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A New Compact Microstrip Ultra-Wideband (UWB) Bandstop Filter with Good Performance

By Zidong Gao, Peng Wu, and Yang Zhang
Progress In Electromagnetics Research Letters, Vol. 93, 9-12, 2020


A new compact ultra-wideband (UWB) bandstop filter with good performance is proposed. The proposed UWB bandstop filter is composed of two pairs of quarter-wavelength resonators, a high impedance main transmission line, a half-wavelength resonator, and an H-shaped multiple-mode ring resonator. The proposed H-shaped multiple-mode ring resonator is introduced to achieve three transmission poles appearing in the lower and upper passbands thus to improve the characteristics of selectivity. The proposed quarter-wavelength resonators and half-wavelength resonator are used to obtain four transmission poles showing up in stopband thus to improve the in-band suppression characteristics. To validate the design concept, a new compact UWB bandstop filter with high selectivity and good suppression is designed and fabricated. UWB stopband, low insertion losses, and good selectivity are achieved as demonstrated in both simulation and experiment.


Zidong Gao, Peng Wu, and Yang Zhang, "A New Compact Microstrip Ultra-Wideband (UWB) Bandstop Filter with Good Performance," Progress In Electromagnetics Research Letters, Vol. 93, 9-12, 2020.


    1. Wu, L., P. Hu, C. Li, L. Li, and C. Tang, "Anovel compactmicrostripUWBBPFwith quad notched bands using quad-mode stepped impedance resonator," Progress In Electromagnetics Research Letters, Vol. 83, 51-57, 2019.

    2. Hong, J. S. and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, Wiley, New York, 2001.

    3. Gupta, A., M. Chauhan, A. Rajput, and B. Mukherjee, "Wideband bandstop filter using L-shaped and Quad mode resonator for C and X band application," Electromagnetics, Vol. 40, No. 3, 177-185, 2020.

    4. Hang, C. Y., W. R. Deal, T. Qian, and T. Itoh, "High efficiency transmitter front-ends integrated with planar an PBG," Asia-Pacific Microwave Conf. Dig., 888-894, Dec. 2000.

    5. Kim, J.-Y. and H.-Y. Lee, "Wideband and compact bandstop filter structure using double-plane superposition," IEEE Microw. Wireless Compon. Lett., Vol. 13, No. 7, 279-280, 2003.

    6. Munirathinam, S. and A. Balachandran, "Compact wideband band-stop filter using stepped complementary split ring resonators," Analog Integrated Circuits and Signal Processing, 1-5, 2020.

    7. Matthaei, G. L., L. Young, and E. M. T. Jones, Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Artech House, Norwood, MA, 1980.

    8. Fahmy, W. M., A. E. Farahat, K. F. A. Hussein, and A.-E.-H. A. Ammar, "High Q-factor bandstop filter based on CPW resonator broadside-coupled to CPW through-line," Progress In Electromagnetics Research B, Vol. 86, 121-138, 2020.