[1] Vahldieek R,Bornemann J,Arndt F,et al.Optimized waveguide E-plane metal insert filters for millimeter-wave applications[J].IEEE MTT Trans on Microwave Theory and Tech.1983,31(1):65-69.
[6] Matthaei G L,Young L,Jones E M T.Microwave Filters,Impedance-Matching Networks and Coupling Structures[M].New York:McGraw Hill,1964.