bluuebunny/crossref_metadata_2025_split huggingface dataset:
A 6–10 GHz noncoherent IR‐UWB CMOS receiver
Authors: Ha Mincheol , Kim Jaeyoung , Park Youngjin , Eo Yunseong 
Published: June 2012

AbstractA noncoherent IR‐UWB receiver suitable to UWB high frequency band from 6 to 10 GHz is implemented using 0.18 μm CMOS technology.A proposed wideband single to differential circuit is adopted to remove the bulky external balun. The integrated RF active notch filter to reject the nearby 5 GHz WLAN interferers is used and the measured results shows more than 8 dB improvement in the minimum detection power with the −18 dBm jamming signal at 5.35 GHz. The measured sensitivity of receiver is from −75 to −70 dBm at 1 Mbps PRF. The current consumption of receiver is 20.5 mA at 1.8 V supply. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2007–2010, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26986
A triple band‐notched UWB printed antenna with various slots
Authors: Wang Chen , Yan Ze‐Hong , Xu Ping , Li Bo 
Published: June 2012

AbstractA printed antenna having triple frequency band‐notched functions for ultra‐wideband applications is proposed and studied.The antenna consists of a rectangular radiating patch with a staircase structure symmetrically in the bottom. With a pair of C‐shaped slots, a U‐shaped slot on the radiating patch and double I‐shaped slots on the ground plane, three frequency‐notched responses at 3.5/5.5/7.2 GHz are obtained. And, good radiation patterns and gains within the operating band have been observed. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2088–2091, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26989
DC–20‐GHz compact SPQT switch for butler matrix switched beam smart antenna system
Authors: Tsai Jeng‐Han , Shih Hung‐Da 
Published: June 2012

AbstractA DC–20‐GHz broadband and compact single‐pole‐quadruple‐throw (SPQT) switch for Butler matrix switched beam smart antenna system application has been designed and fabricated on 0.15‐μm GaAs pHEMT process. By adopting inductive high impedance transmission lines in series‐shunt switch topology, the SPQT switch demonstrates an insertion loss of 1.25–3.53 dB from DC to 20 GHz, and the isolation is higher than 22 dB with a compact chip size of 1.5 mm2. The measured output 1 dB compression point (OP1 dB) is 16 dBm at 12 GHz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2023–2026, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26993
A compact printed CPW‐fed UWB antenna with dual band‐notched characteristics
Authors: Ni Tao , Jiao Yong‐Chang , Li Wei‐Mei , Zhou Lei , Zhang Fun‐Shun 
Published: June 2012

AbstractIn this article, a compact printed coplannar waveguide fed UWB antenna with 3.5‐/5.8‐GHz band‐notched characteristics is proposed.The proposed antenna consists of an opening rectangle ring and and two resonating structures. One is inserted onto the terminal of the radiating patch and another is connected to the beginning of radiating patch via two metallic holes. The simulation and measurement show that the proposed antenna achieves an impedance bandwidth ranging from 3 to 11 GHz with the dual notched bands around 3.5 and 5.8 GHz. A nearly omnidirectional radiation pattern and constant grop delay are observed except around the two notched frequencies. In addition, the conceptual equivalent circuit models, which combined with input impedance, are also shown for further analysis of the band‐notched characteristics. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2194–2199, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26995
A printed coupled‐fed loop antenna with two chip inductors for the 4G mobile applications
Authors: Chen Wen‐Shan , Lee Bau‐Yi , Liu Yi‐Ting 
Published: June 2012

