bluuebunny/crossref_metadata_2025_split huggingface dataset:
Microwave noise performance of metamorphic InP/In0.53Ga0.47As/InP DHBT on GaAs substrates
Authors: Xiong Yong Zhong , Ng Geok‐Ing , Wang Hong , Fu Jeffrey S. 
Published: August 2002

AbstractThe microwave noise performances of metamorphic (MM) InP/In0.53Ga0.47As/InP double‐heterojunction bipolar transistors (DHBTs) on GaAs substrate are investigated for the first time. The noise figures and associated gains of the device with an emitter size of 5 × 5 μm2are studied in the frequency range of 2–10 GHz. The variations of minimum noise figure at different collector currents are presented. At 2 GHz, the best minimum noise figure (FMIN)of 2.1 dB with an associated gain(GASS) of 12.7 dB have been achieved atVCE= 1.5 V andIC= 0.3 mA (1.2 kA/cm2). For comparable size and current density, these results show noise performance comparable to those of reported lattice‐matched InP HBT at lower frequency (∼2 GHz).© 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 33: 306–308, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10303
Computation of radar cross section of jet engine inlets
Authors: Liu Jian , Dunn Eric , Baldensperger Pierre , Jin Jian‐Ming 
Published: August 2002

AbstractThe finite element‐boundary integral (FE‐BI) method was used to calculate the radar cross section (RCS) of jet engine inlet geometries. Comparisons of numerical results with measurements are shown to demonstrate the capability of the method. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 33: 322–325, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10309
Compact dual‐frequency PIFA with a chip‐inductor‐loaded rectangular spiral strip
Authors: Yeh Shih‐Huang , Wong Kin‐Lu 
Published: August 2002

AbstractBy loading a chip inductor of suitable inductance (about 12 nH or less) to a planar inverted‐F antenna (PIFA) with a shorted rectangular spiral strip, the frequency ratio of the antenna's first two resonant frequencies can be controlled, which makes dual‐frequency operation with a desired frequency ratio easy to achieve. In addition, with the use of a shorted rectangular spiral strip, the proposed PIFA, has compact dimensions for a fixed dual‐frequency operation. Design examples of the proposed PIFA with a compact size of 7.2 × 10 × 26 mm3 to achieve dual‐frequency operation at about 900 and 1800 MHz are presented. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 33: 394–397, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10333
Distributed sources on coplanar waveguides: Application to photomixers for THz local oscillators
Authors: Pasqualini Davide , Neto Andrea , Wyss Rolf A. 
Published: August 2002

AbstractAn electromagnetic model and a design of a photomixer‐based local oscillator for THz frequencies is presented. The theoretical investigation is on the nature of the fields excited in the coplanar waveguide (CPW) by impressed distributed sources. On this basis a CPW and antenna design is presented to optimize the radiated output power given the photoinduced rf currents. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 33: 430–435, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10342
Influence of randomly varying birefringence on dark soliton transmission and its suppression
Authors: Li Hong , Huang Dexiu 
Published: August 2002

AbstractThe influence of randomly varying birefringence on dark soliton transmission is investigated by numerical simulation. The results show that randomly varying birefringence leads to a soliton frequency shift, causes radiation waves, and disrupts the stability of dark soliton transmission. The splitting of a soliton pulse may appear because of the strong randomly varying birefringence. Nonlinear gain can be used to effectively suppress the influence. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 107–109, 2001.
Optical time‐spreading/frequency‐hopping differential OOK–CDMA system
Authors: Wan Sheng Peng , Hu Yu 
Published: August 2002

AbstractA new optical time‐spreading/frequency‐hopping differential CDMA (TS/FH CDMA) system is proposed in this paper. It uses new codes called prime/OOC codes as address codes. Fast optical frequency hopping and large capacity can be implemented with the system. By assigning two orthogonal codes for one user, and using these two codes to encode 1 and 0, respectively, the receiver can use differential detection. If they are balanced well between the 1‐branch and 0‐branch, the proposed system can effectively abate multiaccess interference (MAI), background noise, detector noise such as dark current, leakage current, and thermal noise, etc. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 125–128, 2001.
An accurate computation of Green's functions for multilayered media in the near‐field region
Authors: Abdelmageed Alaa K. , Mohsen Adel A. K. 
Published: August 2002

