RF hybrid combiner is an important RF device widely used in fields such as wireless communication, radar, broadcasting and television, and electronic countermeasures. Its main function is to combine multiple input signals into one output signal, or to divide an input signal into multiple output signals, while ensuring the power distribution and isolation requirements of the signal.

　　The working principle of RF hybrid combiners is based on microwave circuit theory, usually designed with strip lines, microstrip lines, or cavity structures. According to different application scenarios and requirements, RF hybrid combiners can be divided into various types such as power synthesizers, power dividers, duplexers, and multiplexers. The power synthesizer is mainly used to combine multiple low-power signals into a high-power signal, the power distributor is used to divide a high-power signal into multiple low-power signals, and the duplexer and multiplexer are used to achieve the separation of transmission and reception of signals in different frequency bands in the same device.

　　The key performance indicators of RF hybrid combiners include insertion loss, isolation, power capacity, and frequency range. Insertion loss refers to the energy loss when a signal passes through a combiner, isolation degree refers to the degree of signal isolation between different ports, power capacity refers to the maximum input power that the combiner can withstand, and frequency range refers to the bandwidth of the combiner's operation. These indicators directly affect the overall performance and reliability of RF systems.

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