Planar periodic surface lattices for use in millimeter-wave sources

MacLachlan, A. J.; Phipps, A. R.; Robertson, C. W.; Phelps, A. D. R.; Konoplev, I. V.; Cross, A. W.

doi:10.1109/irmmw-thz.2014.6956011

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“…To advance the performance parameters and extend the frequency range of vacuum electronic devices, electromagnetic structures that can enhance and control the mode selection process in the beam wave interaction region are being investigated. Various structures and materials such as diffractive surfaces [1], metamaterials [2], photonic structures [3], metadielectrics and periodic surface lattices [4] are being studied in different regimes of operation. The use of such diverse structures enables the wave dispersion to be engineered within its own discrete parameter space with often shared theoretical principles, and similar numerical modelling methods being used.…”

Section: Introductionmentioning

confidence: 99%

Millimeter-wave periodic surface lattices for mode control in vacuum electronic sources

MacLachlan

Phipps

Robertson

et al. 2017

2017 Eighteenth International Vacuum Electronics Conference (IVEC)

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Periodic surface lattice (PSL) structures of planar geometry have been designed, constructed and measured. The motivation is to study the evolution of electromagnetic fields stimulated by PSLs to improve mode control in overmoded structures in high power electron beam driven THz vacuum electronic sources. The results of studies of the planar structures are presented. Prior to the experimental studies numerical simulations have been carried out and results are compared with experimental measurements. It is demonstrated that volume and surface fields can couple so as to form a cavity eigenmode, which has the potential to be selectively and efficiently excited.

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