bluuebunny/crossref_metadata_2025_split huggingface dataset:
An algebraic domain decomposition algorithm for the vector finite‐element analysis of 3D electromagnetic field problems
Authors: Chen R. S. , Yung Edward K. N. , Chan C. H. , Wang D. X. , Jin J. M. 
Published: September 2002

AbstractThis Letter, proposes an algebraic domain decomposition algorithm (ADDA) to solve large sparse linear systems derived from the vector finite‐element method (FEM) for 3D electromagnetic field problems. The proposed method segments the problem into several smaller pieces, solves each subproblem by direct methods, and then reassembles the subproblem solutions together to get the global result. Block LU factorization and multifrontal method are applied to solve each subproblem for the generation of the reduced system, and iterative methods are applied to solve the reduced system. It is shown that if combined with ADDA, biconjugate gradient method (BCG) converges more rapidly than the conjugate gradient method (CG), and both of them are faster than the conventional CG method. The simulation results demonstrate that the proposed algorithm can efficiently solve large and sparse linear equations arising from the finite‐element method for the electromagnetic problems involving complex media such as perfectly matched layers (PMLs), which often make the linear equation ill‐conditioned. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 414–417, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10480
Numerical analysis of optical waveguides with the use of Fourier‐series expansion method combined with perfectly matched layer
Authors: Yasumoto Kiyotoshi , Watanabe Koki , Ishihara Junya 
Published: September 2002

AbstractA numerical approach for transition problems in optical waveguides is presented, with the use of the Fourier‐series expansion method combined with the absorbing boundary condition by a perfectly matched layer (PML). The optical propagation along a transition is described by a simple matrix algebra. The numerical examples demonstrate that the radiation modes with wider propagation angle are strongly attenuated in the presence of PML, and hence unwanted interference of the boundary‐reflected radiation field to the guided wave field is suppressed. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 422–426, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10482
Large‐signal modeling of frequency‐dispersion effects in submicron MOSFET devices
Authors: Toner B. , Fusco V. F. 
Published: September 2002

AbstractIn this Letter a large‐signal model for the MOSFET will be presented, along with the parameter extraction for the model using large‐signal time‐domain waveforms. The dc/ac hybrid model described accounts for the discrepancy between dc and large‐signal rf extracted equivalent circuit conductance and transconductance parameters. In addition, the dynamic nature of the modeling process directly characterizes other phenomena associated with high‐power operation such as self‐heating effects. Full verification of the model is provided for an 80 μm/0.18 μm MOSFET. An improvement in the performance of the model over traditional quasi‐static models at rf whilst maintaining the accuracy of the dc model is demonstrated. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 429–432, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10485
On the influence of electron‐beam parameters on TWT small‐signal gain
Authors: D'Agostino Stefano , Paoloni Claudio 
Published: September 2002

AbstractThe electron beam is one of the main components in traveling‐wave tubes (TWTs). A study on the influence of the parameters related to the electron beam on small‐signal gain of TWTs is proposed. In particular, the effect of the variations of electron‐beam voltage, the perveance of the electron gun, and electron beam radius are investigated. A five‐section TWT was considered in the study. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 433–434, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10486
Fast analysis of scattering by arbitrarily shaped three‐dimensional objects using the precorrected‐FFT method
Authors: Nie Xiaochun , Li Le‐Wei , Yuan Ning , Yeo Tat Soon 
Published: September 2002

AbstractThis Letter presents a fast solution to the electric‐field integral equation (EFIE) for large, three‐dimensional, arbitrarily shaped objects. The EFIE is discretized by the method of moments and the precorrected‐FFT method is then used to accelerate the matrix–vector multiplications in iterations. The resulting algorithm leads to a great reduction in memory requirement and execution time and can be modified to fit a wide variety of systems with different Green's functions without excessive effort. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 438–442, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10488
A dual‐band bidirectional multilevel monopole antenna
Authors: Soler Jordi , Puente Carles , Puerto Alberto 
Published: September 2002

AbstractA dual‐band monopole antenna that permits tailoring the shape of the radiation patterns to provide bidirectional coverage is presented. The antenna provides an optimum input return loss and could be used in those applications where a bidirectional pattern is required. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 445–448, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10490
An extension of the two‐slot radiation model to stacked patches with infinite and finite ground plane
Authors: Rajo‐Iglesias Eva , Vázquez‐Roy José‐Luis , Segovia‐Vargas Daniel , González‐Posadas Vicente , Martín‐Pascual Carlos 
Published: September 2002

