bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of V‐slot loaded patch for wide‐band operation
Authors: Ansari J. A. , Dubey Satya Kesh , Singh Prabhakar , Khan R. U. , Vishvakarma Babau R. 
Published: September 2008

AbstractIn this article, analysis of V‐slot loaded patch antenna is proposed using equivalent circuit model. Such antenna provides a wide bandwidth which depends inversely on the base width and slot thickness. The proposed results are compared with experimental and simulated results which are in good agreements. Radiation pattern of the proposed antenna is in good agreement with the simulated results. This validates the accuracy of the proposed model. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3069–3075, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23891
Strip‐loaded CPW‐fed triangular monopole antenna for UWB operation
Authors: Liu Wen‐Chung , Wu Chao‐Ming , Chung Shih‐Hsiung , Jaw Jieh‐La 
Published: September 2008

AbstractA coplanar waveguide (CPW)‐fed triangular monopole antenna with two loaded strips for ultra‐wideband (UWB) operation is proposed. The effects of both loaded strips to the triangular patch and embedded notches to the ground planes are analyzed and optimized to obtain the UWB performance. The proposed antenna experimentally reaches a −10 dB impedance bandwidth of 8.21 GHz (from 1.84 to 10.05 GHz) covering the band requirements of broadband or multifrequency communication systems. And, good monopole‐like radiation pattern and antenna gain have also been obtained. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3097–3101, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23896
Compact and low insertion loss dual‐mode bandpass filter
Authors: Sung Y. 
Published: September 2008

AbstractIn this article, a novel type of dual‐mode bandpass filter is presented. The novel structure is achieved by embedding a pair of crossed slots and spur‐lines. The proposed filter provides low insertion loss because there are no coupling gaps and radiation loss in feed structure. Without coupling gaps between feed lines and patch resonator, impedance matching can be easily obtained. The bandwidth and the location of attenuation poles are adjusted by the spur‐lines. In addition, this design has a practical, flexible, and wide coupling range for dual‐mode operation. The filter exhibits 18.5% bandwidth at the center frequency of 1.495 GHz. Insertion loss is better than 1.31 dB in the passband. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3201–3206, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23902
Time interval measurement for resonator fiber optic gyroscope based on slow light technology
Authors: Li Ying , Chen Xinglin 
Published: September 2008

AbstractIt is noted that the high‐group dispersion leads to huge enhancement of the fiber optic gyroscope's sensitivity in a resonating structure, and an approach to evaluate and design resonator gyroscope with slow‐light property is proposed. And then we could adopt time interval measurement to obtain angular velocity. A high‐resolution time‐to‐digital converter implemented in a general purpose field‐programmable‐gate‐array has been introduced. Experiments show that such a novel structure would allow for several orders of magnitude sensitivity enhancement that is particularly important for fiber optic gyroscope. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3220–3223, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23904
A higher‐order optical transformation for nonmagnetic cloaking
Authors: Gallina Ilaria , Castaldi Giuseppe , Galdi Vincenzo 
Published: September 2008

AbstractIn coordinate‐transformation‐based approaches to electromagnetic concealment (“cloaking”) of objects, use of higher‐order (quadratic) mappings has been proposed as an effective device to obtain satisfactory responses without the use of magnetic materials that are complicated to synthesize at optical frequencies. In this article, we explore a new higher‐order algebraic transformation, which allows, in principle, for a broader range of applicability and further parametric optimization. Via full‐wave numerical studies of near‐ and far‐field observables, we assess its performance by comparison with various reference cases (nonreduced parameters, quadratic transformation, no cloak). © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3186–3190, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23905
Printed PIFA with a coplanar coupling feed for penta‐band operation in the mobile phone
Authors: Wong Kin‐Lu , Huang Chih‐Hong 
Published: September 2008

