B39192B9428K610

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Surface Acoustical Wave (SAW) filters are fully integrated devices, which are used in areas such as handsets, and especially radio communications. They are specially designed to act as an analogue filter, providing selectivity and rejection. They are also used as a transmit-receive (Tx-Rx) duplexer, separating the frequencies in a single antenna, for both transmitting and receiving, by selecting the frequency in which the device will operate and rejecting all other signals.

B39192B9428K610 is one such SAW filter which is designed for use in the cellular radio handset system. This device is specifically designed to band select and reject unwanted frequencies, serving as a low-power, high-selectivity filter for either receive or transmit applications. It operates in the frequency range of 925MHz to 960MHz, with a nominal center frequency of 940MHz±12MHz.

The working of a SAW filter is based on the principle of acoustic wave propagation. They use two interdigitated transducers to generate and detect the acoustic wave.

The structure of SAW filter consists of two main parts: transducer and reflector. The transducer consists of a bed of piezoelectric material, such as quartz or lithium niobate. It is a combination of interdigital and single finger transducers that launch and receive the acoustic wave. The reflector is a pattern of fingers, which reflects the acoustic wave and directs it towards the transducer.

The interdigitated transducers generate the acoustic wave on the quartz slab. This acoustic wave then propagates through the quartz slab and is reflected by the fingers on the reflector pattern. The reflected wave is then detected by the interdigitated transducers and converted into an electrical signal.

B39192B9428K610 utilizes the acoustic wave detection principle to select the desired frequency. It has two sections, one for input and one for output. When a signal is applied to the input section, the transducer generates the acoustic wave and propagates through the quartz layer. The reflected wave is then detected and rectified at the output. Only the desired frequency is selected while other frequencies are rejected. This process enables the filter to filter out unwanted frequencies from the signal.

B39192B9428K610 is primarily used in cellular radio systems. It is designed to filter out the unwanted frequencies from the signal to improve the signal quality and reduce interference. It can also be used to separate the transmitted and received signals in a single antenna. It has excellent isolation and insertion loss characteristics and operates in the frequency range of 925MHz-960MHz.

In conclusion, B39192B9428K610 is a SAW filter primarily used in cellular radio systems to filter out unwanted frequencies and improve signal quality. It utilizes the principle of acoustic wave propagation to select the desired frequency and reject all other frequencies. This filter has excellent isolation and insertion loss characteristics and is designed for use in the frequency range of 925MHz-960MHz.

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