Novel Approach for Center Frequency and Bandwidth Tuning in Multimode Resonator Based Microstrip Dual-Mode Bandpass Filter
Keywords:
Multi-mode reson, Ultra-wideband, Transmission ZerosAbstract
In this paper, a novel approach for both center frequency and bandwidth tuning in a dual mode bandpass filter is demonstrated. The proposed filter is configured from a half wavelength multimode resonator structure. The Ultra-wide bandpass response of the multimode resonator is extracted using an inter-digital feed structure which provides good input/output coupling. By deploying stepped admittance structure perturbation element into the symmetrical plane of the multimode resonator, the dual-mode response is achieved with three upper stopband transmission zeros (TZs). The coupling between two degenerative mode frequencies is controlled by the admittance ratio (Y) of the stepped admittance structure. Changing admittance ratio (Y) of stepped admittance structure, resulted in the change in even mode resonance frequency and location of three upper stopband transmission zeros while keeping odd mode frequency fixed. The proposed filter has a size of 14.0 x 30.0 mm2.
Metrics
References
Hongshu Lu, Tao Xie, Jingjian Huang, Naichang Yuan, Qian Li, Design of compact dual-mode bandpass filter based on a new fractal resonator, Proc. IEEE International Symposium on Microwave, Antenna, Propagation, and EMC Technologies (MAPE) 2017.
Arjun Kumar and M.V. Kartikeyan, Design studies of ultra wideband microstrip bandpass filter with T-shaped defected ground structure controlled by inter-digital capacitance, IEEE conference on Applied Electromagnetics (AEMC) 2011.
Ran Liu, Li Zhi Li, and Wen Shi, Compact microstrip triple-mode filter based on stepped-impedance resonators, IEEE International Conference on Electronic Packaging Technology (ICEPT) 2014.
J.-T. Kuo and E. Shih, Microstrip stepped impedance resonator bandpass filter with an extended optimal rejection bandwidth, IEEE Transactions on Microwave Theory and Techniques 2003.
T. Y. Xiang, T. Lei, and M. Peng, Miniature dual-mode bandpass filter based on meander loop resonator with source-load coupling, Asia-Pacific Microwave Conference (APMC) 2015.
Sugchai Tantiviwat, Mohammad Shahrazel Razalli, and Siti Zuraidah Ibrahim, Miniature microstrip bandpass filters based on quadruple-mode resonators with less via IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM) 2017.
C. Hua, C. Chen, C. Miao, and W. Wu, Microstrip bandpass filters using dual-mode resonators with internal coupled lines, Progress In Electromagnetics Research C, vol. 21, pp. 99–111, 2011.
Bian Wu, Xin Lai, Jia Chen, Xue-Feng Li, and Chang-Hong Liang, Dual-mode filter with asymmetric response using square loop resonator DGS, IEEE Proceedings, ICMMT2010, 2010.
K.G.Avinash and I.Srinivasa Rao, Design of microstrip meandered dual mode wideband bandpass filter using quarter wavelength stub, IEEE International Conference on Advances in Computing and Communications (ICACC) 2015.
C. Karpuz, P. Ö. Özdemir, and G. B. Fırat, Design of fourth order dual-mode microstrip filter by using interdigital capacitive loading element with high selectivity, IEEE European Microwave Conference (EuMC) 2016.
D. Sen and D. Packiaraj, Design of drop in type band pass filter with extended stop, Proc. IEEE Asia-Pacific Microwave Conference (APMC), 2016.
B. Peng, S. Li, B. Zhang, and S. Wang, Compact multimode bandpass filters with wide upper stopband using dual-mode DGS resonators Proc. IEEE Asia-Pacific Microwave Conference (APMC), 2014.
