bluuebunny/crossref_metadata_2025_split huggingface dataset:
X‐band low phase noise in‐phase and out‐of‐phase injection‐locked push–push DRO
Authors: Cao Zhou , Tang Xiaohong , Wang Ling 
Published: August 2010

AbstractAn X‐band push–push dielectric resonator (DR) oscillator with injection locking capability has been developed.Two injection locking methods, i.e., the in‐phase method and the out‐of‐phase method, are studied. It is found that the out‐of‐phase method has wider locking range and much less effects on fundamental suppression than that of the in‐phase method. The oscillator generates an output power of 9.5 dBm at 12.4 GHz and has a fundamental suppression of 32.5 dBc. Despite using a high quality (Q) factor DR, wide locking range has been obtained. SiGe HBTs with good flicker noise performance were chosen for low phase noise design. The phase noise values of the free running oscillator are −104.4 dBc/Hz, −120.2 dBc/Hz, and −142.6 dBc/Hz at 10 kHz, 100 kHz, and 1 MHz offsets from the carrier frequency, respectively. The phase noise performance is superior or comparable to the reported designs. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2448–2452, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25510
A single‐chip RF power amplifier with integrated impedance matching Wilkinson power dividers for 5.2 GHz WLAN applications
Authors: Kaymaksut Ercan , Gürbüz Yasar , Tekin İbrahim 
Published: August 2010

AbstractIn this article, a new on‐chip power combining technique by using impedance matching Wilkinson power divider circuits will be presented. Two impedance matching Wilkinson power dividers are employed for matching the input and output impedances of the amplifier to 50 Ω as well as splitting the input power into two amplifiers and combining their output powers. A 5.2 GHz fully integrated class‐A mode combined power amplifier is designed in 0.35 μm SiGE BiCMOS technology to assess the power combining technique for WLAN applications. The power amplifier with the on‐chip lumped element impedance matching Wilkinson power divider circuits has a measured small signal gain of 5.21 dB. The output power at 1 dB compression point is measured as 22.4 dBm, and the power added efficiency of 17% is achieved at 1‐dB compression point. The chip area is significantly reduced by using lumped element impedance matching Wilkinson power dividers; the total die size is 1.2 × 1.25 mm2, including radio frequency (RF) and bias pads. The simulated (Cadence) and measured performance of combined power amplifier are well matched. Thus, the RF power amplifier and combiner/splitter circuits can be used for 5.2 GHz WLAN applications. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2413–2419, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25511
Miniaturized lowpass and bandstop filters using controlled coupling of open‐loop‐ring defected ground structure
Authors: Boutejdar A. , Omar A. 
Published: August 2010

AbstractIn this article, we present a compact microstrip bandstop filter using an open‐loop‐ring defected ground structure slot, etched in the ground plane and a simple Hi‐Lo line on the top layer. With the proposed coupling technique, a simple transformation from BSF to a corresponding LPF has been realized. The design procedure is validated using the commercial full‐wave simulator Microwave Office. The proposed BSF provides sharp transition characteristics, a wide upper stop band and improved passband response symmetry. Finally, the proposed filter structure has been fabricated and measured. The measurements are in a good agreement with the simulated results. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2575–2578, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25527
Compact fractal antenna with self‐complementary hilbert‐curves for WLAN dual‐band and circular polarization applications
Authors: Liu Ji‐Chyun , Zeng Bing‐Hao , Chen Hung‐Lin , Bor Sheau‐Shong , Chang Dau‐Chyrh 
Published: August 2010

AbstractThe authors propose a compact fractal antenna consisted of a Hilbert‐curve and self‐complementary configuration with dual‐band and circular polarization characteristics. This design merges the inductively loaded monopole antenna and the self‐complementary antenna to obtain a new monopole antenna. The self‐complementary Hilbert‐curve monopole antenna presents the desired bands of 2.43 GHz with bandwidth (BW) = 70 MHz (2.88%) and 5.35 GHz with BW = 550 MHz (10.36%). The circular polarizations for dual‐band are demonstrated with AR spectrum and orthogonal modes. The proposed antenna is successfully simulated and measured with frequency responses, radiation patterns, current distributions, and electric field intensities. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2535–2539, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25528
Slot tag antenna for highQRFID chip
Authors: Deleruyelle T. , Pannier P. , Egels M. , Bergeret E. 
Published: August 2010

