1. Arndt, F., Heckmann, D., Semmerow, H., et al.: Stop band optimized E-plane filters with multiple metal inserts of variable number per coupling element. IEE Proc. 133, 169–174 (1986)
2. Budimir, D.: Optimized e-plane band pass filters with improved stop band performance. IEEE Trans. Microw. Theory Tech. 45, 212–220 (1997)
3. Collin, R.E.: Foundations for Microwave Engineering. McGraw-Hill, New York (1996)
4. Ghajar, A., Ghorbaninejad, H.: Compact microwave impedance matching using patterned conducting planes. Appl. Comput. Electromagn. Soc. J. 30, 540–545 (2015)
5. Ghorbaninejad-Foumani, H., Khalaj-Amirhosseini, M.: Compact spatial band-pass filters using frequency selective surfaces. Prog. Electromagn. Res. C 21, 59–73 (2011)