Coupling structure for a high Q corrugated cavity as a microwave undulator

Zhang, Liang and He, Wenlong and Donaldson, Craig R. and Clarke, Jim and Ronald, Kevin and Phelps, Alan D. R. and Cross, Adrian W. (2019) Coupling structure for a high Q corrugated cavity as a microwave undulator. IEEE Transactions on Electron Devices, 66 (10). pp. 4392-4397. ISSN 0018-9383 (

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Microwave undulators can achieve smaller wiggler periods when compared with permanent magnet undulators. This work follows on the design of a microwave undulator composed of a corrugated waveguide operating at 36 GHz. Compatible end caps and coupling structures for the waveguide to form a complete cavity were studied and are presented in this paper. Their design is scalable for different operating frequencies and periods of the corrugated waveguide. A set of empirical equations, that allows the geometry to be determined analytically, were found from the post-processing of the FDTD simulation. The support of the STFC UK (Cockcroft Institute Core GrantR160525-1) is gratefully acknowledged. This work is supported by European Union (EU) Horizon 2020 Project “CompactLight” 2017-2021. “CompactLight” grant code: 777431-XLS. Published data 31 Oct 2019, under Self-archiving / 'green' OA.


Zhang, Liang ORCID logoORCID:, He, Wenlong ORCID logoORCID:, Donaldson, Craig R. ORCID logoORCID:, Clarke, Jim, Ronald, Kevin ORCID logoORCID:, Phelps, Alan D. R. ORCID logoORCID: and Cross, Adrian W. ORCID logoORCID:;