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Multipactor prediction in novel high-power low-pass filters with wide rejection band

In this paper, the multipactor breakdown is studied in a novel design of high-power low-pass filters with wide rejection band. In classical filter design techniques, there exists a trade-off between the height of the mechanical gaps and the width of the rejected band, which makes difficult the design of filters simultaneously having wide mechanical gaps and rejected bands. These limitations are avoided by our new design based on a high-power low-pass filter cascaded with a quasi-periodic continuous profile following Bragg reflection theory. To show this, the power handling capability of the new design fulfilling stringent frequency behaviour has been first predicted using the classical parallel-plate theory, as well as following a more advanced method which considers the real electromagnetic field distribution in the component.