CER0455B

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Ceramic filters are used extensively in a variety of applications where high frequency signal filtering is required. The most common type, CER0455B, is widely used in telecommunications, broadcasting, and broadband systems. It is also found in measurement instruments, audio equipment, cable TV, and medical and military-related equipment. In this article, we will discuss the application field and working principle of the CER0455B ceramic filter.

CER0455B is a high-performance, 10 pin, 6.0 mm × 7.3 mm surface-mounted ceramic filter designed for high frequency signal filtering in communications, ISM bands, radio, and audio. It is designed to provide a low insertion loss and high rejection of unwanted signals for frequencies up to 3.5 GHz. The operating temperature range is -30 to +105 Celsius.

The filter includes a ceramic substrate, an integrated capacitor, a resonator, and a ground plane. Its metal top conductor and bottom conductor are tin-plated for improved current carrying capacity. The capacitance is adjusted using five integrated pads, which are then encapsulated in ceramic. The ceramic substrate is made of alumina, for improved isolation properties and temperature stability. The filter exhibits low insertion loss across the whole frequency range and high isolation in the stop bands.

To ensure a good filter performance, the CER0455B must be installed in a grounded environment. The preferred installation method is to solder the filter directly onto the ground plane, although a variety of other mounting options are available. The filter has been tested and verified to meet the requirements of the International Standard F956932 (version 5.1) for HF filters. The CER0455B is compliant with the European RoHS directive.

In its application field, CER0455B can be used in a variety of communications systems. It is effective in suppressing interference in WiFi, Bluetooth, WiMAX, and ZigBee systems. The filter is also employed in base stations, mobile phones, and satellite systems to help reduce interference from external sources. In addition, it can be used in medical applications to reduce electromagnetic interference from medical equipment. The filter is also found in broadcast networks and audio systems, where it is used to help reduce low frequency noise and to improve audio fidelity.

The working principle of CER0455B is based on two principal components: the capacitor and the resonator. The capacitor couples the RF energy from the input line to the resonator, and functions as an impedance matching element. The resonator, meanwhile, passes only the desired frequency spectrum, while rejecting the rest. This operation is aided by a ground plane, which provides the necessary return path for the RF energy. The filter also utilizes a metal top conductor and a tin-plated bottom conductor for improved current carrying capacity.

The CER0455B is a versatile and efficient ceramic filter that can be applied in a variety of fields. Its low insertion loss and high isolation in the stop bands make it a suitable choice for a variety of signal filtering applications. Furthermore, its extensive compliance with various standards demonstrates its reliability and performance.

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