bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ultra‐wideband GCPW‐MS‐GCPW driven electrode for low‐cost and wide range application electro‐optic modulators
Authors: El‐Gibari Mohammed , Averty Dominique , Lupi Cyril , Li Hongwu , Toutain Serge 
Published: March 2010

AbstractElectro‐optic modulators are key components in high bit‐rate optical transmissions. Decreasing the manufacturing cost without damage on performances is one of the most challenging issues for such components. We demonstrate that the electro‐optic modulators based on polymer are compatible with high bandwidth requirements. Indeed, according to the results obtained by numerical simulation and partly validated by experiments, with the via‐free GCPW‐MS‐GCPW electrodes proposed and analyzed in this article, the (400 MHz–67 GHz) bandwidth is achievable with electro‐optic modulators based on suitable polymers. These encouraging results are very useful for low‐cost mass production of polymer‐based electro‐optic modulators for a wide range of applications: digital and analogue high bit‐rate transmissions.© 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1078–1082, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25112
UHF RFID near field reader antenna for item level applications
Authors: Kim Jeong‐Seok , Choi Won‐Kyu , Choi Gil‐Young 
Published: March 2010

AbstractA UHF band near‐field antenna using microstrip lines and stubs for tagging stacked tags in a smart table is presented. It is shown that a suitable near‐field reader antenna can be designed from signal lines, ground lines, and several stubs to generate coupled electric and magnetic fields. The proposed near‐field reader antenna satisfactorily operates in a UHF radio frequency identification (RFID) smart table, and the measurements show that the antenna is capable of detecting 200 stacked tags in a reading area of 200 mm × 190 mm and achieves a detection rate of 97% when the tags are stacked in a smart table. The proposed UHF RFID smart table is successfully implemented for casino chip management. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1116–1119, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25115
Robust full‐duplex ROF system
Authors: Thomas D. H. , Vilela de Faria G. , von der Weid J. P. 
Published: March 2010

AbstractWe present a simple and robust full‐duplex radio‐over‐fiber (ROF) system using two laser sources with efficient laser frequency stability control enlarging the reliability of the whole system with automatic operation. Error‐free operation was obtained at 52 and 155 Mb/s. The system was successfully tested for ASI/SDI‐coded digital TV transmission at 270 Mb/s. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1009–1013, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25120
Design of a planar ultra‐wideband miniature monopole antenna for wireless USB dongle devices
Authors: Chang Yu‐Chia , Chiu Chien‐Ching 
Published: March 2010

AbstractThis article proposes a 3.1–5 GHz ultra‐wideband antenna, defined by a −10 dB return loss.The simplified planar antenna structures, compact size, and low profile make it profitable to the application of the embedded antenna in wireless universal serial bus dongle devices. The slit shape on the monopole radiator is tuned for miniature antenna size. A parasitic stub on the ground is adopted to increase antenna bandwidth for achieving 3.1–5 GHz impedance bandwidth. To reduce manufacturing cost and practical fabrication, we also propose a simplified rectangular antenna structure. It is found that wideband characteristics of the simplified rectangular structure antenna are similar to that of semicircular base structure. Finally, the antenna prototypes are fabricated and the antenna characteristics are measured. The radiation patterns are omnidirectional in azimuth cut. Moreover, the S‐parameter of antenna characteristics has been measured. The consistency between the simulated results and the measurement results confirms the practicability of these techniques. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1013–1016, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25121
Dual‐band branch line coupler based on composite right‐/left‐handed transmission lines with series capacitors only
Authors: Park Jinsung , Lee Yongshik 
Published: March 2010

AbstractThis article demonstrates, for the first time, a dual‐band branch line coupler based on composite right‐/left‐handed transmission lines with series capacitors only.The complete elimination of shunt inductors provides a potential for the proposed CRLH transmission lines to be applicable to high frequencies, especially without via‐holes in microstrip lines. Experimental results are in excellent agreements with the simulated results. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1046–1048, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25123
Ultra‐wideband coplanar boat microstrip patch with modified ground plane by using electromagnetic band‐gap structure for wireless communication
Authors: Elsheakh Dalia N. , Elsadek Hala A. , Abdallah Esmat A. , Iskander Magdy , Elhenawy Hadia 
Published: March 2010

AbstractA new antenna structure using triangular patch alongside a small trapezoidal shape ground plane with proximity fed is proposed in this article. The proposed antenna design provides a bandwidth in the range from 2 < 35 GHz with band discontinuities. Improvement is done in antenna performance by using electromagnetic band‐gap (EBG) structure. First, dumb‐bell shapes as 2D‐EBG are etched in the feeding line. Second, embedded spiral artificial magnetic conductor with four arms to introduce sufficient inductive impedance is done. The resultant bandwidth increases to three times than the original bandwidth and reduces the antenna size as well as enhancing the antenna gain. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1159–1164, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25129
Novel broadband rectenna using printed monopole antenna and harmonic‐suppressed stub filter
Authors: Hong Tae‐Ui , Oh Kyoung‐Min , Lee Hyun‐Wook , Nam Hee , Yun Tae‐Soon , Lee Dae‐Sung , Hwang Hak‐In , Lee Jong‐Chul 
Published: March 2010

