[1] Zhang Shanjie, Shen Yaochun. Eigenmode sequence for an elliptical waveguide with arbitrary ellipticity[J]. IEEE transactions on microwave theory and techniques, 43, 227-230(1995).

[2] Wang Keqiang, Li Tianming, Hao Li et al. A broadband TE01–TE 11 mode converter with elliptical section for gyro-TWTs[J]. IEEE Transactions on Microwave Theory and Techniques, 67, 3586-3594(2019).

[3] Liao Xiaoyi, Wu Zeiwei, Wang Jianxu et al. Design of a TE01-mode waveguide bend based on an elliptical waveguide structure[J]. IEEE Transactions on Microwave Theory and Techniques, 67, 906-914(2019).

[4] Nshimirimana Robert, Abraham Ajith, Nothnagel Gawie. A multi-objective particle swarm for constraint and unconstrained problems[J]. Neural Computing and Applications, 1-31(2021).

[5] Barker J., Schamiloglu E.. High-Power Microwave Sources and Technologies(2001).

[6] Niu X, Yu X, Li S et al. High-power TE01–TE11 mode converter for gyroklystron[J]. Journal of Fusion Energy, 32, 426-430(2013).

[7] Yu X, Deng J, Cao W et al. Method for Synthesis of TE01-TE11 Mode Converter for Gyrotron by the NURBS Technique[J]. Microwave Theory & Techniques IEEE Transactions on, 63, 326-330(2015).

[8] Xu Le, Niu Xin-jian. 8mm high power TE01—TM11 mode converter in overmoded waveguide[C], 487-488(2009).

[9] THUMM M. High-power millimetre-wave mode converters in overmoded circular waveguides using periodic wall perturbations[J]. International Journal of Electronics, 57, 1225-1246(1984).

[10] Blanch G., Abramowitz M., Stegun I.[M]. Handbook of Mathematical Functions, 721-750(1964).

[11] Gutiérrez-Vega J C, Rodrıguez-Dagnino R M, Meneses-Nava M A et al. Mathieu functions, a visual approach[J]. American Journal of Physics, 71, 233-242(2003).

[12] Bibby M M, Peterson A F. Accurate computation of mathieu functions[J]. Synthesis lectures on computational electromagnetics, 8, 1-133(2013).

[13] Thumm M, Kasparek W. Passive high-power microwave components[J]. IEEE Trans on Plasma Science, 30, 755-786(2002).

[14] Thumm M. Recent developments on high-power gyrotrons: Introduction to this special issue[J]. Journal of Infrared, Millimeter,and Terahertz Wave, 32, 241-252(2011).