Allicdata Part #: | SF2148B-ND |
Manufacturer Part#: |
SF2148B |
Price: | $ 0.00 |
Product Category: | Filters |
Manufacturer: | Murata Electronics North America |
Short Description: | FILTER SAW 138.24MHZ 12SMD |
More Detail: | N/A |
DataSheet: | SF2148B Datasheet/PDF |
Quantity: | 1000 |
1 +: | 0.00000 |
Series: | -- |
Packaging: | Tape & Reel (TR) |
Part Status: | Obsolete |
Frequency - Center: | 138.24MHz |
Bandwidth: | 20MHz |
Insertion Loss: | 10.5dB |
Ratings: | -- |
Applications: | Cellular, SCDMA |
Mounting Type: | Surface Mount |
Package / Case: | 12-SMD, No Lead |
Height (Max): | 0.079" (2.00mm) |
Size / Dimension: | 0.276" L x 0.197" W (7.00mm x 5.00mm) |
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Surface Acoustic Wave (SAW) filters are commonly used in telecommunications and radio frequency applications. The SF2148B is a SAW filter designed for use in cellular and wireless communications applications by Skyworks Solutions, Inc. This filter has a wide range of applications, including cellular phones, satellite phones, and wireless Hotspots.
The SF2148B uses a combination of surface acoustic waves and resonators to achieve its filtering effects. A unique design of the filter, along with the application of a variety of methods for controlling the frequency and width of the passband, enable it to offer superior selectivity and rejection of interfering signals. The resonators in the filter are responsible for both in-band and out-of-band attenuation, giving the filter the ability to reject both narrow-band and wideband interference signals, as well as offering superior out-of-band rejection.
The overall frequency range of the SF2148B is between 800 MHz and 2.4 GHz, which corresponds to frequencies of 2G and 3G cellular systems, as well as most of the U.S. wireless spectrum. It also has a very low insertion loss of 0.45 dB at its specified center frequency of 1.9 GHz. The coaxial connector option of the filter makes it ideal for use in a variety of RF applications such as mobile handsets, HotSpot systems, MIMO systems, base stations, and other applications.
Another great feature of the SF2148B is its temperature stability. This is achieved through its combination of feedthrough delay lines and reflectors, as well as its use of plastic packaging. The package also provides a degree of RF shield integrity for fewer leaks and a greater degree of reliability in noisy RF environments.
In terms of its working principle, the SF2148B relies on the use of two surface acoustic wave transducers, one for each branch of the filter. The input power is split equally between the transducers at the beginning of the filter, and these two signals are then separated by the filter\'s unique structure. The frequency responses of the two channels of the filter are engineered to be almost identical, and this allows the filter to reject interference harmonics and other spurious signals. The two signals are then recombined at the output of the filter, resulting in an optimum filtered signal that has a high degree of selectivity.
In summary, the SF2148B is a SAW filter designed for use in a variety of RF applications, from cellular phones to Hotspots. Its unique structure and advanced techniques for controlling the frequency and width of the passband enable it to offer superior selectivity and rejection of interfering signals. Its wide frequency range and low insertion loss make it an ideal choice for applications ranging from handhelds to base stations, and its temperature stability ensures reliable operation in a variety of RF environments.
The specific data is subject to PDF, and the above content is for reference
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