bluuebunny/crossref_metadata_2025_split huggingface dataset:
Characterization and modeling of on‐wafer single and multiple vias for CMOS RFICS
Authors: Shi Xiaomeng , Seng Yeo Kiat , Anh Do Manh , Chye Boon Chirn 
Published: January 2008

AbstractCharacterization of on‐wafer vias using a 0.18‐μm RF CMOS technology is presented. Equivalent resistance and inductance of a single via and multiple vias with different physical arrangements are extracted from full wave simulations up to 30 GHz. An equivalent circuit model with frequency‐independent components is proposed to model the frequency‐dependent characteristics of the vias. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 713–715, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23173
A novel bandpass filter based on complementary split rings resonators and substrate integrated waveguide
Authors: Che Wenquan , Li Chao , Deng Kuan , Yang Lisheng 
Published: January 2008

AbstractOne novel bandpass filter implemented with combination of two different structures‐complementary split rings resonators (CSRRs) and substrate integrated waveguide (SIW) is proposed in this article. Several CSRRs are etched on the surface of SIW to form the stopband with very sharp rejection. One prototype was fabricated, the measured results indicate 30% passband (at −15 dB return loss), the rejection band ranges from 6.4 GHz to 7.8 GHz, about 20% bandwidth at −20 dB rejection, the maximum rejection even reaches 50 dB. The rejection skirt is very sharp, only 18 MHz. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 699–701, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23182
Design of spur‐line‐loaded cross‐coupled dual‐band bandpass filter with wide upper‐end stopband
Authors: Hsieh Yi‐Huan , Lee Ching‐Her , Hsu Chung‐I. G. 
Published: January 2008

AbstractThis article presents the design of a compact fourth‐order cross‐coupled dual‐band bandpass filter (BPF) having a wide upper‐end stopband. Quarter‐wavelength (λ/4) stepped‐impedance resonators (SIRs) were employed to construct the BPF to have a relatively small circuit size and high spurious harmonics, as compared with the BPF using half‐wavelength (λ/2) SIRs. The resonators tapped by the input and output feeding lines were loaded by a spur‐line to suppress the first spurious passband so as to further broaden the upper‐end stopband. BPFs with and without the embedded spur‐lines were both simulated to compare their frequency responses. Very good agreement between the simulated and measured results was observed. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 691–694, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23186
Gradient‐based optimization of packaged integrated microwave circuits exploiting reduced electromagnetic models
Authors: Assadihaghi Atousa , Bila Stéphane , Baillargeat Dominique , Aubourg Michel , Verdeyme Serge 
Published: January 2008

AbstractA gradient‐based optimization method is presented for the design of packaged integrated microwave circuits. The method uses a reduced electromagnetic model resulting in a quasi‐instantaneous analysis of the packaged device. A gradient‐based strategy identifying parasitic effects due to circuit packaging is then deployed for optimizing the whole device. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 688–691, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23187
Wideband monopole antenna for DTV/GSM operation in the mobile phone
Authors: Lee Cheng‐Tse , Wong Kin‐Lu , Lin Yuan‐Chih 
Published: January 2008

AbstractA wideband monopole antenna comprising a narrow radiating strip of length 120 mm and a simple internal matching portion for mobile phone application is presented. The monopole antenna can generate a wide operating band to cover the DTV reception in the UHF frequency band (470–862 MHz) and mobile communication in the GSM850/900 bands (824–894 MHz/890–960 MHz). The radiating strip is also promising to be retracted to be concealed inside the casing of the mobile phone when not in use. Details of the proposed antenna are described in the study. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 801–806, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23194
A low‐cost compact uniplanar Quasi–Yagi printed antenna
Authors: Ávila‐Navarro E. , Segarra‐Martínez A. , Carrasco J.A. , Reig C. 
Published: January 2008

