bluuebunny/crossref_metadata_2025_split huggingface dataset:
All‐optical 3R regeneration based on the XPM effect of semiconductor optical amplifier
Authors: Yu Jinlong , Hu Hao , Zhang Aixu , Wang Yaotian , Zhu Likai , Wang Wenrui , Zhang Litai , Jing Wencai , Jia Dagong , Yang Enze 
Published: April 2008

AbstractWe propose a 40 Gb/s all optical 3R regeneration system. A high Finesse Fabry‐Perot (F‐P) filter (FSR = 40 GHz, finesse = 1012) and a gain‐saturated SOA are used to extract 40 GHz clock. Before the clock extraction, 40 Gb/s RZ optical signals are converted into a stable wavelength after noninverted wavelength conversion based on the XPM of a single SOA. In the all optical decision, dual SOAs in series were used to lengthen active region of SOA. The 40 Gb/s degraded RZ signals are regenerated based on the XPM of dual SOAs in series, when a 0.26‐nm OBPF is blue shifted with respect to the wavelength of extracted clock. The experimental results show better eye opening, the decreased timing jitter from 5 to 1.4 ps and the 15 dB improved optical signal to noise ratio (OSNR). © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1807–1810, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23473
Multiple resonances in arrays of spiral resonators designed for magnetic resonance imaging
Authors: Massaoudi S. , Huynen I. 
Published: April 2008

AbstractThis article analyzes a planar metamaterial made of spiral resonators (SRs) printed on a thin dielectric layer, and operating around 123 MHz for medical applications. The design is based on an analytical model using equivalent circuits. This approach enables to explain the origin of multiple resonant frequencies in SR metamaterials. Theoretical predictions are successfully validated by measurements carried out in the frequency range [100–140 MHz]. These properties lead to very interesting applications, such as compact antennas with high directivity or medical magnetic resonance imaging at 123 MHz. In particular our simulations show that a metamaterial slab formed by an array of spiral resonators is able to transport the magnetic image information across the slab without distortion. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1945–1950, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23474
A new directional coupler for UHF RFID reader
Authors: Wei Feng , Shi X. W. , Huang Q. L. , Chen D. Z. , Wang X. H. 
Published: April 2008

AbstractA conventional microstrip directional coupler has poor isolation due to its unequal phase velocity between the even and odd modes. In this article, a compact dual‐stub microstrip directional coupler for the UHF RFID reader is proposed. The operating frequency band is 902–928 MHz. It is found that the coupler can obtain a good isolation of −65 dB at 920 MHz. Modeling and simulation results are also presented which are in good agreement with measurement data. © Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1973–1975, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23495
A digitally controlled band‐switching VCO using switching inductors and capacitors in 0.18 μm CMOS
Authors: Chang Tienyu , Chen Jinghong , Lin Jenshan 
Published: April 2008

AbstractIn this article, a digitally controlled band‐switching voltage controlled oscillator (VCO) is designed and fabricated using TSMC 0.18 μm CMOS technology. Design considerations regarding the power requirement and the phase noise of the VCO are discussed. Eight bands are set by three bits, with one bit controlling switching inductors, and two bits controlling switching capacitors. The VCO covers 2.9–3.45 GHz and 3.6–4.3 GHz using varactors for continuous frequency tuning. Phase noise of the VCO stays constant around −110 dBc/Hz at 1 MHz offset for all bands. The fabricated VCO consumes 11 mA of current with 1.8 V supply voltage and has a small size of 730 μm × 660 μm. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1970–1973, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23496
Optimization of a nonuniformly slotted rectangular waveguide antenna
Authors: Hwang Keum Cheol 
Published: April 2008

AbstractOptimization of a nonuniformly slotted rectangular waveguide antenna is performed using comprehensive learning particle swarm optimization (CLPSO) for the design of a high‐efficiency, low‐sidelobe antenna with a cosecant‐squared beam. Mode‐matching method and the Fourier transform are used to analyze the nonuniformly slotted rectangular waveguide. The computational results show that the proposed optimizer with a fast convergent series solver is useful for the design and optimization of nonuniform slot arrays. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1935–1937, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23498
A low‐voltage divide‐by‐3 injection‐locked frequency divider
Authors: Lee Chien‐Feng , Jang Sheng‐Lyang 
Published: April 2008

AbstractThis study proposes a new low‐voltage divide‐by‐3 CMOS injection locked frequency divider (ILFD) fabricated in a 0.18‐μm CMOS process and describes the operation principle of the ILFD. The ILFD circuit is realized with a CMOS dynamic threshold voltage LC‐tank voltage‐controlled‐oscillator (VCO) with two injection MOSFETs. The self‐oscillating VCO is injection‐locked by third‐harmonic input to obtain the division order of three. Measurement results show that at the supply voltage of 0.36 V, the free‐running frequency is from 1.015 to 1.093 GHz. At the incident power of −10 dBm, the locking range is from the incident frequency 3.01 to 3.33 GHz. This is the lowest voltage ILFD ever reported in literatures. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1905–1908, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23499
An electromagnetically coupled dual‐band dual‐polarized microstrip antenna for WLAN applications
Authors: Sarin V. P. , Nishamol M. S. , Augustin Gijo , Mohanan P. , Aanandan C. K. , Vasudevan K. 
Published: April 2008

