An Original Approach for Microfabrication of Metamaterials Patterns for Millimeter-Band Vacuum Microelectronic Devices

Recently, use of metamaterials (MTMs) in vacuum electron devices attracted a great interest.
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Among possible applications of these is incorporation into the substrate for planar slow-wave structures. Traveling wave tubes (TWTs) based on the planar slow-wave structure have compact design, wide bandwidth, use high-aspect-ratio sheet electron beams, and etc. Use of MTMs in planar TWTs could be advantageous in several ways by increasing the working bandwidth, suppressing parasitic self-excitation, etc.
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