B39191B5087H810

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Frequency - Center:	192MHz
Bandwidth:	60MHz
Insertion Loss:	15.2dB
Ratings:	--
Applications:	Base Stations
Mounting Type:	Surface Mount
Package / Case:	10-SMD, No Lead
Height (Max):	0.052" (1.33mm)
Size / Dimension:	0.276" L x 0.197" W (7.00mm x 5.00mm)

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SAW Filter Application Field and Working Principle

SAW filters are surface acoustic wave (SAW) devices used to filter out unwanted high frequency signals like noise and interference. SAW filters can be utilized in radio frequency (RF) applications as well as audio applications. They are commonly used in mobile devices, including cell phones, tablets, and smartwatches, and in automotive applications to control the vehicle\'s onboard communications systems.SAW filters are surface wave filters, meaning they are based on the surface acoustic wave (SAW) technology. They use the piezoelectric effect, whereby the electrical signals cause mechanical vibrations on the surface of a substrate, such as quartz. The vibrations propagate along the surface like a wave, and can be selectively amplified and filtered.A specific SAW filter, such as the B39191B5087H810, has specific application fields and working principles. It is mainly used in television receivers and digital television systems for signal filtering, as well as for wireless communications.The B39191B5087H810 SAW filter is a two-port filter with an input port and an output port. The filter consists of three layers: a substrate layer, a transducer layer, and a dielectric layer.The substrate layer is the base of the filter, usually made of pure quartz. The transducer layer, also known as the piezoelectric layer, is composed of a lower metal layer and an upper metal layer. The two metal layers are connected with an inter-layer metal conductor pattern, and are separated by a piezoelectric material. This layer is responsible for converting voltage signals into mechanical vibrations, and vice versa.The dielectric layer sits atop the transducer layer, and is composed of a variety of material, including ceramic and metal. This layer determines the frequency response of the filter, by acting as a frequency-dependent directional coupler.When a filter, such as the B39191B5087H810, is in use, it will be exposed to varying frequencies. Depending on the frequencies, the dielectric layer will either filter out or amplify certain frequencies. This is how the filter works to selectively filter out and amplify signals from a certain frequency range.In conclusion, SAW filters like the B39191B5087H810 are utilized in various application fields, such as television and mobile devices, and have specific working principles. They use piezoelectricity to convert voltage signals into mechanical vibrations, and utilize a dielectric layer to filter out and amplify certain frequencies. By using SAW filters, unwanted signals can be eliminated, and communication systems can be more reliable and improved.

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