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Design of UWB Bandpass Filter Using Triangular ring MMR With Stub – Loaded Resonator

Design of UWB Bandpass Filter Using Triangular ring MMR With Stub – Loaded Resonator. Yung-Wei Chen Department of Computer and Communication, Kun Shan University, Taiwan. Outline. Motivation Design procedure of the filter Results Conclusion. Motivation.

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Design of UWB Bandpass Filter Using Triangular ring MMR With Stub – Loaded Resonator

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  1. Design of UWB Bandpass Filter Using Triangular ring MMR With Stub – Loaded Resonator Yung-Wei Chen Department of Computer and Communication, Kun Shan University, Taiwan

  2. Outline • Motivation • Design procedure of the filter • Results • Conclusion

  3. Motivation In the U.S. Federal Communications Commission (FCC) -defined UWB in-door specification (3.1 – 10.6 GHz) IEEE 802.11a

  4. Motivation – Paper review (1) • L. Zhu et al. proposed the UWB filter used a multiple-mode resonator (MMR) with tight coupling I/O lines to generate a wideband response. • S. W. Wong et al. proposed the ultra-wideband bandpass filters using short-/open-stubs embedded ring resonator. The square ring resonator is first excited by two interdigital coupled-lines at two sides to achieve a triple-mode ultra-wideband bandpass filter performance L. Zhu, S. Sun, and W. Menzel, “Ultra-wideband (UWB) bandpass filters using multiple-mode resonator,” IEEE Microw. Wireless Compon. Lett., vol. 15, no. 11, pp. 796–798, Nov. 2005. S. W. Wong, L. Zhu, L. C. Quek and Z. N. Chen, “A stopband-enhanced UWB bandpass filter using shout-/open- stubs embedded ring resonator,” in Proc. IEEE Asia-Pacific Microw. Conf., Dec. 2009, pp. 913-916.

  5. Motivation – Paper review (2) Q. X. Chu et al. proposed Novel compact ultra-wideband (UWB) bandpass filter (BPF) using stub-loaded multiple-mode resonator (MMR) is presented in this letter. Q. X. Chu, X. H. Wu and X. k. Tain, “Novel UWB Bandpass Filter Using Stub-Loaded Multiple-Mode Resonator,”IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS., vol. 21, NO.8, Aug 2011.

  6. Motivation – UWB bandpass filter using Triangular ring MMR There are two directions of this study : 1. To design UWB filter using Triangular ring MMR with coupling lines; 2. Triangular ring MMR add to the SLR composed of two transmission zeros Uppertransmission zero Lowertransmission zero Duroid 6010 substrate with a relative dielectric constant of 10.2, a loss tangent of 0.0023 and a thickness of 1.27 mm is used for the simulation and practical fabrication.

  7. Change of transmission zeros (1) Change θ of SLR (a) (b) (c) (d) The fig shows (a) (b) change θ4 + θ6 to watch S21 and Y21 of the lower transmission zeros (c) (d) change θ5 to watch S21and Y21 of the upper transmission zeros

  8. Change of transmission zeros (2) Change impedance of SLR (a) (b) (c) (d) The fig shows (a) (b) change Z1 to watch S21 and Y21 of the lower transmission zeros (c) (d) change Z2 to watch S21and Y21 of the upper transmission zeros

  9. Measured results of the filter The measured results of the filter have a 3 dB FBW of 117% The SLR(stub-loaded resonator) is designed with two transmission zeros at 2.8 and 11GHz

  10. Comparisons with other proposed UWB filters P-K. Singh, S. Basu, and Y-H. Wang, “Planar Ultra-Wideband Bandpass Filter Using Edge Coupled Microstrip Lines and Stepped Impedance Open Stub,” IEEE Microw. Wireless Compon. Lett., vol. 17, no. 9, pp. 649–651, Sep. 2007. C-P. Chen, Z. Ma, N. Nagaoka, and T. Anada, “Novel Compact Ultra-Wideband Bandpass Filter Employing Short-circuited Stubs with Coupled Stepped-Impedance Resonator,” Proceedings of Asia-Pacific Microwave Conference 2007., R. Ghatak, P. Sarkar, R.k. Mishra, and D.R. Poddaer “A Compact UWB Bandpass Filter With Embedded SIR as Band Notch Structure,”I EEE Microw. Wireless Compon. Lett., vol. 21, no. 5, pp. 261–263, MAY. 2011

  11. Thanks for your attention !!

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