bluuebunny/crossref_metadata_2025_split huggingface dataset:
Wide locking range divide‐by‐3 injection‐locked frequency divider using differential‐injection linear mixers and dual frequency tuning
Authors: Wang Chien‐Chin , Chen Chang‐Zhi , Lin Yo‐Sheng 
Published: October 2015

AbstractA wide locking‐range Ka‐band CMOS divide‐by‐3 injection‐locked frequency divider (ILFD3) using differential‐injection linear mixers and dual frequency‐tuning is demonstrated in a standard 0.18 μm CMOS technology. Divide‐by‐3 and low‐voltage operation were achieved by the differential‐injection linear mixers, which constitute two source‐connected series NMOSFETs in parallel with the LC tank. In addition, two pairs of varactors were adopted to enhance the ratio of variable capacitance to the overall capacitance of the LC tank. This in turn results in an increase of the locking range (LR). Furthermore, a bypass capacitor was added to the drain terminal of the head current source to eliminate its noise contribution. The ILFD3 consumed 5.28 mW from a 1.5 V power supply. Measurement result shows the proposed ILFD3 achieved a state‐of‐the‐art 19.84% (31.29–38.18 GHz) locking range and an excellent output phase‐noise of −130.1 dBc/Hz at 1 MHz offset. The chip area was only 0.87 × 0.72 mm2 excluding the test pads. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2622–2626, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26307
Formation of bowtie‐shaped excitation in a photonic–microfluidic integrated devices
Authors: Watts Benjamin R. , Kowpak Thomas , Zhang Zhiyi , Xu Chang‐Qing , Zhu Shiping 
Published: October 2015

AbstractNarrowly confining the beam intensity in a well‐defined region in the center of cell flow is a necessary step to perform reliable flow cytometry testing but has so far not been achieved in a photonic–microfluidic integrated device.We were able to focus the excitation beam to a very narrow bowtie shape with a near uniform intensity across the flow stream for excitation for a flow cytometry application. Beam geometry was achieved by integrating a one‐dimensional lens system with planar waveguides and a microfluidic channel on one substrate using one patterning material via a one‐shot process. This letter reports the method used to achieve such shaped beams and the performance of the shaped beams. © 2011 National Research Council Canada & Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2583–2586, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26309
Sixteen‐by‐sixteen array of series‐fed aperture‐coupled microstrip patch antennas
Authors: Soliman E. A. , Vasylchenko A. , Volski V. , De Raedt W. , Vandenbosch G. A. E. 
Published: October 2015

AbstractA new recursive technique of building series‐fed arrays is introduced in this paper. This technique is based on a series‐feeding network that distributes the input power uniformly among four output ports. If these output ports are terminated by four radiating elements, a one‐by‐four array is obtained. If four such arrays are connected using the same network, a four‐by‐four array can be constructed. Similarly, the same series‐feeding network is used to connect four of the previously obtained four‐by‐four arrays to realize a four‐by‐sixteen array. Finally, four of these arrays are connected together to achieve the desired sixteen‐by‐sixteen array. The single element used for this research is an aperture‐coupled square microstrip patch. All the proposed arrays are fabricated using Printed Circuit Board technology. Detailed theoretical analysis, via two well‐known packages, in addition to experimental characterization is performed. The results show that the proposed arrays enjoy wideband behavior, low‐cross‐polarization level, symmetric broadside radiation patterns, low‐side‐lobe level, reasonable front‐to‐back radiation ratio, high directivity, and good gain. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2705–2711, 2011; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.26310
Performance analysis of metallic carbon nanotubes as nanotechnology circuit interconnects
Authors: Parkash Vidur , Goel Ashok K. 
Published: October 2015

AbstractCarbon nanotubes (CNTs) have emerged as a potential nanoelectronic material that can replace traditional copper as the material for very large scale integrated circuits (VLSI) interconnects.In this article, we have quantified the performance expected out of CNTs‐based interconnect systems based on realistic characterization of their Tomonaga Luttinger theory‐based transmission line model. We have presented performance estimates for bus systems consisted of single‐walled nanotubes and crystalline bundles of CNTs. Results indicate that the bundles offer at leasta 10 times performance advantage over isolated nanotubes. However, this is at the expense of larger signal damping associated with them. Published 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2505–2508, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26314
Planar multiband antenna for multistandard mobile handset applications
Authors: Abbosh A. M. , Dadgarpour A. 
Published: October 2015

