MP043

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Crystals are solid materials composed of atoms or molecules that are arranged in a very structured, symmetrical pattern. They are very important in electronics and communication, since they can be used to control the frequency or phase of an electromagnetic wave. The MP043 is an example of a crystal of this type that is widely used in communication and military applications.

The MP043 is a surface acoustic wave filter designed to provide a narrow band pass filter to frequencies in the range of 500MHz to 1.2GHz. It is made of an AT cut quartz cylinder that has been processed on the surface to form two series connected half-wave surface acoustic wave transducers that are aligned and spaced in a linear array. The two transducers act as equivalent length acoustic waveguides to produce a phase shift of 180° of the RF signal as it propagates along the length of the crystal. The resulting band pass characteristic of the filter is dependent on the acoustic velocity, the geometry of the transducers and the distance between them.

As well as the traditional applications for MP043 crystals, such as for frequency control of radio transmitters and receivers, they are also used for a wide range of other applications. In radar systems, they are used to control the frequency of the system and in sonar systems they can be used to stabilise the frequency. Moreover, they can be used to modify high frequency signals in order to produce frequency combs, harmonic frequencies, and to provide bandwidth control. In modems they are commonly used to provide the reference clock for digital signals.

MP043 crystals are also used in digital electronic systems such as those employed in computers, wireless communication devices and mobile phones. Their use allows the digital devices to accurately convert digital signals into analog signals, and vice versa. They are highly stable and can be used in clock generators, pulse shaping circuits and clocks for memory and logic systems. In addition, they can be used in radio frequency (RF) circuits for frequency synthesis, filtering, and control of frequency and amplitude for communication systems.

The key to the success of the MP043 crystal lies in the construction of the surface acoustic wave filter. The two transducers are able to create a narrow frequency passband which is dependent on their geometry and the acoustic velocity of the material. Due to the fact that this is a quartz crystal, it has the ability to provide greater stability over longer periods of time than many other filter designs. This is why they are so well suited to applications where accuracy and stability over time are important.

In conclusion, the MP043 is a quartz crystal which is widely used in electronics and communication devices. It is a surface acoustic wave filter which uses two series connected transducers to produce a phase shift of 180° for frequencies in the range of 500MHz to 1.2GHz. It has a range of applications from frequency control of radio transmitters and receivers to digital devices, where it provides reference clock for digital signals. The particular advantage of the MP043 is the stability it provides over time, making it suitable for use in applications where accuracy and stability are key.

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