AbstractThis article proposes a meandered printed loop antenna for the fourth generation (4G) mobile system applications. Using a coupling strip connected with a 50 Ω microstrip fed‐line on front side, the loop antenna on back side is excited and a half wavelength (0.5 λ) resonant mode and its higher modes are successfully resonated. A plane copper strip connected at top of the loop antenna is used to increase the antenna's path and to decrease the lower operation band to cover LTE 700 band. Two 15 nH ceramic chip inductors, which are embedded in the loop antenna, are used to decrease the antenna's 1 and 1.5 λ resonant modes. The 0.5, 1, and 1.5 λ resonant modes get together to form a broad lower operation band (693–1031 MHz) for LTE 700 and GSM 850/900 applications. Beside, the antenna's higher resonant modes are also excited to form a broad higher operation band (1668–2781 MHz) for DCS, PCS, UMTS, LTE 2300, LTE 2500, and WLAN applications. The proposed antenna also has an advantage of small size, which is 114 × 50 mm2 including a loop antenna of 14 × 50 mm2 and a ground plane of 100 × 50 mm2. With the advantages of board band, compact size, low cost, and good performance, the proposed antenna appears to be an optimal candidate for the 4G mobile applications. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2157–2163, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26997
Compact self‐complementary antenna for ultra‐wideband applications
Authors: Huang Chih‐Yu , Chen Guan‐Han 
Published: June 2012

AbstractA self‐complementary antenna for ultra‐wideband (UWB) is proposed.The proposed antenna has a compact size of 25 × 15 mm and covers the specification for UWB operation in the 3.1–10.6‐GHz bands. It has been proven that the proposed compact antenna can generate UWB and reasonable radiating properties. Details of the proposed antenna design and experimental results are presented and discussed. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2144–2146, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27005
Design of double layer frequency selective surfaces with novel multiresonant elements for four‐frequency bands
Authors: Im Young Son , Choi Hak Keun , Park Jae Hyun 
Published: June 2012

AbstractA double layer frequency selective surface (DFSS) composed of modified square loop, cross dipole, and Jerusalem cross loop patch elements is presented to obtain angle and polarization insensitivity and a broad bandwidth. The presented DFSS reflects the X‐ and K‐band signals, while allowing the C‐ and Ku‐band signals to pass through. In this design, a four‐band FSS (including band‐stop FSS and band‐pass FSS) with a broad bandwidth is obtained by controlling the thickness of the air foam between the FSS layers. An equivalent circuit model is developed to provide insight into the response of the DFSS. Experimental verifications are carried out. The computed results agree well with the measured ones. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2153–2157, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27007
Design of triple‐band monopole antenna with meander line structure for MIMO application
Authors: Ojaroudi Nasser , Ojaroudi Mohammad , Halili Khodadad 
Published: June 2012

AbstractIn this article, a novel wireless local area network (WLAN) frequency range monopole antenna is designed and manufactured for multi‐input‐multi‐output (MIMO) applications. The proposed antenna consists of three pairs of folded L‐shaped strips are placed side by side and printed on a dielectric substrate to generate triple‐band operation which is suitable for WLAN applications. In this structure, each pair of L‐shaped strips monopole antenna can create additional resonances within the WLAN range, which the desired resonant frequencies are obtained by adjusting the dimension of the folded L‐shaped strips. The operating frequencies of the proposed antenna are 2.4/5.2/5.8 GHz which covers WLAN systems frequency range. Various configurations of array of this meander line structure monopole antenna for MIMO application are also studied. Prototypes of the proposed antenna have been constructed and studied experimentally. Good return loss and radiation pattern characteristics are obtained in the frequency band of interest. Simulated and measured results are presented to validate the usefulness of this proposed small antenna structure for MIMO applications. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2168–2172, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27008
Measurement and modeling of a UHF‐RFID system in a metallic closed vehicle
Authors: Azpilicueta Leire , Falcone Francisco , Astráin Jose Javier , Villadangos Jesús , Zuazola I.J. García , Landaluce Hugo , Angulo Ignacio , Perallos Asier 
Published: June 2012

AbstractIn this work, the characteristics radiopropagation of a wireless system within an indoor vehicle is presented. An analysis of the physical radio channel propagation inside a van full of dielectric buckets is presented based on three‐dimensional ray launching in house code. Simulation as well as measurement results from a real in‐vehicle scenario confirm the topological dependence and impact on a RFID system is shown. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2126–2130, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27010
A new iterative method to solve the method of moments based electromagnetic field problems
Authors: Rao Sadasiva M. 
Published: June 2012