AbstractA planar antenna for multiband operation is presented.The proposed microstrip‐fed antenna includes a slotted ground plane, a T‐shaped radiator, meandered and open circuit strips. A return loss of better than 10 dB is achieved at the frequency bands personal communication system (PCS) (1850–1990 MHz), UMTS (1920–2170 MHz), WiBro (2300–2390 MHz), WLAN + Bluetooth (2400–2480 MHz), WiMAX (2500–2690 MHz), and WiMAX (3400–3600 MHz). If a return loss of 6 dB is considered as a standard, the antenna can cover DCS (1710–1880 MHz). The proposed antenna occupies a small volume of 40 × 30 × 1.6 mm3, which makes it attractive to the portable devices. The simulated and measured performance of the antenna confirms its multiband operation and omnidirectional radiation pattern. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2700–2703, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26319
Design of a novel UWB omnidirectional semicircular disk antenna
Authors: Zhang Pengyu , Chen Lijia , Qiu Jinghui 
Published: October 2015

AbstractIn this article, a novel omnidirectional semicircular disk antenna is investigated both numerically and experimentally.Two prototypes of different dimensions are fabricated and measured, resulting in a best impedance bandwidth ratio of more than 80:1. The antenna is considerably promising for future ultrawide‐band applications. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2497–2501, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26328
Vertical‐cavity surface‐emitting laser based digital coherent detection for multigigabit long reach passive optical links
Authors: Rodes Roberto , Jensen Jesper Bevensee , Zibar Darko , Neumeyr Christian , Rönneberg Enno , Rosskopf Juergen , Ortsiefer Markus , Monroy Idelfonso Tafur 
Published: October 2015

AbstractWe report on experimental demonstration of digital coherent detection based on a directly modulated vertical‐cavity surface‐emitting laser with bit rate up to 10 Gbps. This system allows a cooler‐less, free running, and unamplified transmission without optical dispersion compensation up to 105 km at 5 Gbps long reach passive optical links. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2462–2464, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26331
Broadband and size‐reduced microstrip antenna with double T‐feed for UHF RFID tags
Authors: Tang Zhi‐Jun , Zhan Jie , He Yi‐Gang 
Published: October 2015

AbstractA novel radio frequency identification tag antenna at 915 MHz using a bent meandered strip, a U‐microstrip patch and an adjustable double T‐feed is proposed, which is suitable for attaching to dry objects with various content. The antenna's size is 21.2 × 63.0 mm2. The antenna achieves 400 MHz bandwidths, 1.60 dBi gains, and a good radiation pattern. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2697–2699, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26332
Fabrication and measurement of DR19/PMMA‐based electro‐optic switch with nanosecond response time
Authors: Jin Lin , Cao Zijian , Wang Xibin , Ma Chunsheng , Zhang Daming 
Published: October 2015

AbstractIn this article, a novel guest–host nonlinear optical material is synthesized by using poly(methylmethacrylate) as the host and Disperse Red 19 as the guest. This material can be synthesized easily. A high cost‐performance electro‐optic switch using the coplanar waveguide electrodes operating at 1550 nm has been designed and fabricated. Switching time of device is less than 114 ns. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2653–2657, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26334
Limit for the proportion of remaining samples in the mode‐stirred chamber sample selection technique
Authors: Hallbjörner Paul , Sánchez‐Heredia Juan D. , de los Reyes Elias , Sánchez‐Hernández David A. 
Published: October 2015

AbstractAn expression is derived for the maximum proportion of remaining samples in the sample selection technique for mode‐stirred chamber measurements. The limit is independent of the selection algorithm used. The limit is verified in simulations as well as measurement examples. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2608–2610, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26336
Viable multiconductor spiral inductor design on silicon substrate with effective broadband shielding
Authors: Chiang Meng‐Ju 
Published: October 2015