AbstractThis article reports a novel broadband rectifying antenna (rectenna) using the printed monopole antenna and the band‐pass stub band‐pass filter, which is designed in the microstrip line structure at 2.45 GHz for the wireless transmission of microwave power.We suggest a novel H‐shape printed monopole antenna with size reduction of the radiator and the ground plane using surface current distribution, and a broadband stub band‐pass filter with suppression of the second harmonic. The rectifying circuit with stub filter doesn't need additional area because it is fabricated on the ground plane, which is widened to acquire broadband characteristic of the monopole antenna. The RF‐to‐DC conversion efficiency of 66% is obtained by using a load resistor of 270 Ω at 2.45 GHz. Also, the conversion efficiency is maintained from 2 GHz to 3 GHz above 50%. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1194–1197, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25130
60 GHz high resistivity silicon on insulator interdigitated dipole antenna
Authors: Barakat M. H. , Delaveaud C. , Ndagijimana F. 
Published: March 2010

AbstractThe performance of a 60 GHz interdigitated dipole antenna integrated on SOI is described. The SOI substrate effect has been compensated by the introduction of an interdigitated structure. Good dipole matching impedance at 60 GHz over a bandwidth of 8% is obtained. Backside substrate metallization has been used to improve the radiation properties. A novel test method is used to measure the gain patterns of the dipole. The resulting measured radiation efficiency is 80% with a gain around 3 dBi at 60 GHz. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1197–1201, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25132
PO‐based characteristic basis finite element method (CBFEM‐PO)—A parallel, iteration‐free domain decomposition algorithm using perfectly matched layers for large‐scale electromagnetic scattering problems
Authors: Ozgun Ozlem , Mittra Raj , Kuzuoglu Mustafa 
Published: March 2010

AbstractIn this article, we introduce a new type of Characteristic Basis Finite Element Method (CBFEM), which is based on the concepts of Physical Optics (PO) and Perfectly Matched Layers (PMLs), for solving large‐scale electromagnetic scattering problems in a rigorous and efficient manner. This parallel and iteration‐free technique, called CBFEM‐PO, decomposes the computational domain into a number of subdomains, and generates three types of characteristic basis functions (CBFs) that are specially‐tailored to each individual subdomain. Of these, the first two types of CBFs are comprised of primary and secondary bases arising from the self‐interactions in each subdomain and mutual‐couplings between different subdomains, respectively. They are obtained by solving the localized problem in each subdomain, isolated by PML regions. The third‐type of CBFs are derived by using the PO fields for different incident angles, polarization, and frequency. Two important salutary features of the proposed technique are: considerable reduction in the matrix size, which makes it feasible to use direct solvers; and convenient parallelizability that enables us to decrease the overall computation time by utilizing parallel platforms. We present a number of representative examples to illustrate the versatility of the method in solving 3D electromagnetic scattering problems. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1053–1060, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25134
Parallel coupled CPW filters for spurious band suppression
Authors: Fernández‐Prieto Armando , Martel Jesús , Medina Francisco , Mesa Francisco 
Published: March 2010

AbstractModified coplanar waveguide (CPW) edge‐coupled band‐pass filters with floating conductor strips printed below the coupled‐line sections are proposed. These structures allow one to suppress the first undesired spurious passband associated with the nonhomogeneous nature of the dielectric in CPW structures. Also, tight coupling levels can be easily achieved. An optimization code based on a fast quasi‐TEM solver is used to optimize the dimensions of the filter sections, in such a way that final dimensions are obtained in less than 1 min. A couple of filters have been built and measured to illustrate the theory. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1094–1097, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25135
A compact and low‐loss LTCC diplexer with high‐band selectivity and high isolation for dual‐band applications
Authors: Kim Tae Wan , Lee Young Chul 
Published: March 2010

