1. T.Yoneyama and S.Nishida, ?Nonradiative dielectric waveguide for millimeter-wave integrated circuits?, IEEE, Vol. MTT-29 pp. 1188?1192, No.11, 1981
2. W.X.Zhang, L.Zhu and L.L.Xiao, ?Research progress in groove NRD waveguides? (in Chinese) Proc. of 5th National Conference on MMW & Sub-MMW (May, 1991, QuingDao, China_ pp. 275?278
3. E.A.J.Marcatili, ?Bends in optical dielectric guides?, B.S.T.J 48, pp. 2291?2298 9, 1969
4. K.Matsumura et al, ?A calculation method for phase constant of guided mode on curved rectangular dielectric waveguide?, IEICE, Vol. E70, pp. 899?901, No.10, 1987
5. T.N.Trinh and R.Mattra. Field profile in a single-mode curved dielectric waveguide of rectangular cross section?, IEEE, Vol. MTT-29, pp. 1315?1318, No. 12, 1981