bluuebunny/crossref_metadata_2025_split huggingface dataset:
PMD measurements based on low‐coherence interferometry using a Michelson interferometer
Authors: Amaral Luís M. N. , Pereira D. A. , Frazão O. , Marques M. B. , Lima M. J. N. , Teixeira A. L. J. 
Published: July 2010

AbstractA low‐coherence technique in a Michelson interferometer for measuring polarization mode dispersion (PMD) was tested. The measured PMD mean value for one reel, in a period of several days, was 0.0405 ± 0.0008 ps/km1/2 and for the other reel, it was 0.0463 ± 0.0004 ps/km1/2. Stochastic and random PMD behavior was observed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2310–2312, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25428
Low‐profile, electrically small meander antenna using a capacitive feed structure
Authors: Ide Kazuki , Fukusako Takeshi 
Published: July 2010

AbstractThis article describes a capacitive feed (C‐feed) for small, low‐profile linear antennas. A meander line, which is the radiating element, in such antennas with a metallic back conductor electromagnetically couples a metallic feed plate placed between the meander line and the back metal (ground). This antenna has a very small leakage current on the outer surface of the coaxial cable and can control the imaginary part of the input impedance. The impedance characteristics and the antenna gain of −10 dBi are discussed based on simulated and measured results, which demonstrate successful achievement in the impedance and antenna gain for a RFID tags etc. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2269–2274, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25444
A bend loss–based singlemode fiber microdisplacement sensor
Authors: Wang Pengfei , Semenova Yuliya , Wu Qiang , Farrell Gerald 
Published: July 2010

AbstractAn all‐fiber displacement sensor with a simple configuration is proposed and investigated theoretically and experimentally. The proposed fiber displacement sensor consists of a half‐loop structure of high‐bend loss singlemode fiber‐1060XP. A ratiometric power measurement system for interrogating the proposed sensor is also presented. By measuring the change in ratio of bend loss in the ratiometric measurement system, a change in displacement can be measured assuming the ratiometric system is calibrated. The proposed macrobending fiber–based displacement sensor achieves a competitive resolution of circa 0.3 μm and also benefits from simplicity compared with conventional fiber Bragg grating–based displacement sensor. The displacement sensor is sensitive to temperature and an experimental investigation of this sensitivity is presented. It is found that the ratio response has a linear variation with temperature; therefore, temperature dependence can be mitigated by a suitable correction process. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2231–2235, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25446
Improved peak power method for measuring frequency responses of photodetectors in a self‐heterodyne system
Authors: Xian Wang Li , Hua Zhu Ning , Hong Ke Jian , Li Wei , Fu Chen Shuo , Xie Liang 
Published: July 2010

AbstractAn improved peak power method for measuring frequency responses of photodetectors in a self‐heterodyne system consisting of a distributed Bragg reflector laser is proposed.The time‐resolved spectrum technique is used to measure the peak power of the beat signal and the intrinsic linewidth of beat signal for calibration. The experimental results show that the impact of the thermal‐induced frequency drift, which is the main reason for producing an error in measurement by conventional peak power method and spectrum power method, can be removed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2199–2203, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25448
A meandering dual‐mode bandpass filter with rectangular‐loop perturbation
Authors: Chu Rui , Mao Jun‐Fa , Zhou Liang 
Published: July 2010

AbstractA dual‐mode bandpass filter is proposed that is composed of a meandering resonator and a small rectangular loop for the purpose of perturbation.Both the length and width of the rectangular loop could control the dual‐mode resonant frequencies. A prototype filter is designed and fabricated with a center frequency of 2.45 GHz. The measured fractional bandwidth is 10.98%, insertion loss is 0.8 dB, and return loss is over 15 dB, which are in good agreement with the simulated results. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2356–2359, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25454
Harmonic‐rejected compact bandpass filter using dual‐mode microstrip resonator with additional open stub
Authors: Yun Tae‐Soon , Nam Hee , Lee Byungje , Choi Jin‐Joo , Kim Jin‐Young , Lee Jong‐Chul 
Published: July 2010

AbstractIn this article, a compact dual‐mode λg/2 bandpass filter with the characteristic of harmonic rejection is designed and implemented.The second and third harmonics of the suggested bandpass filter are rejected by using the additional open stubs of the T‐type equivalent circuit for the quarter wavelength line. Also, the J‐inverter is investigated as functions of the impedance and electrical length of the open stub of dual‐mode λg/2 resonator. From the results, the lower impedance of open stub of dual‐mode λg/2 resonator is better for the good performance of the dual‐mode λg/2 bandpass filter. The harmonic‐rejected dual‐mode λg/2 bandpass filter shows the characteristic of suppression of harmonics until 8 GHz and the insertion and return losses of 0.96 and 18.89 dB, respectively, at the center frequency of 2.43 GHz. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2288–2291, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25457
Design of a new meander Archimedean spiral antenna
Authors: Wang Ya‐Wei , Wang Guang‐Ming , Zeng Hui‐Yong 
Published: July 2010

