volume | PIER Journals

Abstract

This paper presents a design of a compact triple-band bandstop filter (BSF) using embedded capacitors. The presented BSF is useful to suppress the signal frequencies 2.2 GHz, 5.53 GHz and 4.15 GHz from the WLAN and UWB band with attenuation level 33.5 dB, 27.6 dB and 24.9 dB, respectively. The quality factors of the three bands are 5.21, 31.92 and 79.0, respectively. The simulated and measured results are presented to validate the concept. Such BSFs could find application in modern communication systems to suppress the potential interference of the unwanted frequencies from the WLAN and UWB band.

1. Uchinda, H., H. Kamino, K. Totani, N. Yoneda, M. Miyazaki, Y. Konishi, S. Makino, J. Hirokawa, and M. Ando, "Dual-band-rejection filter for distortion reduction in RF transmitters," IEEE Trans. Mirow. Theory Tech., Vol. 52, No. 11, 2550-2556, Nov. 2004.
doi:10.1109/TMTT.2004.837161 Google Scholar

2. Chin, K. S., J. H. Yeh, and S. H. Chao, "Compact dual-band bandstop filters using stepped-impedance resonators," IEEE Microw. Wireless Component Lett., Vol. 17, No. 12849-851, Dec. 2007. Google Scholar

3. Chiou, H. K. and C. F. Tai, "Dual-band microstrip bandstop filter using dual-mode loop resonator," Electronic Lett., Vol. 45, No. 10, 507-509, May 2009.
doi:10.1049/el.2009.0235 Google Scholar

4. Verma, A. K., A. Abdel-Rahman, A. Kumar, A. Balalem, and A. Omar, "New compact dual-band bandstop filter," International Journal of Electronics, Vol. 100, No. 4, 497-507, Taylor & Francis, 2013.
doi:10.1080/00207217.2012.713020 Google Scholar

5. Liao, S.-S., S.-Y. Yuan, Y.-L. Wu, and T.-Y. Huang, "Compact microstrip bandstop filter with controllable triple stopband response," PIERS Proceedings, 1377-1380, Kula Lumper, Malaysia, Mar. 27-30, 2012. Google Scholar

6. Xiao, J.-K. and Y.-F. Zhu, "Multiband bandstop filter using inner t-shaped defected microstrip structure (DMS)," International Journal of Electronics and Communication (AEU), Vol. 68, 90-96, 2014.
doi:10.1016/j.aeue.2013.07.002 Google Scholar

7. Chiu, L. and Q. Xue, "A simple microstrip bandstop filter using cross-coupling stubs," International Journal of Microwave Science and Technology, Article ID 473030, 2012. Google Scholar

8. Xiao, J. K. and H. F. Huang, "Square patch resonator banstop filter," 12th IEEE International Conference on Communication Technology (ICCT), 104-107, Nov. 11-14, 2010. Google Scholar

9. Ning, H., J. Wang, Q. Xiong, and L.-F. Mao, "Design of planar dual and triple narrow-band bandstop filters with independently controlled stopbands and improved spurious response," Progress In Electromagnetics Research, Vol. 131, 259-274, 2012.
doi:10.2528/PIER12072109 Google Scholar

10. Xiao, J.-K. and Y.-F. Zhu, "New U-shaped DGS bandstop filters," Progress In Electromagnetics Research C, Vol. 25, 179-191, 2012.
doi:10.2528/PIERC11091805 Google Scholar

11. Jankovic, N., R. Geschke, and V. C. Bengin, "Compact tri-bnad bandpass and bandstop filters based on Hilbert-Fork resonators," IEEE Microwave and Wireless Components Letters, Vol. 23, No. 6, Jun. 2013.
doi:10.1109/LMWC.2013.2258005 Google Scholar

12. Dhakal, R. and N. Y. Kim, "A compact systematic microstrip filter based on a rectangular meandered line stepped impedance resonator with a triple band bandstop response," The Scientific World Journal, Vol. 2013, Article ID 457693, 2013. Google Scholar

13. Sassi, I., L. Talbi, and K. Hettak, "Compact multi-band filter based on multi-ring complementary split ring resonators," Progress In Electromagnetics Research C, Vol. 57, 127-135, 2015.
doi:10.2528/PIERC15041904 Google Scholar

14. Koirala, G. R. and N.-Y. Kim, "Multiband bandstop filter using an i-stub-loaded meandered defected microstrip structure," Radioengineering, Vol. 25, No. 1, Apr. 2016.
doi:10.13164/re.2016.0061 Google Scholar

15. FCC DA 13-1193, May 2013. Google Scholar

16. CST Microwave Studio, 2011. Google Scholar

Dr. Ashwani Kumar

Dr. Anand Kumar Verma

Prof. Qingfeng Zhang