AbstractThis Letter presents a new radiation model for stacked‐patch antennas. The model is based on the two‐slot model and consists of a four‐ or six‐element array, depending on the supposition of infinite ground plane. The parameters that can be extracted from this model, such as coupling coefficient, surface‐wave coefficients, and phases are very useful in stacked‐patch design. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 448–451, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10491
Comparison of 2D particle‐in‐cell simulation with 1D nonlinear theory of helix traveling‐wave tubes
Authors: Jung Sun‐Shin , Soukhov Andrei V. , Park Gun‐Sik 
Published: September 2002

AbstractTwo‐dimensional (2D) particle‐in‐cell (PIC) simulations, using MAGIC code, have been performed for wide‐band helix traveling‐wave tubes (TWTs) in a large‐signal regime. Fundamental and second‐harmonic power calculated over a 1.5‐octave frequency range of 6–18 GHz were compared and found to be in good agreement with those obtained by one‐dimensional (1D) nonlinear theory. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 451–454, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10492
Novel photonic crystal waveguide in microwave printed‐circuit technology
Authors: Falcone Francisco , Lopetegi Txema , Laso Miguel A. G. , Sorolla Mario 
Published: September 2002

AbstractIn this Letter a novel type of waveguide based on a photonic crystal and implemented in microwave printed‐circuit technology is proposed. The novel waveguide is obtained by introducing a line defect in a 2D photonic crystal placed inside a parallel‐plate waveguide. The resulting structure supports guided modes that propagate along the line defect. Simulation and measurement results confirming the existence of a low‐loss waveguiding band are presented. The novel type of planar waveguide has a quasi‐TEM fundamental mode and is compatible with the widely employed microstrip technology, but because of its unique configuration it does not suffer from some problems common to planar technologies like radiation losses or surface‐wave mode excitation. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 462–466, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10496
Effects of the adjacent channels on IP3 of RF amplifiers
Authors: Ma Jian‐Guo 
Published: September 2002

AbstractIn this Letter the effects of the adjacent channels on the IP3 and the 1‐dB compression point of a RF amplifier are investigated with the use of a three‐tone test instead of single‐tone and two‐tone tests in the conventional 1‐dB and IP3 investigations. The results show that the 1‐dB point and the IP3 have been lowered because of the adjacent channel signals. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 1–3, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10499
A beam launching method for propagation modeling in multipath contexts
Authors: Tahri R. , Letrou C. , Hanna V. Fouad 
Published: September 2002

AbstractA new technique for propagation modeling in multipath contexts is proposed as a fast and sufficiently precise alternative to ray‐based techniques. This technique is based on frame decomposition of source fields into a set of Gaussian beams. Its validity is demonstrated in the case of wave propagation in a rectangular metallic waveguide. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 6–10, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10501
Application of a 2D‐CFDTD algorithm to the analysis of photonic crystal fibers (PCFs)
Authors: Zhu Yanjie , Chen Yinchao , Huray Paul , Dong Xiaopeng 
Published: September 2002

AbstractThis research applies an efficient two‐dimensional cylindrical finite‐difference–time‐domain (2D‐CFDTD) algorithm implemented on the transverse plane of a guided‐wave structure to analyze a photonic crystal fiber (PCF) structure. An unsplit anisotropic perfectly matched layer (APML) is used for mesh termination along the radial direction of the PCF. The propagation characteristics of the PCF are analyzed, and excellent agreement is observed between the results derived in this research and those available in the literature. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 10–14, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10502
Effect of slot geometry on linearly polarized radial line slot array characteristics
Authors: Subbarao B. , Fusco V. F. 
Published: September 2002

AbstractThis Letter demonstrates low cross polarization with improved return loss and bandwidth for a single concentric ring linearly polarized radial line slot array (LPRLSA) operating at 10.65 GHz, gain 14 dB. This was acheived by narrowing the slot width and optimizing the placement of each slot pair relative to the edge of a short‐circuited radial waveguide. Measured return loss and cross polarization levels were better than −20 dB over a 10% bandwidth (cf. 3.5% previously reported) at VSWR of 2. The measured and simulated fa‐ field patterns are presented. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 14–16, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10503
The effect of grating‐position deviation and fiber dispersion in the fiber‐optic–CDMA network with the FBG encoder/decoder for incoherent 2D coding
Authors: Wang X. , Chan K.T. 
Published: September 2002

AbstractThe effect of grating‐position deviation (GPD) and fiber dispersion in a fiber‐optic–CDMA network with a FBG encoder/decoder for incoherent 2D coding are studied here. For error‐free transmission, the GPD‐caused maximum optical pulse‐position deviation (PPD) must be below Δm, and the transmission distance must be below Lm. A modified encoder/decoder configuration is proposed to compensate for the fiber dispersion. With this proposed encoder/decoder, the user's distances in a network can be improved to L ± Lm. Error‐free transmission has been achieved through 9.5‐km SMF in the experiment with this design. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 16–19, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10504
Mixed coupling structure for the cross coupling of comb‐line filters
Authors: Kim Byungwook , Kim Young‐Soo 
Published: September 2002