AbstractThis article presents a radio frequency identification (RFID) tag slot antenna.This antenna is suitable for highQRFID chip. The input impedance at 915 MHz should be 19 +j492 Ω. Simulated maximum range is more than 8 m on Federal Communication Commission (FCC) RFID band and more than 3 m on the entire RFID band. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2493–2495, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25531
A novel photonic RF phase shifter based on polarization controller
Authors: Liu Ning , Chen Han , Li Jianhua , Yi Ping 
Published: August 2010

AbstractA novel radio frequency (RF) photonic phase shifter based on polarization controller is presented and the theoretical fundamentals of the design are explained.This phase shifter provides broad operational bandwidth and a full 360° phase shift tuning range with a commercial polarization controller. A prototype of the RF photonic phase shifter with a frequency of 26.75 GHz and 360° tuning range is experimentally demonstrated. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2598–2600, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25533
A novel design of triplexer for GSM based on SIR
Authors: Garmjani N. Molaei , Komjani Nader 
Published: August 2010

AbstractIn this article, a triplexer is presented for three operation frequencies in GSM, based on stepped impedance resonators (SIR).SIR structures have some characteristics, such as low weight, little dimension, and the ability of providing filter behavior with different frequencies in same dimensions. To design the triplexer, bandpass filters of each output should be design first. Parallel connection of three filters together causes an extreme increase in insertion loss of each filter and also reflection of power to the input. A novel based‐on‐SIR matching circuit is proposed to solve these problems. By connecting optimized matching circuits to three bandpass filters [1], which are simulated for three frequency ranges in GSM, the desired triplexer is obtained. This based‐on‐SIR triplexer is simulated and fabricated. The measurement results of the fabricated prototype shows a good agreement with simulation results. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2563–2568, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25535
On‐board small‐size printed monopole antenna integrated with USB connector for penta‐band WWAN mobile phone
Authors: Wong Kin‐Lu , Chang Chih‐Hua 
Published: August 2010

AbstractAn on‐board small‐size printed two‐strip monopole antenna integrated with a universal series bus (USB) connector and generating two wide operating bands to cover penta‐band wireless wide area network operation in the 824–960/1710–2170 MHz bands is presented.The two strips of the antenna are respectively printed on two small no‐ground portions of 15 × 25 and 15 × 15 mm2 (total size 600 mm2). In‐between the two printed strips, there is a protruded ground of 15 × 10 mm2 to accommodate a USB connector, which serves as the data port of the mobile phone. Also, easy control of the antenna's two wide lower and upper bands can be achieved by respectively adjusting the longer and shorter strips of the printed monopole antenna. That is, the antenna is easy to fabricate and also easy to fine‐tune in practical applications. Details of the proposed antenna are presented and discussed. The radiation characteristics of the antenna, including the specific absorption rate results with the presence of the user's head and hand, are also studied. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2523–2527, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25537
Millimeter‐wave six‐port in combined microstrip and substrate‐integrated waveguide technologies
Authors: Boukari Bouraima , Moldovan Emilia , Cojocaru Razvan I. , Wu Ke , Bosisio Renato G. , Ovidiu Tatu Serioja 
Published: August 2010

AbstractA millimeter‐wave six‐port implementation using combined substrate‐integrated waveguide (SIW) and microstrip technologies, and low‐loss short transition between microstrip and SIW is presented. The six‐port is implemented using SIW hybrid couplers with continuous metalized grooves and Wilkinson power dividers. The proposed circuit is suitable for 77‐GHz radar sensor front ends. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2488–2493, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25538
A 7‐ to 14‐GHz GaAs pHEMT LNA with 1.1 dB noise figure and 26 dB gain
Authors: Peng Yang‐Yang , Lu Ke‐Jie , Sui Wen‐Quan 
Published: August 2010