AbstractThis article introduces a compact sine wave meander Archimedean spiral antenna designed by adding sinusoidal function to Archimedean function.Results simulated and measured show that the proposed antenna possesses fine wideband properties. The measured return loss is less than −10 dB in the frequency range of 1.625–10 GHz and the axial ratio is less than 3 dB within the design frequency range (1.63–10 GHz). Compared to a typical Archimedean spiral antenna in the same operating band, the antenna presented in this article has a 63.6% reduction in area. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2384–2387, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25464
Colpitts VCO with gate‐series high‐quality factor LC resonator
Authors: Jang Sheng‐Lyang , Chou Li‐Te , Chang Chia‐Wei 
Published: July 2010

AbstractA new differential voltage‐controlled oscillator (VCO) is designed and implemented in a 0.13‐μm CMOS 1P8M process. The designed circuit topology is ann‐core LC‐tank VCO with an LC resonator. At the supply voltage of 1.1 V, the output phase noise of the VCO is −113.8 dBc/Hz at 1‐MHz offset frequency from the carrier frequency of 11.73 GHz and the figure of merit is −192.01 dBc/Hz. The core power consumption is 1.83 mW. Tuning range is 1.47 GHz from 10.66 to 12.13 GHz, while the control voltage was tuned from 0 to 1.2 V. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2170–2173, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25466
Generalized negative‐refractive index transmission line based on defected ground structure
Authors: Ryu Young‐Ho , Park Jae‐hyun , Lee Jeong‐Hae , Tae Heung‐Sik 
Published: July 2010

AbstractThe planar generalized negative‐refractive index transmission line (G‐NRI TL) is proposed using only distributed structures, such as defected ground structure, stub with rectangular patch, wire‐bonded interdigital capacitor, and short stub.The characteristics, such as dispersion relation and frequency response of the G‐NRI TL are analyzed by circuit analysis, full wave simulation, and measurement. The results show a good agreement. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2223–2225, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25467
Performance evaluation of three basic antennas in chip packages for 60‐GHz radios
Authors: Sun M. , Zhang Y. P. , Chua K. M. , Wai L. L. , Liu D. 
Published: July 2010

AbstractThis article presents the performance evaluation of three basic antennas in chip packages in low‐temperature cofired ceramic (LTCC) technology for 60‐GHz radios. The three basic antennas are dipole, patch, and slot. They are integrated in three chip packages of the same design and size 12.5 × 8 × 1.265 mm3and are tested with a probe‐based measurement system in an anechoic chamber, respectively. Measured impedance and radiation results are compared and discussed, showing that they all achieve acceptable antenna performance in the 60‐GHz band from 57 to 64 GHz. Hence, it can be concluded that the integration of a basic antenna in a chip package in LTCC technology is feasible for short‐range high‐speed 60‐GHz wireless communications. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2359–2363, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25471
Optimal shunt inductance sizing for high pulse fidelity wideband amplifiers
Authors: Amoroso Francesco Antonio , Pugliese Andrea , Cappuccino Gregorio 
Published: July 2010

AbstractA new design approach for wideband amplifiers with inductive shunt peaking is presented.An accurate circuit model and a well‐defined rule to size the shunt inductance are introduced to control the oscillations in the amplifier step response by fixing the desired damping factor of the amplifier poles. The proposed strategy guarantees systematic settling time minimization for a given power dissipation and is very suitable to design efficient amplifiers for wideband applications demanding high pulse fidelity. Design examples in a commercial 0.13‐μm CMOS technology are also presented. Simulation results show the effectiveness of the method. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2324–2327, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25473
A compact butler matrix for WLAN application
Authors: Maddah‐Ali Mohsen , Forooraghi Keyvan 
Published: July 2010

AbstractIn this article, a compact butler matrix for wireless communications is designed and implemented at 2.4 GHz using defected ground structures (DGS).The butler matrix consists of a 3‐dB coupler, crossover (0‐dB coupler), and phase shifter. The 3‐dB coupler and crossover are compacted using T‐model of transmission line and DGS. The size of proposed butler matrix is about 35% of a conventional matrix. To verify simulation results, designed matrix has been implanted and measured. Fortunately, there is very good agreement between simulation results and measured results. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2294–2298, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25474
Horizontal five‐arm folded dipole over metal screening plane for UHF RFID of dielectric objects
Authors: Švanda Milan , Polívka Milan 
Published: July 2010

