FAR-G5KL-911M50-D4XA-Z

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Surface Acoustic Wave (SAW) filters consists of interconnected electrodes deposited or etched on a piezoelectric material. Though this material is generally crystalline in structure, a number of non-crystalline materials have also been employed in SAW devices. When a suitable electrical signal is applied to the electrodes on the piezoelectric material, acoustic waves propagate along the surface of the material. These acoustic waves, just like any other type of wave, can be refracted, scattered, absorbed and transmitted.

The FAR-G5KL-911M50-D4XA-Z, is one such SAW Filter and is primarily employed in mobile communication systems for processing radio frequency (RF) and intermediate frequencies (IF). It works by using SAW resonators for allocating the desired frequency range and hence suppressing the undesirable frequency range. This SAW filter is designed to pass frequencies ranging from 729 MHz to 806 MHz, providing a fast response time with high passband selectivity. It contains 18 pairs of interdigitated transducer (IDT) electrodes which are etched on a YZ-LiTaO3 substrate.

The structure of the YZ-LiTaO3 material reacts to the application of electrical energy by producing an acoustic wave, which propagates along the waveguide formed by the transducers. This wave will then experience a transition from one waveguide to the next and will also experience a pass-band effect. This pass-band effect is achieved due to the resonance of the transducer, which is responsible for the required selectivity in frequency.

The design of the FAR-G5KL-911M50-D4XA-Z SAW filter consists of four terminal IDT electrodes, etched onto the piezoelectric substrate, which are connected in series. The common feature of the IDTs is that they consist of a number of finger interdigitated metal fingers. The IDTs react to the input signal concurrently and the output signal is then extracted from the last electrode. The most important feature of SAW filters is that it offers a high selectivity in both frequency and time domain characteristics.

As the waves propagate along the surface of the substrate, they will be refracted, scattered and absorbed resulting in the desired frequency range being allowed to pass. This band pass characteristic of the SAW filter allows the desired signal to be passed while the unwanted frequencies are suppressed. The SAW filter also offers high immunity to temperature fluctuations and other environmental factors. The FAR-G5KL-911M50-D4XA-Z SAW filter is suitable for use in applications which require minimal interference and high passband selectivity.

In conclusion, the FAR-G5KL-911M50-D4XA-Z SAW filter is a highly reliable device which offers a high passband selectivity. It works on the propagation of acoustic waves along the surface of the piezoelectric substrate and is suitable for use in mobile communications for processing RF and IF signals. The filter offers high immunity to temperature fluctuations and other environmental conditions and is widely found in many commercial and military applications.

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