AbstractA three‐stage 7‐ to 14‐GHz monolithic low‐noise amplifier (LNA) has been fabricated using 0.15‐μm AlGaAs/GaAs pHEMT technology.To achieve ultra low noise figure and wide operation bandwidth, the proposed LNA uses wideband matching network and negative feedback technique. Measured results from 7 to 14 GHz demonstrate a minimum of 1.1 dB noise figure and 26 dB gain. The input and output return loss exceeded 10 dB across the band. These results demonstrate the best performance of AlGaAs/GaAs pHEMT technology for wideband and low noise applications. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2615–2617, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25547
High raman gain of dispersion compensation fiber using RZ‐DPSK format for long‐haul DWDM transmission system
Authors: Lin Hsiu‐Sheng , Lai Po‐Chou 
Published: August 2010

AbstractWe investigated the transport of a 16 channels 40 Gb/s dense wavelength division multiplexing (DWDM) system which uses high Raman gain of dispersion compensation fiber (DCF) for long‐haul DWDM transmission. Using the return to zero differential phase shift keying (RZ‐DPSK) modulation format with an optimized dispersion compensation format, we demonstrate DWDM transmission with a capacity of 640 Gb/s with 0.4 nm channel spacing over 4500 km of transmission fiber. The transmission system structure uses 120 km single mode fiber and 30 km DCF for thirty spans in the C band wavelength range and a Raman Amplifier with high Raman gain to achieve long‐haul transmission. We also used enhanced forward error correction for high capacity transmission over several thousand kilometers with the RZ‐DPSK modulation format. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2548–2551, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25552
Max CAPR: High‐resolution 3D contrast‐enhanced MR angiography with acquisition times under 5 seconds
Authors: Haider Clifton R. , Borisch Eric A. , Glockner James F. , Mostardi Petrice M. , Rossman Phillip J. , Young Phillip M. , Riederer Stephen J. 
Published: August 2010

AbstractHigh temporal and spatial resolution is desired in imaging of vascular abnormalities having short arterial‐to‐venous transit times. Methods that exploit temporal correlation to reduce the observed frame time demonstrate temporal blurring, obfuscating bolus dynamics. Previously, a Cartesian acquisition with projection reconstruction‐like (CAPR) sampling method has been demonstrated for three‐dimensional contrast‐enhanced angiographic imaging of the lower legs using two‐dimensional sensitivity‐encoding acceleration and partial Fourier acceleration, providing 1mm isotropic resolution of the calves, with 4.9‐sec frame time and 17.6‐sec temporal footprint. In this work, the CAPR acquisition is further undersampled to provide a net acceleration approaching 40 by eliminating all view sharing. The tradeoff of frame time and temporal footprint in view sharing is presented and characterized in phantom experiments. It is shown that the resultant 4.9‐sec acquisition time, three‐dimensional images sets have sufficient spatial and temporal resolution to clearly portray arterial and venous phases of contrast passage. It is further hypothesized that these short temporal footprint sequences provide diagnostic quality images. This is tested and shown in a series of nine contrast‐enhanced MR angiography patient studies performed with the new method. Magn Reson Med, 2010. © 2010 Wiley‐Liss, Inc.
Visible light‐absorbing biocompatible polymers based on L‐lactide and aminosugars: preparation and characterization
Authors: Skotak Maciej , Larsen Gustavo 
Published: August 2010

AbstractTwo series of polymers with low‐molecular‐weight L‐lactide side‐arms were prepared by ring‐opening polymerization using D‐glucosamine and N‐acetyl‐D‐glucosamine as polymer core molecules, and methanesulfonic acid as solvent and catalyst. This simple synthetic route does not rely on the use of organometallic catalysts, and has also proven useful to the authors for chitosan grafting with lactones. NMR spectroscopy reveals a high degree of substitution (>3), and Fourier transform infrared/NMR spectra suggest the existence of three different lactate tautomers likely to be responsible for coloration. These D‐glucosamine‐based polymers also display glass transition temperatures approximately 10 °C above that of the human body, which points to the potential of these lactone‐grafted aminosugars with tunable amphiphilic character in the design of submicrometer‐sized drug delivery vehicles. They are also viewed as interesting hydrophobic chelating agents for catalytic transition metal centers. Copyright © 2010 Society of Chemical Industry
PHF11 is not a major candidate gene for asthma or eczema in Chinese children
Authors: Sy Hing Y. , Chan Iris H.S. , Hon Ellis K.L. , Kong Alice P.S. , Tang Nelson L.S. , Li Chung Y. , Wong Gary W.K. , Waye Mary M.Y. , Lam Christopher W.K. , Chan Juliana C.N. , Leung Ting F. 
Published: August 2010

