本論文第一個主題為反射型寬頻共模抑制濾波器，此濾波器架構應用於多層印刷電路板，在蜿蜒差動傳輸線下方置入一E型諧振器，透過蜿蜒差動對與E型諧振器之間相互作用達到雙模態激發，並適當設計傳輸零點的位置，使其達到寬頻共模抑制的特性。在頻域上，此濾波器於 2 GHz 至 10.5 GHz 共模皆抑制於10 dB以上，高達136%比例頻寬，濾波器的電氣尺寸為0.22λg × 0.3λg，λg為其抑制頻帶中心頻率6GHz波長，並且於抑制頻率範圍內差模訊號皆保持良好的完整性。
第二個主題是將反射型寬頻共模抑制濾波器延伸為雙頻吸收式共模抑制濾波器，論文採用雙頻步階阻抗相位匹配、串聯式吸收端相關技術，並根據通訊協定802.11b 與 802.11ac 針對2.4 GHz ~ 2.5 GHz與5.17 GHz ~ 5.33 GHz雙頻段進行共模雜訊吸收。從頻域上，此濾波器差模穿透從 DC至12 GHz的皆小於 - 3 dB。共模抑制範圍從 2.1 GHz 至 10.7 GHz 皆抑制於15 dB以上，並且在2.4 GHz ~ 2.5 GHz與5.17 GHz ~ 5.33 GHz吸收效率分別為 94% ~ 77% 與 95% ~ 92%。
綜合上述，此篇論文提出之濾波器具有體積小、架構簡易與寬頻共模雜訊抑制等優點，且提出針對雙頻段進行共模雜訊吸收的技術，並有良好的差動訊號完整性。在實務上具有其應用價值。

The first topic of this thesis is a reflective common mode suppression filter. This filter structure is fabricated on a multilayer printed circuit board. An E-type resonator is placed under the differential transmission line. Through the differential pair and resonator achieves bimodal excitation in common mode, and the position of the transmission zero is appropriately designed to achieve the characteristic of broadband common mode suppression. In frequency domain, this filter is suppressed more than 10 dB in the common mode from 2 GHz to 10.5 GHz, up to 136% fractional bandwidth, the electrical size of the filter is 0.22λg × 0.3λg, and λg is the center frequency of the suppression band. And the differential mode signal maintains good integrity from DC to 12GHz.
The second topic is to extend the reflective-type common mode suppression filter to a dual-frequency absorptive-type common mode suppression filter by using step-impedance phase matching and series absorber techniques. For the frequency domain, the insertion loss is less than 3 dB from DC to 12 GHz. The common mode is suppressed more than 15 dB from 2.1 GHz to 10.7 GHz, and the absorption efficiencies are 94% ~ 77% and 95% ~ 92% at 2.4 GHz ~ 2.5 GHz and 5.17 GHz ~ 5.33 GHz, respectively.
In summary, the filter proposed in this thesis has the advantages of small size, simple structure and wideband common-mode noise suppression. We propose a common-mode noise absorption technique for dual-band, and have good differential signal integrity. It has its application value in practice.

[1] Z. Chen, G. Katopis, "A Comparison of Performance Potentials of Single Ended vs. Differential Signaling", Proc. of IEEE EPEP, pp. 185-188, Oct. 2004.
[2] D. G. Kam, H. Lee, J. Kim, J. Kim, "A new twisted differential line structure on high-speed printed circuit boards to enhance immunity to crosstalk and external noise", IEEE Microw. Wireless Compon. Lett., vol. 13, no. 9, pp. 411-413, Sep. 2003.
[3] E. Bogatin, Signal Integrity – Simplified, N.J.: Pretice Hall, 2004.
[4] http://en.wikipedia.org/wiki/Differential_signaling
[5] P. Fornberg, M. Kanda, C. Lasek, M. Piket-May, S. Hall, "The impact of a nonideal return path on differential signal integrity", IEEE Trans. Electromag. Compat., vol. 44, pp. 11-15, Feb. 2002.
[6] N. Orhanovic, R. Raghuram, N. Matsui, "Signal propagation and radiation of single and differential microstrip traces over split image planes", Proc. IEEE Int. Symp. Electromagn. Compat., pp. 339-343, 2000.
[7] B. Archambeault, S. Connor, J. Diepenbrock, "EMI emissions from mismatch in high-speed differential signal trace and cables", Proc. IEEE Int. Electromagn. Compat. Symp., pp. 1-6, 2007-Jul.
[8] C. R. Paul, Introduction to Electromagnetic Compatibility, New York: Wiley, 1992.
[9] M. Damnjanovic, L. Zivanov, G. Stojanovic, "Common mode chokes for EMI Suppression in Telecommunication Systems", Proc. Int. Conf. Comput. Tool, pp. 905-909, 2007-Sep.-912.
[10] G. Shiue, W. Guo, C. Lin, R. Wu, "Noise reduction using compensation capacitance for bend discontinuities of differential transmission lines", IEEE Trans. Adv. Packag., vol. 29, no. 3, pp. 560-569, Aug. 2006.
[11] C. H. Chang, R. Y. Fang, C. L. Wang, "Bended differential transmission line using compensation inductance for common-mode noise suppression", IEEE Trans. Compon. Packag. Manuf. Technol., vol. 2, no. 9, pp. 1518-1525, Sep. 2012.
