A new super compact ultra-wideband (UWB) bandpass filter (BPF) with triple-notched bands is presented in this paper. Firstly, a new square ring quad-mode resonator (SRQMR) is employed to obtain the initial UWB BPF. Then, a triple-mode stepped impedance resonator (SIR) is inserted into the initial UWB BPF to achieve three desired notched bands. The proposed triple-mode SIR is found to have the advantages of introducing triple-notched bands and provide a higher degree of freedom to adjust the resonant frequencies. To validate the design concept, a new super compact UWB BPF with triple-notched bands respectively centered at frequencies of 3.7 GHz, 5.2 GHz and 7.8 GHz is designed and measured. The predicted results are compared with measured data, and good agreement is reported.
2. Zhu, L., S. Sun, and W. Menzel, "Ultra-wideband (UWB) bandpass filters using multiple-mode resonator," IEEE Microw. Wireless Compon. Lett., Vol. 15, No. 11, 796-798, 2005.
doi:10.1109/LMWC.2005.859011
3. Qiang, L., Y.-J. Zhao, Q. Sun, W. Zhao, and B. Liu, "A compact UWB HMSIW bandpass filter based on complementary split-ring resonators," Progress In Electromagnetics Research, Vol. 11, 237-243, 2009.
doi:10.2528/PIERC09112102
4. Packiaraj, D., K. J. Vinoy, and A. T. Kalghatgi, "Analysis and design of two layered ultra wide band filter," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 8-9, 1235-1243, 2009.
5. Wang, H., L. Zhu, and W. Menzel, "Ultra-wideband bandpass filter with hybrid microstrip/CPW structure," IEEE Microw. Wireless Compon. Lett., Vol. 15, No. 2, 844-846, 2005.
doi:10.1109/LMWC.2005.860016
6. Comez-Garcia, R. and J. I. Alonso, "Systematic method for the exact synthesis of ultra-wideband filtering responses using high-pass and low-pass sections," IEEE Trans. Microw. Theory Tech., Vol. 54, No. 10, 3751-3764, 2006.
doi:10.1109/TMTT.2006.882883
7. Pirani, S., J. Nournia, and C. Ghobadi, "Band-notched UWB BPF design using parasitic coupled line," IEEE Microw. Wireless Compon. Lett., Vol. 20, No. 8, 444-446, 2010.
doi:10.1109/LMWC.2010.2049830
8. Wong, S. W. and L. Zhu, "Implementation of compact UWB bandpass filter with a notch-band," IEEE Microw. Wireless Compon. Lett., Vol. 18, No. 1, 10-12, 2008.
doi:10.1109/LMWC.2007.911972
9. Hao, Z.-C. and J.-S. Hong, "Compact UWB filter with double notch-bands using multilayer LCP technology," IEEE Microw. Wireless Compon. Lett., Vol. 19, No. 8, 500-502, 2009.
doi:10.1109/LMWC.2009.2024828
10. Hsiao, P.-Y. and R.-M. Weng, "Compact tri-layer ultra-wideband bandpass filter with dual notch bands," Progress In Electromagnetics Research, Vol. 106, 49-60, 2010.
doi:10.2528/PIER10040204
11. Wei, F., Q. Y. Wu, X. W. Shi, and L. Chen, "Compact UWB BPF with triple-notched bands based on stub loaded resonator," IET Electron. Lett., Vol. 49, No. 2, 124-126, 2013.
doi:10.1049/el.2012.2885
12. Zhao, J.-D., J.-P. Wang, and J.-L. Li, "Compact UWB bandpass filter with triple notched bands using parallel U-shaped defected microstrip structure," IET Electron. Lett., Vol. 50, No. 2, 89-91, 2014.
doi:10.1049/el.2013.3077
13. Zhao, J.-D., J.-P. Wang, and J.-L. Li, "Compact microstrip UWB bandpass filter with dual notched bands using E-shaped resonator," IEEE Microw. Wireless Compon. Lett., Vol. 23, No. 12, 638-640, 2013.
doi:10.1109/LMWC.2013.2283873
14. NSYS Corp. ANSYS/ANSOFT, 2012, High Frequency Structure Simulator (HFSS), Ver. 13.0., [Online], available: http://www.ansoft.com.
Submit