AbstractA printed planar inverted‐F antenna (PIFA) with a novel coplanar coupling feed for GSM850/900/1800/1900/UMTS penta‐band operation in the mobile phone is presented. The proposed PIFA is printed on one surface of the system circuit board of the mobile phone with an occupied area of 10 × 60 mm2 only, making it promising for practical applications. In addition, the PIFA is easily fabricated at low cost and can be bent by half, such that it occupies a small volume of 5 × 5 × 60 mm3 or 1.5 cm3 inside the mobile phone. The coplanar coupling feed allows the PIFA to generate two wide operating bands for covering GSM850/900 and GSM1800/1900/UMTS operations, respectively. Detailed effects of the coplanar coupling feed on the performances of the proposed PIFA are studied. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3181–3186, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23906
Wavelength converters characterization based on four‐wave mixing and cross‐gain modulation using semiconductor optical amplifiers of diverse cavity lengths
Authors: Ribeiro Napoleão S. , Gallep Cristiano M. , Conforti Evandro 
Published: September 2008

AbstractSemiconductor optical amplifiers of various lengths are characterized in relation to the four‐wave mixing (FWM) properties, followed by the implementation of wavelength converters based on the cross‐gain modulation and FWM. The relative efficiencies of the converters are analyzed and the comparative eye diagrams are discussed. The measured Q‐factor shows that some of these converters can be used in systems operating up to 10 Gbits/s. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3246–3251, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23909
Study of a double printed UWB dipole antenna
Authors: Zhang Jin‐Sheng , Wang Fa‐Jia 
Published: September 2008

AbstractThe characteristics of a double printed UWB dipole antenna with two U‐shape arms are investigated both in frequency domain and time domain. Some reasonable theoretical analyses are proposed. Transmitting antenna transfer function, receiving antenna transfer function, and antenna system function are used to describe the antenna performance. Flat amplitude and linear phase responses of the transmitting antenna transfer function are observed in 3.0–8 GHz. Impulse responses for both single band and multiband schemers are studied in time domain. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3179–3181, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23912
Aperture‐coupled C‐shape slot cut square microstrip antenna for circular polarization
Authors: Chen Nasimuddin Z. N. , Qing Xianming 
Published: September 2008

AbstractA new C‐shape slot cut square microstrip antenna is proposed for circular polarization (CP) using an aperture‐coupled feed. The C‐shape slot cut square microstrip antenna is fed at the center using an aperture coupled to get CP operation. About 4.3% measured 3‐dB axial ratio (AR) bandwidth with 13% 10‐dB return loss bandwidth is achieved. The overall antenna size is 65.0 mm × 65.0 mm × 11.5 mm. The proposed technology can be used to design low‐cost, compact, broadband circularly polarized microstrip antennas and arrays. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3175–3178, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23913
Micromachined 50 GHz/60 GHz Phi filters by CMOS compatible ICP deep trench technology
Authors: Huang Pen‐Li , Wang Tao , Lin Yo‐Sheng , Lu Shey‐Shi , Teng Yu‐Ming , Huang Guo‐Wei 
Published: September 2008

AbstractMicromachined 50 and 60 GHz millimeter‐wave filters were implemented by using a 0.18 μm CMOS technology. The CMOS‐compatible inductively coupled‐plasma (ICP) deep trench technology is used to selectively remove the silicon underneath the filters completely, and so the substrate loss of the filters can be significantly reduced. The results show that 3.2, 2.6, and 2.1 dB improvements in S11, S21, and GAmax, respectively, are achieved for the 60 GHz filter after the backside ICP etching. Besides, for the 50 GHz filter, a 295.8% (from 9.6 to 38) improvement in Q‐factor of its inductors is achieved. These results show that the backside ICP etching is effective to reduce the substrate loss and parasitic capacitance in the millimeter‐wave frequency bands, and hence is very promising for millimeter‐wave CMOS RFIC applications. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3142–3146, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23915
A novel alternating current imaging radiometer for the security inspection
Authors: Zhang Guang‐Feng , Lou Guo‐Wei , Wang Hong 
Published: September 2008

