bluuebunny/crossref_metadata_2025_split huggingface dataset:
New materials for electromagnetic shielding: Metal foams with plasma properties
Authors: Monti Giuseppina , Catarinucci Luca , Tarricone Luciano 
Published: May 2010

AbstractIn this article, the use of metal foams for shielding problems is investigated on the bases of an “effective medium approach.” Specifically, a shielding effectiveness analysis has been performed by modeling metal foams as a homogeneous medium described by a plasma dispersion profile.The suggested approach is experimentally validated demonstrating that metal foams behave like a plasma medium, with a plasma frequency in the microwave range. The proposed effective medium approach has also been implemented both with a proprietary and with a commercial full‐wave simulator. Results demonstrate that, by using the plasma model, general electromagnetic analysis of metal foams can be performed with common simulators and with affordable computational efforts. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1700–1705, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25309
A beam‐switchable coupled feeding network in X‐band
Authors: Im Yun‐Taek , Lee Jee‐Hoon , Jeong Yong‐Woo , Lee Sang‐Ik , Park Seong‐Ook 
Published: May 2010

AbstractAn antenna feeding network is proposed for a driving system.It consists of branch line couplers, Wilkinson power dividers, and asymmetric delay lines. Using an orthogonal beam property and an antenna sharing technique, its radiation patterns are measured at 10 GHz. The measured beam coverage angle was 70° (−35° to +35°) in the five input ports by using eight radiating elements. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1865–1868, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25313
Small microstrip‐fed printed monopole antenna for UWB application
Authors: Ojaroudi M. , Ebrahimian H. , Ghobadi Ch. , Nourinia J. 
Published: May 2010

AbstractIn this article by using the Babinet's Equivalence Principle and self‐complementary structure, we present a novel printed monopole antenna for ultra‐wideband (UWB) applications. The proposed antenna consists of a ground plane and radiating patch with a slot and a sleeve structure, which provides fractional bandwidth of more than 100%. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1756–1761, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25318
Fast inhomogeneous plane wave algorithm for scattering from PEC body of revolution
Authors: Rui Xi , Hu Jun , Liu Qing Huo 
Published: May 2010

AbstractTo solve large‐scale electromagnetic scattering problems for bodies of revolution, a fast inhomogeneous plane wave algorithm (FIPWA) is developed. By using the Weyl identity and designing a proper integral path, the aggregation and disaggregation factors can be computed efficiently in FIPWA. Both the memory and CPU time requirements are significantly reduced for large scale BOR problems over the method of moments. Numerical results are given to demonstrate the validity and the efficiency of the FIPWA method to perfect conductors, but the method can be extended to dielectric BORs. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1915–1922, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25319
Investigations on a multiband microstrip‐fed inverted‐F antenna with ground slots
Authors: Razali Ahmad R. , Bialkowski Marek E. , Boldaji Ashkan , Tsai Feng‐Chi E. 
Published: May 2010

AbstractThis article describes two designs of a Coplanar Inverted F Antenna (CIFA) which employ a microstripline as a feeding element and open‐end ground slots to obtain a multiband operation in the frequency band of 2.4 and 6 GHz.Investigations are performed with regard to two different orientations of ground slots one being parallel and the other perpendicular to CIFA. Initially, the CIFA element is designed to operate at 2.45 GHz in the absence of ground slots. Next, open‐end ground slots suitably coupled to the feeding microstripline are added to obtain operation at higher frequencies. The two configurations of multiband CIFA are fabricated and experimentally assessed in terms of return loss, radiation pattern, and gain. The radiation mechanism is studied through the simulated distributions of surface current densities. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1713–1719, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25321
Flexible V‐band optical millimeter‐wave carrier generation techniques using optical injection locked Fabry‐Pérot laser diodes
Authors: Hong Moon‐Ki , Won Yong‐Yuk , Han Sang‐Kook 
Published: May 2010

AbstractNovel schemes, for V‐band (60‐GHz frequency range) optical millimeter‐wave (mm‐wave) carrier generation in radio‐over‐fiber system, are proposed and experimentally demonstrated that are based on injection‐locked Fabry‐Pérot laser diodes.Dual‐parallel and cascaded structures are individually proposed to generate the mm‐wave carrier. We could improve the suppression ratio (SR) of the carrier suppressed optical signal as well as reduce RF phase noise of the mm‐wave carrier by using the proposed schemes. The SR improvement of the carrier suppressed optical signal of 20 dB was verified. 60‐GHz mm‐wave carrier of enhanced signal quality could be also achieved. Its peak power and RF phase noise were obtained as about −40 dBm and less than −95 dBm, respectively, which was suitable for 60‐GHz data transmission. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1685–1691, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25322
Three to two curve fractal folded dipole antenna for RFID application
Authors: Zhou Jianhua , Luo Yong , You Baiqiang , Lin Bin 
Published: May 2010