AbstractA new design of a dual‐band dual‐polarized electromagnetically coupled slot loaded square patch antenna, covering the WLAN 5.2 GHz and 5.8 GHz bands, achieving bandwidth enhancement by using tapered slot structure, is presented here. The proposed antenna covers 5.09–5.47 GHz and 5.7–5.88 GHz bands. Details of the antenna design along with experimental and simulated results are presented and discussed. © Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1867–1870, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23502
Novel optical performance monitoring techniques using jittered electro‐optical sampling pulses
Authors: Jong Kuo‐Chin , Tsao Hen‐Wai , Lee San‐Liang 
Published: April 2008

AbstractA novel performance monitoring technique is proposed to improve the versatility of performance monitoring by altering the sampling rate periodically. With this method, a low distortion histogram can be obtained and the convergency of the averaged Q‐factor (Qavg) with respect to the number of sampling points can be significantly enhanced. We can also obtain a higher linear relationship between Qavgand the real Q‐factor than conventional approaches can. The calculated results are independent of the difference between the data rate and sampling rate. The simulation shows that, with this scheme, smaller numbers of sampling points are needed to generate one histogram, so the estimation of the Q‐factor is much simpler and faster. © Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1831–1834, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23504
Improved implementation of the Mur first‐order absorbing boundary condition in the ADI‐FDTD method
Authors: Stefánski T. , Drysdale T. D. 
Published: April 2008

AbstractCurrent implementations of the Mur 1st‐order absorbing boundary condition (Mur1) in the alternating‐direction implicit finite‐difference time‐domain (ADI‐FDTD) method treat the intermediate (half‐step) variables as electromagnetic field quantities that are an approximate solution to Maxwell's equations. This approach is problematic because these variables represent nonphysical quantities. Here, we rederive the Mur1 boundary condition for both the one‐dimensional and three‐dimensional cases such that the intermediate (half step) values are updated in a manner that is consistent with the ADI‐FDTD scheme. We present numerical tests that show improved performance over existing Mur1 implementations in ADI‐FDTD. These results suggest that careful consideration of the derivation of the half‐step variable update equations for other special ADI‐FDTD boundary and material conditions may yield similar improvements. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1757–1761, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23508
Monopulse beam‐scanning planar array antenna in L band
Authors: Masa‐Campos J. L. , Sánchez‐Sevilleja S. , Dominguez‐Grano‐De‐Oro C. , Sierra‐Pérez M. , Fernández‐Jambrina José Luis 
Published: April 2008

AbstractA planar antenna is presented as part of a Signal Identification System working at 1.06 GHz. The antenna presents a monopulse radiation pattern. Likewise, a scanning of the main beam direction is achieved in a ±45° azimuth coverage. A limited 3 dB amplitude drop of the received signal at the edges of the angular scanning area is only permitted. Furthermore, a broad beamwidth is required in the single element of the array. A rectangular linearly polarized double stacked patch has been then designed, with a significant size reduction in the nonresonant length, to increase the azimuth beamwidth of the array single element. The whole antenna structure is composed of 18 elements, which have been distributed in six columns of three patches per column. The feeding network of the array has been developed in microstrip technology, with small individual circuits connected by coaxial cables, to reduce the global losses of the system. The designed compact antenna and the transmitting and receiving equipments will be placed inside a POD on the top part of an airplane. A prototype antenna has been manufactured and measured in three different beam pointing directions. Satisfactory results have been achieved in the entire frequency band. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1812–1819, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23516
A low‐power V‐band CMOS low‐noise amplifier using current‐sharing technique
Authors: Yang Hong‐Yu , Lin Yo‐Sheng , Chen Chen Chi 
Published: April 2008

AbstractA low‐power‐consumption 53‐GHz (V‐band) low‐noise amplifier (LNA) using standard 0.13 μm CMOS technology is reported. To achieve sufficient gain, this LNA is composed of four cascaded common‐source stages. Current‐sharing technique is adopted in the third and four stages to reduce the power dissipation. The output of each stage is loaded with an LC parallel resonance circuit to maximize the gain at the design frequency. This LNA achieved voltage gain (AV) of 14 dB, very low noise figure (NF) of 6.13 dB, input referred 1‐dB compression point (P1dB‐in) of −20 dBm, and input third‐order inter‐modulation point (IIP3) of −9 dBm at 53 GHz. It consumed only a very small dc power of 10.56 mW. In addition, the chip area was only 0.91 × 0.58 mm2, including all the test pads and bypass capacitors. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1876–1879, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23523
A band‐notched ring monoplole antenna
Authors: Wang Fa‐Jia , Yang Xue‐Xia , Zhang Jin‐Sheng , Gao Guo‐Ping , Xiao Jin‐Xiang 
Published: April 2008