AbstractA low cost directive uniplanar broadband printed Quasi–Yagi antenna design is presented. As a particular realization, some prototypes have been designed to operate in the 2.45 GHz band. They have been then modeled, fabricated onto standard printed circuit dielectric substrate and tested successfully. For the design and the modeling processes, we have make use of FDTD based in‐house developed algorithms. The obtained bandwidth is, for all the considered cases, better than 15%. The main radiation characteristics are 2–5.5 dBi gain, depending on the number of director elements, and better than 25 dB front‐to‐back ratio. Overall antenna size was, in any case lesser than 1 λ × 0.5 λ. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 731–735, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23197
Linearity improvement of three‐way Doherty amplifier using power tracking bias supply method
Authors: Lee Yong‐Sub , Lee Mun‐Woo , Jeong Yoon‐Ha 
Published: January 2008

AbstractThis letter presents highly linear three‐way Doherty power amplifier (DPA) using power tracking bias supply method. The drain biases of carrier and peaking amplifiers and the gate biases of peaking amplifiers are adaptively controlled by the power tracking circuit according to average power levels of the input signal. For validation, a three‐way DPA is implemented using 30‐W Si LDMOSFETs and tested for two‐tone and 1‐carrier WCDMA signals at 2.14 GHz. The measured results show the notable linearity improvement over a wide output power range. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 728–731, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23198
Compact ultra‐wideband bandpass filter with improved out‐of‐band rejection
Authors: Mondal Priyanka , Kanti Mandal Mrinal , Chakrabarty Ajay 
Published: January 2008

AbstractThis letter presents a compact ultra‐wideband bandpass filter with improved out‐of‐band rejection performances. Complementary split ring resonators with microstrip feed lines are used to design the filter. Measurements show that maximum insertion loss within the ultra‐wide passband is below 2 dB. The 50‐dB stopband on the lower end is from DC to 2.48 GHz and the 25‐dB upper stopband is from 11.27 to 20 GHz. Out‐of‐band rejection performance of the filter satisfies and exceeds the U.S. Federal Communications Commission's indoor limit. Implementation area of the filter is 0.54 λg× 0.22 λg, λgis the guided wavelength of 50‐Ω microstrip line at 6.85 GHz. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 758–761, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23203
Multiwavelength YB‐doped fiber ring laser based on a Mach‐Zehnder interferometer
Authors: Tu Chenghou , Guo Wengang , Li Yongnan , Zhang Shuanggen , Zhu Hui , Lu Fuyun 
Published: January 2008

AbstractWe proposed and demonstrated a room‐temperature multiwavelength Yb‐doped fiber ring laser with high stability based on a Mach‐Zehnder interferometer by exploiting spatial hole burning and polarization hole burning effects, from which stable eight lasing wavelengths is obtained. The number of the lasing wavelengths (eight) is the most to our knowledge, and the wavelength spacing is 1.1 nm. Triple‐, and dual‐wavelength operation with the wavelength spacing of 1.1 nm or its integral multiples have been obtained by adjusting the intracavity polarization controllers. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 723–725, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23206
Self‐Aligned Wafer‐Level Integration Technology with an embedded faraday cage for substrate crosstalk suppression
Authors: Sharifi H. , Mohammadi S. 
Published: January 2008

AbstractA modification to a recently developed chip/wafer integration technology has proven to be very effective in suppressing the substrate crosstalk for mixed signal systems. In this implementation, analog and digital chips are fabricated on separate dies, and then integrated on a single Si substrate using a Self‐Aligned Wafer‐Level Integration Technology. A truly grounded faraday‐cage structure is realized by sidewall metallization around each die resulting in an ultimate substrate noise reduction. Any planar chip with any thickness can be used in this technology. Simulation and measurement results show that when a high‐resistivity silicon substrate as an integration medium is used along with grounded faraday cage, substrate coupling is suppressed to less than −60 dB for frequencies up to 25 GHz. For a low‐resistivity silicon substrate, the substrate coupling is a dominant mechanism in generating mixed‐signal noise, however, when sidewall metallization as faraday cage is utilized, the substrate coupling is reduced by at least 20 dB for frequencies below 25 GHz. The substrate noise suppression is higher than 35 dB for frequencies below 2 GHz. To our knowledge, these are the best values reported for isolation improvement of thick silicon substrates at microwave frequencies. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 829–832, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23207
Innovative design of a planar fractal‐shaped GPS/GSM/Wi‐Fi antenna
Authors: Azaro R. , Zeni E. , Rocca P. , Massa A. 
Published: January 2008