AbstractA 3/2 curve fractal dipole antenna was proposed for radio‐frequency identification application, with mirror and photonic bandgap structure. Some properties of the antenna, such as return loss and bandwidth have been simulated and investigated. The results show that the absolute bandwidths of antenna are up to 0.28 GHz and 0.41 GHz at 2.4 GHz and 5.8 GHz, respectively accordingly the relative bandwidths up to 9.76% and 6.87%. With a prototype fabricated, we also verified the good performance of the antenna through the comparison of measured and simulated results. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1827–1830, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25324
Four‐channel fiber loop ring‐down pressure sensor with temperature compensation based on neural networks
Authors: Gao Yang , Qiu Yishen , Chen Huaixi , Huang Yan , Li Gaoming 
Published: May 2010

AbstractA four‐channel fiber loop ring‐down pressure sensor with temperature compensation based on neural networks is described.This fiber ring‐down pressure sensor makes use of the principle of time division multiplexing, which consists of series and parallel fiber loops. The laser pulses from four‐channels can be acquired by only one detector and the four pressure values are measured synchronously in our experiment. Taking mode dispersion in multimode fiber into consideration, the maximum multiplexing number is discussed. In addition, temperature compensation based on neural networks has been successfully used in our experiment, to eliminate the disturbance of environmental temperature. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1796–1799, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25326
A band‐notched CPW fed antenna with ring ground for ultra‐wideband applications
Authors: Guo Qingxin , Li Zengrui , Wang Junhong , Ju Jilong 
Published: May 2010

AbstractA new CPW‐fed antenna with band‐notched is proposed for ultra‐wideband antenna applications. It consists of a ring strip connecting with two triangle patches as the ground and a rectangular patch connecting with a strip as the radiator and feeding line. A narrow slot is embedded in the radiator to obtain notched‐band characteristics within bandwidth of 5–6 GHz. Simulated results gotten by FDTD method are given and compared with the experimental results. Measured results show that the antenna can cover a bandwidth from 2.5 to 10.7 GHz for VSWR < 2 except the notched‐band. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1691–1694, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25333
Design on a broadband circularly polarized slot antenna
Authors: Gao Xiang Jun , Zhu Li , Wang Guangming 
Published: May 2010

AbstractIn this article, a novel broadband circularly polarized (CP) slot antenna is proposed and fabricated, in which, a simple perturbation configuration with a narrow rectangular slot etched near the square slot is used for perfect CP operation. Through simulating and testing, the broad impedance bandwidth of 57.6% (VSWR < 2.0) and the 3‐dB axial ratio bandwidth of 50.2% are achieved. This slot antenna will be widely used in communication field. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1912–1915, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25337
Design and implementation of penta‐band PCB embedded antenna including LTE700 for mobile handset
Authors: Kwak Yong Soo , Park Sung Koo , Jo JaeHoon , Cho Bum Jin , Jeong Seong Tae , Byun Joon Ho , Kim Austin S. 
Published: May 2010

AbstractIn this article, multi‐band antenna covering LTE700/GSM850/GSM900/DCS1800/PCS1900 for mobile terminal is presented.The proposed capacitive feeding antenna is a IFA type antenna and implemented as a PCB embedded antenna (PEA). Broad bandwidth in low‐band is achieved using pattern overlapped capacitive feeding. Simulation is conducted to verify broad low‐band and multi‐band operation using HFSS and experimental results are also presented. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1909–1912, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25338
A voltage sensor based on a singlemode–multimode–singlemode fiber structure
Authors: Hatta Agus Muhamad , Semenova Yuliya , Rajan Ginu , Farrell Gerald 
Published: May 2010

AbstractA voltage sensor based on a singlemode–multimode–singlemode (SMS) fiber structure, attached to a piezoelectric (PZT), used in a ratiometric optical power measurement scheme is proposed. The elongation of the PZT due to an applied voltage induces a strain on the SMS fiber structure and in turn results in a change in the transmission loss response of the SMS fiber structure. It is found that at selected wavelengths, a strong voltage dependence for the transmission loss of the SMS fiber structure can be achieved. The voltage information can be obtained from the power ratio of the system, assuming the system is calibrated. The proposed voltage sensor offers a simpler configuration when compared to other fiber optic voltage sensors. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1887–1890, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25339
Very compact coupled fed loop antenna for 2.4‐GHz WLAN applications
Authors: Su Saou‐Wen , Hong Tzi‐Chieh , Chang Fa‐Shian 
Published: May 2010