AbstractThis article presents a compact and low‐loss diplexer for dual‐band applications using a LTCC (low temperature co‐fired ceramic) multilayer technology. This diplexer is composed of the high‐pass filter (HPF) and low‐pass filter (LPF) in order to separate GSM (global system for mobile) and CDMA (code division multiple access) band. For enhancing band selectivity of the diplexer, a shunt capacitor and inductor are designed in the HPF and LPF, respectively. In addition, a transmission zero is designed at the stopband of the LPF using a shunt inductor for improving isolation characteristics. The diplexer is realized in a 6‐layer LTCC substrate with a relative dielectric constant of 7. The size of the fabricated diplexer including CPW pads is 3.45 × 4.0 × 0.7 mm3. A measured insertion loss (IL) and return loss (RL) of the GSM band are less than −0.54 dB and −10.50 dB, respectively. In the case of CDMA band, the IL of −1.13 dB and RL of below −6.16 dB are archived. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1134–1137, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25137
Compact and wideband PIFA for DCS/PCS/UMTS/WLAN communication system
Authors: Pang Jiang‐Yi , Xiao Shao‐Qiu , Chen Shi‐Tao , Wang Bing‐Zhong 
Published: March 2010

AbstractIn this article, a compact and wideband planar inverted‐F antenna is introduced.The bandwidths for s11 < −10 dB are up to 790 MHz (a fractional bandwidth of 38.2%) with bending a part of metal radiator down and notching a rectangle slot. Measured results show that the designed antenna can meet the requirements of the DCS/PCS/UMTS/WLAN communication system. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1097–1100, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25138
Intrinsic and extrinsic fiber Fabry‐Perot sensors for acoustic detection in liquids
Authors: Lima S. E. U. , Frazão O. , Farias R.G. , Araújo F. M. , Ferreira L. A. , Miranda V. , Santos J. L. 
Published: March 2010

AbstractThis article reports the development of two sensing head configurations based on extrinsic and intrinsic fiber Fabry‐Pérot interferometers for the detection of incipient faults in oil‐filled power transformers. The performances of the sensing heads are characterized and compared with the situations where it operates in air, water, and oil and promising results are obtained, which will allow the industrial development of practical solutions. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1129–1134, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25139
A CPW‐fed wideband spiral slot antenna with circular polarization
Authors: Wang Chien‐Jen 
Published: March 2010

AbstractA new design of broadband slot antenna with circular polarization is presented. The broadband characteristics are achieved using a coplanar‐waveguide (CPW)‐fed two‐arm spiral slot configuration. The spiral slot antenna and the feeding structure are fabricated on the same plane of the substrate so that the circuit process and the position alignment could be simplified. The improvement of circular polarization for the antenna is obtained mainly by an arc slot surrounding the spiral slots. The turn number of the spiral slots and the geometrical dimensions of the arc slot are varied in order to derive the better performance of the circular polarization. The measured impedance bandwidth of a S11< −10 dB ranges from 1.25 to 8 GHz and covers most of the commercial wireless communication systems, such as GPS, DCS, PCS, IMT‐2000, WLAN, and HiperLAN. The measured 3‐dB axial‐ratio bandwidth (ARBW) is 10.6% with respect to 1.605 GHz. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1204–1208, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25142
Analytical design of a half‐mode substrate integrated waveguide Wilkinson power divider
Authors: Suntives A. , Smith N. A. , Abhari R. 
Published: March 2010

AbstractThis article presents a new approach in designing half‐mode substrate integrated waveguide Wilkinson power dividers based on analytical relations. Even‐ and odd‐mode analysis is used to determine the required value of the branch resistance and optimize the power divider performance, namely the output ports' isolation. In this manner, the design process for this microwave component is simplified and expedited, while an excellent correlation with full‐wave simulations is maintained. Measurements of the fabricated prototype corroborate the calculated results and demonstrate a wide output‐port isolation bandwidth of 71%. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1066–1069, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25145
Design of a broadband microstrip crossover for ultra‐wideband applications
Authors: Kusiek A. , Marynowski W. , Mazur J. 
Published: March 2010

AbstractThis article presents the investigations of ultra‐wideband microstrip crossover. In the design procedure, the equivalent circuit of microstrip crossover is used. To improve parameters of the investigated structure, two configurations of compensating circuits are designed and examined. The numerical results are experimentally verified. A good agreement between simulation results and measured ones is obtained. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1100–1104, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25146
Simplified design of multilayered substrate‐integrated waveguide Riblet–Saad couplers
Authors: Labay Vladimir A. , Bornemann Jens 
Published: March 2010

AbstractA simplified design procedure for dual‐ and triple‐layered Riblet–Saad directional couplers in substrate‐integrated waveguide (SIW) technology is presented. Emphasis is placed on a design that considers ease of fabrication and includes interface ports such as microstrip‐to‐SIW transitions with straight, bent, and mitered microstrip lines. Designs are performed in an HFSS environment, which is verified by comparison with an independent field‐solver simulation. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1142–1144, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25149
A compact DVB‐H Marchand balun using vertically coupling CPW structure
Authors: Lee Han Lim , Kim Dong‐Zo , Lim Won‐Gyu , Lee Moon‐Que , Yu Jong‐Won 
Published: March 2010

