bluuebunny/crossref_metadata_2025_split huggingface dataset:
Authentic subcultural membership: Antecedents and consequences of authenticating acts and authoritative performances
Authors: Beverland Michael B. , Farrelly Francis , Quester Pascale G. 
Published: June 2010

AbstractThe postmodern consumer often finds authenticity in communities of consumption including those that are based around a focal brand. Two means through which authenticity can be achieved are an individual authenticating act or a collective authoritative performance. Using this dual lens, the contested nature of authenticity within subcultures is explored. Drawing on long, interpretive interviews with surfers, skaters, and snowboarders, it was found that the contested nature of authentic community membership is driven by different identity benefits, including flow and kinship. These two separate benefits lead members to engage different brand‐related cues when seeking an authentic brand partner. This paper advances the understanding of subcultural authenticity by identifying the diversity of identity goals sought from membership of consumption communities and by linking antecedents and outcomes of authenticity, and associated consumption behaviors. © 2010 Wiley Periodicals, Inc.
Wideband circularly polarized quasi‐spiral slot antenna
Authors: Ghalibafan Javad , Attari Amir Reza , Kashani Farokh Hojjat 
Published: June 2010

AbstractIn this article, a new slot antenna with a quasi‐spiral slot is proposed.A simple microstrip line feed is used to excite the slot antenna. Measurement results show that 10 dB return loss bandwidth and 3 dB axial ratio bandwidth of the proposed antenna are 87 and 43%, respectively. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2081–2083, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25360
Experimental evaluation of the diversity performance for a DVB‐SH mobile terminal
Authors: Poussot Benoit , Delcroix David , Laheurte Jean‐Marc , Dussauby Eric , Duval Régis 
Published: June 2010

AbstractThis article presents measurements performed with test infrastructures for digital TV broadcasting (DVB‐SH standard).The objective is to determine the diversity performance of a mobile terminal integrating two orthogonally polarized antennas in various sites. The performance evaluation is based on a narrow band analysis of the propagation channel. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2145–2148, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25361
A size reduced CRLH resonant antenna based on interdigital capacitors with defected ground structure
Authors: Lee M.‐J. , Pyo S. , Yoon W.‐S. , Shin I.‐C. , Kim Y.‐S. 
Published: June 2010

AbstractA new composite right/left‐handed (CRLH) resonant antenna with interdigital capacitors for a size reduction is proposed in this letter. This antenna consists of three sectional patches, two interdigital lines (capacitors) with a defected ground, and two shorting pins. A rectangular patch is split into three sections and each section is coupled with an interdigital line. When the proposed antenna is operated in the LH resonant mode, the antenna size is reduced by 33% and the antenna gain is increased by 7 dB as compared with one without defected ground structures. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2142–2145, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25362
Broadband CPW‐FED slot antenna with circular polarization
Authors: Jiang Lin‐Tao , Gong Shu‐Xi , Hong Tao , Jiang Wen 
Published: June 2010

AbstractA novel broadband circularly polarized slot antenna is presented in this article. The antenna is fed by a step‐shaped coplanar waveguide (CPW). A central symmetry slot is etched in the center of the patch to create circularly polarized wave. A rectangle slot beside the CPW is applied to improve the impedance characteristic of the antenna. The presented antenna has axial ratio and impedance bandwidth of around 33.3 and 71%. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2111–2114, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25363
Measurement and modeling of interference for multiple antenna system
Authors: Ananthanarayanan Sai , Magleby Alyssa , Furse Cynthia 
Published: June 2010

