結論

能和通訊系統， 採用氧化鋁陶瓷基板為了減少圖案大小，最後實驗結 果雙工器具有良好的實模擬和測量結果。

本論文是強調以簡易型與殘段型雙工器做到頻率可調。以半波長 共振器為基礎，而為了加強雙工器的損失，在兩條輸出傳輸線上，加 入 1/4λ 開路帶拒殘段，以增加止帶損失，在兩個開路環形共振器中，

以步階阻抗共振器結構進行改良，將其二倍頻諧波，移往更高的頻段，

以增加兩路徑之訊號隔離度，在最後會造成實作與模擬些微的不同，

還有未考慮 SMA 接頭的損耗，未考慮導體的電阻特性(Conductor Loss) 及 SMA 接頭與饋入線之間的匹配不良所致等等原因，而要改善的方法 來提高製做的精密度，應可改善插入損耗和返回損耗。

本論文所設計之雙工器殘段型與雙工器殘段變化型，設計出來之 結果，雙工器殘段型之返回損失的比較上5.2GHz返回損失為-29dB，S₃₂ 插入損失大部分都在-40dB，3.5GHz實驗值之返回損失為-10Db；而雙 工器殘段變化型之3.5GHz實驗數據之返回損失-19dB，5.2GHz返回損失 -25dB，插入損失(S31)大部分都在-40dB，所以本研究所製作之簡易型雙 工器已達成本研究之期望。

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參考文獻

[1] J. S. Hong and M. J. Lancaster, “Cross-coupled microstrip hairpinresonator filters,” IEEE Trans. Microwave Theory Tech., vol. 46, pp.

118-122, Jan. (1998).

[2]J. T. Kuo, M. J. Maa, and P. H. Lu, “A microstrip elliptic function filter with compact miniaturized hairpin resonators,” IEEE Trans. Microwave Guided Wave Lett., vol. 10. pp. 94-95, Sept. (2000).

[3] J. S. Hong and M. J. Lancaster, “Design of highly selective microstrip bandpass filters with a single pair of attenuation poles at finite frequencies,”

IEEE Trans. Microwave Theory Tech., vol. 48, pp.1098-1107, July (2000).

[4] J. S. Hong and M. J. Lancaster, “Couplings of microstrip square openloop resonators for cross-coupled planar microwave filters,” IEEE Trans. Microwave Theory Tech., MTT-44, pp. 2099-2109, Nov. (1996).

[5] S. Y. Lee and C. M. Tsai, “New cross-coupled filter design using improved hairpin resonators,” IEEE Trans. Microwave Theory Tech.,vol.48, pp. 2482-2490, Dec. (2000).

[6] K. S. Yeo and M.J. Lancaster, “The design of microstrip six-pole quasi-elliptic filter with linear phase response using extracted-pole technique,” IEEE Trans. Microwave Theory Tech., vol.49, pp. 321-327, Feb. (2001).

[7] J. S. Hong and M. J. Lancaster, “Theory and experiment of novel microstrip slow-wave open-loop resonator filters,” IEEE Trans.Microwave Theory Tech., vol. 45, pp. 2358-2365, Dec. (1997).

[8] C. C. Chen, Y. R. Chen, and C. Y. Chang, “Miniaturized microstrip cross-coupled filters using quarter-wave or quasi-quarter-wave resonators,”

75

IEEE Trans. Microwave Theory Tech., vol. 51, pp. 120-131, Jan. (2003).

[9] S. K. Goudos and Z. D. Zaharis, “Application of a differential evolution algorithm with strategy adaptation to the design of multi-band microwave filters for wireless communications” Progress In Electromagnetics Research,Vol.109, pp.123-137, (2010).

[10] C.Y. Chen and C.Y. Hsu,“A Simple and Effective Method for Microstrip Dual-Band Filters Design” IEEE Microwave and Wireless Components Letters, vol. 16, NO. 5, pp.1. May (2006).

[11] J. S. Hong and M. J. Lancaster, “Couplings of microstrip square open- loopresonators for cross-coupled planar microwave filters,” IEEE Trans.

Microw.Theory Tech., vol. 44, no. 12, pp. 2099–2108, Dec. 1996.

[12] LEVY, R., “Filters with transmission zeros at real or imaginary frequencies”,IEEE Trans. Microw. Theory Tech., MTT-24, pp. 172-191, 1976.

[13] S. Sun and L. Zhu, “Coupling dispersion of parallel-coupled microstrip lines fordual-band filters with controllable fractional pass bandwidths,” in IEEE MTT-S Int. Dig., Jun. 2005.

