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Session: THPJ3:00 PM Thursday, May 27, 2010 Room: 204ABC |
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Session: THPJ | Advances in Metamaterial, EM Analysis and Circuit Modeling |
Chair: | Tapan K. Sarkar, Syracuse University |
Co-Chair: | Peter Aaen, Freescale Semiconductor Inc |
| | THPJ-1 | The Quantum Effects on The Transmission Properties of Periodic Rod Array | 3:00 PM-5:00 PM | S. Li1, Q. Zhu1, X. Yu1, N. Zhou1, R. Mo1, W. Liu2, H. Xin3, L. Qiu4, 1University of Sci. &Tech. of China, Hefei, China, 2University of Sci. &Tech. of China, Hefei, China, 3Univ. of Arizona, Tucson, United States, 4Stanford University, Stanford, United States |
(1342) | In this paper, the transmission properties of three 1-row periodic rod arrays, namely perfect conductor array, copper array with surface conductivity and single wall carbon nanotube (SWCNT) array with quantum conductivity, are investigated. MoM with special algorithms of Toeplitz matrices is employed. It is found that, due to the quantum effects, SWCNT array can transmit energy in a lower frequency and has broader passband. After that, the transmission properties of multi-row SWCNT array have been analyzed. Numerical results reveal that multi-row structure of SWCNT can improve the transmission efficiency. | | |
THPJ-2 | Experimental Dielectric Sensing of materials using Epsilon-Near-Zero tunnel in SIW technology. | 3:00 PM-5:00 PM | H. Lobato-Morales1, A. Corona-Chavez1, D. V. Murthy1, J. Martinez-Brito2, L. G. Guerrero-Ojeda2, 1INAOE, Tonanzintla, Mexico, 2UDLA-P, Cholula, Mexico |
(1810) | A planar Epsilon-Near-Zero structure implemented on substrate integrated waveguide technology is used for the characterization of material dielectric permittivity. The proposed structure has very high sensitivity which yields more accurate results when compared to other techniques, such as perturbation of conventional cavities. This prototype presents a low profile, low cost, ease of fabrication and ease of integration, which add important characteristics for portable material analysis systems. Measurements are in good agreement with standard values. | | |
THPJ-3 | A Concentrically Corrugated Near-Field Plate | 3:00 PM-5:00 PM | M. F. Imani, A. Grbic, University of Michigan, Ann Arbor, United States |
(1833) | We present a concentrically corrugated near-field plate which can form a subwavelength near-field focus. The experimental plate consists of a coaxial aperture surrounded by non-periodic concentric corrugations. The measured subwavelength patterns are compared to those created by a coaxial probe with similar dimensions and are shown to be narrower. Excellent agreement between measurements and simulated results is observed. Finally, the frequency response of the plate is experimentally studied. The presented near-field plate will find applications in near-field probing. | | |
THPJ-4 | A Sparse Grid based Collocation Method for Model Order Reduction of Finite Element Approximations of Passive Electromagnetic Devices under Uncertainty | 3:00 PM-5:00 PM | P. S. Sumant1, H. Wu2, A. C. Cangellaris1, N. R. Aluru3, 1University of Illinois at Urbana-Champaign, Urbana, United States, 2Extreme-DA Corporation, Santa Clara, United States, 3University of Illinois at Urbana-Champaign, Urbana, United States |
(1317) | A methodology is proposed for the model order reduction of finite element approximations of passive electromagnetic devices under random input conditions. In this approach, the reduced order system matrices are represented in terms of their convergent orthogonal polynomial expansions of input random variables. The coefficients of these polynomials, which are matrices, are obtained by repeated, deterministic model order reduction of finite element models generated for specific values of the input random variables. These values are chosen efficiently in a multi-dimensional grid using a Smolyak algorithm. The stochastic reduced order model is represented in the form of an augmented system which can be used for generating the desired statistics of the specific system response. The proposed method provides for significant improvement in computational efficiency over standard Monte Carlo. | | |
THPJ-5 | A FDFD based Eigen-Dielectric Formulation of the Maxwell Equations for Material Characterization in Arbitrary Waveguide Structures | 3:00 PM-5:00 PM | A. Gaebler, F. Goelden, O. H. Karabey, R. Jakoby, Technische Universitaet Darmstadt, Darmstadt, Germany |
(1626) | This paper presents a novel numerical scheme for the extraction of dielectric material parameters using the transmission line method. This method is performed by formulating the discretized Maxwell equations as an eigenpermittivity, permeability or an eigenconductivity problem of the considered sample within an arbitrary and generally inhomogeneous filled waveguide cross section. This allows the direct calculation of the desired material parameter by performing only one full wave simulation. Hence, it is very useful if simplified analytical approaches do not provide the aimed accuracy or even fail completely. This procedure will be demonstrated by applying a modified 2D Finite Differences Frequency Domain scheme to the complex permittivity simulation of arbitrary shaped and placed samples within a waveguide cross section. | | |
THPJ-6 | Shape-Preserving Response Prediction for Microwave Circuit Modeling | 3:00 PM-5:00 PM | S. Koziel, Reykjavik University, Reykjavik, Iceland |
(1056) | A new and simple surrogate modeling technique for microwave devices is presented. Our method exploits a recently introduced shape-preserving response prediction procedure that allows us to estimate the response (e.g., S-parameters over certain frequency range) of the computationally expensive microwave structure by examining the response of the computationally cheap (e.g., circuit equivalent) model of the structure. It is demonstrated that the proposed approach offers good modeling accuracy which is better than the accuracy provided by the space mapping approach, even when a very tight limit on the number of base designs used to set up a surrogate model is imposed. | | |
THPJ-7 | A Simplified Methodology for Matched Filter Design with constraints - Filter-Antenna Subsystem for Space Application | 3:00 PM-5:00 PM | U. Naeem1, S. Bila1, S. Verdeyme1, H. Chreim1, R. Chantalat1, M. Thevenot1, T. Monediere1, B. Palacin2, Y. Cailloce3, 1XLIM-University of Limoges, Limoges, France, 2CNES, Toulouse, France, 3Thales Alenia Space, Toulouse, France |
(1255) | A new simplified methodology for the design of microwave cavity filters has been presented. The presented work is based on the optimization of Belevitch polynomials and inspired from the Simplified Real Frequency Technique (SRFT). one can bypass the use of computationally expensive circuit simulation softwares which are used to optimize the lumped element circuit model of the cavity filters. The procedure is applied for the design of filters for a multi-feed filter-antenna subsystem for space application. | | |
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