AbstractThis article provides a detailed signal model (DSM) based on network theory to predict the multiantenna capacity in the presence of co‐ and adjacent channel interference.This model expands on previous channel models by including the simultaneous effects of interference, antenna matching, efficiency, directivity and polarization. Single and multiantenna interference are modeled using both a statistical channel model and a site‐specific 3D ray tracer. The network theory based DSM was obtained by adding antenna front end effects at both the transmitter and receiver to the channel models. This model was validated with measurements performed in two underground tunnels. The site‐specific model predicted the capacity to within 1 bit/sec/Hz of the measurements while the statistical model was within 1‐2 bits/sec/Hz except for a few locations. It was also observed that for small antenna spacing the conjugate match provides higher capacity than the self match. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2031–2037, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25367
Ultra‐narrow band band‐pass filter using open loop resonator
Authors: Zhang F. 
Published: June 2010

AbstractAn ultra‐narrow band band‐pass filter with Square open loop resonator (SOLR) is reported in this article. The designed OLR cell demonstrates compact size, broad band‐stop and good slow‐wave effect. An ultra‐narrow band band‐pass filter, incorporated with three SOLR cells, is simulated and measured to show low‐insertion loss and high‐selectivity. Good agreements between simulation and experiment are achieved. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2029–2031, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25368
Ook modulator using photoconductive feedback oscillator
Authors: Faci Salim , Tripon‐Canseliet Charlotte , Alquié Georges , Formont Stephane , Chazelas Jean 
Published: June 2010

AbstractDesign approach and characterization of an integrated oscillator switched by an optical power are discussed. The oscillator is driven into oscillation at a frequency of 4.9 GHz under a light excitation power upper than a threshold value of 40 mW at a wavelength of 800 nm. On‐off Keying modulation of the oscillator is performed with a digital optical power modulation allowing thus direct data transfer from optical to microwave carrier by photoconductivity. Illumination of the oscillator with optical pulses reveals the generation of short oscillations. The number of the generated signal periods depends on the optical power level and optical pulses width. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2010–2016, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25371
Anfis models for the quasistatic analysis of coplanar strip line structures
Authors: Turkmen Mustafa , Yildiz Celal , Guney Kerim , Kaya Sabri 
Published: June 2010

AbstractIn this work, computer‐aided design models based on adaptive‐network‐based fuzzy inference system (ANFIS) for the quasistatic analysis of three different coplanar strip line structures are presented. These strip line structures are conventional coplanar strip lines, asymmetrical coplanar strip lines with infinitely wide strip, and asymmetrical coplanar strip lines with infinitely thick dielectric substrate. The design parameters of the proposed ANFIS models are optimally determined by using four different optimization algorithms, hybrid learning, simulated annealing, least‐squares, and genetic algorithm. When the performances of ANFIS models are compared with each other, the best results for training and test are obtained from the models trained with hybrid learning algorithm. There is a good agreement among the results of ANFIS models, quasistatic analysis, a full‐wave electromagnetic simulator IE3D, and experimental works realized in this study. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1990–1996, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25372
The design and realization of a highly linear power amplifier module for a WiMAX/WiBro (802.16e) base station
Authors: Kim Do‐Gyun , Choi Doo‐Hun , Moon Yon‐Tae , Baek Dong‐Hyun , Baek Kwang‐Hyun , Choi Young‐Wan 
Published: June 2010

AbstractWe have designed and realized a highly linear power amplifier module (PAM) for a WiMAX/WiBro base station using a simple linearization method. To improve the linearity of the PAM, we use large‐signal intermodulation distortion (IMD) sweet spots, which are part of the inherent properties of power transistors. These IMD sweet spots are determined by the device technologies and the bias voltage. Our PAM consists of a drive stage and a power stage. Two amplifiers are used in the drive stage, a GaAs field effect transistor (GaAs FET) and a laterally diffused metal oxide semiconductor. The linearity of the PMA can be maximally improved by the large‐signal IMD sweet spots, which are tuned by the bias voltage of the GaAs FET at the signal power input of the drive stage. Using this method, the measured adjacent channel leakage ratio and power consumption efficiency of the PAM are improved by 2.9 dBc and 5.2%, respectively. The measured error vector magnitude of the PAM is only 1.45. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1952–1955, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25374
Molecular network based on ant colony system via wavelength routers
Authors: Taengtang T. , Praitoonwattanakit K. , Yupapin P.P. 
Published: June 2010

