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access icon free Transmission-type negative group delay networks using coupled line doublet structure

This study presents a novel approach to the design and implementation of transmission-type negative group delay (NGD) networks based on a coupled line doublet structure. To improve the reflection coefficients, a quarter-wavelength transmission line is connected between the input and through ports of a coupled line section. For the doublet structure, two coupled line sections are arranged in a symmetrical manner by connecting them back-to-back with the help of the quarter- wavelength through line. For the experimental demonstration, two planar NGD networks (unmatched and matched doublet NGD networks) are designed, simulated and measured at a centre frequency of 2.14 GHz. From the measurement, a group delay (GD) of −5.66 ns and signal attenuation (SA) of 18.78 dB were obtained in the case of an unmatched NGD network. Similarly, for the matched NGD case, a GD of −6.33 ns, SA of 20.69 dB and input/output return losses >29 dB were obtained at the centre frequency.

References

    1. 1)
      • 26. Choi, H., Song, K., Kim, C.D., Jeong, Y.: ‘Synthesis of negative group delay time circuit’. Proc. of Asia Pacific Microwave Conf., 2008, pp. 14.
    2. 2)
    3. 3)
      • 7. Noto, H., Yamauchi, K., Nakayama, M., Isota, Y.: ‘Negative group delay circuit for feed forward amplifier’. IEEE Int. Microwave Symp. Digest, 2007, pp. 11031106.
    4. 4)
    5. 5)
    6. 6)
    7. 7)
      • 34. Mathaei, G., Young, L., Jones, E.M.T.: ‘Microwave filters: impedance matching networks and coupling structures’ (Artech. House, Dedham, MA, 1964).
    8. 8)
    9. 9)
    10. 10)
    11. 11)
    12. 12)
    13. 13)
    14. 14)
    15. 15)
    16. 16)
    17. 17)
    18. 18)
      • 20. Choi, H., Chaudhary, G., Moon, T., Jeong, Y., Lim, J., Kim, C.D.: ‘A design of composite negative group delay circuit with lower signal attenuation for performance improvement of power amplifier linearization techniques’. IEEE Int. Microwave Symp. Digest, 2011, pp. 14.
    19. 19)
      • 35. Pozar, D.M.: ‘Microwave engineering’ (John Wiley & Sons, Inc., 1998, 4th edn.).
    20. 20)
      • 25. Ravelo, B., Perennec, A., Roy, M.Le.: ‘Synthesis of broadband negative group delay active circuits’. IEEE Int. Microwave Symp. Digest, 2007, pp. 21772180.
    21. 21)
    22. 22)
    23. 23)
    24. 24)
    25. 25)
      • 17. Choi, H., Kim, Y., Jeong, Y., Kim, C.D.: ‘Synthesis of reflection type negative group delay circuit using transmission line resonator’. Proc. of 39th European Microwave Conf., 2009, pp. 902605.
    26. 26)
    27. 27)
    28. 28)
    29. 29)
    30. 30)
      • 19. Choi, H., Kim, Y., Jeong, Y., Lim, J.: ‘A design of size-reduced negative group delay circuit using a stepped impedance resonator’. Proc. of Asia-Pacific Microwave Conf., 2010, pp. 1181121.
    31. 31)
    32. 32)
      • 10. Solli, D., Chiao, R.Y.: ‘Superluminal effects and negative delays in electronics, and their application’, Phys. Rev. E, Stat. Phys. Plasmas Fluids Relat. Interdiscip. Top., 2002, 5, pp. 056601105661014.
    33. 33)
      • 2. Brillouin, L.: ‘Wave propagation and group velocity’ (Academic Press, New work, 1960).
    34. 34)
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