1S.B.Cohn.Properties of ridge waveguide[J].Proc.IRE,l 947,35(8):783-788.
2S.Hopfer.Thedesign of ridged waveguides[J].IRE Trans. Mi-crowave Theory Tech, 1955,5(5):20-29.
3C.Rauscher,and S.W. Kirchoefer,^Miniature ridge—waveguidefilter module employing moldable dielectric material,” Mi-crowave Theory and Techniques, IEEE Transactions, Vol. 54, Is-sue 3, pp.1190 - 1 196, Mar. 2006.
4M.M.Fahmi, J. A. Ruiz-Cruz, R. R. Mansour, et al. Compactridge waveguide filters with arbitrarily placed transmissionzeros using nonresonating modest J]. IEEE Trans. Microwave TheoryTech., 2009, 57(12): 3354-3361.
5X.Luo, J. G. Ma, K. Ma, et al. Compact UWB bandpass filterwith ultra narrow notched band[J]. IEEE Microw. Wireless Compon.Lett., 2010, 20(3): 145-147.
6C.H. Kim, K. C. Ultra-Wideband (UWB) ring resonator bandpassfilter with a notched band[J]. IEEE Microw. Wireless Compon.Lett., 2011, 21(4): 206-209.
7X.Luo, H. Qian, J. G. Ma, et al. A compact UWB bandpass filterwith ultra narrow notched band and competitive attenuationslope[J]. IEEE MTT-S Int. Microw. Symp. 2010, 221 - 224.
8X.L, J. G. Ma, K. S. Yeo, et al. Compact ultra-wideband (UWB)bandpass filter with ultra-narrow dual- and quad—notched bands[Jl.IEEE Trans. Microw. Theory Tech., 2011, 59(6): 1509—1519.