AbstractWe propose a new method of molecular transporters generations based on ant colony algorithm for molecular classification and storage applications.The transportation network of molecules via multitweezers inside the close system can be manipulated in the same way of ant colony algorithm relationship. In the proposed method, we assign that each of ants represents an individual tweezer. By using ant colony system, the random codes can be used to communicate between ants inside swarm with pheromone being formed the random network. The quantum state of transporter (individual ant) with different states and wavelengths is represented by the pheromone. In application, this proposal can be an alternative random networking which may be used for communication security, where the fast multiple access may be plausible. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2139–2142, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25375
Develop CPW‐FED monopole broadband implantable antennas on the high dielectric constant ceramic substrates
Authors: Chien Tsung‐Fu , Yang Hung‐Chi , Cheng Chien‐Min , Luo Ching‐Hsing 
Published: June 2010

AbstractA compact broadband planar monopole antenna fed by coplanar waveguide is developed and screen‐printed on the high dielectric constant microwave dielectric ceramic substrate for the applications of implanted biotelemetry. Biocompatible ceramic materials are selected for substrate (MgTa1.5Nb0.5O6, εr = 28) and superstrate (Al2O3, εr = 9.8). Additionally, for protecting from the tissue erosion, the metal parts (the body of the implanted antenna) are screen printed on a MgTa1.5Nb0.5O6 ceramic substrate and covered by a Al2O3 ceramic superstrate. Because the inductive loading effect generated by the rectangular type meander and the use of high dielectric constant ceramics, both size miniaturization and bandwidth enhancement can be achieved. The measured S11 of the proposed antenna in lossy emulated tissue is −43 dB, and the bandwidth of this proposed antenna can be improved to 100 MHz (351–461 MHz), which it is wide enough for the applications of modern MICS band (402–405 MHz) and ISM band (433–435 MHz). © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2136–2139, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25376
An 18.85 mW 20–29 GHz wideband CMOS low‐noise amplifier with 3.85 ± 0.25 dB noise figure and 18.1 ± 1.9 dB gain
Authors: Chiu Yi‐Ting , Lin Yo‐Sheng , Chang Jin‐Fa 
Published: June 2010

AbstractA 20–29 GHz wideband CMOS low‐noise amplifier (LNA) with flat and low noise figure (NF), flat and high‐gain (S21), and excellent phase linearity property (group‐delay‐variation is only ±22.6 ps across the whole band) is demonstrated.To achieve flat and low NF, the size, layout, and bias of the input transistor were first optimized for minimum NF, and then the inductance of the input inductors was tuned to obtain a slightly under‐damped (flat) NF frequency response. In addition, to achieve flat and high S21 and small group‐delay‐variation, the inductive‐peaking technique was adopted in the current‐reused stage for bandwidth enhancement. The LNA consumed 18.85 mW power and achieved flat and low NF of 3.85 ± 0.25 dB, and flat and high S21 of 18.1 ± 1.9 dB over the 20–29 GHz band of interest. These are the best NF and S21 performances ever reported for a 21.65–26.65 GHz or a 22–29 GHz wideband CMOS LNA. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2017–2020, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25380
A compact UWB bandpass filter with WLAN rejection using a slot ring resonator
Authors: Shen Ming , Tong Tian , Jensen Ole K. , Mikkelsen Jan H. , Larsen Torben 
Published: June 2010