AbstractThe viable multiconductor spiral inductor designs on the silicon substrate with effective broadband shielding are presented. The synthetic edge‐coupled transmission line (TL), which is operated in the even mode, is applied to realize the spiral inductor and provide the mesh ground shielding on the conventional silicon substrate for a well‐defined interface with the system integration. The proposed two types of spiral inductors are fabricated by the standard 0.18‐μm CMOS technology. For the high‐quality factor (Q‐factor) design, the measured result shows that the proposed inductor has the maximum Q‐factor of 6.5 at 24.0 GHz, which is the same with that of conventional design without shielding ground plane. For the high‐inductance design, the proposed shielded inductor reveals the inductance of 0.39 nH and Q‐factor of 4.9 at 16.0 GHz, respectively, indicating 13.5% higher and 16.1% lower than that of the conventional design. Furthermore, the coupling between the two adjacent spiral inductors with edge‐to‐edge spacing of 80.0 μm is 60.0‐to‐80.0 dB, indicating approximately more than 40.0 dB improvement against reference design. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2488–2492, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26343
Electrically Controlled Fast Response Cascading Tunable Polymer Dispersed Liquid Crystal Focusing Lenses
Authors: Kun Gui , Jihong Zheng , Kangni Wang , Menghua Zhang , Caihong Guo , Zengjun Zhou , Songlin Zhuang 
Published: October 2015

ABSTRACTWe experimentally demonstrated an electrically controlled variable focus optical system based on cascading polymer dispersed liquid crystal (PDLC) lens. Through adjusting external electric field applied on the hole‐type electrode of PDLC lens to change the spatial distribution of refractive index of PDLC, the plane PDLC cell can be functioned as a focusing lens with the variable focus length. In this article, we simulate the electromagnetic field distribution of the external electrical field, as well as analysis the corresponding principle and mathematic equation of its electrically controlled focusing length. The experimental results show that as external alternate current (AC) voltage is increased from 0 to 80 V, the focal length of single lens decreases from
to 1.073 m, and that of the double lens from
to 0.484 m. These experimental results are in good accordance with the simulation results. The experimental response time of PDLC tunable lens is less than 1 ms, which will bring benefits for the applications especially for the fast imaging system. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2830–2835, 2013
A Dual Band U‐Slot Printed Antenna Array for Lte and Wimax Applications
Authors: Ali Muhsin , Khawaja Bilal A. , Tarar Munir A. , Mustaqim Muhammed 
Published: October 2015

ABSTRACTIn this article, a dual‐band coaxial‐fed 2 × 2 rectangular U‐Slot microstrip patch antenna array for multiple input multiple output applications, in 4G long term evolution (LTE) and WiMAX systems, is presented. The targeted frequency bands are: (1) LTE Band‐1 at 2.1 GHz, and (2) WiMAX at 3.5 GHz. Simple design procedure and optimization techniques are discussed to achieve the desired parameters. Antenna design and simulation is performed in Agilent ADS Momentum using RT/Duroid substrate (εr = 2.2 and h = 3.175 mm). Substrate losses are also taken into account during design and simulation processes. The antenna is fabricated and characterized, and a comparison between the simulated and measured antenna is presented. The achieved impedance bandwidths/gains (determined by benchmark of voltage standing wave ratio ≤ 2) reach 2.4%/11.1 dBi and 2%/6.6 dBi for 2.1 and 3.5 GHz bands, respectively. The proposed antenna can be used as a template to form larger arrays. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2879–2883, 2013
W‐Band RF‐Mems Dicke Switch Networks in a Gaas MMIC Process
Authors: Reyaz Shakila Bint , Samuelsson Carl , Malmqvist Robert , Seok Seonho , Fryziel Michel , Rolland Paul‐Alain , Grandchamp Brice , Rantakari Pekka , Vähä‐Heikkilä and Tauno 
Published: October 2015

ABSTRACTA novel design of a W‐band RF‐microelectro‐mechanical‐system (RF‐MEMS) Dicke switch network realized in a GaAs monolithic microwave integrated circuit process is presented in this article (including a BenzoCycloButene cap type of 0‐level package used as protection during wafer dicing). Such fabricated GaAs MEMS Dicke switch circuits show transmission losses of 1.3–1.7 dB (uncapped on‐wafer), 1.6–2.0 dB (uncapped chips), and 1.8–2.7 dB (0‐level packaged chips) at 70–96 GHz. Corresponding measured maximum values of switch isolation equal 23, 26, and 27 dB, respectively. To the authors' knowledge, these are the first reported uncapped and wafer‐level packaged W‐band low loss/DC power and high isolation/linearity RF‐MEMS Dicke switch circuits made in a GaAs foundry process. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2849–2853, 2013
A New Method to Determine Parasitic Capacitances for HEMTs
Authors: Shen Li , Chen Bo , Fan Caiyun , Gao Jianjun 
Published: October 2015

