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Modified Design of Branch-Line Coupler for Harmonic Suppression  

Kim, Jong-Sung (Department of Electronics, Information and Communication, Kyungsung University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.47, no.6, 2010 , pp. 22-25 More about this Journal
Abstract
This paper presents the modified design that can reject the harmonic signals in the branch-line coupler. After adding open stubs at the center of quarter-wavelength lines of the traditional design, all network parameters can be determined by network equivalence, in order to maintain the conventional function at the operating frequency and suppress its harmonic terms to de chosen. Experimental results show the second and third harmonic suppressions to be -37.5 and -42.7dBs, while maintaining conventional performance at the fundamental frequency.
Keywords
Branch-line coupler; Harmonic Suppression;
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1 Myun-Joo Park, "Dual-Band, Unequal Length Branch-Line Coupler with Center-Tapped Stubs," IEEE Microwave and Wireless Components Letters, Vol. 19, No. 10, pp. 617-619, Oct., 2009.   DOI
2 K. K. M. Cheng and F. L. Wong, "A Novel Approach to the Design and Implementation of Dual-Band Compact $90^{\circ}$ Branch-Line Coupler," IEEE Trans. Microwave Theroy Tech., Vol. 52, no. 11, pp. 2458-2463, Nov., 2004.   DOI   ScienceOn
3 Kae-Oh Sun, Sung-Jin Ho, Chih-Chuan Yen, and Daniel van der Weide, "A Compact Branch-Line Coupler Using Discontinuous Microstrip Lines," IEEE Microwave and Wireless Components Letters, Vol. 15, No. 8, pp. 519-520, Aug., 2005.   DOI
4 D. M. Pozar, Microwave Engineering, 2nd ed. New York: Wiley, 1998.
5 W. G. Jeon and Y. S. Cho, "An equalization technique for OFDM and MC-CDMA in a multipath fading channels," in Proc. of IEEE Conf. on Acoustics, Speech and Signal Processing, pp. 2529-2532, Munich, Germany, May 1997.
6 H. Hualiang and K. J. Chen, "A Stub Tapped Branch-Line Coupler for Dual-Band Operations," IEEE Microwave and Wireless Components Letters, Vol. 17, No. 2, pp. 106-108, Feb., 2007.   DOI