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Analytical modeling of H‐shape distributed topology with bandpass negative group delay behavior
Author(s) -
Li Ningdong,
Wan Fayu,
Ravelo Blaise
Publication year - 2020
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22295
Subject(s) - topology (electrical circuits) , stub (electronics) , microstrip , band pass filter , center frequency , group delay and phase delay , network topology , representation (politics) , equivalent circuit , electronic engineering , computer science , physics , engineering , telecommunications , electrical engineering , bandwidth (computing) , voltage , politics , law , political science , operating system
This article describes an analytical modeling of a distributed negative group delay (NGD) circuit presenting a H‐shape topology. It acts as an innovative typical transmission line (TL) based topology with a feedback connected with an open‐stub termination. The equivalent circuit diagram is established based on TL representation of H‐topology constituting elements. The S‐matrix analytical model is developed. To validate the analytical model, a proof‐of‐concept prototype implemented in microstrip topology is designed, simulated, fabricated, and measured. The compared calculated, simulated, and measured S‐parameters are in very good agreement. In addition, the microstrip prototype confirm the bandpass NGD behavior of the H‐topology circuit with NGD value of approximately −2 ns around the center frequency 1.67 GHz.
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