AbstractThe discrete complex image method is one of the most efficient techniques used to evaluate the Green's functions of multilayered media. The usual extraction of surface waves may limit the validity of this method in the near‐field region. The aim of this work is to handle this problem such that the representation is valid for all field regions. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 130–131, 2001.
Conical dielectric resonator antennas excited by a coaxial probe
Authors: Kishk Ahmed A. , Glisson A. W. , Yin Yan 
Published: August 2002

AbstractDielectric resonator antennas of conical shapes are experimentally examined. The dielectric cone resides above a ground plane, and is excited by a coaxial probe. Two configurations of the cone are tested: one with the wide base placed on the ground plane, and the other with the cone inverted on the ground plane. Results show that the inverted cone achieves a wider bandwidth. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 160–161, 2001.
Low‐loss wideband microwave coaxial bias T
Authors: Möttönen V. S. , Piironen P. , Räisänen A. V. 
Published: August 2002

AbstractA low‐loss and well‐matched wideband microwave coaxial bias T is presented. A simple structure makes the bias T easy and low cost to design and fabricate. Test results demonstrate the excellent performance of the bias T. The measured return loss is better than 30 dB, and the insertion loss is close to 0.1 dB over awide frequency range. The 0.5 dB insertion loss bandwidth is 3–16 GHz. Furthermore, the RF isolation is more than 30 dB. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 236–238, 2001.
Application of adaptive basis functions for a diagonal moment‐matrix solution of two‐dimensional field problems—TE case
Authors: Waller Marsellas L. , Rao Sadasiva M. 
Published: August 2002

AbstractIn this work, we present the application of specially constructed adaptive basis functions to generate a diagonal matrix in the method‐of‐moments solution procedure for the calculation of a scattered electromagnetic field from arbitrarily shaped two‐dimensional cylinders excited by a transverse electric incident electromagnetic wave. Several numerical examples are also presented to validate the new method. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 270–273, 2001.
Simplified calculations on some common passive microwave networks
Authors: Hallbjörner Paul 
Published: August 2002

AbstractCalculating the required line impedances for a specified performance on passive microwave networks like directional couplers and power dividers/combiners is a well‐known problem. A simple method is presented that uses the net power flow in the transmission lines of the network, together with power conservation at the intersections. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 285–288, 2001.
A comparison of dual‐band spur‐line printed antennas for handheld terminals
Authors: Martínez‐González Antonio , Sánchez‐Aguilar Ma. Angeles , Martínez‐Vazquez Marta , Sánchez‐Hernández David 
Published: August 2002

AbstractRecent breakthroughs in mobile phone technology are focusing on new techniques that allow the compact integration of dual‐band printed antennas into handsets with an increase in their inherent narrow bandwidth. In this letter, novel rectangular, circular, triangular, hexagonal, and bow‐tie‐shaped spur‐line dual‐band printed structures have been designed, measured, and compared. Although a second resonant frequency is obtained, it has been clearly made evident that spur‐line filter techniques are unable to obtain broad‐bandwidth elements, unless they can be combined with other methods. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 205–207, 2001.
A push–pull digital optical switch (DOS) in polymer using truncated‐structural X‐branches (TSXB)
Authors: Pandit M. K. , Chan H. P. , Chiang K. S. , Ghosh S. , Das A. K. 
Published: August 2002

AbstractWe report the design and simulation performance of a digital push–pull switch based on a wide‐angle, asymmetric X‐junction that we recently proposed (truncated‐structural X‐branch). At a full‐branching angle of 1.2°, the crosstalk and (straight‐port) transmission at the zero‐voltage state were −19 and −0.92 dB, respectively. In the switched state, they are −17.45 and −1.06 dB, respectively. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 208–211, 2001.
Compact pentagon microstrip antenna with circular polarization
Authors: Chen Horng‐Dean , Chen Wen‐Shyang 
Published: August 2002