AbstractThe article is concerned with the extremely low‐profile foam dielectric five‐arm folded dipole antenna, which was developed and manufactured. The aforementioned antenna is situated on the metal screening plane and is used for UHF RFID of dielectric objects. It is designed with a complex input impedance Zin = 22 + j195 Ω at 866 MHz. Its efficiency was evaluated by Wheeler cap method with and without enclosed a human body phantom, it accounts for ∼40%, irrespective of whether the phantom is enclosed or not. The preliminary test of the identification range in buildings corridor was performed. The identification range reaches as far as 15.8 m. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2291–2294, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25475
Design of an ultra‐wideband MIMO antenna for PDA applications
Authors: Lee Jaewon , Hong Seokjin , Choi Jaehoon 
Published: July 2010

AbstractA low‐profile, ultra‐wideband (UWB), multi‐input multi‐output (MIMO) antenna for a personal digital assistant application is proposed.To improve the impedance bandwidth, a 2 mm × 1 mm connecting strip is used on each antenna element. The isolation characteristic between the two antenna elements is improved by inserting two T‐shaped stubs. The optimized design parameters were obtained through parametric analysis. The designed antenna has a 10‐dB return loss bandwidth of 9 GHz (2.2–11.2 GHz) covering the WiBro, Bluetooth, WiMax, S‐DMB, and UWB frequency bands, with an isolation characteristic below −20 dB over the operating frequency. Additionally, the envelope correlation coefficient is less than 0.12. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2165–2170, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25478
Low cost 60‐GHz microstrip bandpass filter with stub‐loaded anticoupled line
Authors: Wong Sai Wai , Chen Zhi Ning , Qing Xianming 
Published: July 2010

AbstractA 60‐GHz microstrip bandpass filter with stub‐loaded anticoupled line is presented in this article. First, a dual‐mode bandpass filter is discussed, which has two transmission zeros at the lower and upper cut‐off frequencies for a sharp rejection skirt. The lower transmission zero near cut‐off frequency is created by the anticoupled line section, whereas the stub‐loaded section provides another transmission zero at the upper cut‐off frequency. Meanwhile, the coupling effect of the stub‐loaded section is eliminated to improve the suppression in the upper‐stopband. Then, a half‐wave strip resonator is inserted into the anticoupled lines to achieve a 3‐pole bandpass filter with sharper rejection and wider bandwidth. Finally, a prototype is designed and fabricated on a single‐layered Roger4003C substrate to experimentally validate the in‐band and out‐of‐band performances of the proposed filter over an unlicensed 60‐GHz ISM band of 57–64 GHz. The measurement shows that the suppressions in lower and upper bands are, respectively, 20 dB and 25 dB, and the insertion loss is 1.1 dB at 60 GHz. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2375–2378, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25479
Design of dual‐mode bandpass filter using SRR structure
Authors: Zhou Ming , Tong Chuang‐ming , Fu Shu‐hong , Wu Li‐nan 
Published: July 2010

AbstractThis article presented a novel bandpass microwave filter, which is synthesized split‐ring resonators (SRR) with dual‐mode filters techniques. The structure of this filter is simple and compact size, low insertion loss, and higher capability of power handling. With the structure of SRR and the method of straightway connect triangular resonator, It has remarkable advantages, such as lower ripple level, wider passband and higher selectivity. The effects of varying the parameters of the filter have been studied. The structure was fabricated and measured experimental results agree with the simulation results very well. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2372–2375, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25480
Experimental phase plate employing a phase modulated active frequency selective surface
Authors: Taylor P. S. , Parker E.A. , Batchelor J. C. 
Published: July 2010

AbstractA novel method employing a phase modulated frequency selective surface (FSS) to improve the wireless communications coverage of enclosed spaces in the built environment through the filling of black spots is described. The design and fabrication of a phase modulated FSS are discussed, together with some initial measurements and results. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2300–2302, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25484
Compact dual‐band bandpass filter using slot‐line resonator
Authors: Bao Zhi‐Hua , Chen Jian‐Xin , Tang Hui , Zhou Li‐Heng 
Published: July 2010

AbstractThis letter presents a novel compact dual‐band bandpass filter (BPF), which consists of two pairs of half‐guided wavelength slot‐line resonators. The two pairs of resonators, operating at different frequencies, generate two passbands for the proposed BPF by utilizing a novel coupling scheme. Tight coupling between the two resonators in each of the pairs can be simultaneously achieved, and the interaction between the two pairs is negligible. Thus the operation frequencies of the two passbands can be controlled independently. Several attenuation poles are created to enhance the selectivity of the proposed filter. The simulated and measured results are presented, showing good agreement. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2299–2300, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25485
Terahertz wave modulator based on optically controlled photonic crystal slab
Authors: Li Jiu‐sheng , Tao Gui‐sheng 
Published: July 2010

