Kartci, A.Herencsar, N.Machado, J. A. TenreiroBrancik, L.2022-01-122022-01-1220201805-9600http://hdl.handle.net/10400.22/19432This paper presents a state-of-the-art survey in the area of fractional-order element passive emulators adopted in circuits and systems. An overview of the different approximations used to estimate the passive element values by means of rational functions is also discussed. A short comparison table highlights the significance of recent methodologies and their potential for further research. Moreover, the pros and cons in emulation of FOEs are analyzed.engCircuit synthesisConstant phase elementFractional-order capacitorFactional-order elementFractional-order emulatorRC networkRL networkjournal article10.13164/re.2020.0296