AbstractPositional cloning and candidate gene studies in different Caucasian populations identified the gene encoding plant homeodomain zinc finger protein 11 (PHF11) to be associated with asthma and eczema. Microarray analysis also confirmed increased PHF11 expression in type 1 T‐helper lymphocytes. However, such disease associations are unclear in Asian subjects. This case–control genetic association study investigated the relationship between asthma and eczema phenotypes and tagging single‐nucleotide polymorphisms (SNPs) of PHF11 in Hong Kong Chinese children. Three hundred and nineteen asthmatic children and 236 children with eczema were recruited from hospital clinics and 445 children without any history of allergic disease were recruited as controls from local schools and hospitals. Atopy was defined by the presence of allergen‐specific IgE in plasma or positive skin prick tests with wheal ≥3 mm larger than negative control. Lung function of asthmatics was evaluated by pre‐bronchodilator spirometry. Ten PHF11 SNPs were genotyped by multiplex SNaPshot™ assay. Genotyping call rates were 100% for all SNPs, which also followed Hardy–Weinberg equilibrium. These SNPs were tightly linked in one haplotype block (D′ ≥ 0.95 for nearly all SNP pairs). Physician‐diagnosed asthma was weakly associated with PHF11 +20860 and +22818 (P = 0.032 for both). Atopy was also associated with PHF11 +22398 (P = 0.029). However, none of the PHF11 SNPs was associated with eczema diagnosis and plasma total IgE and spirometric parameters in our patients. Our findings do not support PHF11 to be a major candidate gene for asthma, eczema and aeroallergen sensitization in Chinese children. Pediatr. Pulmonol. © 2010 Wiley‐Liss, Inc.
Use of post‐exercise laryngoscopy to evaluate exercise induced dyspnea
Authors: McNally P. , Greally P. 
Published: August 2010

AbstractWe present the case of a child with asthma who continued to have marked exercise induced dyspnea despite appropriate treatment, and in the face of adequate control of all other asthma symptoms. Spirometry showed a marked truncation of inspiratory flow, and laryngoscopy performed immediately after exercise showed laryngomalacia with dynamic, partial inspiratory obstruction. Exercise induced laryngomalacia (EIL) is a rare cause of exercise induced dyspnea which is diagnosed by post exercise flexible laryngoscopy and may require supraglottoplasty. Pediatr Pulmonol. 2010; 45:1037–1039. © 2010 Wiley‐Liss, Inc.
Attenuation of pulmonary hypertension secondary to left ventricular dysfunction in the rat by Rho‐kinase inhibitor fasudil
Authors: Dai Zen‐Kong , Wu Bin‐Nan , Chen I‐Chen , Chai Chee‐Yin , Wu Jiunn‐Ren , Chou Shah‐Hwa , Yeh Jwu‐Lai , Chen Ing‐Jun , Tan Mian‐Shin 
Published: August 2010