ABSTRACTA new direct extraction method for the determination of the parasitic capacitances of HEMTs is presented in this article. This method is based on a physically meaningful depletion‐layer model and the theoretical analysis of the two‐port network for the pinch‐off cold FETs. The main advantage of this approach is that parasitic capacitance Cpg, Cpd, and Cpdg can be extracted under different pinch‐off conditions. Good agreement is obtained between modeled and measured results for 2 × 20 μm gate width HEMT (number of gate fingers × unit gate width). © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:3005–3007, 2013
Multiple‐Wavelength Sagnac Loop Based Microwave Photonic Notch Filter with Low Group Delay Ripple
Authors: Wang X. , Chan E. H. W. , Minasian R. A. 
Published: October 2015

ABSTRACTA new multiple‐tap microwave photonic notch filter structure that can realize a flat group delay, while simultaneously obtaining a narrow notch filter response, is presented. It is based on using wavelength division multiplexed light circulating in a Sagnac loop. Experimental results are presented that verify the new concept. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2938–2942, 2013
Tri‐Mode Wideband Bandpass Filter with Controllable Bandwidths using Shunted Short‐ and Open‐Stub Loaded Resonators
Authors: Wu Xiao‐Hu , Chu Qing‐Xin 
Published: October 2015

ABSTRACTThis article presents a high‐selectivity tri‐mode wideband bandpass filter. The shunted short‐ and open‐stub loaded resonators are analyzed that three modes are generated and combined within the passband. Circuit parameter analysis shows that the lower and upper passband bandwidths can be independently controlled, which can simplify the design and optimize process. Besides, two transmission zeros are generated at the lower and upper stopband to supply a very sharp passband selectivity. The prototype filters' performance is validated through both simulations and experiments, where good agreement can be observed. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2864–2866, 2013
The relationship between physical symptoms and health‐related quality of life in oculopharyngeal muscular dystrophy
Authors: Youssof Sarah 
Published: October 2015

ABSTRACTIntroductionOculopharyngeal muscular dystrophy (OPMD) causes ptosis, dysphagia, and limb weakness. Health‐related quality of life (HRQoL) and its relationship to physical symptoms was investigated.MethodsThe 36‐item Short Form (SF‐36) was completed by 89 participants in the U.S. OPMD Registry. Multiple hierarchical regression was used to determine the relative contributions of dysphagia severity and lower extremity functional impairment to the physical (PCS) and mental (MCS) components of the SF‐36.ResultsHRQoL was reduced in OPMD compared with population norms. Lower extremity functional impairment explained a significant proportion of variance in PCS and MCS. Dysphagia symptom severity explained a moderate amount of variance only in MCS. Dysphagia symptom severity had the strongest associations with general health perception and social functioning domains.ConclusionsLower extremity functional impairment in OPMD deserves attention due to its large influence on HRQoL. Both generic and dysphagia‐specific measures are necessary to assess HRQoL in OPMD. Muscle Nerve 53: 694–699, 2016
On the Lanczos and Golub–Kahan reduction methods applied to discrete ill‐posed problems
Authors: Gazzola Silvia , Onunwor Enyinda , Reichel Lothar , Rodriguez Giuseppe 
Published: October 2015

SummaryThe symmetric Lanczos method is commonly applied to reduce large‐scale symmetric linear discrete ill‐posed problems to small ones with a symmetric tridiagonal matrix. We investigate how quickly the nonnegative subdiagonal entries of this matrix decay to zero. Their fast decay to zero suggests that there is little benefit in expressing the solution of the discrete ill‐posed problems in terms of the eigenvectors of the matrix compared with using a basis of Lanczos vectors, which are cheaper to compute. Similarly, we show that the solution subspace determined by the LSQR method when applied to the solution of linear discrete ill‐posed problems with a nonsymmetric matrix often can be used instead of the solution subspace determined by the singular value decomposition without significant, if any, reduction of the quality of the computed solution. Copyright © 2015 John Wiley & Sons, Ltd.
Third trimester ultrasound for the prediction of the large for gestational age fetus in low‐risk population and evaluation of contingency strategies
Authors: Pilalis Athanasios , Souka Athena P. , Papastefanou Ioannis , Michalitsi Vasiliki , Panagopoulos Perikles , Chrelias Charalambos , Kassanos Dimitrios 
Published: October 2015