AbstractIn this work, we present a new iterative method to solve electromagnetic field problems using the method of moments formulation.The new method requires much fewer mathematical operations per iteration when compared to other available methods. Further, the method can easily handle multiple right‐hand side vectors much the same way as direct solution techniques. Several numerical examples are presented to illustrate the efficiency and accuracy of the new method. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2042–2046, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27023
Spherical invisibility cloak with minimum number of layers of isotropic materials
Authors: Martins Tiago Carvalho , Dmitriev Victor 
Published: June 2012

AbstractWe designed a multilayered spherical invisibility cloak with minimum number of isotropic layers by particle swarm optimization technique. The optimization parameters are permittivity and permeability of the layers and their thicknesses. The objective function is the total scattering cross section. For the cloak with 13 layers, we achieved 99.9% reduction of total scattering cross section of the perfectly conducting sphere with radius r = 0.983λ. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2217–2220, 2012; View this article online at wileyonlinelibrary.com.). DOI 10.1002/mop.27024
Improved metal‐dielectric antennas in UMTS frequency band through extraordinary transmission elements
Authors: Illescas J. , Estévez A. , Falcone F. , Marcotegui A. 
Published: June 2012

AbstractIn this article, a UMTS/HSPA antenna is proposed, based on a stacked planar structure, where the combination of collimation by Enhanced Transmission and the use of parasitic director elements is used to achieve the desired specifications. Full wave simulation results, obtained using an in house developed FDTD code, as well as measurement results from a fabricated prototype are presented, showing good agreement. The proposed antenna can be useful for the deployment of minicell and microcell mobile base stations. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2181–2185, 2012; View this article online at wileyonlinelibrary.com.). DOI 10.1002/mop.27026
Planar wideband crossover with distortionless response using dual‐mode microstrip patch
Authors: Abbosh A. M. 
Published: June 2012

AbstractA microwave crossover using a dual‐mode microstrip patch is presented. The patch is designed to operate at two orthogonal modes. Each of those modes is used to couple a pair of face‐to‐face ports. The isolation between the two orthogonal modes is enhanced by using symmetrical slits in the microstrip patch. The proposed crossover has the main features of high‐power handling capability and distortionless response due to its extremely low group delay deviation. A prototype is designed to operate at the WLAN band from 5.15 to 5.85 GHz. The simulated and measured results indicate less than 0.06 ns deviation in the group delay, less than 1 dB insertion loss, more than 13 dB return loss and more than 12 dB isolation across the whole band. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2077–2079, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27028
A complementary cross‐coupled voltage‐controlled oscillator using differential active inductor
Authors: Jang Sheng‐Lyang , Chen Meng‐Hsin , Chang Chia‐Wei , Juang Miin‐Horng 
Published: June 2012

AbstractThis letter presents a new differential active inductor voltage‐controlled oscillator (VCO), which uses the complementary cross‐coupled pairs to generate differential negative resistance. The active inductor is formed with complementary CMOS. The proposed CMOS low‐phase noise VCO has been implemented with the United Manufacture Corp. (UMC) 90nm CMOS technology and the die area is 0.575 × 0.61 mm2. At the supply voltage of 0.9 V, the total power consumption is 4.5 mW. The free‐running frequency of VCO is tunable from 1.22 to 1.86 GHz as the tuning voltage is varied from 0.0 to 0.9 V. The measured phase noise at 1MHz offset is −111.56 dBc/Hz at the oscillation frequency of 1.22 GHz and the figure of merit of the proposed VCO is about −166.75 dBc/Hz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2039–2042, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27030
Circularly polarized nanoring antenna for uniform overheating applications
Authors: Soliman Ezzeldin A. 
Published: June 2012