AbstractPulmonary hypertension (PH) in left ventricular dysfunction is attributable not only to backward failure of the left ventricle, but also to increased pulmonary vascular resistance (PVR) in some patients. Recently, Rho‐kinase has been known as a potent growth stimulator and mediator of vasoconstriction, and Rho‐kinase inhibitors could ameliorate PVR, little is known about the role of Rho‐kinase in left ventricular dysfunction‐induced PH. We utilized the ascending aortic‐banded rat and assessed the effect of Rho‐kinase inhibitor fasudil on the development of PH secondary to left ventricular dysfunction. Subsequently, in rats subjected to aortic banding for 6 weeks, there were increases in mean pulmonary arterial pressure, pulmonary arteriolar medial thickness, active RhoA, Rho‐kinase II, Rho‐kinase activity, endothelial nitric oxide synthase (eNOS) and endothelin‐1(ET‐1) concomitant with decreased levels in NO and cGMP in the lung. Treatment with fasudil at a dose of 30 mg/kg/day from days 1 to 28 or from days 29 to 42 decreased the mean pulmonary arterial pressure by 57% and 56%, right ventricular hypertrophy by 31% and 30%, pulmonary arteriolar medial thickness by 50% and 50%, and pulmonary expression of Rho‐kinase II by 41% and 28%, respectively, as well as augmented pulmonary expression of eNOS by 16% and 31% and NO by 50% and 76%, respectively, when compared with the vehicle controls. In conclusion, these results suggest that inhibition of Rho‐kinase may provide therapeutic potential for preventing and attenuating the development of PH in left ventricular dysfunction. Further translational study in human is needed to substantiate the findings. Pediatr Pulmonol. 2011; 46:45–59. © 2010 Wiley‐Liss, Inc.
The intermembrane space domain of Tim23 is intrinsically disordered with a distinct binding region for presequences
Authors: de la Cruz Laura , Bajaj Rakhi , Becker Stefan , Zweckstetter Markus 
Published: August 2010

AbstractProteins targeted to the mitochondrial matrix are translocated through the outer and the inner mitochondrial membranes by two protein complexes, the translocase of the outer membrane (TOM) and one of the translocases of the inner membrane (TIM23). The protein Tim23, the core component of TIM23, consists of an N‐terminal, soluble domain in the intermembrane space (IMS) and a C‐terminal domain that forms the import pore across the inner membrane. Before translocation proceeds, precursor proteins are recognized by the N‐terminal domain of Tim23, Tim23N (residues 1–96). By using NMR spectroscopy, we show that Tim23N is a monomeric protein belonging to the family of intrinsically disordered proteins. Titrations of Tim23N with two presequences revealed a distinct binding region of Tim23N formed by residues 71–84. In a charge‐hydropathy plot containing all soluble domains of TOM and TIM23, Tim23N was found to be the only domain with more than 40 residues in the IMS that is predicted to be intrinsically disordered, suggesting that Tim23N might function as hub in the mitochondrial import machinery protein network.
Evidence for an association between prostate cancer and chromosome 8q24 and 10q11 genetic variants in African American men: The flint men's health study
Authors: Wang Yunfei , Ray Anna M. , Johnson Emilie K. , Zuhlke Kimberly A. , Cooney Kathleen A. , Lange Ethan M. 
Published: August 2010

AbstractBACKGROUNDProstate cancer is the most commonly diagnosed non‐skin cancer in men in the United States and the second leading cause of cancer‐related mortality. African American men have substantially increased risk of both being diagnosed and dying from the disease. Recent genome‐wide genetic association studies have identified a number of common single nucleotide genetic polymorphisms (SNPs) that are associated with prostate cancer in men of European descent. Only a small number of studies have evaluated the association between these genetic variants and prostate cancer in African Americans.METHODSWe used logistic regression models to assess the association between prostate cancer in African American men and 24 SNPs from regions previously reported to be associated with prostate cancer in men of European descent.RESULTSWe found nominal evidence (P < 0.05) for association between prostate cancer and three chromosome 8q24 (rs6983561, rs16901979, and rs7000448) and two 10q11 (rs7904463 and rs10740051) SNPs.CONCLUSIONSWe confirm recent reports that 8q24 variants identified to be associated with prostate cancer in men of European descent are also associated with prostate cancer in African Americans. Our report is the first to find evidence of association between SNPs near MSMB and prostate cancer in African Americans. Of note, rs7000448 is in strong linkage disequilibrium with rs10761581 in NCOA4, a SNP that has been implicated to be independently associated, with respect to the widely reported SNP rs10993994 in the nearby gene MSMB, with prostate cancer in men of European descent. Prostate 71:225–231, 2011. © 2010 Wiley‐Liss, Inc.