This article presents a novel rectangular waveguide bandpass filter with multiple TZs using capacitive planar insert technology. A three-symmetrical rectangular shape single split complementary split ring resonators (CSRRs) is designed on a Roger RO4350 dielectric substrate and placed in the transverse plane of a standard WR-90 rectangular waveguide. The distance between these planar inserts is optimized and placed at 9.654 mm to form a wideband tri-pole bandpass filter. To introduce TZs below passband, CSRRs with capacitive effects are introduced into the planar insert. The numerical analysis is carried out using CST Studio Suite. The numerical analysis shows the filter operates at 10.35 GHz with a 3-dB bandwidth of 1.0037 GHz and TZs at 9.42, 9.28 and 8.98GHz.
Dr. Amit Bage received his PhD degree from Indian Institute of Technology (Indian School of Mines), Dhanbad, India in November 2017. From April 2018 to November 2018, he worked at SRM University as an Assistant Professor in the department of Electronics and Communication Engineering. Presently, he is working as an Assistant Professor (Grade-I) in the Department of Electronics and Communication Engineering, National Institute of Technology, Hamirpur, India. In his area of specialization, he is interested in electro-magnetics and his recent research activities have focused on Waveguide/ Microstrip Filter, Microstrip antenna, filtennas, reconfigurable filter/ antennas, THz Sensor. Dr. Bage has authored more than 45 referred Journal and Conference papers. He is potential reviewer of many journals and conferences such as IEEE Microwave and Wireless Component Letters, International Journal of RF and Microwave Computer-Aided Engineering, International Journal of Electronics, Progress in Electromagnetics Research etc. Dr. Bage is associate member of IETE.