AbstractA nanoring antenna is introduced for the first time in this article. This nantenna is made by etching a slot ring in a nanogold plate. The proposed nantenna can be easily tuned for operation at any wavelength of interest by varying the diameter of its ring. The proposed nantenna has a pair of hot‐spots that are aligned opposite to each other along a line passing through the center of the nanoring. The electric field intensity enhancement at the hot‐spots of the proposed nantenna is more than 2000 with a full‐width at half‐maximum of about 900 nm centered around 2500 nm wavelength. If excited with circularly polarized plane wave, the hot‐spots pair is rotating with time. This unique feature of the new nanoring makes it very attractive for cancer tumor overheating, as it allows for more uniform distribution of the concentrated heat than any other nantenna with fixed hot‐spot location. The proposed nantenna is thoroughly analyzed by means of two well‐known 3D electromagnetic solvers that agree very well with each other. The effect of varying the substrate refractive index below the nantenna is also investigated. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2209–2214, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27032
GREENING GROWTH THROUGH STRATEGIC ENVIRONMENTAL ASSESSMENT OF SECTOR REFORMS
Authors: Slunge Daniel , Loayza Fernando 
Published: June 2012

SUMMARYClimate change and escalating degradation of ecosystem services place the need for greening economic growth on the international policy agenda. To make growth greener and more inclusive, it is crucial to change the institutions and incentive structures in national sector reforms and to involve poor and vulnerable groups in decision making. The article analyses the role that strategic environmental assessment (SEA) of sector reforms can play in greening growth in developing countries and discusses implications for public administrations. We suggest that SEA can contribute to greening growth if it draws attention to environmental priorities when the sector reform agenda is set, fosters policy learning processes through repeated and sustained stakeholder interaction and facilitates access to information and empowerment of environmental constituencies. The empirical basis for the article is drawn from a recent World Bank pilot programme involving SEAs of different sector reforms (mining, forestry, urban planning, infrastructure) in Africa (Kenya, Malawi, Sierra Leone, Guinea, Liberia) and Asia (China, Bangladesh and Pakistan). Copyright © 2012 John Wiley & Sons, Ltd.
ENVIRONMENTAL INFORMATION TRANSPARENCY AND IMPLICATIONS FOR GREEN GROWTH IN CHINA
Authors: Li Wanxin , Li Duoduo 
Published: June 2012

SUMMARYEnvironmental information transparency performs social and learning functions indispensable for green growth. Still facing the challenges of a lack of local commitment and less than optimal institutional capacity, there is no doubt that China has made substantial progress on granting and enforcing public right to environmental information. This will help build the social infrastructure necessary for green growth — the rule of law, trust, social organizing, consensus building, social learning, and collective action. A focused approach is desirable because resources and capacity are limited in China — targeting pollutants and sectors that exert the most environmental and health risks as well as those that need technological upgrade most urgently. Then, in the long run, environmental information transparency serves the fundamental goals of ‘good public policy and legitimate governmental decision‐making’ on environment‐related issues in China, in line with both the green growth framework and the long‐term development goal of constructing a harmonious society in China. Copyright © 2012 John Wiley & Sons, Ltd.
ADVANCING THE GOVERNANCE OF CROSS‐SECTORAL POLICIES FOR SUSTAINABLE DEVELOPMENT: A METAGOVERNANCE PERSPECTIVE
Authors: Christopoulos Stamatios , Horvath Balazs , Kull Michael 
Published: June 2012

SUMMARYSustainable Development (SD) and its pillars are well known, and the need for integrating the social, economic and environmental aspects in development is widely accepted. A topic currently gaining momentum is the improvement of the institutional framework, as called for through the ongoing global processes for SD. This study probes into three successful cases of solutions for SD that effectively used metagovernance elements, that is, integrating and fusing different modes of governance. Metagovernance elements in policy mixes bring together, through coordination, formal conventions and less formal agreements of what is acceptable and appropriate administratively and policy‐wise, to solving complex issues in SD. Copyright © 2012 John Wiley & Sons, Ltd.
THE ROLE OF THE VISIBLE HAND OF PUBLIC INSTITUTIONS IN CREATING A SUSTAINABLE FUTURE
Authors: Glemarec Yannick , Puppim de Oliveira Jose A. 
Published: June 2012