AbstractWe studied the design and characterization of an optically controlled terahertz (THz) wave modulator based on silicon photonic crystal slab, which is made from a high‐resistivity Si with triangular lattice and a line defect formed by removing a single row of air holes along Γ‐K direction. A modulated semiconductor laser with 808‐nm wavelength is used to illuminate the line defect of the photonic crystal. The interaction between the bandgap shift and THz wave is strengthened and yields an appreciable modulation of the THz output beam for optical pump. Experimental results show that the presented THz wave modulator has modulation speed of 0.8 Kb/s by modulated semiconductor laser excitation 150‐mw average power at 808 nm. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2226–2227, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25489
Measurement non‐invariance of DSM‐IV narcissistic personality disorder criteria across age and sex in a population‐based sample of Norwegian twins
Authors: Kubarych Thomas S. , Aggen Steven H. , Kendler Kenneth S. , Torgersen Sven , Reichborn‐Kjennerud Ted , Neale Michael C. 
Published: July 2010

AbstractWe investigated measurement non‐invariance of DSM‐IV narcissistic personality disorder (NPD) criteria across age and sex in a population‐based cohort sample of 2794 Norwegian twins. Age had a statistically significant effect on the factor mean for NPD. Sex had a statistically significant effect on the factor mean and variance. Controlling for these factor level effects, item‐level analysis indicated that the criteria were functioning differently across age and sex. After correcting for measurement differences at the item level, the latent factor mean effect for age was no longer statistically significant. The mean difference for sex remained statistically significant after correcting for item threshold effects. The results indicate that DSM‐IV NPD criteria perform differently in males and females and across age. Differences in diagnostic rates across groups may not be valid without correcting for measurement non‐invariance.
In‐Line Monitoring of Vinyl Chloride Suspension Polymerization with Near Infrared Spectroscopy, 2 ‐ Design of an Advanced Control Strategy
Authors: de Faria João Miguel , Machado Fabricio , Lima Enrique Luis , Pinto José Carlos 
Published: July 2010

AbstractNear infrared spectroscopy (NIRS) may constitute a powerful tool for in‐line monitoring of morphological properties of PVC particles in suspension polymerizations. It is shown that dynamic trajectories of morphological properties, as predicted with NIR‐based calibration models, change smoothly along the batch; thus, these trajectories can be used as references for process monitoring and control. It is also shown that modification of operation variables during the batch leads to modification of the final morphological properties of the powder. This indicates that the morphology of PVC grains can be manipulated along the batch and that advanced NIR‐based control procedures can be implemented for control of the morphological properties of PVC resins, as illustrated through simulation.magnified image
Minimum envelope roughness pulse design for reduced amplifier distortion in parallel excitation
Authors: Grissom William A. , Kerr Adam B. , Stang Pascal , Scott Greig C. , Pauly John M. 
Published: July 2010

AbstractParallel excitation uses multiple transmit channels and coils, each driven by independent waveforms, to afford the pulse designer an additional spatial encoding mechanism that complements gradient encoding. In contrast to parallel reception, parallel excitation requires individual power amplifiers for each transmit channel, which can be cost prohibitive. Several groups have explored the use of low‐cost power amplifiers for parallel excitation; however, such amplifiers commonly exhibit nonlinear memory effects that distort radio frequency pulses. This is especially true for pulses with rapidly varying envelopes, which are common in parallel excitation. To overcome this problem, we introduce a technique for parallel excitation pulse design that yields pulses with smoother envelopes. We demonstrate experimentally that pulses designed with the new technique suffer less amplifier distortion than unregularized pulses and pulses designed with conventional regularization. Magn Reson Med, 2010. © 2010 Wiley‐Liss, Inc.
Rapid T1 mapping of mouse myocardium with saturation recovery look‐locker method
Authors: Li Wen , Griswold Mark , Yu Xin 
Published: July 2010

AbstractDynamic contrast‐enhanced MRI using gadolinium or manganese provides unique characterization of myocardium and its pathology. In this study, an electrocardiography (ECG) triggered saturation recovery Look‐Locker method was developed and validated for fast cardiac T1 mapping in small animal models. By sampling the initial portion of the longitudinal magnetization recovery curve, high temporal resolution (∼3 min) can be achieved at a high spatial resolution (195 × 390 μm2) in mouse heart without the aid of parallel imaging or echo‐planar imaging. Validation studies were performed both in vitro on a phantom and in vivo on C57BL/6 mice (n = 6). Our results showed a strong agreement between T1 measured by saturation recovery Look‐Locker and by the standard saturation recovery method in vitro or inversion recovery Look‐Locker in vivo. The utility of saturation recovery Look‐Locker in dynamic contrast‐enhanced MRI studies was demonstrated in manganese‐enhanced MRI experiments in mice. Our results suggest that saturation recovery Look‐Locker can provide rapid and accurate cardiac T1 mapping for studies using small animal models. Magn Reson Med, 2010. © 2010 Wiley‐Liss, Inc.