SD25-1950R9UBM1

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RF (Radio Frequency) diplexers are components used in a wide variety of radio communication systems to allow multiple signals to be sent over the same channel or signal path. They are most commonly used in duplex radio systems, where they are used to separate a single antenna input into separate frequency bands.

The SD25-1950R9UBM1 is an RF diplexer that is widely applied in many radio communication systems used in today’s mobile and fixed network base stations. It is a wide-band diplexer covering the frequency range from 1840 to 1990 MHz and is ideal for use in mobile base station duplexers and diplexers.

Application Field

The SD25-1950R9UBM1 diplexer offers low insertion loss, excellent intermodulation performance and high power handling capability, making it suitable for use in systems requiring superior RF performance. The diplexer covers two bands – the lower band (1840-1945 MHz) and the upper band (1945-1990 MHz) – with 0.3 dB insertion loss. It is also immune to external interference and is effective in blocking unwanted signals. Additionally, the diplexer can be used in systems that require high power handling capability (1500W).

It is ideal for applications such as cell tower diplexers and base station splitters. It is also suitable for use in low noise cellular systems that require low insertion loss and increased path isolation. Furthermore, it provides superior performance in radio receiver systems where lower antenna interference and minimum signal loss are desired.

Working Principle

The SD25-1950R9UBM1 RF diplexer works by splitting a frequency signal into two separate bands, the lower and the upper band, with a set bandwidth. The bandwidth of each band is determined by the filter components that are used: Low Pass Filters (LP) and High Pass Filters (HP). The LP filter is used to pass frequencies below the cutoff frequency, while the HP filter is used to pass frequencies above the cutoff frequency.

The diplexer also features an Isolator that reduces crosscoupling between bands. The isolator is usually incorporated into the diplexer to ensure that signals that are passed to one band are blocked from entering the other band. The isolator is designed to exceed a certain attenuation level between the two bands, providing improved port-to-port isolation and thereby providing improved performance in the end application.

The SD25-1950R9UBM1 is also designed to provide improved temperature stability. It features a thermal compensation circuit, which ensures that the performance remains consistent during different temperature conditions.

Conclusion

In conclusion, the SD25-1950R9UBM1 is a wide-band RF diplexer that is widely used in many radio communication systems for base stations. It is designed for superior performance, with low insertion loss, superior blocking characteristics, high power handling capability (1500W) and excellent thermal stability. It is an ideal choice for applications where superior RF performance is desired.

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