High Selectivity Microstrip Bandpass Filter Integrate with Ring Resonator Bandstop Filter

M. A. Mutalib, Z. Zakaria, N. A. Shairi


An integrated high selectivity microstrip wideband bandpass filter with ring resonator bandstop filter is presented in this paper. The bandpass filter consists of of 6 th λ⁄4 short circuited stubs and two-sections of open circuited stub at one end of the element. The integration with bandstop filter is realized using ring resonator. The experimental result shows that the bandwidth of the wideband bandpass filter is between 2.9 GHz – 5.8 GHz. The bandstop filter produced high selectivity and attenuation at resonant frequency of 5.05 GHz and Q-factor of 252.2. This type of filter is suitable for applications such as the multi-service and multiband communication system in order to discriminate the undesired signals.


Bandpass Filter (BPF); Notch Response; Ring Resonator; Tunable Filter;

Full Text:



F. Huang, J. Wang, J. Li, and W. Wu, “Compact microstrip wideband bandpass filter with high selectivity”, Electronics Letters, vol. 52, no. 8, pp. 626-628, 2016.

Z. Zakaria, M. A. Mutalib, W. Y. Sam, and M. F. M. Fadzil. “Integrated Suspended Stripline Structure (SSS) with J-shape Defected Stripline Structure (DSS) to Remove Undesired Signals in Wideband Applications.” In Antennas and Propagation (EuCAP), 2015 9 th European Conference on, pp. 1-5, 2015.

B. Mohammadi, A. Valizade, J. Nourinia, and P. Rezaei, “Design of a compact dual-band-notch ultra-wideband bandpass filter based on wave cancellation method”, IET Microwaves, Antennas & Propagation, 2015, vol. 9, no. 1, pp. 1-9, 2015.

Y. Saini, and M. Kumar, “Ultra-wideband Bandpass filter using short circuited stubs”, In International Journal of Engineering Research and Technology, vol. 3, no. 1, pp. 1853-1856, 2014.

C. L. Hsu, F. C. Hsu, and J. T. Kuo, “Microstrip Bandpass Filter For Ultra-Wideband (UWB) Wireless Communications,” in IEEE MTT-S Int. Microw. Symp. Dig., pp. 679–682, Jun. 2005.

S. W. Wong, W. Liao, K. Wang, and Q. X. Chu, “Ultra-wideband (UWB) bandpass filter with three transmission zeros in the notched band”, In Wireless Symposium (IWS), 2013 IEEE International, pp. 1-4, 2013.

D. Li, Y. Zhang, K., Song, Y. Fan, Y. Jiang, & L. Li, Wei, “A Novel Design of UWB Bandpass Filter with Notch Band,” Microwave Symposium (IMS), 2015 IEEE MTT-S International, pp. 1-4, May 2015.

J. Li; J. Xu, T.A. Denidni, and Q. Zeng, “A Novel Ultra-Wideband Bandpass Filter with A Notched Band,” In Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2015 IEEE International Symposium, pp. 141-142, July 2015.

M. A. Mutalib, Z. Zakaria, N. A. Shairi, S.W. Yik, Y. E. Masrukin and M. K. Zahari, “Dual-Band Bandpass Filter using Defected Microstrip Structure (DMS) for WIMAX Applications,” Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, no. 1-5, pp. 111-114, 2017.

X. Zheng, X. Zhang, X. Yang, and T. Jiang, “A novel UWB bandpass filter with dual notched bands using ring resonator,” In Antennas and Propagation (APCAP), 2016 IEEE 5th Asia-Pacific Conference, pp. 19-20, 2016.

J. S. Hong, and Lancaster, M.J, “Microstrip Filters for RF/Microwave Applications” (Wiley, New York, USA), 2011.

F. Benriad, J. Zbitou, A. Benaïssa, H. Bennis, A. Chinig, & A. M. Sanchez, “A Novel Design of a Ring Resonator Low Pass Filter”, International Journal on Communications Antenna and Propagation (IRECAP), vol. 5, no. 5, pp. 307-310, 2015.


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.

ISSN: 2180-1843

eISSN: 2289-8131