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Differences in Application Between Power Dividers and Power Splitters

应用文章

Introduction 

Power dividers are an RF microwave accessory constructed with equivalent 50 Ω resistance at each port. These accessories divide the power of a uniform transmission line equally between ports to enable comparison measurements. Power dividers provide a good impedance match at both the output ports when the input is terminated in the system characteristic impedance (50 Ω). Once a good source match has been achieved, a power divider is used to divide the output into equal signals for comparison measurements. The power divider also can be used in test systems to measure two different characteristics of a signal, such as frequency and power, for broadband independent signal sampling. Besides dividing power it also can act as power combiners because they are bi-directional. 

Power splitters are constructed of two resistors. They are used for leveling and ratio measurement applications to improve the effective output match of microwave sources. The two-resistor configuration also provides 50 Ω output impedance to minimize measurement uncertainty in source leveling or ratio measurement applications.

Table of Contents

  • Power Divider Applications
    • Low power signal distribution to two antennas
    • Intermodulation distortion (IMD) measurements
    • Diversity gain measurements
  • Power Splitter Applications
    • Gain, compression, and isolation measurements
    • Rationing or leveling
  • Conclusion

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