SF1186H-2 has been tested and certified to meet or exceed the 3GPP specifications, making it a proven performer for today’s cellular needs.

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