AbstractDifferent from the traditional direct current radiometric imaging, an alternating current (AC) radiometer was presented to be passive millimeter‐wave imaging with simple and integrated structure for the purpose of security inspection in China. The AC radiometer image interpretation has its own characteristic. The imaging results of 3‐mm waveband AC radiometer show that it can obtain concealed objects characteristic and can be used to inspect the passenger for antiterrorism. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3259–3261, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23916
A UWB band‐notched antenna with novel branches on the back of substrate
Authors: Cai Yunlong , Feng Zhenghe 
Published: September 2008

AbstractOne branch‐on‐substrate‐back structure for band‐notching ultrawideband printed ellipse slot antenna is presented, which is for the 5.8 GHz band band‐notching. The band‐notching frequency is done easily by tuning the length of the branch. The article also analyzes the current distribution/fields, and proposes an LC‐in‐series model to explain the band‐notching structure. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3274–3278, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23925
Dual‐band 1:3 series power divider based on composite right/left‐handed transmission lines
Authors: Liu Xiao , Li Chao , Li Fang 
Published: September 2008

AbstractA dual‐band 1:3 series power divider that provides equal power splits to all three output ports is presented. To achieve dual‐band working, the divider employs, instead of conventional transmission lines of one wavelength, the composite right/left‐handed transmission lines (CRLH TLs) yielding electrical length of 0 and −2π at 1.14 and 2.47 GHz, respectively. Dual‐frequency transformers in two sections are added at the output ports to provide dual‐band impedance matching. Two pairs of isolation resistors are used to isolate the three output ports from each other, and their values are determined by solving the equivalent network model of the divider. The isolation between any of the two output ports is measured to be larger than 20 dB at both frequencies, which is of great use in power combination, and the dual‐band divider maintains a relatively compact size. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3236–3239, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23927
On the advantages of magnetic materials in microstrip antenna miniaturization
Authors: Ikonen Pekka , Tretyakov Sergei 
Published: September 2008

AbstractA simple explanation is provided for the advantages of magnetic materials in microstrip antenna miniaturization. The observations are derived from a standard transmission‐line model, and the findings are qualitatively verified using numerical simulations. It is shown that the advantages of magnetic materials arise from the favorable antenna geometry and favorable feed technique. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3131–3134, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23931
GSM850/900/1800/1900/UMTS printed monopole antenna for mobile phone application
Authors: Wong Kin‐Lu , Kang Ting‐Wei 
Published: September 2008

AbstractThe design of a printed monopole antenna on the system circuit board of the mobile phone for achieving GSM850/900/1800/1900/UMTS operation with a small area of 10 mm × 60 mm is presented. The antenna is easy to fabricate at low cost and mainly comprises a driven strip, a coupled strip, and a high‐pass matching network for providing two wide operating bands at about 900 and 1900 MHz to cover GSM850/900 and GSM1800/1900/UMTS operations, respectively. The wide lower band is controlled by the driven strip excited as a quarter‐wavelength mode, which is further tuned to become a dual‐resonance excitation by incorporating the high‐pass matching network for effective bandwidth enhancement. For the wide upper band, it is formed by a quarter‐wavelength mode excited at about 1800 MHz by the coupled strip and the higher‐order mode contributed by the driven strip. Furthermore, with the proposed antenna structure, the lower and upper bands can generally be tuned separately, which is an attractive feature and makes it easy to design for practical applications. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3192–3198, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23936
Design of a compact microstrip low‐pass filter using defected ground structure
Authors: Wei Feng , Shi Xiao Wei , Li Bin , Huang Qiu Lin , Wang Xin Huai 
Published: September 2008

