CER0781A Filters

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Ceramic Filters

Ceramic filters provide an agile way of changing the characteristics of a system or circuit in digital communication and other related fields. A representative and popular ceramic filter device is CER0781A. This article will discuss the application field and working principle of CER0781A.

Application Field of CER0781A

CER0781A, as a technological breakthrough in miniature ceramic filter market, is used in various digital communication applications up to 6GHz, from broadband applications ( WiFi 11n/ac, 2.4/5GHz) to satellite navigation applications (e.g. Beidou, GPS, Galileo, GLONASS).

CER0781A offers a low phase-noise performance and high linearity, together with a small high isolation of 23dB @ 2.4GHz. This ceramic filter finds a wide range of applications in wireless communication, satellite TV, bluetooth, DVB-T, LTE, WCDMA, WiMAX, UMTS, and GSM/EDGE receivers.

CER0781A is characterized by a high linearity which ensures an optimal signal quality with maximum power efficiently. The application and working principle of CER0781A are described in the following section.

Working Principle of CER0781A

CER0781A is a type of ceramic filter based on a classical multi-resonator structure. It is made of high-Q, low-loss, and temperature-stable ceramic material, which is used to form the distinct resonance peaks, and help to constrain the input-output power relationship.

Internally, CER0781A consists of two or more movable tuning circuits, which are alternately connected between two points of the filter. The circuits are positioned so that the desired filter characteristic is formed. These two or more tuning circuits can be separately adjusted to alter the relative amplitude and phase between the input and output of the filter, in order to achieve optimal performance.

CER0781A ceramic filter provides an agile way to modify the characteristics of a system or circuit. Unlike traditional filters, CER0781A has the ability to rapidly adapt to environmental changes. It can be used in a variety of applications such as making the design simpler, eliminating unnecessary components, and improving thermal performance.

CER0781A has an RF port impedance of 50 ohms, a low insertion loss, and a large stop-band attenuation which make it suitable for applications in which a broad stop-band is required. The ceramic filter also has a wide-range of operating frequencies which makes it well-suited for applications in which a wide frequency response is necessary.

Finally, CER0781A offers the following benefits: it is small, accurate, and cost-effective; it has a high Q value and low phase noise; it can easily be adjusted to adapt to environmental changes; and it has a wide range of operating frequencies.

Conclusion

CER0781A is a type of ceramic filter designed to modify the characteristics of a system or circuit. It has a wide range of applications in wireless communication, satellite TV, bluetooth, DVB-T, LTE, WCDMA, WiMAX, UMTS, and GSM/EDGE receivers. CER0781A is small, accurate, and cost-effective, with a high Q value and low phase noise. It has an RF port impedance of 50 ohms, a low insertion loss, and a large stop-band attenuation. CER0781A is well-suited for applications in which a broad stop-band and a wide frequency response are necessary.

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