AbstractA printed circular‐ring monopole antenna with band‐notched feature for UWB application has been presented and investigated. The band‐notched characteristic is achieved by inserting a circular arc slot on the ring radiator. Experimental results show that the proposed antenna meets the requirement of wide‐working bandwidth of 3.1–10.6 GHz with VSWR <2, while avoiding the interference with the 5 GHz WLAN band. The transfer functions of the antenna systems are given experimentally, and the parametric studies are performed numerically in this article. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1882–1884, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23524
Neural network approach for comodeling design of multichip module
Authors: El Zoghbi M. , Baillargeat D. , Bila S. , Verdeyme S. , Villemazet J. F. 
Published: April 2008

AbstractAn original comodeling approach based on neural network is proposed in order to optimize multichip modules (MCM). This approach permits to characterize and to optimize millimeter‐wave module behavior by taking into account electromagnetic phenomena. All the design procedure is implemented in a circuit software to reduce the simulation time. Encouraging results are obtained. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1770–1774, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23530
High‐gain multilayered antenna for wireless applications
Authors: Gupta R. K. , Kumar G. 
Published: April 2008

AbstractThis paper proposes an efficient high‐gain multilayered antenna for wireless applications. The prototype antenna consists of a microstrip antenna which fed single or multiple parasitic patches fabricated on a low cost easily available FR4 superstrate. The patches on superstrate are suspended in air at an integral multiple of λo/2. The structured is designed, fabricated and tested. The measured VSWR [lt] 2 at 5.725–5.875‐GHz frequency band. The proposed antennas with single parasitic patch provide 87% efficiency, SLL of −17 dB with an associated gain of 13.5 dB. The gain increases to 17.1 dB with three parasitic patches. The proposed structure can be packaged inside an application platform. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1923–1929, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23536
Adaptive sampling bicubic spline interpolation method for fast calculation of monostatic RCS
Authors: Liu Z. W. , Ding D. Z. , Fan Z. F. , Chen R. S. 
Published: April 2008

AbstractIn this article, an adaptive technique combined with the bicubic spline interpolation method is proposed to efficiently calculate the scattering from electrically large objects. The bicubic spline interpolation method is used to approximate the 2D monostatic RCS data on a set of nonuniform sampling nodes. The adaptive technique is employed to generate new sampling points automatically by using a coarse‐to‐fine hierarchy. Compared with some conventional extrapolation/interpolation methods, such as asymptotic waveform evaluation (AWE) method, our method can avoid calculating derivatives at each control point by using spline technique. Numerical results demonstrate that the novel method proposed in this article is able to approximate the 2D RCS data with high accuracy and efficiency. © Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1851–1857, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23540
Enhancement of broadband performance for on‐chip spiral inductors with inner‐patterned‐ground
Authors: Shi Jinglin , Sun Sheng , Zhong Xiong Yong , Gan Yeoh Wooi , Seng Yeo Kiat 
Published: April 2008

AbstractA set of on‐chip spiral inductors with novel inner‐patterned‐ground (IPG) is presented in this article to enhance the broadband performance. By grounding the simple center metal cross, the IPG structure, an additional inner ground path is formed, the input impedance of the spiral inductor is reduced at the higher frequency range. When compared with conventional inductors, the quality factor (Q) of the IPG inductors increases by 15–30% over the frequency range of 15–35 GHz. The IPG inductors can be modeled based on a simple lumped equivalent circuit. The extracted inductance and quality factors are verified by on‐wafer measurement up to 50 GHz. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1744–1746, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23545
An internal wideband monopole antenna for UMTS/WLAN dual‐mode mobile phone
Authors: Liu Yung‐Tao , Su Saou‐Wen 
Published: April 2008

AbstractAn internal wideband metal‐plate monopole antenna for mobile phone applications is presented. The antenna is easily fabricated by bending a single metal plate and suitable to be embedded within the casing of a mobile phone as an internal antenna. Moreover, the antenna shows a wide operating bandwidth of about 5 GHz (about 1.8–6.7 GHz), making it easy to cover the UMTS band (1920–2170 MHz) and the 2.4–GHz (2400–2484 MHz) and the 5.2/5.8‐GHz (5150–5350/5725–5825 MHz) WLAN bands for mobile/WLAN dual‐mode operation of a mobile phone. The proposed antenna is studied in detail, and the experimental and simulation results of the constructed prototype are also presented. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1741–1744, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23546
A linear, low‐power, wideband CMOS VCO for FM‐UWB applications
Authors: Georgiadis Apostolos , Detratti Marco 
Published: April 2008

