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

Ravelo B. | Zendy; Le Roy M. | Zendy; Pérennec A. | Zendy

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

Author(s) -

Ravelo B.,

Le Roy M.,

Pérennec A.

Publication year - 2008

Publication title -

microwave and optical technology letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.304

H-Index - 76

eISSN - 1098-2760

pISSN - 0895-2477

DOI - 10.1002/mop.23883

Subject(s) - group delay and phase delay , broadband , electronic circuit , constant (computer programming) , phase shift module , phase (matter) , electrical engineering , electronic engineering , physics , telecommunications , engineering , computer science , bandwidth (computing) , quantum mechanics , programming language

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. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3078–3080, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23883

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