Abstract: | As a key component of microwave power synthesis for spaceborne radar, the multipactor performance of the Butler matrix directly determines the power capacity of the radar payload. Therefore, it is necessary to analyze and verify its multipactor characteristics. In response to this requirement, this paper innovatively proposes a spaceborne Butler matrix for high-power dynamic synthesis network, and then analyzes and verifies its multipactor characteristics under the vacuum condition. The following research is carried in this paper. First, this paper proposes a high-power Butler matrix for spaceborne radar, and analyzes its power synthesis performance. Second, in order to study the multipactor performance of the Butler matrix in detail, this paper carries out the multipactor power threshold simulation and free electron distribution analysis for the proposed Butler matrix. Third, in order to verify the correctness of the analysis results, this paper conducts a multipactor test with a peak power of 14kW, which verifies its microwave transmission power capacity in a high-power vacuum environment. The Butler matrix proposed in this paper has excellent performance, and provides theoretical methods and key technical support for future spaceborne radar high-power microwave components. |