SUMMARYA key challenge at the beginning of the 21st century is to de‐carbonize and de‐materialize the global economy in time to avoid irreversible changes to the global and local environment while generating enough social and economic development opportunities to reduce poverty and inequity. Four main ‘development paradigms’ dominate the contemporary public discourse on how to best meet this challenge and achieve the social, economic and environment pillars of sustainable development: (i) a growth‐focused development paradigm; (ii) a pro‐poor growth development paradigm; (iii) a green‐growth development paradigm; and (iv) a resilient growth development paradigm. Although these four development paradigms are usually perceived as mutually exclusive, the paper argues that they should be regarded as complementary, with each providing a necessary but in itself insufficient response to the challenge of sustainability. The new sustainable development paradigm will require a substantial transformation of the present economic development model analogous to what transition economies underwent during the industrial revolution. The paper discusses the political, managerial and social implementation challenges for this societal shift and finds that its success will depend on whether public administrations are adequately prepared to translate government policies into action at the different levels, negotiate conflicts and build trust among stakeholders. The paper concludes by summarizing some of the solutions advocated in the individual contributions to this Special Edition of PAD to strengthen the capacity of public administrations in creating a sustainable future. Copyright © 2012 John Wiley & Sons, Ltd.
Insights into the Mechanisms of Isopropanol Conversion on γ‐Al2O3 by Dielectric Barrier Discharge
Authors: Rivallan Mickaël , Fourré Elodie , Aiello Sébastien , Tatibouët Jean‐Michel , Thibault‐Starzyk Frédéric 
Published: June 2012

AbstractMechanisms of isopropanol (IPA) conversion on γ‐Al2O3 by dielectric barrier discharge plasma are elucidated by the means of operando Fourier transformed infrared spectroscopy. In that case, it is shown that the IPA conversion proceeds by successive steps. Firstly, via the oxidation of IPA into acetone by atomic oxygen and ozone produced in the plasma composed of dry air. Secondly, after aldolization of acetone into mesityl oxide at the surface of the γ‐Al2O3 catalyst. Thirdly, after fragmentation of mesityl oxide into acetaldehyde and isobutene. Such cascade reactions are only possible when a catalyst is placed in the discharge zone (in‐plasma catalysis). It initially supports the IPA molecules and then allows products condensation before their fragmentation.magnified image
Avoided level crossings in open quantum systems
Authors: Eleuch H. , Rotter I. 
Published: June 2012

AbstractAt high level density, two states avoid usually crossing at the critical value acr of the parameter a by which the system is controlled. The wavefunctions of the two states are mixed in a finite parameter range around acr. This holds true for discrete states as well as for narrow resonance states which are coupled via the environment of scattering wavefunctions. We study the influence of avoided level crossings onto four overlapping complex eigenvalues of a symmetric non‐Hermitian operator. The mixing of the two wavefunctions around acr is simulated, in each case, by assuming a Gaussian distribution around acr. At high level density, the Gaussian distributions related to avoided crossings of different levels may overlap. Here, new effects arise, especially from the imaginary part of the coupling term via the environment. The results show, moreover, the influence of symmetries onto the multi‐level avoided crossing phenomenon.
Braid operation of exceptional points
Authors: Kim S.W. 
Published: June 2012

AbstractWe review the characteristics of exceptional points (EPs) focusing on their braid operation. First we explain how the braid operation occurs in EPs using 2 × 2 non‐Hermitian matrix, and discuss the physical meaning of the coalescence of eigenvetors at the EP. We also show the relation between EPs and the so‐called exotic holonomy. Finally, we demonstrate a preliminary result on how to exploit the braid operation of EPs for topological quantum computation.