[14] S. Sun and L. Zhu, “Compact dual-band microstrip bandpass filter without external feeds,” IEEE Microw. Wireless Compon. Lett., vol. 15, no.

10, pp. 644-646, Oct. 2005.

[15] L. C. Tsai and C. W. Hsue, “Dual-band bandpass filters using equal-length coupled-serial-shunted lines and Z-transform technique,”

Microwave Theory and Techniques, Vol. 52, Issue 4, pp. 1111 – 1117, April 2004.

[16] S. F. Chang, Y. H. Jeng, and J. L. Chen, “Dual-band step-impedance

76

bandpass filter for multimode wireless LANs,” Electron. Lett., vol. 40,no. 1, pp. 38–39, 2004.

[17] C. Quendo, E. Rim, and C. Person, “An original topology of dual-band filter with transmission zeros,” IEEE MTT-S International Microwave Symposium Digest, vol. 2, pp. 1093-1096, 2003.

[18] H. Miyake, S. Kitazawa, "A miniaturized monolithic dual band filter using ceramic lamination technique for dual mode portable telephones," in IEEE MU-S International Microwave Symposium Digest, Vol. 2,

pp.789-792, June 1997

[19] H. M. Lee, C. R. Chen, C. C. Tsai and C. M. Tsai, “Dual-band coupling and feed structure for microstrip filter design,” Microwave Symposium Digest, IEEE MTT-S, Vol.3 pp. 1971-1974, 2004.

[20] L. C. Tsai and C. W. Hsue, “Dual-band bandpass filters using equal-length coupled-serial-shunted lines and Z-transform technique,”

Microwave Theory and Techniques, Vol. 52, Issue 4, pp. 1111 – 1117, April 2004.

[21] J. T. Kuo and. H. S. Cheng, “Design of quasi-elliptic function filters with a dual-passband response,” IEEE Microwave and wireless component letters, vol. 14, NO. 10, pp. 472-474, Oct. 2004

[22] C. -M. Tsai, S. -Y. Lee, and C. -C. Tsai, "Performance of a Planar Filter Using a Zero-Degree Feed Structure," IEEE Trans. Microwave Theory and Tech., pp.2362~2367, Oct. 2002.

[23] M. Mastsuo, H. Yabuki, nd M. Makimoto, The design of a halfwavelength resonator a BPF with attenuation poles at desired

frequencies,IEEE MTT-S Int. Microwave Symp Dig, 1181-1184, 2000.

77

[24] K. Wada and I. Awai, Heuristic models of half-wavelength

resonatorbandpass filter with attenuation poles, Electron Lett 35, 401-402, 1999.

[25] Chen Y. Ho, John H. Weidman, “Improved Design of Parallel

Coupled Line Filters with Tapped Input/Output,” Microwave Journal, Oct., pp.127-130, 1983

[26] J. S. Hong and M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, 2000.

[27] K. C. Gupta, R. Garg, I. Bahl and P. Bhartia, Microstrip Lines and Slotlines, second edition, 1996.

[28] T. C. Edwards and M. B. Steer, Foundations of Interconnect and Microstrip Design, third edition, 2000.

[29] D. M. Pozar, Microwave engineering Third edition. Wiley, 2005 [30] R. Ludwig and P. Bretchko, RF Circuit Design Theory and Applications,2000

[31] C. Bowick, RF Circuit Design, 1982

[32] S. F. Chang, J. L. Chen, and S. C. Chang, “New dual-band bandpass filters with step-impedance resonators comb and hairpin structures,” in Proc. Asia Pacific Microwave Conf., 2003, pp. 793–796.

[33] M. Makimoto and S. Yamashita, Bandpass filters using parallel coupled stripline stepped-impedance resonators, IEEE Trans Microwave Theory Tech MTT-28 (1980), 1413–1417.

[34] J. S. Hong and M. J. Lancaster, “Canonical microstrip filter using square open-loop resonators,” Electron. Lett., vol. 31, no. 23, pp.

2020–2022, Nov. 1995.

78

[35] J. Joubert, “Spiral microstrip resonators for narrow-stopband filters,”

IEE Proc.-Microw. Antennas Propag., Vol. 150, No. 6, Dec. 2000.

[36] H. Miyake, S. Kitazawa, T. Ishizaki, T. Yamada, and Y.Nagatomi, “A miniaturized monolithic dual band filter using ceramic lamination

technique for 82 dual mode portable telephones,” IEEE MIT-S International Microwave Symposium Digest, vol.2, pp. 789-792, 1997.