Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Design Method for Negative Group Delay Circuits Based on Relations among Signal Attenuation, Group Delay, and Bandwidth

  • Na, Sehun (Department of Electronics Engineering, College of Electronics and Information, Kyung Hee University) ;
  • Jung, Youn-Kwon (Avionics Radar Team, Hanwha Systems) ;
  • Lee, Bomson (Department of Electronics Engineering, College of Electronics and Information, Kyung Hee University)
  • Received : 2018.05.21
  • Accepted : 2018.11.11
  • Published : 2019.01.31
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Abstract

Typical negative group delay circuits (NGDC) are analyzed in terms of signal attenuation, group delay, and bandwidth using S-parameters. By inverting these formulations, we derive and present the design equations (for NGD circuit elements) for a desired specification of the two among the three parameters. The proposed design method is validated through simulation examples for narrow- and wide-band pulse inputs in the time and frequency domains. Moreover, an NGDC composed of lumped elements is fabricated at 1 GHz for measurement. As a function of frequency, the circuit-/EM-simulated and measured group delays are in good agreement. The provided simple NGDC design equations may be useful for many applications that require compensations of some signal delays.

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