A certain degree of isolation should be ensured between the output ports of a power divider. Power dividers, also known as overcurrent dividers, are divided into active and passive types. They can evenly distribute one signal into several outputs. Generally, each split has a few dB of attenuation, and the attenuation varies depending on the frequency of the signal. To compensate for the attenuation, passive power dividers are made by adding amplifiers.

　　The technical specifications of a power divider include frequency range, power capacity, distribution loss from main to branch, insertion loss between input and output, isolation between branch ports, and voltage standing wave ratio at each port.

　　1. Frequency range:

　　This is the working premise of various RF/microwave circuits, and the design structure of power dividers is closely related to the operating frequency. The operating frequency of the distributor must be clearly defined before proceeding with the following design.

　　2. Enduring power:

　　In high-power splitters/synthesizers, the maximum power that circuit components can withstand is the core indicator, which determines what form of transmission line can be used to achieve the design task. Generally, the order of power carrying capacity of transmission lines from small to large is microstrip line, strip line, coaxial line, air strip line, and air coaxial line. The choice of transmission form should be based on the design task.

　　3. Distribution of losses:

　　The allocation loss from the main path to the branch is essentially related to the power allocation ratio of the power divider. The distribution loss of a two divided power divider is 3dB, and the distribution loss of a four divided power divider is 6dB.

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