Reconfigurable Balanced Dualband Bandstop Filter
Keywords:Branchline structure, CM noise, CMRR, nonresonating node (NRN), tunable
This paper introduces a novel architecture of reconfigurable balanced (differential) dualband bandstop filter (BSF). In differential mode (DM), each symmetrical bisection of the filter incorporates in-series cascade of two tunable dualband bandstop sections whereas high CMRR is achieved by loading open stubs to the symmetry plane of the branch line structure. To validate the proposed topology, a microstrip prototype is designed and fabricated. Both simulation and measured results show a good agreement with each other.
M. F. Hagag, M. Abdelfattah, and D. Peroulis, "Balanced OctaveTunable Absorptive Bandstop Filter," 2018 IEEE 19th Wireless and Microwave Technology Conference (WAMICON), Sand Key, FL, 2018, pp. 1-4.
D. Borah and T. S. Kalkur, "A Planar Multiband Balanced Bandstop Filter," 2018 IEEE MTT-S Latin America Microwave Conference (LAMC 2018), Arequipa, Peru, 2018, pp. 1-3.
S. N. Shahrouzi, “Optimized Embedded and Reconfigurable Hardware Architectures and Techniques for Data Mining Applications on Mobile Devices,” Ph.D. Dissertation, University of Colorado Colorado Springs, December 2018.
S. N. Shahrouzi and D. G. Perera, “Dynamic partial reconfigurable hardware architecture for principal component analysis on mobile and embedded devices,” EURASIP Journal on Embedded Systems, Springer Open, vol. 2017, article no. 25, Feb. 2017.
D. Borah and T. S. Kalkur, "A Balanced Dual-band Tunable Bandpass Filter," 2018 International Applied Computational Electromagnetics Society Symposium (ACES), Denver, CO, 2018, pp. 1-2.
D. Psychogiou, R. Gomez-Garcia, and D. Peroulis, “A class of fullyreconfigurable planar multi-band bandstop filters,” 2016 IEEE MTTS International Microwave Symposium (IMS), 2016.
J. Cai, Y. J. Yang, W. Qin, and J. X. Chen, "Wideband Tunable Differential Bandstop Filter Based on Double-Sided Parallel-Strip Line," in IEEE Transactions on Components, Packaging and Manufacturing Technology.
M. Kong, Y. Wu, Z. Zhuang, and Y. Liu, "Narrowband balanced absorptive bandstop filter integrated with wideband bandpass response," in Electronics Letters, vol. 54, no. 4, pp. 225-227, February 22 2018.
J. Sorocki, I. Piekarz, S. Gruszczynski, and K. Wincza, "Low-Loss Directional Filters Based on Differential Band-Reject Filters With Improved Isolation Using Phase Inverter," in IEEE Microwave and Wireless Components Letters, vol. 28, no. 4, pp. 314-316, April 2018.
M. Sagawa, M. Makimoto, and S. Yamashita, "Geometrical structures and fundamental characteristics of microwave stepped-impedance resonators," IEEE Transactions on Microwave Theory and Techniques, vol. 45, no. 7, pp. 1078-1085, July 1997.
M. M. Elsbury, P. D. Dresselhaus, N. F. Bergren, C. J. Burroughs, S. P. Benz, and Z. Popovic, "Broadband Lumped-Element Integrated NWay Power Dividers for Voltage Standards," in IEEE Transactions on Microwave Theory and Techniques, vol. 57, no. 8, pp. 2055-2063, Aug. 2009.