A review of the scattering-parameter extraction method with clarification of ambiguity issues in relation to metamaterial homogenization

S Arslanagić, TV Hansen, NA Mortensen… - IEEE Antennas and …, 2013 - ieeexplore.ieee.org
The scattering-parameter extraction method of metamaterial homogenization is reviewed to
show that the only ambiguity is that related to the choice of the branch of the complex …

Unique retrieval of complex permittivity and permeability of dispersive materials from reflection and transmitted fields by enforcing causality

VV Varadan, R Ro - IEEE transactions on Microwave Theory …, 2007 - ieeexplore.ieee.org
The electromagnetic properties of general classes of materials can be obtained by inverting
the measured or numerically simulated reflection (S 11) and transmission (S 21) coefficients …

A broadband and stable method for unique complex permittivity determination of low-loss materials

UC Hasar, CR Westgate - IEEE transactions on Microwave …, 2009 - ieeexplore.ieee.org
Transmission-reflection methods suffer from the increasing uncertainty in the phase of
reflection scattering (S-) parameter measurements of low-loss materials. In addition …

Measurement of the electromagnetic properties of chiral composite materials in the 8-40 GHz range

VV Varadan, R Ro, VK Varadan - Radio science, 1994 - ieeexplore.ieee.org
Materials described by the constitutive equations D=∊ E+ β∊∇× E and B= μH+ βμ∇× H lack
inversion symmetry due to chirality or handedness in their microstructure. In this paper, we …

A general computer program for precise calculation of dielectric properties from short-circuited waveguide measurements

SO Nelson, LVE Stetson… - IEEE Transactions on …, 1974 - ieeexplore.ieee.org
Principles underlying the short-circuited-waveguide measurement method and a general
computer program for precisely calculating dielectric properties of materials from such …

Elimination of the multiple‐solutions ambiguity in permittivity extraction from transmission‐only measurements of lossy materials

UC Hasar - Microwave and Optical Technology Letters, 2009 - Wiley Online Library
A simple yet powerful method is proposed for removing the multiple solutions problem in the
complex permittivity, ϵ, determination from measured transmission scattering (S‐) parameter …

Retrieval approach for determination of forward and backward wave impedances of bianisotropic metamaterials

UC Hasar, JJ Barroso - Progress In Electromagnetics Research, 2011 - jpier.org
A simple approach is proposed for retrieving the forward and backward wave impedances of
lossless and lossy bianisotropic metamaterials. Compared with other methods in the …

Closed form Kramers–Kronig relations to extract the refractive index of metamaterials

Z Szabó - IEEE Transactions on Microwave Theory and …, 2017 - ieeexplore.ieee.org
Closed form expressions of the Kramers-Kronig and of the multiply subtractive Kramers-
Kronig relations are derived to predict the real part of the refractive index from the imaginary …

Artificial neural network model for evaluating parameters of reflection-asymmetric samples from reference-plane-invariant measurements

UC Hasar, H Ozturk, M Ertugrul… - IEEE Transactions …, 2023 - ieeexplore.ieee.org
A technique based on artificial neural network (ANN) is proposed to extract the
electromagnetic properties of reflection-asymmetric samples from reference-plane-invariant …

A generalized formulation for permittivity extraction of low-to-high-loss materials from transmission measurement

UC Hasar - IEEE transactions on microwave theory and …, 2010 - ieeexplore.ieee.org
We have derived a one-variable metric function for fast computations of the relative complex
permittivity of low-to-high-loss materials from S 21 measurement at one frequency. We …