RF1295C

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Surface acoustic wave (SAW) filters are filter devices based on the propagation of acoustic waves across a surface acoustic wave transducer. SAW filters are constructed by connecting a series of acoustic components such as reflectors, combiners, capacitors, and delays in order to form a passband or bandstop filter. In various applications SAW filters have become the most preferred choice for their wide array of advantages such as minimal complexity, small size, low cost, low power consumption, and reliable and accurate performance. Among the various types of SAW filters, the RF1295C is one of the most versatile and widely used types.

The RF1295C is a low cost and reliable SAW filter with a working frequency range of 824–878 MHz and a passband of 55 MHz. The RF1295C SAW filter is designed to achieve high performance in cellular and wireless communication systems. Its primary application includes base station front-end systems, cellular phones, multi-standard handsets, land mobile radio systems, indoor distributed antenna systems, repeaters, and wideband communication systems.

The power handling capability of a RF1295C SAW filter is dependent on its structure. It consists of two piezoelectric substrates, on each of which electrodes are printed. The lower part of the filter is composed of the input transducer, a guarding shield, an inter-digital transducer (IDT), and an output transducer. The upper part of the filter contains the controlling electrodes, which consist of a reflector and a combiner. The combination of these two elements creates an acoustic wave whose propagation is limited to a certain length depending on the number of IDTs present. This restricts the acoustic wave within the filter and results in high power handling capability.

The operation of the RF1295C SAW filter is based on the principle of piezoelectricity. It is in this principle that when an alternating voltage is applied to certain materials, they expand and contract in synchronism with it. By means of this principle, the RF1295C SAW filter is able to convert electrical signals into surface acoustic waves and back to electrical signals again. This conversion is achieved by energizing IDTs, which send and receive signals in the form of acoustic waves. The acoustic waves follow the same path inside the filter which is determined by the control electrodes, and thus the desired filtering effect is achieved. Due to its high power handling capability, the filter is able to process high-power signals without distortion.

The RF1295C SAW filter is also found to be stable over temperature and environmental loadings. Its ability to withstand high power and temperature makes it an ideal choice for a variety of applications. Its compact size, low cost, and reliable performance give it an edge over other types of SAW filters. This makes it a preferred choice for multiband wireless communication systems like cellular and PCS. The RF1295C SAW filter can also be used in narrowband RF applications such as medical ultrasound imaging and satellite communications.

Overall, the RF1295C is a robust and reliable SAW filter with excellent performance characteristics. It is designed to deliver excellent results for both indoor and outdoor wireless applications. Its wide operating frequency range, coupled with its power handling capability, makes it one of the most versatile SAW filters in the market. With its remarkable performance and low-cost features, it is no wonder that the RF1295C has become the go-to SAW filter when it comes to commercial and industrial applications.

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