AbstractThis article presents a novel ultra‐wideband bandpass filter with controllable notched bands, compact size, and relaxed fabrication requirements.Its implementation is based on a rectangular slot ring resonator with an embedded S‐shaped slotline. The behavior of the rectangular slot ring resonator is characterized and subsequently adopted to build the wide passband. The notched band necessary for rejecting wireless local‐area network (WLAN) signals is implemented by the S‐shaped slotline. A prototype filter is implemented based on the proposed structure and good agreement is found between simulations and measurements. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1980–1984, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25381
Small‐size coupled‐fed printed PIFA for internal eight‐band LTE/GSM/UMTS mobile phone antenna
Authors: Wong Kin‐Lu , Tu Ming‐Fang , Wu Tzuenn‐Yih , Li Wei‐Yu 
Published: June 2010

AbstractA coupled‐fed printed PIFA (planar inverted‐F antenna) with a small footprint (about 415 mm2) for eight‐band operation covering the LTE700/2300/2500, GSM850/900/1800/1900, and UMTS bands in the mobile phone is presented.The proposed PIFA uses only a single radiating strip of length 45 mm which is short‐circuited to the system ground plane of the mobile phone through a long inductive shorting strip and is capacitively excited by a long coupling strip. The capacitive excitation leads to the generation of the λ/8 resonant mode at about 850 MHz and the higher order resonant modes at about 1900 MHz for the printed PIFA. The inductive shorting strip contributes additional inductance to achieve enhanced impedance matching for the excited 850 MHz band to achieve a dual‐resonant behavior, which results in a wide lower band to cover the LTE700/GSM850/900 operation. A higher order resonant mode at about 2650 MHz is also contributed by the long inductive shorting strip. This resonant mode incorporating the one at about 1900 MHz generated by using the coupling feed forms a wide upper band to cover the GSM1800/1900/UMTS/LTE2300/2500 operation. Compact integration of the proposed antenna with a nearby loudspeaker is also promising. Details of the results are presented. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2123–2128, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25387
Tunable fiber fabry‐perot filter for PM‐IM conversion and efficiency improvement in radio‐over‐fiber links
Authors: Ji Yubin , Zheng Shilie , Li Ze , Jin Xiaofeng , Zhang Xianmin , Chi Hao 
Published: June 2010

AbstractA novel method is proposed and demonstrated to simultaneously realize phase‐to‐intensity modulation conversion (PM‐IM) and efficiency improvement using a fiber Fabry‐Perot (FFP) tunable filter. To achieve the conversion of phase modulation to intensity modulation, the phase‐modulated light is transmitted from one of the slopes of the FFP tunable filter to break the amplitude balance of the sidebands. Meanwhile, the modulation depth is increased due to the more suppression of the optical carrier than one of the first‐order sidebands. The results demonstrate that the PM‐IM conversion has been achieved and an about 10‐dB gain of electrical signal power could be obtained with suitable optical carrier suppression for both 10‐and 20‐GHz microwave input. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2090–2095, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25389
Performance evaluation of a low‐cost switched‐beam antenna for WLAN users
Authors: Uthansakul Monthippa , Chaipanya Pichaya , Uthansakul Peerapong 
Published: June 2010

AbstractThis article proposes a low‐cost switched‐beam antenna using single antenna element for WLANs.This octagonal‐shape antenna allows eight beam‐patterns, which can be controlled by shorted‐circuit terminations at different edges. The prototype of proposed antenna is constructed and tested to demonstrate its beam steering capability, compared with simulation results. Also the prototype is tested under real circumstance in existing WLAN infrastructure. The measured results reveal that signal strength can be improved using the proposed antenna over omnidirectional antenna utilized in these days. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2069–2074, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25394
Simultaneous measurement of force and temperature based on a half corroded FBG
Authors: Zhou Wenjun , Zhao Chun‐Liu , Dong Xinyong , Zhang Shuqin , Chan Chi Chiu , Shum Ping 
Published: June 2010