AbstractA mixed coupling structure is proposed for the cross coupling of a comb‐line filter. The proposed structure consists of an electric coupling probe and a magnetic coupling window, and the coupling required for the cross coupling of a cross‐coupled filter can be achieved with much easier tuning capability than the structure with only an electric probe. A four‐pole comb‐line filter is designed and fabricated with the use of the proposed structure, and showed good filter response. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 20–23, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10505
Quasi‐static parameters, low‐frequency solutions, and full‐wave solutions of a single‐layered via
Authors: Li Qin , Tsang Leung , Chen Houfei 
Published: September 2002

AbstractThe problem of a single‐layered via through two parallel ground planes is studied. The problem is decomposed into the exterior problem and the interior problem. For each problem, the quasi‐static solution, the full‐wave solution, and the low‐frequency solution are studied. The exterior solutions and the interior solutions are then combined to give the overall characteristics. Different combinations can be made. In solving the interior part with the quasi‐static approach, the aperture of the via hole is replaced by the equivalent source. The Green's function between two PEC planes is used to form the surface integral equation, and the MoM is used to extract the capacitance. The extracted quasi‐static results are compared with those from the low‐frequency and full‐wave solutions. It is shown that the capacitance from the full‐wave approach is very weakly frequency dependent and compares well with that from the quasi‐static approach at the frequency range of interest. The inductance of the interior part is found to be infinity with the magneto‐static approach. Thus the quasi‐static solution cannot be used for the interior problem to find the inductance. On the other hand, the inductance based on the full‐wave solution is strongly frequency dependent. It is also shown in this article that the combination of the quasi‐static solution for the exterior problem and the full wave for the interior problem gives good performance in terms of both accuracy and CPU requirements. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 34–40, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10508
FET power combining with the use of the balanced single‐ended dual‐fed distributed amplifier approach
Authors: Eccleston K. W. , Kyaw O. 
Published: September 2002

AbstractA balanced amplifier employing two identical single‐ended dual‐fed distributed amplifiers is demonstrated to be a viable approach for combining FET output power. The FETs are spaced 180° to ensure all FETs have identical load lines, which are chosen optimally. The configuration uses all FET output power and has good port match. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 42–45, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10510
Dual‐feeding microstrip antenna with high isolation
Authors: Kim Hyungrak , Kwon Jonghun , Yoon Youngjoong , Yoon Jaeseung , Jeon Soonik 
Published: September 2002

AbstractIn this Letter, a dual‐feeding structure with microstrip and an H‐shaped aperture feeding for a microstrip antenna is proposed to achieve high isolation with high gain, easy feeding, and few layers. The measured isolations of the proposed single and 1 × 4‐array antenna along the E plane of the aperture feeding are less than −49 and −48 dB, respectively. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 45–47, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10511
Wire media with negative effective permittivity: A quasi‐static model
Authors: Maslovski S. I. , Tretyakov S. A. , Belov P. A. 
Published: September 2002

AbstractIn this Letter artificial media formed by dense arrays of parallel conducting wires are considered. A simple analytical model for the effective permittivity is derived from quasi‐static considerations. The result gives a formula for the permittivity in terms of the geometrical parameters and the frequency. The analysis covers lossy and loaded wires as well. The phenomena that lead to negative permittivity values are discussed. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 47–51, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10512
Extraction of rate‐equation parameters from optical modal gain measurements for multiple‐quantum‐well semiconductor lasers
Authors: Wartak M. S. , Weetman P. , Alajoki T. , Aikio J. , Heikkinen V. 
Published: September 2002

AbstractRate equations for multiple‐quantum‐well (MQW) laser structure with carrier transport effects and advanced models of optical modal gain were used to extract relevant laser's parameters used in simulations. The many‐body effects of bandgap renormalization, Coulombic scattering interactions, and a non‐Markovian distribution were included in gain calculations. The importance of carrier leakage for that particular structure is indicated. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 55–56, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10514
Picosecond pulse generation for visible semiconductor laser operating at 650‐nm wavelength with the use of the gain‐switching technique
Authors: Oh Kwang H. , Hwang N. , Koh J. S. , Kim Dug Y. 
Published: September 2002

AbstractVarious characteristics of a gain‐switched InGaAlP Fabry–Perot semiconductor laser operating with a center wavelength of 650 nm for short‐distance ultra‐fast optical transmission applications. The optimum gain switching conditions are studied in detail with this semiconductor laser. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 65–67, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10517
Operating characteristics of an optical filter in metallic photonic bandgap materials
Authors: Srivastava Sanjeev K. , Ojha S. P. 
Published: September 2002