AbstractA novel, coupled fed loop antenna with a small form factor for wireless local area network operation in the 2.4 GHz band is presented.The antenna has a very compact structure with the dimensions 29.75 mm × 5 mm and consists of a half‐wavelength loop and a coupling feed, all printed in a coplanar configuration on a 0.4‐mm thick FR4 substrate. The antenna was easily fed by using a 50‐Ω minicoaxial cable, allowing it to have much flexibility in the placement in a defined location. The results show that good input matching over the 2400–2484 MHz band can be achieved by tuning the coupling‐pad size and the loop width. Good omnidirectional radiation patterns were also observed. Details of a design prototype are described and discussed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1883–1887, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25340
Study of the effect of the slot dimension on the properties of a planar ultra‐wideband antenna
Authors: Barbarino Sebastiano , Consoli Fabrizio 
Published: May 2010

AbstractThe effect of the slot dimension on the features of a typical planar antenna for UWB communications is described here. Many prototypes, each having slot of different width, have been studied and realized, and the comparison between simulations and measurements is shown. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1813–1817, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25343
Composite right/left‐handed band‐pass filters with wide fractional bandwidth based on dual‐metal‐plane structure
Authors: Lin Shih‐Cheng 
Published: May 2010

AbstractComposite right/left‐handed band‐pass filters with wide fractional bandwidth are implemented based on the proposed dual‐metal‐plane configuration.With proper design of the symmetric composite right/left‐handed unit cell composed with arbitrarily adjustable lumped‐elements, the passband and the fractional bandwidth can be constructed. Specifically, the implemented filters possess relatively achievable wide bandwidth in comparison with the conventional filters. For demonstration, two dual‐plane filters at different center frequencies with distinct factional bandwidth are designed and fabricated. These two filters exhibit good frequency selectivity around the passband. In addition, the measured results show good agreement with the simulated ones. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1810–1813, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25344
Artificial magnetic surface for circular polarization improvement
Authors: Carrubba E. , Monorchio A. , Manara G. 
Published: May 2010

AbstractA novel approach to improve the circular polarization properties of a small elliptically polarized (EP) radiating element is presented. The enhancement in circular polarization is obtained by mounting the radiating element close to an artificial magnetic conductor (AMC). To explain the antenna operating principle, two different typologies of radiating element have been initially considered, i.e., a small spiral antenna and a dipole. Both antennas are EP, but the excited current distribution on the AMC screen are circular and linear, respectively. We inferred that only a circular current distribution determines the XPD improvement in correspondence of the AMC resonances. The prototype of the small spiral antenna in the vicinity (λ0/18) of the AMC screen has been manufactured and tested. Measurements confirmed a remarkable improvement in spiral cross polarization discrimination (XPD) in correspondence of the two AMC resonances. The dual‐band behavior of the AMC could be exploited in applications where multifrequency operation is required. The low profile structure is characterized by an overall thickness of 1.1 cm, which corresponds to ∼λ0/12 at the centre of the operating band. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1782–1786, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25345
An embedded multilayer LTCC band‐pass filter using U‐type stepped impedance resonator
Authors: Wang Zhigang , Wu Peng , Yan Bo , Guo Yunchuan , Xu Ruimin , Lin Weigan 
Published: May 2010

AbstractThis article proposes a compact multilayer band‐pass filter based on low‐temperature co‐fired ceramic (LTCC) technology.The filter is constructed using U‐type stepped impedance resonators (SIR) with microstrip input and output ports. To validate the proposed filter, a three‐order X‐band Chebyshev band‐pass filter is developed and verified by full‐wave simulation. The proposed filter is fabricated using multilayer LTCC technology and measured using vector network analyzer (VNA). Covering area of the fabricated band‐pass filter is only 15.3 × 6.7 mm2 (including via fences). The filter exhibits an insertion loss of lower than 1.8 dB with a 3.2% bandwidth at a center frequency of 9.5 GHz, and the return loss is better than 10 dB in the pass‐band. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1877–1880, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25352
Wideband CPW‐fed elliptical monopole antenna
Authors: Sun Xu‐Bao , Cao Mao‐Yong 
Published: May 2010

AbstractAn elliptical monopole antenna with a wide bandwidth is proposed, which is composed of an elliptical monopole patch and a ground plane by uniting a quarter of a disc and a rectangular structure, both printed on the same side of a substrate and fed by a coplanar waveguide (CPW) feeder.The simulated and experimental results demonstrate that this antenna achieves an impedance bandwidth covering 2.6–13.9 GHz for VSWR ≤ 2 and also shows a nearly omnidirectional radiation pattern, which indicates that the proposed antenna performance is suitable for UWB applications. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1774–1776, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25358
Broadband microwave gas sensor: A coaxial design
Authors: Rossignol J. , Stuerga D. , Jouhannaud J. 
Published: May 2010