[12] B.-R. Huang, C.-H. Chang, R.-Y. Fang, C.-L. Wang, "Common-mode noise reduction using asymmetric coupled line with SMD capacitor", IEEE Trans. Compon. Packag. Manuf. Technol., vol. 4, no. 6, pp. 1082-1089, Jun. 2014.
[13] G. Shiue, W. Guo, C. Lin, R. Wu, "Noise reduction using compensation capacitance for bend discontinuities of differential transmission lines", IEEE Trans. Adv. Packag., vol. 29, no. 3, pp. 560-569, Aug. 2006.
[14] W.-T. Liu, C.-H. Tsai, T.-W. Han, T.-L. Wu, "An embedded common-mode suppression filter for GHz differential signals using periodic defected ground plane", IEEE Microw. Wireless Compon. Lett., vol. 18, no. 4, pp. 248-250, Apr. 2008.
[15] F. de Paulis, L. Raimondo, S. Connor, B. Archambeault, A. Orlandi, "Compact configuration for common mode filter design based on planar electromagnetic bandgap structures", IEEE Trans. Electromagn. Compat., vol. 54, no. 3, pp. 646-654, Jun. 2012.
[16] S. J. Wu, C. H Tsai, T. L. Wu, T. Itoh, "A novel wideband common-mode suppression filter for GHz differential signals using coupled patterned ground structure", IEEE Trans. Microw. Theory Tech., vol. 57, no. 4, pp. 848-855, Apr. 2009.
[17] C.-Y. Hsiao, C.-H. Tsai, C.-N. Chiu, T.-L. Wu, "Radiation suppression for cable-attached packages utilizing a compact embedded common- mode filter", IEEE Trans. Compon. Packag. Manuf. Technol., vol. 2, no. 10, pp. 1696-1703, Oct. 2012.
[18] G.-H. Shiue, C.-M. Hsu, C.-L. Yeh, C.-F. Hsu, "A comprehensive investigation of a common-mode filter for gigahertz differential signals using quarter-wavelength resonators", IEEE Trans. Compon. Packag. Manuf. Technol., vol. 4, no. 1, pp. 134-144, Jan. 2014.
[19] J. Naqui, A. Fernandez-Prieto, M. Duron-Sindreu, J. Selga, F. Medina, F. Mesa, F. Marton, "Common-mode suppression in microstrip differential lines by means of complementary split ring resonators: Theory and applications", IEEE Trans. Microw. Theory Tech., vol. 60, no. 10, pp. 3023-3034, Oct. 2012.
[20] Chein-Hua Hung, Chih-Ying Hsiao, and Tzong-Lin Wu, “A novel common-mode filter (CMF) design based on signal interference technique,” IEEE Electrical Design of Advanced Packaging & Systems Symposium (2014), pp. 125-128
[21] T.-W. Weng, C.-H. Tsai, C.-H. Chen, D.-H. Han, T.-L. Wu, "Synthesis model and design of a common-mode bandstop filter (CM-BSF) with an all-pass characteristic for high-speed differential signals", IEEE Trans. Microw. Theory Techn., vol. 62, no. 8, pp. 1647-1656, Aug. 2014.
[22] P.-J. Li, C.-H. Cheng, Y.-C. Tseng, T.-L. Wu, "Novel absorptive design of common-mode filter at desired frequency band", Proc. IEEE 20th Workshop Signal Power Integr., pp. 1-4, May 2016.
[23] P. J. Li, Y. C. Tseng, C. H. Cheng, T. L. Wu, "A novel absorptive common-mode filter for cable radiation reduction", IEEE Trans. Comp. Packag. Manuf. Tech., vol. 7, no. 4, pp. 511-518, April 2017.
[24] C.-F. Chen, T.-M. Shen, T.-Y. Huang, R.-B. Wu, "Design of multimode net-type resonators and their applications to filters and multiplexers", IEEE Trans. Microw. Theory Techn., vol. 59, no. 4, pp. 848-856, Apr. 2011.
[25] A.-S. Liu, T.-Y. Huang, R.-B. Wu, "A dual wideband filter design using frequency mapping and stepped-impedance resonators", IEEE Trans. Microw. Theory Tech., vol. 52, no. 4, pp. 2921-2929, Dec. 2008.
[26] C.-F. Chen, T.-Y. Huang, R.-B. Wu, "Design of dual- and triple-passband filters using alternately cascaded multiband resonators", IEEE Trans. Microw. Theory Tech., vol. 54, no. 9, pp. 3550-3558, Sep. 2006.
[27] J. Liu, X. Y. Zhang, C. L. Yang, "Analysis and design of dual-band rectifier using novel matching network", IEEE Trans. Circuits Syst. II Exp. Briefs.
[28] S. H. Hall, G. W. Hall, and J. A. McCall, High-Speed Digital System Design, A Handbook of Interconnect Theory and Design Practices, Hoboken, NJ: Wiley, 2000.
[29] S. B. Cohn, "Slot line on a dielectric substrate", IEEE Trans. Microwave Theory Tech., vol. MTT-17, pp. 768-778, Oct. 1969.
[30] Yinchao Chen, Shuhui Yang, "Mixed mode S-parameters analysis for differential networks in integrated circuits", Proceedings of 16th IPFA, pp. 1-7, June 2009.
[31] J. S. Hong, and M. J. Lancaster, Microstrip Filters for RF/Microwave Application, John Wiley & Sons, Inc., 2001.