CER0206A

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Ceramic filters are widely used in the wireless communication infrastructure due to their excellent performance in terms of insertion loss, return loss, out-band rejection level, and isolation. This article will look at the CER0206A ceramic filter from Apogee Electronics Corporation and discuss its application field and working principle.The CER0206A ceramic filter is a balun-based filter designed for use in the narrowband HF/VHF/UHF bands. The filter provides excellent rejection of out-of-band signals, while allowing in-band signals to pass with minimal attenuation. The device is a wideband, three-port filter, which means that it can act as either a high-pass or low-pass filter, depending on the application. Specifically, the CER0206A ceramic filter can be used as an input band-pass filter, an input notch filter, and as an output low-pass filter.The CER0206A is a wideband filter that allows for a maximum passband of up to 30MHz. It is designed to be used in environments where high-performance filtering is needed, such as radar, synthesizers, or test and measurement. The CER0206A is also suitable for use as an input filter for an antenna, where high out-of-band rejection is required.The CER0206A ceramic filter is constructed from two substrates which are bonded together with an adhesive. The first substrate contains a series of capacitors that provide the primary filtering. These capacitors are surface-mounted to the substrate and arranged in an overlapping pattern for increased filtering performance. The second substrate contains another series of capacitors, this time arranged in a parallel pattern, which provide the secondary filtering. The two substrates are then bonded together to form a single device, with the capacitors arranged in a serpentine pattern that increases the filter\'s selectivity and narrows the filter\'s passband.The CER0206A ceramic filter works by blocking out-of-band frequencies and allowing in-band signals to pass with minimal attenuation. This is achieved through the use of two filter circuits, which are comprised of capacitors, inductors, and resistors. The first filter circuit works to “sharpen” the filter\'s response in order to reduce the amount of out-of-band signals that are allowed to pass through the device. The second filter circuit further reduces the signal level by adding an additional level of out-of-band signal suppression.In summary, the CER0206A ceramic filter from Apogee Electronics Corporation provides excellent performance in terms of insertion loss, return loss, out-band rejection level, and isolation. It can be used as an input band-pass filter, an input notch filter, and as an output low-pass filter. The device is constructed from two substrates, which are bonded together with an adhesive and contain two filter circuits comprised of capacitors, inductors, and resistors. These two filter circuits work together to block out-of-band frequencies and allow in-band signals to pass with minimal attenuation.

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