ABSTRACTObjectiveEvaluation of the effectiveness of third trimester fetal biometry and Doppler studies in predicting the birth of a large for gestational age neonate (LGA ≥ 95th centile). Assessment of the value of integrated models (combining maternal characteristics, first trimester parameters, third trimester fetal biometry) and the usefulness of contingency strategies.MethodObservational cross‐sectional study on 2308 uncomplicated singleton pregnancies examined at 11 to 14 weeks and at 30 to 34 weeks.ResultsUltrasound estimated fetal weight (EFW, area under the curve (AUC) = 0.83) was the best single predictor of LGA. Maternal weight, delta nuchal translucency and EFW were independent predictors for the integrated model, but the latter was not statistically better (AUC = 0.84) than using EFW alone. The detection rates for LGA were 72.5% and 73.7% for a 25% screen positive rate, by EFW and the third trimester integrated model respectively.A contingency strategy of rescanning 50% of the population in the third trimester according to the risk estimation by a first trimester prediction model results in detection rate of 64.7% for LGA for the same 25% screen positive rate (AUC = 0.78).ConclusionsThird trimester ultrasound is an effective screening modality for identifying fetal macrosomia. A contingency strategy utilizing first trimester parameters can reduce the need for unnecessary examinations. © 2012 John Wiley & Sons, Ltd.
Polymers and nanocomposites: synthesis and metal ion pollutant uptake
Authors: Rivas Bernabé L , Sánchez Julio , Urbano Bruno F 
Published: October 2015

AbstractThis paper is an overview of the versatile polymer materials containing different functional groups at the main or side chain to remove hazardous inorganic species. These materials include water‐insoluble, nanocomposite and water‐soluble polymers. Water‐insoluble polymers and nanocomposites are used in adsorption and ion exchange processes, whereas water‐soluble polymers are employed with ultrafiltration membranes in the liquid‐phase polymer‐based retention technique. © 2015 Society of Chemical Industry
Enhanced authentication for commercial video services
Authors: Huang Xinyi , Chu Cheng‐Kang , Sun Hung‐Min , Zhou Jianying , Deng Robert H. 
Published: October 2015

ABSTRACTThe advance in information technology has made video service a market with great commercial value. As an example, in‐vehicle infotainment has been introduced to vehicles with which customers can enjoy subscribed media services wherever they are. This paper investigates the authentication in commercial video services using a recently proposed protocol, the Sun–Leu protocol, as baseline. Several important security and performance requirements are revisited, including mutual authentication, anonymous authentication, one‐to‐many delivery, low communication cost and the security against replay attacks. We provide a detailed analysis of the Sun–Leu protocol against these requirements, based on which an enhanced authentication scheme is proposed. The new scheme is designed within the framework of the Sun–Leu protocol, preserves all merits of the original protocol and provides a higher level of security for video communication services. Copyright © 2012 John Wiley & Sons, Ltd.
Plasmaunterstützte DLC‐Beschichtung von Kunststoffen
Authors: Fischer Christian B. , Bernsmann Falk , Ajaj Wassim , Rohrbeck Magdalena , Busch Heinz , Kessler Barbara , Wehner Stefan 
Published: October 2015

AbstractDas Aufwachsen von diamantähnlichem Kohlenstoff (DLC) auf Polyethylene (PE) geht einher mit der Bildung einer Zwischenschicht. Dabei verändert sich die ursprüngliche Oberflächenstruktur des Kunststoffes und geht schrittweise in die ungeordnete Struktur der DLC‐Schicht über.Bevor DLC im Kohlenwasserstoffplasma mittels PECVD‐Methode aufgebracht werden kann, werden alle Substrate unter Verwendung eines Sauerstoffplasmas gereinigt. Dieser erste Teilschritt ist extrem wichtig für das Aufwachsen der DLC‐Schicht, da hierbei die Probenoberfläche bereits abgetragen und teilweise eingeebnet wird.Kunststoffe können durch DLC‐Beschichtung erfolgreich in der Stabilität verbessert und mit zusätzlichen Eigenschaften und neuen Funktionalitäten ausgestattet werden. Erste mikroskopische Erklärungen für die makroskopischen Phänomene und anwendungsrelevante Fragen konnten aufgezeigt werden. Außerdem werden die Grenzen der Machbarkeit thematisiert. Die hier vorgestellten Methoden werden nun auf weitere Materialien und Beschichtungen angewandt.