參考文獻 |
[1] J. Butler and R. Lowe, ”Beam forming matrix simplifies design of electronically scanned antenna,” IEEE Trans. Appl. Supercond., vol. AC-9,no. 4, pp. 170-173, Apr. 1961.
[2] C. -H. Tseng, C. -J. Chen, and T. -H. Chu, ”A low-cost 60-GHz switched-beam patch antenna array with butler matrix,” IEEE Antennas and Wireless Propagation Lett., vol. 7, pp. 432-435, 2008.
[3] C. -W. Wang, T. -G. Ma, and C. -F. Yang, “A new planar artificial transmission line and its applications to a miniaturized butler matrix,” IEEE Trans. Microw. Theory Tech., vol. 55, no. 12, pp. 2792-2801, Dec. 2007.
[4] C. A. Balanis, Antenna Theory, 3rd ed. New York: Wiley, 2005.
[5] C. Collado, A. Grau, and F. D. Faviis, ”Dual-band planar quadrature hybrid with enhanced bandwidth response,” IEEE Trans. Microw. Theory Tech., vol. 54, no. 1 pp. 180-188, Jan. 2006.
[6] M. J. Park and B. Lee, “Dual-band planar quadrature hybrid with enhanced bandwidth response,” IEEE Microw. Wireless Compon. Lett., vol. 15, no.10, pp.655-657, Oct. 2005.
[7] F. -L. Wong and K. -K. M. Cheng, ”A novel planar branch-line coupler design for dual-band applications,” IEEE MTT-S Int. Microwave Symp., vol. 2. Jun. 2004, pp. 903-906.
[8] C. -W. Tang, M. -G. Chen, and C. -H. Tsai, ” Design of multipassband microstrip branch-line couplers with open stubs,” IEEE Trans. Microw. Theory Tech., vol. 87, no. 1 pp. 196-204, Jan. 2009.
[9] W. -S. Tung, H. -H. Wu, and Y. -C. Chang, “Design of microwave wide-band quadrature hybrid using planar transformer coupling method,” IEEE Trans. Microw. Theory Tech., vol. 51, no. 7, pp. 1852-1856, Jul. 2003.
[10] C. -H. Ho, L. Fan, K. Chang, “Broad-band uniplanar hybrid-ring and branch-line couplers,” IEEE Trans. Microw. Theory Tech., vol. 41, no. 12, pp. 2116-2125, Dec. 1993.
[11] T. Hirota, A. Minakawa, and M. Muracuchi, “Reduced-size branch-line and rat-race hybrids for uniplanar MMIC’s,” IEEE Trans. Microw. Theory Tech., vol. 38, no. 3, pp. 270-275, Mar. 1990.
[12] I. Sakagami, M. Haga, and T. Munehiro, ”Reduced branch-line coupler using eight two-step stubs,” IEE Proc.-Microw. Antennas Propag., vol. 146, no. 6, pp. 455-460, Dec. 1999.
[13] C. -W. Tang, M. -G. Chen, and C. -H. Tsai, ” Miniaturization of microstrip branch-line coupler with dual transmission lines,” IEEE Microw. Wireless Compon. Lett., vol. 18, no.3, pp.185-187, Mar. 2008.
[14] C. -W. Tang and M. -G. Chen, ” Synthesizing microstrip branch-line couplers with predetermined compact size and bandwidth,” IEEE Trans. Microw. Theory Tech., vol. 55, no. 9, pp. 1926-1934, Sep. 2007.
[15] C. -S. Kim, J. -S. Lim, J. -S. Park, D. Ahn, and S. Nam, “A 10 dB branch line coupler using defected ground structure,” in European Microw. Conference, 2000.
[16] C. -W. Tang, M. -G. Chen, Y. S. Lin, and J. -W. Wu, “Broadband microstrip branch-line coupler with defected ground structure,” IEE Electron. Lett., vol. 24, no. 25, pp. 1458-1460, Dec. 2006.
[17] C. You and X. Zhu,” A novel planar dual-band branch line coupler using defect ground structure,” IEEE MTT-S Int. Microwave Symp. Dig., Jun. 2008, pp. 1227-1230.
[18] Z. Liu and R. M. Weikle, “A compact quadrature coupler based on coupled artificial transmission lines,” IEEE Microw. Wireless Compon. Lett., vol. 55, no. 9, pp. 1926-1934, Sep. 2007.
[19] C. -W. Wang, T. -G. Ma, and C. -F. Yang, “Miniaturized branch-line coupler with harmonic suppression for RFID applications using artificial transmission lines,” IEEE MTT-S Int. Microwave Symp. Dig., Jun. 2007, pp. 29-32.
[20] A. F. Sheta, A. Mohra and S. F. Mahmoud, ”A new class of miniature quadrature couplers for MIC and MMIC applications” Microwave & Optical Technology Letters, vol. 34, no. 3, pp.215-219, Aug. 2002.
[21] W. -L. Chen and G. -M. Wang, “Design of novel miniaturized fractal-shaped branch-line couplers,” Microwave & Optical Technology Letters, vol. 50, no. 5, pp.1098-1104, May 2008.
[22] M. Nosrati and M. S. Valashani, “A novel compact branch-line coupler using four coupled transmission lines, ”Microwave & Optical Technology Letters, vol. 50, no. 6, pp.1712-1714, Jun. 2007.
[23] H. -H. Hsieh, Y. -T. Liao and L. -H. Lu,” A compact quadrature hybrid MMIC using CMOS active inductors,” IEEE Trans. Microw. Theory Tech., vol. 55, no. 6, pp. 1098-1104, Jun. 2007.
[24] T. N. Kuo, Y. -S. Lin, C. -H. Wang, C. H. Chen, “A compact LTCC branch-line coupler using modified-T equivalent-circuit model for transmission line,” IEEE Microw. Wireless Compon. Lett., vol. 16, no. 2, pp. 90-92, Feb. 2006.
[25] D. M. Pozar, Microwave Engineering, 3rd ed. New York: Wiley, 2005.
[26] N. N. Rao, Elements of Engineering Electromagnetics,6th ed. New Jersey:Pearson,2004.
[27] J. Reed and G. J. Wheeler, “A method of analysis of symmetrical four-port networks,” IEEE Trans. Microw. Theory Tech., vol. 15, no. 12 pp. 889-891, Dec. 2005.
[28] IE3D. ver. 10.2, Zeland Software Inc., Fremont, CA, 2004.
[29]R. F. Harrington, Field Computation by Moment Methods,1st ed. New York:Macmillan,1968.
[30]W. -H. Tu and K. Chang, “Compact second harmonic-suppressed bandstop and bandpass filters using open stubs,” IEEE Trans. Microw. Theory Tech., vol. 54, no. 6, pp. 2497-2502, Jun. 2006.
|