Microwave Microelectronics Laboratory

Home

Archives

Webmail

Tuesday, 09 June 2026

View categories	Search document
You must login to submit new documents

Downloads

Proceedings of Conferences

Session 1 "Artificial Materials and Metamaterials"

Order by: name | date | hits [ascendent]

Documents in this subcategory		Date added


	Design of a circularly polarised patch antenna phase array on a high K EBG substrate (381.05 Kbytes) hot!	2004-06-29
Design of a circularly polarised patch antenna phase array on a high K EBG substrate J. C. Iriarte Galarregui⁽¹⁾, I. Ederra⁽¹⁾, R. Gonzalo Garcia⁽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
		hits: 9044

	Modeling of artificial isotropic double negative (DNG) media composed by spherical particle lattices embedded in a dielectric matrix (265.39 Kbytes) hot!	2004-06-29
Modeling of artificial isotropic double negative (DNG) media composed by spherical particle lattices embedded in a dielectric matrix I. Kolmakov⁽¹⁾, M. Gashinova⁽²⁾, O. Vendik⁽²⁾ ⁽¹⁾Department of Microelectronics & Radio Engineering, St. Petersburg Electrotechnical University, Russia, ⁽²⁾Department of Electronics, St. Petersburg Electrotechnical University, Russia Abstract – The periodic composite medium consisting of two lattices of different dielectric spherical particles has been investigated analytically and numerically. It is shown that effective double negative media (DNG) can be realized in the frequency region where resonance of TM mode in the particles of one kind and TE mode in the particles another kind exist simultaneously. Ferroelectric single crystals or ceramic samples with dielectric constant about 1000 can be used as a suitable material for manufacturing the spherical particles.
		hits: 7694

	Transport in narrow minigap superlattices and the terahertz Bloch oscillator (167.71 Kbytes) hot!	2004-06-29
Transport in narrow minigap superlattices and the terahertz Bloch oscillator D.I.Zinchenko⁽¹⁾, A.A.Andronov⁽¹⁾, M.N.Drozdov⁽¹⁾, Yu.N.Nozdrin⁽¹⁾, A.Sosnin⁽¹⁾, A.Ustinov⁽¹⁾, V.I.Shashkin⁽¹⁾, A.A.Marmalyuk⁽²⁾ and A.A.Padalitsa⁽²⁾ ⁽¹⁾Institute for Physics of Microstructures, Russian Academy of Sciences, Russia, ⁽²⁾SIGM plus, Russia Abstract – Transport properties of GaAs-GaAlAs weak barrier superlattices are studied by computer simulation and observation of current-voltage curves and the terahertz emission. Existence of terahertz dynamic negative differential conductivity is demonstrated in the simulation. The observed terahertz emission is considered as due to incoherent Bloch oscillation emission. Prospect for the terahertz Bloch oscillator based on such superlattices is discussed.
		hits: 7452

	Ferroelectric (Ba,Sr)TiO3 ceramics for tunable wakefield accelerating structures (252.32 Kbytes) hot!	2004-06-29
Ferroelectric (Ba,Sr)TiO3 ceramics for tunable wakefield accelerating structures S. S. Karmanenko, A. A. Semenov, and P. Yu. Belyavskiy Dept. of Electron-ion processing of solids, St.-Petersburg Electrotechnical University, 5 Prof. Popov st., 197376, St. Petersburg, Russia Abstract – The results of complex study of (Ba,Sr)TiO3 (BST) ceramics with magnesium (BSM) and lanthanoid (BSL) additives, which are used to vary the resonant frequency of a dielectric loaded structure in the wakefield accelerating structures are presented. The structure consists of a thin layer of ferroelectric material backing a layer of linear ceramic with high quality factor. The interdigital electrodes formed on the external surface of double ceramic layer are used to apply DC bias voltage to vary the permittivity of the ferroelectric layer and tune the overall frequency of accelerating structure. Three different techniques of electrode-less measurements of microwave dielectric characteristics of ferroelectric ceramics are presented. Suitable material for this application is BST ferroelectric-oxides compound with a dielectric constant of 300-500. A tuning range of 2-4 % could be achieved for an 11-13 GHz dielectric accelerating structure.
		hits: 7372

	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: 5946

<< Start < Previous 1 2 3 Next > End >>