Journal
EPJ APPLIED METAMATERIALS
Volume 8, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/epjam/2021001
Keywords
Metamaterial; klystron; miniaturization; high power; high efficiency
Categories
Funding
- National Natural Science Foundation of China [61871095, 61921002, 61531010]
- CNS project [Y03111023901014005]
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Electromagnetic metamaterials (MTMs) are artificially structured media with exotic electromagnetic properties, attracting great attention in recent years. MTM klystrons in the microwave band have shown remarkable advantages, paving the way for high-performance new klystrons.
As a kind of artificially structured media, electromagnetic metamaterials (MTMs) have exotic electromagnetic properties that are not found or difficult to achieve in natural materials. This class of metal/dielectric-structured artificial media has attracted great attention during the past two decades and made important breakthroughs. A variety of passive and active devices based on MTMs have been developed rapidly. Especially MTM klystrons, which show very remarkable advantages, including miniaturization, high gain, and high efficiency in the microwave band. MTM extended interaction klystrons creatively combine the advantages of MTMs, extended interaction technology, and klystrons. It provides a new design idea for the development of brand-new klystrons with high performance. In this review paper, we report the recent advances in MTM klystrons including MTM extended interaction oscillator and MTM extended interaction klystron amplifier. Furthermore, the prospects and challenges of MTM klystrons are discussed. Finally, the development trend is concluded.
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