SF14-1575F5UU15 Filters

Series:	SF, Kyocera
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Frequency - Center:	1.575GHz
Bandwidth:	3MHz
Insertion Loss:	1.2dB
Ratings:	--
Applications:	GPS
Mounting Type:	Surface Mount
Package / Case:	5-SMD, No Lead
Height (Max):	0.028" (0.70mm)
Size / Dimension:	0.055" L x 0.043" W (1.40mm x 1.10mm)

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SAW Filters and the SF14-1575F5UU15 Application

Surface acoustic wave (SAW) filters have become an integral part of the modern world, allowing for the transmission and reception of electronic signals with greater accuracy and efficiency than ever before. Specifically, SAW filters are used in a variety of applications, from military and aerospace to consumer electronics, to ensure the transmission and reception of high-quality radio frequency signals. The SF14-1575F5UU15 is a SAW filter which has been developed for use in mobile applications. This article will discuss the application field of the SF14-1575F5UU15 and explain its working principle.

Application Field

The SF14-1575F5UU15 SAW filter is a 4-pole duplexer filter which has been designed for use in mobile handsets. It has a pass-band of 20 to 60MHz, making it suitable for use in worldwide telecommunication systems. The filter also has a steep roll-off character, allowing users to achieve an adjacent-channel isolation of 42dB with a 7dB insertion loss. It can also be used in other applications, such as repeaters, or radios which require a high level of isolation.

Working Principle

The working principle of the SF14-1575F5UU15 filter is based on the principles of surface acoustic waves. Essentially, it works by sending a continuous acoustic wave, created through an interdigital transducer, through the filter’s substrate. This acoustic wave encounters various obstacles, such as metal or dielectric layers, which cause it to be refracted, reflected, and diffracted. The reflections and refractions act as a filter, allowing the desired frequencies to pass through, while all other frequencies are blocked. The SF14-1575F5UU15 filter is specifically designed to reflect signals at both the transmit and receive ends. When a signal is sent through the filter, it is first reflected off of the first layer of the material. This reflection reverses the phase of the signal and makes its direction to the antenna. The signal then encounters the second layer of material, which reflects the signal in the opposite direction, causing it to pass through the filter and reach the antenna. At the receiving end, the signal is further filtered by a different set of layers. This time, the layers act to reject signals with frequencies outside of the filter’s pass-band. In this way, signals with frequencies outside of the filter’s pass-band are blocked, allowing only those in the desired frequency range to pass through and reach the antenna.

Conclusion

The SF14-1575F5UU15 is a SAW filter which has been developed for use in mobile handsets. It has a pass-band of 20 to 60MHz, making it suitable for use in worldwide telecommunication systems. The filter can also be used in other applications, such as repeaters, or radios which require a high level of isolation. Its working principle is based on the principles of surface acoustic waves, which allow desired frequencies to pass through while blocking all others. In this way, the SF14-1575F5UU15 filter can be used to ensure the transmission and reception of high-quality radio frequency signals.

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