Determination of reference-plane invariant, thickness-independent, and broadband constitutive parameters of thin materials

UC Hasar, Y Kaya, JJ Barroso… - IEEE Transactions on …, 2015 - ieeexplore.ieee.org
We propose an effective microwave method for reference-plane-invariant and thickness-
independent constitutive parameters measurement of thin materials. A function depending …

Determination of complex permittivity of low-loss samples from position-invariant transmission and shorted-reflection measurements

UC Hasar - IEEE Transactions on Microwave Theory and …, 2017 - ieeexplore.ieee.org
In this paper, we devise a position-invariant method for unique and accurate complex
permittivity (ε r) determination of low-loss samples from transmission and shorted-reflection …

Retrieval of effective electromagnetic parameters of isotropic metamaterials using reference-plane invariant expressions

UC Hasar, JJ Barroso, C Sabah, IY Ozbek… - Progress In …, 2012 - jpier.org
Three different techniques are applied for accurate constitutive parameters determination of
isotropic split-ring resonator (SRR) and SRR with a cut wire (Composite) metamaterial (MM) …

Attractive method for thickness-independent permittivity measurements of solid dielectric materials

UC Hasar, JJ Barroso, M Bute, Y Kaya… - Sensors and Actuators A …, 2014 - Elsevier
We propose a non-resonant-type method for reference-plane invariant and thickness-
independent permittivity measurement of solid dielectric materials when there is no …

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 …

Determination of propagation constants and wave impedance of non-reciprocal networks from position-insensitive waveguide measurements

UC Hasar, Y Kaya, M Izginli, H Ozturk… - IEEE Transactions …, 2022 - ieeexplore.ieee.org
A microwave method is proposed to determine the forward and backward propagation
constants (and) and the wave impedance () of reciprocal and non-reciprocal microwave …

Microwave method for reference-plane-invariant and thickness-independent permittivity determination of liquid materials

UC Hasar, Y Kaya, M Bute, JJ Barroso… - Review of Scientific …, 2014 - pubs.aip.org
An attractive transmission-reflection method based on reference-plane invariant and
thickness-independent expressions has been proposed for accurate and unique retrieval of …

Reference-plane invariant transmission-reflection method for measurement of constitutive parameters of liquid materials

UC Hasar, JJ Barroso, Y Kaya, M Ertugrul… - Sensors and Actuators A …, 2013 - Elsevier
We propose a new transmission-reflection method for measuring constitutive parameters of
liquid samples inside an asymmetric measurement cell (a sample over a low-loss holder in …

Reference-plane-invariant effective thickness and electromagnetic property determination of isotropic metamaterials involving boundary effects

UC Hasar, JJ Barroso, G Buldu, M Bute… - IEEE Journal of …, 2014 - ieeexplore.ieee.org
It is well recognized that near-field effects become dominant when the metamaterial (MM) is
in resonance. In addition, any inaccurate information of the location of reference planes, and …

Noniterative complex permittivity retrieval using calibration-independent waveguide measurements

UC Hasar, Y Kaya - Sensors and Actuators A: Physical, 2017 - Elsevier
Calibration-independent nonresonant measurements can be employed to eliminate the
need for calibration before microwave measurements. These methods generally assume …