AbstractA novel compact microstrip low‐pass filter (LPF) is proposed in this article. The proposed LPF is composed of semicircle‐defected ground structures (S‐DGS) and semicircle stepped‐impedance shunt stubs (S‐SISS). An equivalent lumped L‐C circuit model is also presented. With the S‐DGS and S‐SISS, better band‐stop performance and much smaller size can be obtained. Finally, theoretical and simulated results are presented, which are in good agreement with the measured results. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3157–3160, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23938
Low frequency noise optimization in Gilbert‐cell‐based mixers for direct conversion (zero‐IF) receivers
Authors: Alvarado U. , Berenguer R. , Adín I. , Meléndez J. , Legarda J. , Bistué G. 
Published: September 2008

AbstractThis letter analyses the low frequency noise performance in Gilbert‐cell‐based zero‐IF mixers. Several issues for optimizing the flicker noise performance while keeping a good mixer performance in terms of gain, noise figure, and power consumption are introduced in a quantitative manner. A CMOS zero‐IF mixer has been fabricated and measured. A flicker noise reduction up to 10.4 dB is achieved at 10 kHz with a power consumption of only 5.4 mW. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3128–3131, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23940
Fabrication of a new‐type wideband bandpass filter on the MGTA1.5NB0.5O6 ceramic substrate
Authors: Cheng Chien‐Min , Chen Ying‐Chung , Yang Cheng‐Fu 
Published: September 2008

AbstractTo enhance performance of microwave filter, one of the most effective methods is to insert transmission zeros in the stop‐bands. A modified end‐coupled microstrip line structure is combined with a hairpin resonator in this research. Using the combination technique and cross coupling, a miniature wideband microstrip bandpass filter is proposed on the MgTa1.5Nb0.5O6 microwave dielectric ceramic substrate. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3223–3225, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23943
A CMOS Colpitts voltage controlled oscillator with an enhanced transconductance method
Authors: Shie Ching‐Ian , Chiang Yi‐Chyun 
Published: September 2008

AbstractThis work presents a technique to enhance the performance of the conventional PMOS Colpitts VCO circuit. This technique is accomplished by adding an NMOS cross‐coupled pair under the traditional differential Colpitts VCO to enhance the oscillator startup condition. The signal analysis also supports this viewpoint and presents a device‐choosing method to optimize the output power and phase noise. In realization, the circuit in the CMOS 0.18‐μm technology, a U‐shaped inductor, and thick oxide varactors are adopted in circuit to increase the quality factor of resonant tank. The performance of VCO demonstrates a center frequency of 16.7 GHz, a FOM of −186.2 dBc/Hz, and the phase noise of −110.42 dBc/Hz at the 1 MHz offset from the oscillation frequency. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 3160–3164, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23944
Japanese experience of screening
Authors: Takeda Takeo , Hatae Yoshio , Nakadate Hisaya , Nishi Motoi , Hanai Junji , Sato Yasumasa , Takasugi Nobuo 
Published: September 2008

AbstractIn Sapporo City, the mass‐screening for neuroblastoma concerning the urine of infants at about 6 months of age, started in 1981. After 1984, the quantitative determination of VMA, HVA in the urine was carried out using high performance liquid chromatography from the first step.About 104,000 babies have received the screening during the last 7 years, and 19 patients were found (incidence of detection 1:5,500). Except for one, who died of the duodenal perforation shortly after the surgery, all other patients are surviving free from disease.Among 10,000 neonates, we determined urinary concentration of VMA, HVA, and no positive cases were found. However, from this group, 2 patients we detected by the mass‐screening at 6 months of age (1:5,000).After the start of mass‐screening, the number of the patients with this tumor in much earlier stages and younger ages increased, clarifying that the main cause for improvement of the survival rates of neuroblastoma in Sapporo.
Recognition of an in vivo immune response to human neuroblastoma modulation of antigen expression by retinoic acid
Authors: McGarry Ronald C. , Bowen Thomas , Hayes Anne , Hammersley‐Straw Deborah 
Published: September 2008

