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RF Diplexers

A diplexer is an electronic device that separates a signal into two parts, or “bands.” RF diplexers are used in applications where a single input signal is split into two separate frequency bands that can then be split further into multiple bands with different characteristics.

The CER0207A is a multi-band RF diplexer specifically designed for the cellular and multimedia commercial applications. This device consists of two identical bandpass filters, which are arranged in series to provide several hundred MHz of operating bandwidth. It provides excellent input/output isolation, superior temperature stability, and low insertion loss in its specified frequency range.

Application Fields and Working Principle

The CER0207A is typically used in cellular applications such as CDMA and WCDMA systems. This device is also suitable for applications in a variety of other industries such as GPS, base station and trunking systems due to its high performance and small size. It can be used in a variety of custom applications as well.

The CER0207A works by splitting a single input signal into two frequency bands and then further splitting each band into multiple bands with different characteristics. The device utilizes a combination of low-pass, high-pass, and band-pass filters which are tuned to the desired frequencies using either external or on-chip varactors in order to provide the necessary performance.

The device features a wide range of settings and parameters to accommodate any custom application, such as adjustable bandwidths, attenuation levels, and gain levels. The CER0207A also has a very low noise figure, making it ideal for applications that require high noise performance.

The device also features very low insertion loss over its operating bandwidth, which enables it to reduce the size of the overall system while still providing a high level of signal integrity. The CER0207A also has an excellent temperature stability, making it suitable for applications that require precise performance over a wide temperature range.

Conclusion

The CER0207A is an ideal multi-band RF diplexer device for applications in cellular and multimedia systems. It provides a wide range of settings and parameters to accommodate different custom requirements, It offers a high level of performance with a low insertion loss and excellent input/output isolation combined with very low noise figure and wide temperature stability.

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