[1] K.H. Badr, H.A. El-Motaafy, E.-S.A. El-Badawy, M.E.-S.A. Bayoumy, “Design and implementation of MW balanced amplifier using branch-line couplers,” Radio Science Conference, NRSC ''96, Thirteenth National, 19-21 March 1996, pp. 385 - 394
[2] A.F. Sheta, “A novel H-shaped patch antenna,” Microwave Opt Technology Lett 29, 2001, pp. 62-65
[3] M. Caulton, B. Hershenov, S.P. Knight, R.E. DeBrecht, “Status of lumped elements in microwave integrated circuits—present and future,” IEEE Trans. Microwave Theory Tech., MTT-19, 1977, pp. 588 - 599
[4] R.K. Gupta, W.J. Getsinger, “Quasi-lumped-element 3- and 4-port networks for MIC and MMIC applications,” IEEE MTT-S Int. Microwave Symposium Digest , 1984, pp. 409 – 411
[5] Pieters, Vaesen, Brebels, S. Mahmoud, De Raedt, Beyne, Mertens, “Accurate modeling of high-Q spiral inductors in thin film multiplayer technology for wireless telecommunication applications,” IEEE Trans Microwave Theory Tech., MTT-49, 2001, pp. 589 - 599
[6] T. Hirota, A. Minakaw, M. Muraguchi, “Reduced-size branch-line and rat-race hybrids for uniplanar MMICs,” IEEE Trans Microwave Theory Tech. MTT-38, 1990, pp. 270 - 275
[7] M. Gillick, I.D. Roberston, J.S. Joshi, “Design and realization of reduced size impedance transforming uniplanar MMIC branch-line coupler,” Electron Lett 28, 1992, pp. 1555 - 1557
[8] R. Baliram Singh , T.M. Weller, “Miniaturized 20 GHz CPW quadrature coupler using capacitive loading,” Microwave Optical Technology Lett 30, 2001, pp. 3 - 5
[9] F.S. Abdel, M. Ashraf, F.M. Samir, “A new class of miniature quadrature couplers for MIC and MMIC applications,” Microwave Optical Technology Lett 34, Aug. 5 2002, pp. 215 - 219
[10] I.-H. Lin, D. Marc, C. Caloz, T. Itoh, “Arbitrary Dual-Band Components Using Composite Right-left Handed Transmission Lines,” IEEE Trans. Microwave Theory Tech., Volume: 52, NO.4, Apr. 2004, pp. 1142 – 1149
[11] I.-H. Lin, C. Caloz and T. Itoh, “A branch-line coupler with two arbitrary operating frequencies using left-handed transmission lines,” IEEE MTT-S Int. Microwave Symposium Digest, 2003, pp. 325 - 328
[12] F.L. Wong and K.K.M. Cheng, “A novel planar branch-line coupler design for dual-band applications,” IEEE MTT-S Int. Microwave Symposium Digest, 2004, pp. 903 - 906
[13] F.L. Wong and K.K.M. Cheng, “A novel approach to the design and implementation of dual-band compact planar 90 deg branch-line coupler” IEEE Trans. Microwave Theory Tech., Volume: 52, NO.11, Nov. 2004, pp. 2458 – 2463
[14] M. Paul, “A novel branch-Line coupler design for millimeter-wave application,” 1990 IEEE MTT-S Digest, pp. 585 - 588
[15] Canan Toker, Mustafa Saglam, Mustafa Ozme and Nilgun Gunalp, “Branch-Line coupler using unequal line lengths,” IEEE Trans. Microwave Theory Tech., Volume: 49, NO.4, Apr. 2001, pp. 718 - 721
[16] J.W. Gipprich, “A new class of Branch-Line directional couplers,” 1993 IEEE MTT-S Digest, pp. 589 - 592
[17] K.W. Eccleston, S.H.M. Ong, “Compact planar microstrip-line branch-line and Rat-Race couplers,” IEEE Trans. Microwave Theory Tech., Volume: 51, Oct. 2003, pp. 2119 – 2125
[18] H. Ghali, T.A. Moselhy, “Miniaturized Fractal Rat-Race, Branch-Line, and Coupled-Line Hybird,” IEEE Trans. Microwave Theory Tech., Volume: 52, NO.11, Nov. 2004, pp. 2513 – 2520
[19] J.S. Lim, C.S. Kim, J.S. Park, D. Ahn, S. Nam, “Design of 10dB 90° branch line coupler using microstrip line with defected ground structure,” Electronics Lett. 12th Oct. 2000, Vol. 36, NO.21, pp. 1784 – 1785
[20] J. Ried and G.J. Wheeler, “A method of analysis of symmetrical four-port networks,” IRE Trans. Microwave Theory Tech., Vol. 4, Oct. 1956, pp. 246 – 252
[21] R. Levy, L.F. Lind, “Synthesis of symmetrical branch-guide directional couplers,” IEEE Trans. Microwave Theory Tech., Vol. 16, Feb. 1968, pp. 80 – 87
[22] M. Muraguchi, T. Yukitake and Y. Naito, “Optimum design of 3-dB branch-line couplers using microstrip lines,” IEEE Trans. Microwave Theory Tech., Vol. 31, Aug. 1983, pp. 674 – 678
[23] M.E. Last, ”Reference plane shift considerations for microstrip branch-line couplers,” IEEE MTT Int. Microwave Symposium Digest, 1988, pp. 576 – 578
[24] I. Toyoda, T. Hirota, and T. Tokumitsu, “Multilayer MMIC branch-line coupler and broad-side coupler,” IEEE MTT Int. Microwave Symposium Digest, 1992, pp. 273 – 276
[25] K. Rambabu, J. Bornemann, “Design of a Miniaturized Stripline – to - Microstrip-Line Coupler,” IEEE MTT Int. 2002
[26] Guillermo Gonzalez, “Microwave Transistor Amplifiers Analysis and Design 2/E,” Prentice-Hall, 1997
[27] 李永勳編譯,David K. Cheng原著,“電磁學”,偉明圖書有限公司,92年8月。
[28] 袁杰編著,“高頻電路分析與設計”,全威圖書有限公司,88年1月。
[29] 郭仁財編譯,David M. Pozar原著,“微波工程”,高立圖書有限公司,91年7月。
[30] 張盛富、戴明鳳著, “無線通信之射頻被動電路設計”,全華科技圖書有限公司,87年11月。
[31] 遲念宗,“新型縮小化枝幹耦合器設計與製作”,碩士論文,逢甲電子所,台中,93年6月。