AbstractIn this letter, the design of a microstrip three‐band antenna working in GPS, GSM, and Wi‐Fi frequency bands is described. By considering a planar geometry printed on a dielectric substrate, the tuning of the antenna behavior in three nonharmonic frequency bands is obtained perturbing the patch perimeter according to a Koch‐like fractal shape. The synthesis procedure is automatically performed by means of an iterative PSO‐based optimization strategy where a fractal boundary generator is integrated with a MoM‐based electromagnetic simulator. The feasibility of the approach as well as the reliability of the synthesized antenna is assessed through simulations as well as experimental results. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 825–829, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23208
CPW‐FED shorted monopole antenna for broadband application
Authors: Liu Wen‐Chung , Yeh Feng‐Ming 
Published: January 2008

AbstractBy embedding two folded narrow slots into a rectangular patch, a shorted monopole fed by a coplanar waveguide (CPW) structure is obtained and can achieve broadband impedance matching for wireless application. Prototype of the obtained design has been constructed and experimentally studied. The measured results explore wide operation with −10 dB impedance bandwidth of 3.21 GHz, ranging from 4.29 to 7.5 GHz, and show good agreement with the numerical predictions. Also, good radiation pattern and high antenna gains over the operating band have also been observed. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 787–789, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23210
Infrared phased‐array antenna
Authors: Middlebrook Christopher T. , Krenz Peter M. , Lail Brian A. , Glenn D. Boreman  
Published: January 2008

AbstractPhased addition of currents from multiple dipole antennas is demonstrated for the first time at a wavelength of 10.6 μm. Coplanar strip lines are used to interconnect the antennas, preserving the phase of the individual infrared‐frequency currents, which are summed together at a common bolometric load. Angular pattern measurements on two‐element dipole arrays show that the direction of maximum response depends on the phase difference between the currents contributed from each antenna, evaluated at the bolometer location. As more antennas are added together in phase, beam narrowing is observed. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 719–723, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23213
All‐optical generation of microwave using a photonic crystal fiber Brillouin laser based on Bragg grating Fabry‐Perot cavity
Authors: Geng Dan , Yang Dongxiao , Zhang Xianmin , Dong Qiujun , Wang Liang , Shao Xiaojie 
Published: January 2008

AbstractA novel all‐optical technique for microwave generation using photonic crystal fiber Brillouin laser is presented, and a 9.78‐GHz microwave signal generator based on the Brillouin laser is experimentally realized. The Brillouin laser is based on a fiber Fabry‐Perot cavity with fiber Bragg gratings as reflectors along with 25‐m photonic crystal fiber as Brillouin gain medium. The fiber Bragg gratings are chosen to realize low laser threshold and suppress the higher‐order Stokes waves. Predictions of numerical simulations are compared with experimental results and both are in good agreement with each other. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 809–814, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23221
Greedy search and a hybrid local optimization/genetic algorithm for tree‐based inverse scattering
Authors: Wildman Raymond A. , Weile Daniel S. 
Published: January 2008

AbstractA genetic programming‐based geometry optimization method for inverse scattering that uses a tree data structure to encode Boolean combinations of convex shapes has recently been shown to outperform other genetic algorithm‐based techniques. Nonetheless, the genetic algorithms are still inefficient for inverse scattering. This letter treats the inefficiency with local search techniques. First, an implementation using greedy search is discussed. Next, a local search method is added to the genetic algorithm used in the previous approach. Numerical results show that the number of function evaluations necessary to image conducting cylinders can be reduced by several orders of magnitude. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 822–825, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23222
New inequalities for finite and infinite group problems from approximate lifting
Authors: Miller Lisa A. , Li Yanjun , Richard Jean‐Philippe P. 
Published: January 2008

