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Analyzing of Coupling Region for CRLH/RH TL Coupler with Lumped-ElementsY. Wang, Yewen Zhang, and F. Liu doi:10.2529/PIERS060903232651 Downloads: 1158 Abstract:The coupling region of the CRLH/RH TL coupler, which is composed of a composite right/left-handed transmission line (CRLH TL) with lumped-elements and a conventional right-handed transmission line (RH TL), is explicitly decided. Detailed formulas are given to define the frequency band edge of the coupling region. ADS S-parameter simulations are demonstrated to confirm our theoretical results.References:1. Iyer, A. K. and G. V. Eleftheriades, "Negative refractive index matematerials supporting 2-D wave," IEEE MTT-S Int. Microwave Symp. Dig., 1067-1070, 2002. 2. Caloz, C. and T. Itoh, "Application of the transmission line theory of left-handed(LH) materials to the realization of a microstrip `LH Line'," IEEE AP- S Int. Symp. Dig., Vol. 2, 412-415, 2002. 3. Oliner, A. A., "A periodic-structure negative-refractive-index medium without resonant elements," IEEE AP-S/URSI Int. Symp. Dig., 41, 2002. 4. Grbic, A. and G. V. Eleftheriades, "Experimental verification of backward-wave radiation from a negative index metamaterial," J. Appl. Phys., Vol. 92, No. 10, 5930-5934, Nov., 2002. 5. Antoniades, M. and G. V. Eleftheriades, "Compact, linear, lead/lag metamaterial phase shifters for broadband applications," IEEE Antennas Wireless Propag. Lett., Vol. 2, No. 7, 103-106, 2003. 6. Caloz, C., A. Sanada, and T. Itoh, "A novel composite right/left-handed coupled-line directional coupler with arbitrary coupling level and broad bandwidth," IEEE Trans. Micro. Theo. Tech., Vol. 52, No. 980, 992, 2004. 7. Caloz, C. and T. Itoh, "A novel mixed conventional microstrip and composite right/left-handed backward-wave directional coupler with broadband and tight coupling characteristics," IEEE Micro. Wireless Comp. Lett., Vol. 14, No. 1, 31-33, 2004. 8. Islam, R. and G. V. Eleftheriades, "A planar metamaterial co-directional coupler that couples power backward," IEEE-MTT Int. Symp. Dig., 321-324, June, 2003. 9. Islam, R. and G. V. Eleftheriades, "Printed high-directivity metamaterial MS/NRI coupled-line coupler for signal monitoring applications," IEEE Micro. Wireless Comp. Lett., Vol. 16, No. 4, 164-166, April, 2006. 10. Wang, Y., Y. Zhang, L. He, F. Liu, H. Li, and H. Chen, "Discussion on coupling mechanism of asymmetric CRLH/RH TL coupler," J. Zhejiang Univ. Science A, 95-98, 2006. 11. Kirschning, M. and R. H. Jansen, "Accurate wide-range design equations for the frequency-dependent characteristic of parallel coupled microstrip lines," IEEE Trans. Micro. Theo. Tech., Vol. MTT-32, 83-90, Jan. 1984. |
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