AFS20A42-1575.42-T3 Filters

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Surface Acoustic Wave (SAW) Filters have become increasingly popular in the past years because of their relatively low-cost, large bandwidth, and good temperature stability. A SAW filter consists of two electrodes – the receiving and the transmitting electrodes – placed on top of the surface acoustic wave device. The electrodes are known as the transducers. The SAW filter’s purpose is to selectively transmit signal within a specific range of frequencies while rejecting other frequencies. This article will focus on the application field and working principle of AFS20A42-1575.42-T3, a SAW filter.

The AFS20A42-1575.42-T3 has a frequency of 1575.42 MHz, making it a suitable selection for mobile communication systems. This appealing frequency makes the SAW filter ideal for use in mobile cellular communications such as Global Systems for Mobile communications (GSM), AMPS, CDMA, and PCS. With this frequency range, the AFS20A42-1575.42-T3 can also be used for Wi-Fi communication systems.

The AFS20A42-1575.42-T3’s working principle is based on the design of its electrodes, which are made up of distinct micro-electro-mechanical (MEMS) structures. These MEMS structures are designed to generate a transverse wave in the surface acoustic wave device. This wave is then propagated along the device when the voltage is applied. The wave propagates with a certain phase velocity which is given by the ratio of wavelength to period. When the signal reaches the open terminal end of the device, a reflection is generated and propagates in the opposite direction. When the reflected signal passes through the receiving electrode, it is converted back into an electrical signal, thus providing selectivity and amplification.

The AFS20A42-1575.42-T3 SAW filter also helps isolate harmonics and spurious signals in order to reduce the amount of noise generated. This allows for the device to operate at a lower power level and consume less energy. Additionally, the AFS20A42-1575.42-T3 is a passive SAW filter, meaning it has no moving or mechanical parts, resulting in a smaller form factor and greater reliability.

In conclusion, the AFS20A42-1575.42-T3 SAW filter is an effective device for use in mobile communication systems with its relatively low cost, good temperature stability, and ability to isolate harmonics and spurious signals. It is based on the distinct design of its electrodes and the MEMS structures, which work to generate a transverse wave that propagates along the device when voltage is applied. This wave is then converted back into an electrical signal when it passes through the receiving electrode, providing selectivity and amplification. The device’s power consumption is also reduced thanks to its ability to isolate harmonics and spurious signals.

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