The power divider (DIVIDER) and the power splitter (SPLITTER) are very similar in length, and the function is to divide the signal of one way into two paths. Are there differences between the two? Sometimes it's really silly and indistinct. In fact, the basic difference between them is that the internal resistance structure used to separate power is different.
Power splitter (SPLITTER), built-in two 50Ω resistors, only the input port is 50Ω, the other port is 83.3Ω. Used to improve output and source matching in level and ratio measurements, thereby minimizing measurement uncertainty.
The power divider (DIVIDER), built-in three 16 2/3 Ω resistors, each port is 50Ω, is used to separate the source signal into two equal parts for comparison measurement. The power splitter provides good impedance matching at both output ports. It can also be used to measure different properties of two output signals, such as frequency and power. The power splitter can also be used for the combination of two signals because these ports are bidirectional.
Figure 1 Power splitter Figure 2 Power splitter
In level and ratio measurement applications, power is sampled from one branch, and the three-resistor structure results in a poor source match, which in turn causes severe ripple in the calibration point or reference trace. The point “A†in Figure 1 is held at a constant level and can be seen as a source of 0 impedance. At this time, the output impedance of the output arm is equal to the 50Ω resistance of the output arm, and if a three-resistor divider is used ( Figure 2) will result in an output impedance of 16 2/3 Ω or a VSWR mismatch of 3:1, leading to severe measurement uncertainty. In this application, the 11667A/B/C of Keysight's two-resistor structure provides 50Ω output impedance, which minimizes the uncertainty.
Power splitter power divider
Application examples
Power splitter
Using a scalar network analyzer for ratio measurement (transmission)
Using a scalar network analyzer for ratio measurement (reflection)
Power distributor
DIVIDER applications such as:
1. Allocate low-power signals to two antennas
2. Intermodulation distortion test
The application of power splitters (SPLITTER), such as:
1, gain, gain compression test
2, ratio and level measurement
or
I believe that through the introduction of this article, you should have a clear understanding of the power divider and power splitter.
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