Abstract
The paper has reviewed the worldwide attempts to improve the performance of microwave tube (MWT) interaction structures and MWTs employing them, accruing the exotic properties of metamaterials (MTMs). The review has encompassed the investigations based on theoretical study, using electromagnetic analysis and/or simulation, as well as experimental study. The success of and challenges to face in developing MTM assisted MWTs have also been highlighted.
Acknowledgement
Raktim Guha is thankful to the Council of Scientific and Industrial Research (CSIR) for granting the Senior Research Fellowship to him. Zhaoyun Duan owes to the national Natural Science Foundation of China (NSFC) to support part of this work under Grant Nos. 61871095, 62131006, and 61921002. Xianfeng Tang is indebted, for supporting part of this work, to the Fundamental Research Funds for the Central Universities under Grant No 2682021CX072.
Disclosure statement
No potential conflict of interest was reported by the author(s).