B39242B8850P810

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SAW filters can be broadly classified into two types; structural SAW filters and surface acoustic wave (SAW) filters. Both types are used to filter, shape, and amplify radio frequency (RF) signals. The B39242B8850P810 is a SAW filter designed for use in mobile communication systems, specifically the GSM-900 and EDGE applications.

The exact working principle of the B39242B8850P810 SAW filter is dependent on the principles of acoustic wave theory. This theory proposes that acoustical waves are generated by a transducer in the form of transverse vibrations that propagate through a specific medium, such as quartz crystals or metal and ceramic substrates. These vibration waves will travel through the medium and eventually reach the surface of the medium where they will be reflected in a variety of ways.

When an RF signal of a certain frequency is applied to the transducer, the vibrations will travel through the medium and interact with the surfaces of the medium. Upon reaching the surface of the medium, the vibrations are partially reflected and partially absorbed, and this absorption depend upon properties of the medium, such as its permeability and permittivity. Thus, the absorption of the signal can be manipulated by altering the parameters of the medium.

The B39242B8850P810 is a surface acoustic wave (SAW) filter, meaning it utilizes a surface acoustic wave traveling through an interdigital transducer (IDT) structure. The IDT consists of two electrodes which act as the transmitter and receiver transducers. The electrodes of the IDT are used to excite the surface acoustic wave and to detect and output the filtered RF signal. The electrodes are fabricated from metallic materials such as silver, zinc, and gold, and the filter is manufactured using a lithography and anisotropic etch process, which allows for a design with fine, and precisely controlled features.

In the B39242B8850P810 SAW filter, the electrodes are designed into a specific shape, or pattern, which directs the acoustic wave along the substrate in a predetermined path and reduces unwanted frequencies. This design also establishes the cutoff frequency (fc) of the filter, which is the point at which the filter begins to attenuate or reject energy. The height of the electrodes also controls the phase characteristics of the filter. The amplitude characteristics, meanwhile, are determined by the bandwidth of the filter and the slope of the frequency response curve.

The specific application of the B39242B8850P810 SAW filter is its use in mobile communication systems such as GSM-900 and EDGE. The filter is designed to perform a variety of functions such as frequency selection, channel selection, signal routing, and signal suppression. It helps to reduce noise and interference in these mobile communication systems. Additionally, the B39242B8850P810 is designed to offer a wide dynamic range while emphasizing low distortion and high linearity.

In conclusion, the B39242B8850P810 is part of a family of SAW filters which are used in a variety of applications in mobile communication systems. The working principle of the filter is based on the principles of acoustic wave theory which involves the excitation and absorption of RF signals at the surface of the medium. The filter is specifically designed for GSM-900 and EDGE applications in order to reduce noise and interference, and to provide a wide dynamic range with low distortion and high linearity.

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