Application of negative group delay active circuits to the design of broadband and constant phase shifters

نویسندگان

  • Blaise Ravelo
  • Marc Le Roy
  • André Pérennec
  • B. Ravelo
  • M. Le Roy
  • A. Pérennec
چکیده

The new phase-shifter configuration described in this report uses a negative group delay (NGD) active circuit. In this topology, a classical transmission line is set in cascade with an NGD circuit whose phase slopes are alike, but opposite, to get a constant and broadband phase shift. The proposed approach was validated through the design and measurement of a phase shifter, which exhibited a constant phase of 90°  5° over a 75% relative bandwidth around 1.6 GHz. Moreover, as the group delay of the NGD circuit compensated the transmission line one, the overall circuit group delay was kept to a small value in the operating frequency band.

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تاریخ انتشار 2013