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Miniaturized CRLH Dual-Band Couplers and Their Applications in Beam Pattern Diversity Systems

Miniaturized CRLH Dual-Band Couplers and Their Applications in Beam Pattern Diversity Systems.

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Miniaturized CRLH Dual-Band Couplers and Their Applications in Beam Pattern Diversity Systems

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  1. Miniaturized CRLH Dual-Band Couplers and Their Applications in Beam Pattern Diversity Systems P.-L. Chi and T. Itoh, “Miniaturized dual-band directional couplers using composite right/left-handed transmission structures and their applications in beam pattern diversity systems,” IEEE Trans. Microw. Theory Tech., vol. 57, no. 5, pp. 1207-1215, May 2009 Advisor: Prof. Ruey-Beei Wu Speaker: Ting-Yi Huang (黃定彝)

  2. Outlines • Introduction • CRLH transmission structures • Dual-band CRLH components • Application • Conclusion

  3. Introduction: CRLH Tx Lines • Composite right/left-handed (CRLH) tx lines • Bandpass response • Designable phase characteristic C. Caloz and T. Itoh, “Novel microwave devices and structures based on the transmission line approach of meta-materials,” in IEEE MTT-S Int. Microw. Symp. Dig., Jun. 2003, pp. 195–198

  4. Introduction: Couplers • Branch-line coupler • 90° hybrid • Rat-race coupler • 180° hybrid D. M. Pozar, Microwave Engineering, 2nd ed, New York: Wiley, 1998, ch. 7

  5. Introduction: Beam Forming http://en.wikipedia.org/wiki/File:Beamforming.jpg

  6. CRLH Transmission Structures Unit cell: For n cells:

  7. Dual-Band Branch Line Coupler (1/2)

  8. Dual-Band Branch Line Coupler (2/2)

  9. Dual-Band Rat-Race Coupler (1/2) P.-L. Chi, C.-J. Lee, and T. Itoh, “A compact dual-band metamaterial-based rat-race coupler for a MIMO system application,” in IEEE MTT-S Int. Microw. Symp. Dig., 2008

  10. Dual-Band Rat-Race Coupler (2/2) P.-L. Chi, C.-J. Lee, and T. Itoh, “A compact dual-band metamaterial-based rat-race coupler for a MIMO system application,” in IEEE MTT-S Int. Microw. Symp. Dig., 2008

  11. Dual-Band Delay Line

  12. Dual-Band Antenna

  13. Dual-Band Beam Forming: Type I P.-L. Chi, C.-J. Lee, and T. Itoh, “A compact dual-band metamaterial-based rat-race coupler for a MIMO system application,” in IEEE MTT-S Int. Microw. Symp. Dig., 2008

  14. Beam Forming Type I: Result P.-L. Chi, C.-J. Lee, and T. Itoh, “A compact dual-band metamaterial-based rat-race coupler for a MIMO system application,” in IEEE MTT-S Int. Microw. Symp. Dig., 2008

  15. Dual-Band Beam Forming: Type II f1 f2 P.-L. Chi and T. Itoh, “Metamaterial-based components for a compact dual-band beam pattern diversity system,” in Proc. 38th Eur. Microw. Conf., Oct. 2008, pp. 555–558.

  16. Beam Forming Type II: Result P.-L. Chi and T. Itoh, “Metamaterial-based components for a compact dual-band beam pattern diversity system,” in Proc. 38th Eur. Microw. Conf., Oct. 2008, pp. 555–558.

  17. Dual-Band Beam Forming: Type III f1 f2

  18. Dual-Band Beam Forming: Type III

  19. Conclusions • Miniaturized CRLH dual-band components • 90° hybrid, 180° hybrid, and delay line • Miniaturization by investigating all possible phase variation • Dual-band beam forming • Three possible beam forming system • Different beam forming behavior at both bands

  20. Thanks for your attention.

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