AbstractThe method of gas detection by a broadband microwave gas sensor is presented in this article. The principle of this method is to use a sensitive material as substrate of a transmission coaxial line. The sensor represents an open line with an extreme surface in contact with gas. The interaction with the gas and the surface induces a dielectric variation of the substrate. From experimental results, the interaction between the sensitive material and each tested gas present a specific frequency spectrum of the reflection coefficient at the input of the line. The proposed method has the advantage of a compact size, wide bandwidth, simple structure, and capable with all sensitive materials. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1739–1741, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25359
Charcot–marie–tooth disease with intermediate conduction velocities caused by a novel mutation in the MPZ gene
Authors: Banchs Isabel , Casasnovas Carlos , Montero Jordi , Volpini Victor , Martínez‐matos Juan Antonio 
Published: May 2010

AbstractCharcot–Marie–Tooth (CMT) disease is a heterogeneous group of inherited sensory and motor neuropathies. Mutations in the gene that encodes for myelin protein zero (MPZ) can produce different phenotypes: CMT1 (with low conduction velocities), CMT2 (less frequent and with unaffected conduction velocities), and CMTID (with intermediate conduction velocities). We report a study of seven patients from a four‐generation family. All the affected members of the family had a typical CMT phenotype, but three of them had calf hypertrophy. The nerve conduction velocities (NCV) in all of them were between 35 and 43 m/s. Molecular study revealed the novel mutation Lys214Met in the MPZ gene. Molecular study of the MPZ gene would be useful in cases of CMT in families with intermediate NCV, especially if no mutations in the GJB‐1 gene are found or there is male‐to‐male transmission. Muscle Nerve, 2010
Characterization of skeletal muscle effects associated with daptomycin in rats
Authors: Kostrominova Tatiana Y. , Hassett Cheryl A. , Rader Erik P. , Davis Carol , Larkin Lisa M. , Coleman Scott , Oleson Frederick B. , Faulkner John A. 
Published: May 2010

AbstractDaptomycin is a lipopeptide antibiotic with strong bactericidal effects against Gram‐positive bacteria and minor side effects on skeletal muscles. The type and magnitude of the early effect of daptomycin on skeletal muscles of rats was quantified by histopathology, examination of contractile properties, Evans Blue Dye uptake, and effect on the patch repair process. A single dose of daptomycin of up to 200 mg/kg had no effect on muscle fibers. A dose of 150 mg/kg of daptomycin, twice per day for 3 days, produced a small number of myofibers (≤0.22%) with loss of plasma membrane integrity and/or infiltration by neutrophils and/or macrophages. Multiple doses of daptomycin are required for a quantifiable effect on skeletal muscles of rats. Some fibers were Evans Blue Dye–positive but were not yet infiltrated by neutrophils. This suggests that the sarcolemma may be the primary target for the observed effects. Muscle Nerve, 2010
Sequencing protocols to genotype mdx, mdx4cv, and mdx5cv mice
Authors: Banks Glen B. , Combs Ariana C. , Chamberlain Jeffrey S. 
Published: May 2010

AbstractCurrently available polymerase chain reaction (PCR) genotyping methods for point mutations in the mouse dystrophin gene can lead to false positives and result in wasted time and money due to breeding or treating the wrong mice. Here we describe a simple and accurate method for sequencing the point mutations in mdx, mdx4cv, and mdx5cv mice. This method clearly distinguishes between wildtype, heterozygous, and mutant transcripts, and thereby time and money can be saved by avoiding false positives. Muscle Nerve, 2010
Photogeneration of free charge carriers in tenuously packed π conjugated polymer chains
Authors: Menšík Miroslav , Pfleger Jiří , Rybak Andrzej , Jung Jaroslaw , Ulański Jacek , Halašová Klára , Vohlídal Jiří 
Published: May 2010

AbstractA new theoretical insight into the process of free charge carrier photogeneration in polymers is introduced, based on the fact that increasing intensity of electric field may change the charge dynamics during the dissociation process of geminate pairs of photogenerated charge carriers. These changes are reflected in the model by the variation of internal parameters such as permittivity and effective mass of the hole. We used this approach to modify the model recently designed by Arkhipov, Emelianova and Baessler, describing a thermally activated escape of a hole from a quantum well in a Coulombic field of a localized electron. Our approach is particularly suitable for the description of the charge carrier photogeneration process in a polymer consisted of tenuously packed π conjugated polymer chains, as documented by its application to the experimental results of charge carrier photogeneration in poly{1‐[4‐(trimethylsilyl)phenyl]‐2‐phenylacetylene} measured by the photoinduced discharge (PID) technique. Namely, we have observed that the photogeneration yield of free charge carriers does not exhibit a transition to a plateau at the low electric field limit but a steep slope of its dependence on electric field is found. Compared to previously published models, that even consider a limited dimensionality of the process or charge carrier trapping, a marked improvement of the consistency of calculated values with experimental data was achieved. Copyright © 2010 John Wiley & Sons, Ltd.