AbstractBy embedding a group of four bent slots in the equilateral‐pentagon patch and introducing a peripheral cut at the patch boundary, a compact pentagon microstrip antenna with circularly polarized (CP) operation can be implemented using a probe feed. Results have been obtained that, for a given operation frequency, the antenna size reduction of the proposed design can be as large as 41% as compared to the regular‐size CP equilateral‐pentagon microstrip antenna. Details of the design considerations are described, and measured CP characteristics are presented. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 370–372, 2001.
Dual‐baseband and RF modulation scheme for Gbit/s heterogeneous fiber–wireless access networks
Authors: Martinez A. , Marti J. , Polo V. 
Published: August 2002

AbstractA dual‐modulation scheme to simultaneously transmit broadband signals on both baseband (BB) and millimeter‐wave RF carriers over optical fiber links is proposed and demonstrated. The key parameters of this technique are optimized for achieving the best performance in Gbit/s wireless millimeter‐wave fiber networks. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 372–374, 2001.
A simplified analog group delay equalizer and its performance for point‐to‐point cochannel radio relay system applications
Authors: Suh Kyoung‐Whoan 
Published: August 2002

AbstractThe implementation of a simplified analog group delay equalizer is presented for a high‐capacity SDH radio relay system. It provides good performance in terms of simple hardware and easy tuning, and the measured results are in good agreement with the simulated ones. To suggest practical applications, experimental results are illustrated here for a cochannel 64‐QAM radio relay system. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 397–400, 2001.
Propagation of power through highly bent parabolic cylindrical waveguides
Authors: Choudhury P. K. 
Published: August 2002

AbstractA rigorous analytical estimation is made of the propagation of power through a highly bent step‐index parabolic cylindrical waveguide (PCW), the bending being across the direction of electromagnetic (EM) wave propagation. The scalar field approximation is employed for the analytical treatment. The general expression for power in the waveguide core is derived under the condition of vanishing refractive‐index (RI) difference of the guide. The power patterns are shown for two different waveguide dimensions, and corresponding to different azimuthal modal indexes. The presented analysis is rigorous in the sense that no approximation is used to determine the representative functions for fields. It is found that an almost equal amount of power is carried by the bunched modes in thinner PCWs, and this feature affects guides having a higher thickness where the modes are less tightly bunched together. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 407–410, 2001.
Geometrical classifications of 0<K<1 and −1<K<0 for conditionally stable amplifiers
Authors: Meng C. C. , Ni H. Y. 
Published: August 2002

AbstractThe geometrical interpretation of 0<K<1 and −1<K<0 for conditionally stable (|K|<1) amplifiers is identified on the Smith chart with the help of B‐, D‐, and E‐factors. A simultaneous conjugate match is impossible for conditionally stable designs, but a conditionally stable amplifier with 0<K<1 can be designed with single‐sided matching. There are totally eight geometrical situations for conditional stable amplifiers in terms of K‐, B‐, D‐, and E‐factors. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 31: 18–20, 2001.
Cross‐ridge trough rectangular waveguide
Authors: Klymyshyn David M. , Qiu Dai , Pramanick Protap 
Published: August 2002

AbstractA new ridge trough rectangular waveguide loaded with a horizontal “cross” ridge is proposed and analyzed using the finite‐element method. Analysis predicts a dramatic increase in the fundamental‐mode cutoff wavelength performance and high bandwidth. The waveguide is attractive for emerging microwave and millimeter‐wave applications requiring highly integrated, compact structures. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 31: 20–23, 2001.
Regular circular and compact semicircular patch antennas with a T‐probe feeding
Authors: Guo Y. X. , Luk K. M. , Lee K. F. 
Published: August 2002

AbstractWideband T‐probe proximity‐fed regular circular and compact semicircular patch antennas are proposed in this paper. For the regular circular patch antenna, using a foam layer of thickness ∼0.13λ0 as a supported substrate, an impedance bandwidth of 35% and a gain of over 8.0 dBi have been obtained. For the compact semicircular patch antenna, an impedance bandwidth of 56% and a gain of over 5.4 dBi are achieved with the same substrate thickness. The far‐field patterns are stable across the passband. Experimental and computed results based on the finite‐difference time‐domain method are provided. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 31: 68–71, 2001.
Analysis of switching performance of the semiconductor optical amplifier–Mach–Zehnder interferometer based all‐optical add/drop multiplexer
Authors: Yongpeng Zhao , Peida Ye 
Published: August 2002

