SF1146B

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Frequency - Center:	499.25MHz
Bandwidth:	30kHz
Insertion Loss:	3.5dB
Ratings:	--
Applications:	Digital Cable Filter
Mounting Type:	Surface Mount
Package / Case:	10-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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SAW Filters

Surface Acoustic Wave (SAW) Filters are widely used in wireless communication systems due to their various advantages, such as low insertion loss, sharp selectivity, low susceptibility to aging, high temperature stability, and cost effectiveness. The most significant characteristic of SAW filters is its use of surface acoustic waves (SAWs), which is a form of mechanical wave propagating on the surface of a piezoelectric medium, such as quartz or ceramic. When an Radio Frequency (RF) signal is introduced to the filter, the signal interacts with the SAWs generated on the surface of the piezoelectric which causes the signal to be attenuated. This type of filters can be used for a wide range of applications, including medical imaging, antenna testing, and instrumentation.One of the most commonly used SAW filters is the SF1146B, which is a 4th order low-pass filter with a cut-off frequency of 15 MHz. It is designed to reject signals from 0 to 14.999 MHz and pass signals from 15 MHz onwards. The SF1146B can be used in a variety of applications, such as radio transmitters, receivers, and antennas, as well as for test and measurement equipment.The working principle of the SF1146B is based on the resonance of the SAWs. When an RF signal is introduced to the filter, the SAWs cause the signal to be attenuated. This is due to the fact that the SAWs act as an acoustic wave barrier, which creates a continuous attenuation of the signal. In addition, the SAWs resonate at specific frequencies, resulting in high-pass filtering, which allows signals that are higher than the cut-off frequency to pass through. The resonance also causes the signals lower than the cut-off frequency to be rejected, creating a low-pass filter.The SF1146B has a wide dynamic range, making it ideal for many applications. The dynamic range also allows for high levels of attenuation, resulting in a low insertion loss, meaning that the power lost when the signal is input to the filter is minimal. The high dynamic range also allows for precise control of the filter rejection characteristic, making it a good candidate for many applications.The SF1146B filter is cost effective when compared to other types of filters, and is simple to use with minimal wiring. The low cost and easy installation make the SF1146B an attractive option for users who require a compact and efficient filter for their application.Overall, the SF1146B is an effective SAW filter that provides low insertion loss, sharp selectivity, and high temperature stability. Its low cost and ease of installation make it an ideal choice for a variety of applications. From medical imaging to antenna testing, the SF1146B is a versatile filter that can be tailored for any application.

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