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Proceedings of Conferences

Session 1 "Artificial Materials and Metamaterials"

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	Experimental Waveguide Characterization of a New Artificial Magnetic Particle (143.59 Kbytes) hot!	2004-06-29
Experimental waveguide characterization of a new artificial magnetic particle P. Ikonen, S. I. Maslovski, and S. A. Tretyakov Radio Laboratory / SMARAD, Helsinki University of Technology, P.O. Box 3000, FI-02015 HUT, Finland Abstract – This paper describes in detail the measurement procedure of a new artificial magnetic particle. A waveguide measurement technique is used to measure the scattering parameters of the particle. The results are processed to extract the magnetic polarizability. We generally introduce the measurement setup and carry out in detail the analysis for processing the results. The goal is to show that even when measuring complex particles, reasonable measurement accuracy can be achieved with a rather simple measuring cell.
		hits: 1364

	Numerical study of low profile directive antennas based on metamaterials (147.68 Kbytes) hot!	2004-06-29
Numerical study of low profile directive antennas based on metamaterials X. Dardenne and C. Craeye Universitй catholique de Louvain, Laboratoire TELE, Place du Levant, 2, 1348 Louvain-la-Neuve, Belgium, dardenne@tele.ucl.ac.be Abstract – This paper describes in detail the measurement procedure of a new artificial magnetic particle. A waveguide measurement technique is used to measure the scattering parameters of the particle. The results are processed to extract the magnetic polarizability. We generally introduce the measurement setup and carry out in detail the analysis for processing the results. The goal is to show that even when measuring complex particles, reasonable measurement accuracy can be achieved with a rather simple measuring cell.
		hits: 1348

	Metamaterials as super-substrate to enhance dipole antenna performances (562.73 Kbytes) hot!	2004-06-29
Metamaterials as super-substrate to enhance dipole antenna performances E. Sбenz⁽¹⁾, R. Gonzalo⁽¹⁾, I. Ederra⁽¹⁾, P. De Maagt⁽²⁾ ⁽¹⁾Electrical and Electronic Engineering Department, Universidad Publica de Navarra, Spain, ⁽²⁾European Space Research and Technology Centre, ESTEC, The Netherlands Abstract – In this work, pass band properties of Left Handed Media (LHM) are demonstrated. These properties have been used in order to make a LHM super-substrate is going to determine the characteristics of radiation patterns. Simulations with different types of configurations are presented in order to enhance the features of radiation patterns at bore-sight direction.
		hits: 1368

	Polarization transformation in the periodic structure of arrays of complex-shaped elements (59.18 Kbytes) hot!	2004-06-29
Polarization transformation in the periodic structure of arrays of complex-shaped elements D. Tyrnov Institute of Radio Astronomy of National Academy of Sciences of Ukraine, Krasnoznamennaya Street 4, 61002 Kharkov, Ukraine, email: tyrnov@rian.ira.kharkov.ua
		hits: 1293

	Transmission properties of one dimensional left handed composite meta-materials (195.75 Kbytes) hot!	2004-06-29
Transmission properties of one dimensional left handed composite meta-materials O.F. Gundogdu, N. Katsarakis, M. Kafesaki, C.M. Soukoulis, E.N. Economou FO.R.T.H., Institute of Electronic Structures and Laser, P.O. Box 1527, 71110, Heraklion, Crete, Greece Abstract- The electromagnetic behavior of one-dimensional composite meta-materials (CMMs) consisting of rectangular Split Ring Resonators (SRRs) and continuous wires was studied. The main purpose was to investigate if those composite meta-materials act as left handed materials which have the unique property of having both effective permittivity and effective permeability negative [1]. The transmission of electromagnetic waves (between 7-14 GHz) through the CMM was measured as well as the transmission through its various constituents (SRR-only and wire-only structures, and CMMs containing SRRs with no gaps). The transmission measurements were performed in free-space, using a HP 8722 ES network analyzer and microwave standard-gain horn antennas. It was found that CMM shows a transmission peak between 8.5 and 9.5GHz, within the frequency region where the SRR dip appears and below the cut-off frequency of the system of wires+closed SRRs. This was taken as a strong evidence for left handed behavior.
		hits: 1324

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