AbstractThe extinction ratio, switching contrast, and amplitude modulation (AM) characteristics of a semiconductor optical amplifier (SOA) based Mach–Zehnder interferometer (MZI) as an all‐optical add–drop multiplexer (AO–ADM) are analyzed. It shows that the switching performance can be improved by optimizing the splitting ratio of the couplers and the relative small‐signal gain of the two SOAs. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 31: 77–81, 2001.
A phase II study of homoharringtonine for the treatment of children with refractory or recurrent acute myelogenous leukemia: A pediatric oncology group study
Authors: Bell Beverly A. , Chang Myron N. , Weinstein Howard J. 
Published: August 2002

AbstractBackgroundHomoharringtonine (HHT) is a plant alkaloid that is derived from a Chinese evergreen tree. Its mechanism of action is thought to be by inhibition of protein, DNA, and RNA synthesis by inhibition of chain initiation. The treatment of acute myelogenous leukemia (AML) in children, has been hampered by few new effective agents developed in the past 30 years. Significant numbers of children still die of this disease. The purpose of this study is to evaluate the efficacy and toxicity of HHT for the therapy of refractory AML in children.ProcedurePatients entered the study and were treated with HHT 7mg/m2/day for 10 days. The cycles could be repeated every 21 days depending on recovery from myelosuppression.ResultsThirty‐seven patients entered the study, with twenty‐eight evaluable for response. Complete response was obtained in four and a partial response in one (response rate 5/28 = 18%). Significant toxicities included prolonged severe myelosuppression in all responsive patients and neuropathogenic pain in two patients. The median duration of response was 62 days with a range of 28–126 days.ConclusionsHHT has activity against chemotherapy resistant AML in children, with tolerable toxicity. This agent warrants further clinical evaluation in combination with other agents or perhaps biologic response modifiers which will hopefully lead to useful therapeutic options. Med Pediatr Oncol 2001;37:103–107. © 2001 Wiley‐Liss, Inc.
Delayed nausea and vomiting in children receiving antineoplastics
Authors: Dupuis L. Lee , Lau Robert , Greenberg Mark L. 
Published: August 2002

AbstractBackgroundThe nature and prevalence of delayed antineoplastic‐induced nausea and vomiting have not been well‐described in children. This study describes the extent of delayed nausea and vomiting in children receiving antineoplastic agents as well as the drug therapies initiated in an attempt to prevent or manage it.ProcedureAll children receiving antineoplastics were eligible for study entry. The date and time of each emetic episode were recorded on each day antineoplastics were given and for 3 days thereafter. Nausea was self‐assessed daily by children who were older than 3 years and were not developmentally delayed. Diet was also assessed daily. The emetic response, median nausea rating and median diet achieved were described.ResultsThe emetic response of 124 children who received 174 antineoplastic cycles was evaluated. Most cycles (137/174;79%) were not associated with delayed vomiting. Cycles which included cisplatin, carboplatin, or cyclophosphamide; involved antineoplastic therapy given over 2 or more consecutive days; or were accompanied by vomiting during the acute phase were associated with a significantly higher incidence of delayed vomiting. Moderate to severe nausea was reported on 58% (267/459) of study days. No antiemetics were given on most study days (412/522;79%); nevertheless, most of the study days (381/412;93%) which were unaccompanied by antiemetic support during the delayed phase were completely free from vomiting. Antiemetics were most often given as single agents (ondansetron: 54 study days; dimenhydrinate: 17 study days; dexamethasone: 6 study days). Diet was largely unaffected during the study period.ConclusionsAntineoplastic‐induced delayed nausea and vomiting may be less prevalent in children than in adults. Routine antiemetic administration during the delayed phase may not be warranted in all patients. Med Pediatr Oncol 2001;37:115–121. © 2001 Wiley‐Liss, Inc.
Painful peripheral neuropathy after treatment with high‐dose ifosfamide
Authors: Frisk Per , Stålberg Erik , Strömberg Bo , Jakobson Åke 
Published: August 2002