AbstractA linear, low‐power, wideband 0.18‐μm CMOS VCO for UWB applications is presented, as part of a PLL‐based direct FM modulator for the 3.1–5‐GHz UWB band. It consists of a frequency control circuit and a differential ring core, coupled to the antenna output and the PLL prescaler by two single‐ended inverter buffers. The measured VCO exhibits a linear tuning range of 0.5–5.0 GHz, low power consumption of 2.5–10.5 mW, and an output power of −10 ± 1 dBm. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1955–1958, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23547
The effects of information on a queue with balking and phase‐type service times
Authors: Guo Pengfei , Zipkin Paul 
Published: April 2008

AbstractThis article generalizes the models in Guo and Zipkin, who focus on exponential service times, to systems with phase‐type service times. Each arriving customer decides whether to stay or balk based on his expected waiting cost, conditional on the information provided. We show how to compute the throughput and customers' average utility in each case. We then obtain some analytical and numerical results to assess the effect of more or less information. We also show that service‐time variability degrades the system's performance. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008
Wood flour as a secondary filler in carbon black filled of styrene butadiene/chlorosulphonated polyethylene rubber blend
Authors: Radovanović B. , Marković G. , Radovanovic A. 
Published: April 2008

AbstractA study is reported which aims to identify the optimum contents of wood flour (WF) to be introduced into styrene butadiene/chlorosulphonated polyethylene (SBR/CSM) rubber blend compounded with carbon black. A range of composite properties are considered including cure characteristics and mechanical properties, as well as the adhesion strength (rubber‐to‐metal bonding) behavior. Processing characteristic such as maximum torque increases with increasing of the concentration of WF up to 40 phr in SBR/CSM blend, whereas the scorch time and optimum cure time decreases. Results indicated that the tensile strength and tensile modulus, as well as shore hardness of the SBR/CSM composite in which SBR is predominant, increase in a compliance with the increase of WF. Adhesion strength value on peel between metal and WF filled SBR/CSM rubber blend increases when the filling level increases and the maximum value were observed at 40 phr of WF. The enhancement in mechanical properties was supported by data of crosslink density in these samples obtained from swelling measurement. Addition of WF was recommended as an economical and ecological benefit to industries as the properties of the rubber/carbon black composites remained unchanged with increasing WF content. POLYM. COMPOS., 2008. © 2008 Society of Plastics Engineers.
Thermal and dielectric properties of fiber reinforced polystyrene composites
Authors: Yu Suzhu , Hing Peter 
Published: April 2008

AbstractThermal and dielectric properties of polymer composites are important for many applications such as microelectronic packaging. In this work, glass fiber, alumina fiber, and carbon fiber reinforced polystyrene composites have been prepared with melt blending. The thermal conductivity, thermal expansion, and dielectric properties of the composites have been systematically studied as a function of fiber fraction. It is found that all the three types of the fibers, particularly the carbon fiber, can significantly increase the thermal conductivity and decrease the thermal expansion of the polymer. Moreover, the incorporation of the glass or alumina fibers does not have obviously adverse effect on the dielectric constant of the polymer. The thermal conductivities of the fibers reinforced composites have also been analyzed with Agari's model to reveal the conductive enhancement nature of the fibers to the polymer. POLYM. COMPOS., 2008. © 2008 Society of Plastics Engineers
Steroid‐sparing effect of omalizumab for allergic bronchopulmonary aspergillosis and cystic fibrosis
Authors: Zirbes Jacquelyn M. , Milla Carlos E. 
Published: April 2008

AbstractAllergic bronchopulmonary aspergillosis (ABPA) is a complication commonly encountered in patients with CF that produces significant respiratory morbidity. Chronic airway colonization with Aspergillus induces strong inflammatory responses with high IgE levels. Current guidelines for therapy include prolonged courses of systemic corticosteroids as the main therapeutic strategy. However this has the potential to induce significant detrimental side effects in children. Omalizumab is a humanized monoclonal antibody directed against IgE that prevents its binding to high‐ and low‐affinity receptors on effector cells. It has been shown to be effective in improving asthma control in patients with a strong allergic component. We present our long term experience with the use of Anti‐IgE therapy in three children with CF and ABPA (mean age at start of therapy 14.2 years) who were steroid dependent. All three were already experiencing significant side effects from chronic steroid therapy. After the start of Omalizumab these children have experienced significant and sustained clinical improvements at the same time that they were discontinued from chronic systemic steroids. Our experience suggests that IgE blockade has tremendous potential as a strategy to control this disease in steroid dependent patients. Pediatr Pulmonol. 2008; 43:607–610. © 2008 Wiley‐Liss, Inc.