AbstractIn this Letter a new analysis of an optical filter using a metallic photonic bandgap material on the microscopic scale is reported. The proposed filter is capable of working over a wide range of the electromagnetic spectrum and the idea is based on the famous Kronig–Penny model in the solid state. The periodic structure consisting of different conducting materials and dielectrics (air) are considered. The structure is also able to pass the light emitted by a He–Ne laser source by choosing the appropriate values of the controlling parameters, and thus this may act as an efficient monochromator. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 68–71, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10518
Waveguide‐fed planar antennas for millimeter waveband
Authors: Marzolf Eric , Drissi M'hamed 
Published: September 2002

AbstractPlanar antenna structures for broadband applications in the millimeter‐wave band at 60 GHz are investigated experimentally. Feeding through a waveguide is used to achieve high performances such as wide‐bandwidth operation and to enable a choice of designs by means of a low‐cost technological process. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 71–73, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10519
Narrow‐linewidth wavelength‐tunable fiber laser controlled by intracavity feedback‐injected Fabry–Perot laser diode
Authors: Lin Gong‐Ru 
Published: September 2002

AbstractNarrow‐linewidth and wavelength‐tunable operation of erbium‐doped fiber laser (EDFL) by optically feedback‐injecting an intracavity Fabry–Perot laser‐diode (FPLD) driven at nearly threshold condition is demonstrated. An optimized lasing linewidth and a side‐mode suppressing ratio of 0.1 nm and >27 dB are obtained, respectively. Linear wavelength tuning of >4 nm by adjusting temperature of FPLD from 20 to 45 °C is reported. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 73–75, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10520
Incidence of anemia in pediatric cancer patients in Europe: Results of a large, international survey
Authors: Michon Jean 
Published: September 2002

AbstractBackgroundAnemia occurs frequently in children with cancer, but there is little information quantifying the incidence of anemia or treatment. A survey was conducted in 1998 in Europe by The Research Partnership with the objective of determining the incidence of anemia, identifying the hemoglobin triggers that initiated anemia treatment, and the current anemia treatment options available to clinicians.ProcedureThe survey was conducted in the 10 largest pediatric oncology centers each in France, Germany, Italy, Spain, and the UK, and in the 8 largest centers in both Belgium and The Netherlands. Telephone interviews with the most senior physician available in the institution were used to collect data, which included the numbers of patients treated or under follow‐up, cancer types, and treatment practices for anemia.ResultsData were collected for 25,093 patients. Over 80% of patients were anemic (WHO: hemoglobin ≤ 11 g/dL; EORTC: hemoglobin ≤ 12 g/dL) regardless of tumor type; 97% of patients with leukemia, the most prevalent type of cancer (34% of the total population), were anemic. Decreases in hemoglobin levels to between 5.5 and 8.0 g/dL were the most common factor that precipitated anemia treatment. Treatment was almost exclusively blood transfusion; less than 5% of patients received drug treatment (which consisted mostly of folic acid or iron). Very few patients received recombinant human erythropoietin (rHuEPO, epoetin alfa) to treat anemia.ConclusionsIn general, clinicians were not able to give advantages or disadvantages of epoetin alfa as a treatment option for treating anemia in children with cancer, which reflects the limited knowledge of and experience with this agent. Med Pediatr Oncol 2002;39:448–450. © 2002 Wiley‐Liss, Inc.
Is epoetin alfa a treatment option for chemotherapy‐related anemia in children?
Authors: Büyükpamukçu Münevver , Varan Ali , Kutluk Tezer , Akyüz Canan 
Published: September 2002

AbstractBackgroundThe efficacy and safety of epoetin alfa in ameliorating cancer‐ or chemotherapy‐related anemia and reducing red blood cell (RBC) transfusion requirements have been demonstrated in numerous trials in adult patients. However, limited information is available about recombinant human erythropoietin (rHuEPO, epoetin alfa) as a treatment option in pediatric cancer patients.ProcedureTo gain more information about the efficacy and safety of epoetin alfa in the treatment of chemotherapy‐induced anemia in children with solid tumors receiving either platinum‐ or nonplatinum‐containing chemotherapy, an 8‐week randomized trial was conducted. Epoetin alfa 150 IU/kg was given 3 times a week for 8 weeks to 17 patients; 17 control patients received standard of care.ResultsTransfusions, administered if the hemoglobin (Hb) level dropped to below 6 g/dL, were necessary for only one patient in the epoetin alfa group, as compared with eight patients in the control group (change in Hb from 8.5–10.21 g/dL in the epoetin alfa group vs. 8.48–8.41 g/dL in the control group).ConclusionsThe data from this study suggest that this dosing regimen of epoetin alfa is effective and safe in pediatric cancer patients with chemotherapy‐related anemia. Further studies with epoetin alfa in more children with different chemotherapy regimens are needed. Med Pediatr Oncol 2002;39:455–458. © 2002 Wiley‐Liss, Inc.