AbstractIn this paper, we derive new families of facet‐defining inequalities for the finite group problem and extreme inequalities for the infinite group problem using approximate lifting. The new valid inequalities for the finite group problem include two‐ and three‐slope facet‐defining inequalities as well as the first family of four‐slope facet‐defining inequalities. The new valid inequalities for the infinite group problem include families of two‐ and three‐slope extreme inequalities. These new inequalities not only illustrate the diversity of strong inequalities for the finite and infinite group problems, but also provide a large variety of new cutting planes for solving integer and mixed‐integer programming problems. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008
A summary of epiphyseal union timings in Bosnian males
Authors: Schaefer M. C. 
Published: January 2008

AbstractDry bone documentation of epiphyseal union times is scarcely represented within the literature due to the difficulties in obtaining large sample sizes of known‐age, juvenile osseous material. The identified missing from the recent conflicts in the former Yugoslavia has become a source for such a sample. This study investigates the union times of 26 epiphyses, in addition to union of the sternebrae, in 256 identified Bosnian males between the ages of 14 to 30 years. Progress of union was recorded by assigning each epiphysis to one of three phases denoting open, active or complete union. Age/phase distributions are provided for each of the epiphyses, as well as a summary table documenting overall age parameters. The results of this analysis not only increase the discipline's overall understanding of the timings of developmental changes, but will also assist in the process of age estimations, specifically within the Balkans. Copyright © 2008 John Wiley & Sons, Ltd.
Synthesis and characterization of conjugated polymers containing a carbazole moiety
Authors: Liu Yingliang , Xu Shengang , Li Jianghui , Xin Yuanrong , Zhao Guoxin , Ye Baoxian , Cao Shaokui 
Published: January 2008

AbstractTwo series of conjugated polymers with a carbazole moiety were synthesized by Knovenagel and Wittig condensations. The chemical structure, thermogravimetric, photophysical and electrochemical properties of the polymers were characterized by 1H‐NMR, IR, GPC, TG, UV‐vis, FL, and CV. The results indicated that PBM is the most thermally stable one and PBP is the most thermally instable one. The absorption and emission properties of the polymers were adjusted by the modification of chemical structures. The quenching effect of cyano group and oxygen atom results in the lower fluorescence quantum efficiency. The fitted emission spectra suggested that the emission spectra of all the polymers come from different vibronic transitions and aggregation emission. Copyright © 2008 John Wiley & Sons, Ltd.
Differential gene expression signature between primary and metastatic head and neck squamous cell carcinoma
Authors: Liu C‐J , Liu T‐Y , Kuo L‐T , Cheng H‐W , Chu T‐H , Chang K‐W , Lin S‐C 
Published: January 2008

AbstractHead and neck squamous cell carcinoma (HNSCC) is a world‐wide malignancy. This study aimed to identify differential gene expression associated with the progression of disease from primary to metastatic HNSCC. Microdissection retrieved pure epithelial cells from paired primary tumours and cervical lymph node metastasis. cDNA microarray analysis and algorithm grouping identified differential mRNA expression of 301 genes. Quantitative reverse transcription‐polymerase chain reaction analysis clarified the up‐regulation of CCL19, CR2, EGR2, FUCA1, RGS1, and SELL, as well as the down‐regulation of IGFBP6 and KLK8 in nodal metastasis compared to primary tumours. Immunohistochemistry confirmed the up‐regulation of SELL and down‐regulation of IGFBP6 in nodal metastasis relative to primary tumours. Interestingly, primary tumours exhibiting higher FUCA1 and SELL expression were associated with significantly worse patient survival. In OECM‐1 HNSCC cells, inhibition of proliferation, migration, and anchorage‐independent growth was noted following knockdown of SELL expression. In SAS HNSCC cells, expression of exogenous SELL resulted in increased invasion, anchorage‐independent growth, and xenographic tumourigenesis in nude mice. Knockdown of FUCA1 and treatment with IGFBP6 inhibited the migration of OECM‐1 cells. Knockdown of RGS1 inhibited the anchorage‐independent growth of SAS cells. Our results provide a useful gene signature profile describing the factors underlying the metastasis of HNSCC to cervical lymph nodes, which may be beneficial for the treatment of HNSCC metastasis. Copyright © 2008 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Influence of DMF on the polymerization of tert‐butyl acrylate initiated by 4‐oxo‐TEMPO‐capped polystyrene macroinitiator
Authors: Kuo Kuo‐Huai , Chiu Wen‐Yen , Cheng Kuo‐Chung 
Published: January 2008

