SD25-0897R9UBM1

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RF diplexers are a class of electronic components which are used for the purpose of dividing an RF signal into two separate and distinct frequency bands. The SD25-0897R9UBM1 is an example of an RF diplexer. This component is designed to allow transmission of two separate signals in the frequency range of 890 to 960 MHz.

Application Field

The SD25-0897R9UBM1 can be used in a variety of applications. It is often used in cellular networks, where it is used to separate high and low frequencies within a band. It can also be used to isolate a signal transmitter from a signal receiver. This component can also be used for interference suppression in wired and wireless communication channels. Additionally, it is commonly used in radio, television, and satellite communications.

Working Principle

The SD25-0897R9UBM1 uses two filters to divide a single frequency band into two separate frequencies. The first filter isolates the lower frequency range from the higher frequency range, while the second filter isolates the higher frequency range from the lower frequency range. This separation allows the two frequencies to be transmitted separately. The filters are constructed from series capacitors and coils, which are connected in pairs to form two transmission lines. The transmission lines are then connected in parallel to form a transmission bridge.

The transmission bridge is designed so that its input is connected to the two frequencies desired to be separated. These two frequencies are divided by the bridge, and each is then connected to separate outputs. The frequency response of the device is constant over its operating frequency range, which is 890 to 960 MHz. In order to maintain a constant frequency response, the component must be tuned correctly.

The SD25-0897R9UBM1 is capable of handling signals up to 3 W of power. It has an insertion loss of no more than 4.3 dB, with an insertion loss at the design frequency of 2.7 dB typical. The device is housed in a RoHS compliant plastic housing, which makes it suitable for applications in harsh environmental conditions. It has an excellent return loss of ≥20 dB up to the highest frequency.

Conclusion

The SD25-0897R9UBM1 is a high-performance RF diplexer designed to separate two frequencies within the 890 to 960 MHz range. It is ideal for applications such as cellular networks, interference suppression, and wireless or wired communication systems. The component can handle up to 3 W of power, with an excellent return loss of ≥ 20 dB up to the highest frequency. It is housed in a RoHS compliant plastic housing, which makes it suitable for use in harsh environmental conditions.

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