Space-filling curve RFID tags

J McVay, A Hoorfar, N Engheta - 2006 IEEE Radio and …, 2006 - ieeexplore.ieee.org
A completely passive radio frequency tag is proposed, utilizing the scattering from
electrically small but resonant inclusions. When placing these space-filling curve inclusions …

A retrieval method of effective electromagnetic parameters for inhomogeneous metamaterials

Y Shi, ZY Li, K Li, L Li, CH Liang - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
In this paper, we develop a method to extract effective electromagnetic parameters of
inhomogeneous metamaterials. Starting with a two-layer inhomogeneous structure, the …

Permittivity measurement of thin dielectric materials from reflection-only measurements using one-port vector network analyzers

UC Hasar - Progress In Electromagnetics Research, 2009 - jpier.org
We have proposed a simple waveguide method for complex permittivity determination of
dielectric materials which are not completely filling the entire sample holder. The method …

The influence of the water-covered dielectric radome on 77ghz automotive radar signals

N Chen, R Gourova, OA Krasnov… - 2017 European Radar …, 2017 - ieeexplore.ieee.org
A thin water film can easily form on the surface of an automotive radar dielectric radome
during adverse weather and it causes a considerable loss of the signal power due to …

A microwave method for noniterative constitutive parameters determination of thin low-loss or lossy materials

UC Hasar - IEEE transactions on microwave theory and …, 2009 - ieeexplore.ieee.org
A noniterative transmission-reflection method is proposed for instant measurement of
constitutive parameters of thin samples attached to a sample holder. It uses reflection-only …

An accurate complex permittivity method for thin dielectric materials

UC Hasar, O Simsek - Progress In Electromagnetics Research, 2009 - jpier.org
A promising microwave method has been proposed to accurately determine the complex
permittivity of thin materials. The method uses amplitude-only scattering parameter …

A calibration-independent microwave method for position-insensitive and nonsingular dielectric measurements of solid materials

UC Hasar, O Simsek - Journal of Physics D: Applied Physics, 2009 - iopscience.iop.org
Calibration-independent microwave methods have successfully been used to determine the
complex permittivity, ε, of dielectric materials by eliminating the necessity of the calibration …

Accurate complex permittivity inversion from measurements of a sample partially filling a waveguide aperture

UC Hasar - IEEE transactions on Microwave Theory and …, 2010 - ieeexplore.ieee.org
In this paper, we propose a microwave method, which eliminates the necessity of precise
knowledge of sample thickness for accurate permittivity determination of thin materials …

Theory and experiments on Peano and Hilbert curve RFID tags

J McVay, A Hoorfar, N Engheta - Wireless Sensing and …, 2006 - spiedigitallibrary.org
Recently, there has been considerable interest in the area of Radio Frequency Identification
(RFID) and Radio Frequency Tagging (RFTAG). This emerging area of interest can be …

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 …