AbstractNeuroblastoma is one of the most common solid tumors of childhood and is notable for its ability to spontaneously regress and, in some instances, to differentiate to less malignant ganglioneuromas. Since immune mechanisms may account for these phenomena, identification of in vivo immune responses to tumor cell surface antigens may be important to the progression of the disease. As determined by analysis on the fluorescence‐activated cell sorter, sera from 10 of 18 neuroblastomas patients were found to contain antibodies to a cell surface antigen present on subpopulations of cells from human neuroblastoma cell lines maintained in vitro. Eight human neuroblastoma cell lines were examined and found to vary in reactivity with sera. Induction of differentiation of cell lines with retinoic acid (RA) in vitro resulted in most cell lines bearing higher percentages of positive cells but with a decreased mean cell fluorescence. Preliminary Western blot analysis of lysates of the human cell lines NMB/N7, SMS‐KAN, and SK‐N‐MC showed two principal antigen bands on reducing gels. Comparison of sera from different individuals on lysates of cell lines showed reactivity principally with bands of 105‐110 kD and 65‐70 kD and an additional minor band of slightly lower molecular weight with the higher titer sera. The ability of different sera to recognize a common antigen pattern suggests that this represents an immunodominant cell surface antigen. Examination of reactivity of other cell lines in this system showed that positive sera reacted with all neuroblastoma lines examined, one neuroepithelioma (SK‐N‐MC), two melanoma lines (MeWo, C361), and one adrenal‐derived adenocarcinoma (SW‐13).
Psychosocial status of young adult survivors of childhood cancer: A survey
Authors: Meadows Anna T. , McKee Linda , Kazak Anne E. 
Published: September 2008

AbstractThe majority of childhood cancer patients now can expect to survive into early adulthood, cured of their cancer. Current adult survivors are a diverse group in terms of diagnosis, age at diagnosis, and types of treatment. It is estimated that by 1990, 1 in every 1,000 twenty‐year‐olds will have had cancer, making it important to describe the long‐term psychosocial adjustment of this population.Patients who were diagnosed between 1948 and 1975 while less than 16 years of age, who were currently 18 years or older, had been off therapy for at least 5 years, and had no known brain damage were eligible for this survey and were identified through the tumor registry at the Children's Hospital of Philadelphia (CHP). Initially, the parents were contacted by letter. Ninety‐five (57%) of the 167 eligible patients participated in a telephone interview, which covered educational achievement, occupational status, interpersonal relationships, marital status, pregnancies, employee benefits and insurance, and medical and health behaviors. Respondents were not different from nonrespondents in terms of sex, year of diagnosis, age at diagnosis, diagnoses, stage of illness, or type of treatments. There were no differences in terms of education, marital status, fertility issues, or occupational status by diagnosis group, age at diagnosis, or treatments. The patients were compared to siblings over 18 years of age in terms of education and marital status. No significant differences in sex distribution or years of education between patients and siblings were found. The siblings were, as a group, older than the patients and were more likely to be married.In general, these patients were functioning normally, but there are many unexplored areas of interpersonal relationships and productivity that need further study before conclusions regarding psychosocial adjustment of childhood cancer survivors can be drawn.
A novel LMNA gene mutation Leu162Pro and the associated clinical characteristics in a family with autosomal‐dominant emery–dreifuss muscular dystrophy
Authors: Kim Hyun Y. , Ki Chang‐Seok , Kang Seok‐Jae , Khang Shin K. , Koh Seong‐Ho , Kim Dong‐Won , Kim Seung H. , Sung Il‐Hoon 
Published: September 2008

AbstractWe report the clinical characteristics, genetic analysis, and muscle biopsy findings of a family with Emery–Dreifuss muscular dystrophy and a novel mutation (Leu162Pro) in the LMNA gene. Within this single family, the age of onset and disease severity varied among the family members. In addition, focal defects of nuclear membranes with chromatin blebs in endothelial cells was shown via electron microscopy. Muscle Nerve 38: 1336–1339, 2008