[3] LI Hong-Fu, Thumm M. Mode conversion due to curvature in corrugated wareguides[J]. International Journal of Electronics, 1991, 712(2): 333-347
[5] NIU Xin-Jian, LI Hong-Fu. Analysis of 8mm high power TE01-TM11 mode converter in overmoded waveguide. 2002 3rd ICMMT Proceedings[M]. Beijing: IEEE Press, 2002: 721-724
[6] Thumm M. High-power millimeter wave mode converter in over-moded circular waveguides using periodic wall perturbations[J]. International Journal of Electronics, 1984, 57(6): 1225-1246