AbstractBACKGROUND: In a number of studies it has been shown that 2,2,6,6‐tetramethylpiperidinooxy (TEMPO)‐mediated polymerization of acrylates is not facile. Therefore, the object of the study reported here was to prepare poly[styrene‐block‐(tert‐butyl acrylate)] (PS‐b‐PtBA) block copolymers using 4‐oxo‐TEMPO‐capped polystyrene macroinitiator as an initiator, in the presence of small amounts of N,N‐dimethylformamide (DMF). The kinetic analysis and the effect of DMF on the reaction mechanism are also discussed.RESULTS: PS‐b‐PtBA block copolymer was prepared through polymerization of tert‐butyl acrylate (tBA) initiated by 4‐oxo‐TEMPO‐capped polystyrene macroinitiator at 135 °C. The polymerization rate of tBA could be increased by adding a small amount of DMF, and the number average molecular weight of the PtBA block in PS‐b‐PtBA reached 10 000 g mol−1 with narrow polydispersity. The activation rate constant kact−tBA of alkoxyamine increased and the recombination rate constant krec−tBA decreased with increasing DMF concentration.CONCLUSION: DMF was shown to be a rate‐enhancing additive for the polymerization of tBA using a 4‐oxo‐TEMPO‐capped polystyrene macroinitiator. From the kinetic analysis, it was concluded that the improvement of polymerization with the addition of DMF was due to an increase in kact−tBA and a decrease in krec−tBA. Copyright © 2008 Society of Chemical Industry
Finding consensus on the physiotherapy management of asymptomatic infants with cystic fibrosis
Authors: Prasad S.A. , Main E. , Dodd M.E. 
Published: January 2008

AbstractBackgroundBabies with cystic fibrosis diagnosed by neonatal screening often display no overt signs of respiratory disease. The role of traditional routine daily chest physiotherapy in this particular group of babies is unclear and has generated considerable international debate. There is currently no evidence addressing this issue and present circumstances preclude a rigorous trial in the UK. This study aimed to provide expert consensus regarding the physiotherapy management of asymptomatic infants with CF.MethodA Delphi consensus method was used to gather and refine expert opinions of senior paediatric physiotherapists in the UK. Agreement was sought on 16 statements reflecting aspects of physiotherapy management in ‘asymptomatic’ babies with cystic fibrosis.ResultsTwenty‐five senior paediatric physiotherapists from Specialist CF Centres throughout the UK participated in the study. Consensus was high amongst the respondents for 15 of the 16 statements. One statement failed to reach consensus. This related to the question of not routinely initiating a daily chest physiotherapy regimen in apparently healthy babies. Due to the lack of consensus an amendment to this statement was made, to allow a more flexible approach, where physiotherapists would not be obliged to initiate routine daily treatment in asymptomatic babies with CF, if they felt other another approach was justified.ConclusionThere was high consensus of opinion amongst senior physiotherapists in the UK on most aspects of the physiotherapy management of babies with CF. Consensus could not be achieved on whether routine daily chest physiotherapy is necessary in ‘asymptomatic’ babies. An agreed amendment to the original statement allows professionals to modify or change traditional practice with the sanction of their senior colleagues. The results of this process will be used by the Association of Chartered Physiotherapists in Cystic Fibrosis to form the basis of national clinical guidelines. Pediatr Pulmonol. 2008; 43:236–244. © 2008 Wiley‐Liss, Inc.