AbstractBackgroundIfosfamide is successfully employed in the treatment of bone and soft tissue sarcomas in children and young adults. Used at high doses (HDI) the drug may cause severe multiorgan toxicity. Peripheral neuropathy is a less well‐known side effect that may limit its use. We describe a 16‐year‐old girl with a Ewing sarcoma who was given post‐operative treatment with HDI (15 mg/m2 infused over 5 days). After the second course she experienced paresthesias in both feet. After the third course she developed signs of severe toxicity in the CNS, kidneys, heart, and severe pain in her feet.ProcedureNeurologic and neurophysiologic investigations, including neurographic studies of motor and sensory nerves, EMG, and thermotest, were performed in the acute phase and after 6 and 21 months, respectively. Renal and cardiac function was also assessed.ResultsShe developed generalized weakness of the arms and legs and an extremely painful hyperesthesia of the soles. The symptoms improved gradually during follow‐up but remained to some extent even after more than 2 years. Serial neurophysiologic investigations indicated classical signs of axonal neuropathy, which tended to improve during follow‐up. After 18 months the glomerular filtration rate and the effective renal plasma flow were 30 and 12% of normal, respectively, while other organ functions had returned to baseline.ConclusionsSymptoms of peripheral neuropathy after HDI may herald severe multiorgan toxicity, if continued. Early administration of anesthetics through the intrathecal route should be considered in case of ifosfamide‐induced painful peripheral neuropathy. Med Pediatr Oncol 2001;37:379–382. © 2001 Wiley‐Liss, Inc.
Cancer in older adolescents and young adults: Epidemiology, diagnosis, treatment, survival, and importance of clinical trials
Authors: Bleyer W. Archie 
Published: August 2002

AbstractCancer in adolescents and young adults has unique features in addition to the special medical, physical, psychological, and social needs of patients in this age group. The spectrum of malignant diseases is different from that in any other period in life, and it is strikingly different from the pattern in older persons. More people 15–25 years of age are diagnosed to have cancer than during the first 15 years of life. During the last 25 years, the incidence of cancer in this age range has increased faster while the increase in their cancer survival rates has been significantly lower than in younger or older patients, especially in comparison to results of the national pediatric cooperative cancer groups. Thus the 5‐year outcome in 15–19 year olds with leukemias and sarcomas is not only worse than in younger patients, but also lower in this population at large than in patients of the same age treated at Children's Cancer Group institutions. In the United States, only ∼5% of 15–25 year olds with cancer are entered onto clinical trials, in contrast to 60–65% of younger patients. Thus, cancer during adolescence and early adult life is an underestimated challenge that merits specific resources, solutions, and an international focus. Med Pediatr Oncol 2002;38:1–10. © 2002 Wiley‐Liss, Inc.
Placental site trophoblastic tumor (PSTT) in mother and child: First report of PSTT in infancy
Authors: Monclair Tom , Abeler Vera M. , Kærn Janne , Walaas Lisa , Zeller Bernward , Hilstrøm Carsten 
Published: August 2002

AbstractBackgroundTo the authors' knowledge, placental site trophoblastic tumors occurring simultaneously in mother and infant have not previously been reported.ProcedureThe clinicopathologic features of metastatic placental site trophoblastic tumor in a mother and her 4‐month‐old son are described.ResultsThe disease in the infant was aggressive, and he died in multiorgan failure within 5 weeks of hospital admission. Autopsy showed widespread metastases to liver, lungs, pleura, kidney, mesentery and lymph nodes. The mother, who had a uterine tumor and lung metastases, was treated with chemotherapy and hysterectomy and has no evidence of disease 26 months post‐treatment.ConclusionsThis report shows that placental site trophoblastic tumors can metastasize in both mother and child. Med Pediatr Oncol 2002;38:187–191. © 2002 Wiley‐Liss, Inc.