AbstractA compact DVB‐H (digital video broadcasting—Handheld) Marchand balun using coplanar waveguide (CPW) coupling structure is presented.The proposed structure combines a double sided meandered CPW Marchand structure with lumped elements. Having the vertical coupling of meandered CPW Marchand structure, wide bandwidth for DVB‐H band (470–710 MHz) is achieved. Also, lumped elements are used to reduce the physical length of the coupling meandered lines. The proposed DVB‐H balun is fabricated on FR‐4 board and both simulated and measured results are presented to illustrate its performance. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1174–1177, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25150
Black Box Multigrid with coarsening by a factor of three
Authors: J. E. Dendy  , Moulton J. D. 
Published: March 2010

AbstractBlack Box Multigrid (BoxMG) is a robust variational multigrid solver for diffusion equations on logically structured grids. BoxMG standardly uses coarsening by a factor of two. It handles cell‐centered discretizations on logically rectangular grids by treating the cell‐centers as the unknowns to be coarsened. Such a strategy does not preserve the cell structure. That is, coarse‐grid cells are not the union of fine‐grid cells. In some applications, such as local grid refinement, it is desirable that the cell structure be preserved. In this paper, we develop a method that employs coarsening by a factor of three. It is a natural generalization of standard BoxMG, using operator‐induced interpolation (which approximately preserves the continuity of the normal flux), restriction as the transpose of interpolation, and Galerkin coarsening. In addition, we introduce a new colored block Gauss–Seidel scheme that is motivated by the form of the interpolation operator, dubbed ‘pattern’ relaxation. We present numerical results that demonstrate robustness of this method with respect to discontinuous diffusion coefficients, boundary conditions, and grid dimension. Published in 2010 by John Wiley & Sons, Ltd.
Flatness based trajectory planning for a semi‐linear hyperbolic system of first order p.d.e. modeling a tubular reactor
Authors: Woittennek Frank , Rudolph Joachim , Knüppel Torsten 
Published: March 2010

AbstractTrajectory planning and open loop control design for semi‐linear hyperbolic systems in one space dimension is considered. A “flatness based” method is introduced on an example of a convection dominated tubular reactor with heat exchanger. More generally, the method applies to boundary value problems that can be translated into Cauchy problems w.r.t. the spatial coordinate. (© 2009 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Feedforward control design for a semilinear wave equation
Authors: Wagner Marc Oliver , Meurer Thomas , Kugi Andreas 
Published: March 2010

AbstractThis paper presents a flatness‐based approach for the solution of the feedforward control problem for a boundary controlled semilinear wave equation. The solution to a given piecewise analytical desired output trajectory is shown to be piecewise analytical, which allows the application of a formal power series approach on suitable subregions in adequate coordinates. The subregions are determined by the characteristic curves of the system passing through the non‐analyticity points of the desired trajectory. Convergence of the solution is demonstrated and simulation results are given for some set of parameters. (© 2009 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Trajectory planning for boundary controlled parabolic PDEs with varying parameters defined on a parallelepiped
Authors: Meurer Thomas , Kugi Andreas 
Published: March 2010

AbstractThe trajectory planning and feedforward tracking control problem is considered for a boundary controlled diffusion‐reaction system with a spatially and time varying reaction parameter defined on a 3‐dimensional parallelepiped. For this, an implicit state and input parametrization in terms of a basic output via a Volterra‐type integral equation with operator kernel is determined, which is solved recursively by means of a series ansatz. The absolute and uniform convergence of the resulting series is verified by restricting the reaction parameter and the basic output to a certain but broad Gevrey class. Hence, assigning an admissible desired trajectory for the basic output directly yields the respective feedforward control, which is required to realize a desired spatio‐temporal transition path. (© 2009 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Controllability of distributed parameter systems: Illustrative examples for an algebraic approach.
Authors: Woittennek Frank , Mounier Hugues 
Published: March 2010

AbstractBoundary coupled partial differential equations of second order are seen as convolutional systems over a Bézout domain RQ of particular distributions and ultradistributions with compact support. For two simple examples this property of RQ is employed in order two find a flat output, i.e., a variable that allows the parametrization of the system trajectories in an appropriate solution space. (© 2009 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Analysis and assessment of foot posture in children with flat feet
Authors: Pauk J. 
Published: March 2010

AbstractThe paper presents the methods for foot assessment such as: X‐ray, graphic contour testing, ground reaction force, and pressure distribution. Some of this methods can be used just in static. The platforms with sensors are very good tools in assessment foot posture during human walking. The evaluation was carried on 20 typical subjects and 60 children with foot deformities. GRF parameters, compared to clinical radiographic measurement demonstrated generally a good correlation. The analysis of fround reaction force and pressure distribution represent a strong tool to validate clinical tests and can be used for screening, diagnosis and treatment choice in clinical practice. (© 2009 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)