Vol. 63

Front:[PDF file] Back:[PDF file]
Latest Volume
All Volumes
All Issues
2016-10-10

A Miniaturized Directional Coupler Using Complementary Split Ring Resonator and Dumbbell-Like Defected Ground Structure

By Lizhong Song and Yuming Nie
Progress In Electromagnetics Research Letters, Vol. 63, 53-57, 2016
doi:10.2528/PIERL16060302

Abstract

A novel microstrip coupled-line directional coupler is proposed in this paper. It is based on the introduction of a complementary split ring resonator and dumbbell-like defected ground structure on the coupled lines to strongly enhance the designed backward coupling. The designed frequency band is from 1.2 to 1.5 GHz. The coupler is fabricated and tested. The insertion loss is less than 3.5 dB. The simulated and measured return losses are better than -13.5 dB, and the isolation is higher than 20 dB across the operating band. The overall size of the coupler is 80 mm×70 mm, which is about 0.36λ×0.32λ at the central frequency 1.35 GHz.

Citation


Lizhong Song and Yuming Nie, "A Miniaturized Directional Coupler Using Complementary Split Ring Resonator and Dumbbell-Like Defected Ground Structure," Progress In Electromagnetics Research Letters, Vol. 63, 53-57, 2016.
doi:10.2528/PIERL16060302
http://jpier.org/PIERL/pier.php?paper=16060302

References


    1. Chudzik, M., I. Arnedo, A. Lujambio, I. Arregui, F. Teberio, M. Laso, and T. Lopetegi, "Microstrip coupled-line directional coupler with enhanced coupling based on ebg concept," Electronics Letters, Vol. 47, No. 23, 1284-1286, 2011.
    doi:10.1049/el.2011.2156

    2. Chi, P.-L. and T. Itoh, "Miniaturized dual-band directional couplers using composite right/left-handed transmission structures and their applications in beam pattern diversity systems," IEEE Transactions on Microwave Theory and Techniques, Vol. 57, No. 5, 1207-1215, 2009.
    doi:10.1109/TMTT.2009.2017350

    3. Hirota, A., Y. Tahara, and N. Yoneda, "A compact forward coupler using coupled composite right/left-handed transmission lines," IEEE Transactions on Microwave Theory and Techniques, Vol. 57, No. 12, 3127-3133, 2009.
    doi:10.1109/TMTT.2009.2034304

    4. Elhiwairis, M. Y. O., S. K. B. A. Rahim, U. A. K. Okonkwo, N. B. M. Jizat, and M. F. B. Jamlos, "Miniaturized size branch line coupler using open stubs with high-low impedances," Progress In Electromagnetics Research Letters, Vol. 23, 65-74, 2011.
    doi:10.2528/PIERL11022306

    5. Wang, C.-C., C.-H. Lai, and T.-G. Ma, "Miniaturized coupled-line couplers using uniplanar synthesized coplanar waveguides," IEEE Transactions on Microwave Theory and Techniques, Vol. 58, No. 8, 2266-2276, 2010.
    doi:10.1109/TMTT.2010.2052667

    6. Djerafi, T. and K. Wu, "Super-compact substrate integrated waveguide cruciform directional coupler," IEEE Microwave and Wireless Components Letters, Vol. 17, No. 11, 757-759, 2007.
    doi:10.1109/LMWC.2007.908040

    7. Hao, Z., W. Hong, J. X. Chen, H. Zhou, and K. Wu, "Single-layer substrate integrated waveguide directional couplers," IEE Proceedings — Microwaves, Antennas and Propagation, Vol. 153, No. 5, 426-431, 2006.
    doi:10.1049/ip-map:20050171

    8. Hsu, S.-K., C.-H. Tsai, and T.-L. Wu, "A novel miniaturized forward-wave directional coupler with periodical mushroom-shaped ground plane," IEEE Transactions on Microwave Theory and Techniques, Vol. 58, No. 8, 2277-2283, 2010.
    doi:10.1109/TMTT.2010.2052869

    9. Hsu, S.-K., J.-C. Yen, and T.-L.Wu, "A novel compact forward-wave directional coupler design using periodical patterned ground structure," IEEE Transactions on Microwave Theory and Techniques, Vol. 59, No. 5, 1249-1257, 2011.
    doi:10.1109/TMTT.2011.2104978

    10. Mandal, M. K. and S. Sanyal, "A novel defected ground structure for planar circuits," IEEE Microwave and Wireless Components Letters, Vol. 16, No. 2, 93-95, 2006.
    doi:10.1109/LMWC.2005.863192

    11. Kim, C.-S., J.-S. Park, D. Ahn, and J.-B. Lim, "A novel 1-d periodic defected ground structure for planar circuits," IEEE Microwave and Guided Wave Letters, Vol. 10, No. 4, 131-133, 2000.
    doi:10.1109/75.846922

    12. Kim, C.-S., J.-S. Lim, S. Nam, K.-Y. Kang, and D. Ahn, "Equivalent circuit modelling of spiral defected ground structure for microstrip line," Electronics Letters, Vol. 38, No. 19, 1, 2002.

    13. Ahn, D., J.-S. Park, C.-S. Kim, J. Kim, Y. Qian, and T. Itoh, "A design of the low-pass filter using the novel microstrip defected ground structure," IEEE Transactions on Microwave Theory and Techniques, Vol. 49, No. 1, 86-93, 2001.
    doi:10.1109/22.899965

    14. Baena, J. D., et al., "Equivalent-circuit models for split-ring resonators and complementary split-ring resonators coupled to planar transmission lines," IEEE Transactions on Microwave Theory and Techniques, Vol. 53, No. 4, 1451-1461, 2005.
    doi:10.1109/TMTT.2005.845211