AbstractA simple single fiber Bragg grating (FBG)‐based force sensing head is proposed, in which half of the FBG is thinned through chemical corrosion with hydrofluoric acid so that different force sensitivities are achieved from the two grating halves, while their temperature sensitivities remain the same. The initial single Bragg reflection peak of the FBG splits into two, whose wavelengths are sensitive to both force and temperature, but the separation of their wavelengths is determined only by the applied force. As a result, simultaneous measurement of force and temperature are realized by measuring wavelengths of the two peaks. In the experiment, sensitivities of 0.784 nm/N and 9.7 pm/°C are achieved for force and temperature, respectively. And the corresponding resolutions are 0.013 N and 1.03°C, limited by the wavelength measurement resolution, 0.01 nm, of the employed optical spectrum analyzer. PACS: 42.81.Pa, 42.81.‐i. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2020–2023, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25397
Adding microstrip line at the bottom of PCB for enhancing antenna bandwidth
Authors: Cho B.‐G. , Lee K.‐M. , Kim Y.‐S. 
Published: June 2010

AbstractIn this article, added microstrip line at the bottom area of printed circuit board (PCB) is proposed for improving the bandwidth of GSM900, DCS1800, and PCS1900. By printing the microstrip line at the bottom area of PCB, frequency bandwidth of slim‐type cellular phone which has a low‐profile monopole antenna is improved. Dimension of the microstrip line is 45 mm × 9 mm. The width and length of the microstrip line is modified for good bandwidth. The measured return loss of the antenna is better than 7.3 dB for low and high band. Measured peak gains of the proposed antenna present 3.41, 5.48, and 5.95 dBi in each band, respectively. Details of the antenna design are described. Its performances are also presented. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1984–1988, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25399
Radio‐on‐fiber transport system using double modulation for down‐conversion technique
Authors: Tsai W. S. , Lin Z. S. , Hsu C. H. 
Published: June 2010

AbstractWe propose a frequency down‐conversion system in this letter. The system produces signals with 200 MHz, 2.4 GHz, 4.8 GHz, and 5 GHz frequencies by loading 2.4 and 5 GHz signals. By the reactions of the double sideband modulation using two Mach‐Zehnder modulators. Filter out the specific signal with optical bandpass filter to achieve the effect for down‐conversion. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1949–1952, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25400
A new artificial intelligent technique for designing of microstrip stepped impedance low‐pass filter
Authors: Taher Hany 
Published: June 2010

AbstractIn this letter, we have presented a new design methodology for microstrip stepped impedance filter.An artificial neural network has been used to learn the nonlinear relationship between the design specifications and physical dimensions of the required filter. The performance of filter designed with this technique has been successfully validated. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1946–1949, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25401
Effects of parasitic resonance on a vertical transition in multilayer printed circuit boards
Authors: Choi Sung Tae , Hamaguchi Kiyoshi , Tokuda Kiyohito , Kim Yong Hoon 
Published: June 2010

AbstractThis article reports on parasitic resonance effects of a ground plane with/without a ground opening underneath a signal via with an open stub on the performance of a vertical transition in a multilayer printed circuit board. An equivalent circuit model that accounts for the parasitic resonance due to the open stub inductance and the parasitic capacitance is developed and verified with the measured and simulated results. The fabricated transition exhibits a return loss better than about 10 dB and an insertion loss less than 1.9 dB up to 21.5 GHz. A good agreement is observed between measured and simulated results. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2098–2100, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25404
Dual‐band hybrid coupler with extended bandwidth
Authors: Cheung King Yin , Zheng Shao Yong , Chan Wing Shing , Man Kim Fung 
Published: June 2010

AbstractA dual‐band branch‐line quadrature coupler with extended bandwidth using simple three‐section branch line is presented.This proposed design exhibits larger bandwidth than existing dual‐band designs reported in previous literature. A dual‐band branch‐line coupler was designed and measured to give 34.5 and 16.4% bandwidth in the lower band and upper band, respectively, for an amplitude imbalance less than 1 dB. The achieved bandwidth is wide enough to cover wireless local area network and wideband code division multiple access applications. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2095–2098, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25405