bluuebunny/crossref_metadata_2025_split huggingface dataset:
Miniature 1.87‐dB insertion‐loss V‐band CMOS bandpass filter with two enhanced finite transmission zeros
Authors: Chang Jin‐Fa , Lin Yo‐Sheng 
Published: May 2010

AbstractIn this article, we demonstrate a miniature low‐insertion‐loss V‐band bandpass filter with two finite transmission zeros by standard 0.13‐μm CMOS technology.The proposed filter architecture has the following feature: the low‐frequency transmission‐zero and the high‐frequency transmission‐zero can be tuned by the series‐feedback capacitorCsand the parallel‐feedback capacitorCp, respectively. ParallelLCcircuits (i.e.,C12in parallel withLC1‐C11‐LC2andC22in parallel withLC3‐C21‐LC4) are used for implementingC1andC2to improve the roll‐off characteristic at high frequency and the depth of the upper notch. Besides, low‐insertion‐loss was achieved by adopting thick microstrip‐line (MSL) with optimized ground‐plane pattern as the needed inductors to minimize both the metal loss and the substrate loss. Over the frequency range of 49.5–82.5 GHz, the filter achieved insertion‐loss (1/S21) lower than 3 dB, and input return loss (S11) and output return loss (S22) better than −10 dB. The minimum insertion‐loss was 1.87 dB at 66.5 GHz, a state‐of‐the‐art result for a V‐band CMOS bandpass filter. The chip area was only 0.466 × 0.307 mm2, i.e., 0.143 mm2, excluding the test pads. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1830–1836, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25302
On the noise measurements and modeling for on wafer HEMTs up to 26.5 GHz
Authors: Caddemi Alina , Crupi Giovanni 
Published: May 2010

AbstractThe present article details a technique for measuring and modeling the noise properties of on wafer active solid state devices. This technique is based on 50 Ω noise figure measurements up to 26.5 GHz. A good agreement between measurements and model simulations is obtained at such high frequency, thanks to the inclusion of the nonquasi‐static effect associated to the intrinsic feed‐back resistance. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1799–1803, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25304
Optical variable gain tilt filter with temperature compensation
Authors: Ji Jun , Zheng Shilie , Jin Xiaofeng , Zhang Xianmin , Chi Hao , Zou Yingyin Kevin 
Published: May 2010

AbstractBy analyzing the transmission function of a voltage‐controlled electro‐optic transparent ceramic material, OptoCeramic® PMN‐PT based variable gain tilt filter (VGTF), its temperature‐dependent properties are obtained and a temperature‐dependent calculation model is established with the temperature‐dependent coefficients obtained by the combination of experimental and numerical methods. Then through the real‐time temperature surveillance, the control voltages can be dynamically adjusted via a USB interface and the VGTF achieves precise control and remains stable within temperature range from 25°C to 70°C. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1906–1909, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25311
Dual band–rejected microstrip antenna for WiMAX/WLAN applications
Authors: Lin Shun‐Yun , Ke Bi‐Jin 
Published: May 2010

AbstractIn this article, we propose a novel design to obtain dual band–rejected characteristics in printed microstrip antenna.First, an ultrawide operating band from 2.15 GHz to about 6.50 GHz is achieved by locating the rectangular radiating patch above a larger rectangular notch cut in the finite ground plane edge. Two folded strips with different length protrude from the patch corner with null surface current to introduce dual rejected band. The longer strip and shorter strip are independently associated with lower and upper rejected band. By suitable adjustment in strip lengths, two rejected bands centered at 3 and 4.7 GHz are successfully introduced. Also, a triband operation for 2.5/3.5/5.5 GHz WiMAX and 2.4/5.2/5.8 GHz WLAN applications is achieved for the proposed microstrip antenna. Details of the design considerations are presented, and results of the implemented prototype are discussed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1901–1905, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25312
A compact DVB‐H antenna with varactor‐tuned matching circuit
Authors: Li Yue , Zhang Zhijun , Chen Wenhua , Feng Zhenghe , Iskander Magdy F. 
Published: May 2010

AbstractA reconfigurable varactor‐based matching circuit is proposed in this article. The introduction of an extra series inductor into the matching circuit reduces the required capacitance ratio of the varactor from 27.9 to 8.2. A meander line DVB‐H antenna is designed and fabricated to verify the concept. The dimensions of the prototype antenna are 80 × 10 × 10 mm3, and it can provide better than −10 dB return loss across the 470–770 MHz bandwidth. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1786–1789, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25317
A polarization selective series‐fed array antenna
Authors: Im Yun‐Taek , Lee Jee‐Hoon , Jeong Yong‐Woo , Sang‐Ik Lee , Park Seong‐Ook 
Published: May 2010

AbstractA series‐fed elliptically polarized array antenna is proposed for X‐band systems. Symmetrical series feeding at the array antenna center and truncated patches are applied to reduce side lobe levels (SLL) by modeling the array factor. A series‐fed elliptically polarized array antenna is proposed for X‐band systems. Symmetrical series feeding at the array antenna center and truncated patches are applied to reduce SLLs by modeling the array factor. The measured gain is 24.8 dBic and the axial ratio is between 3 and 6 dB. The SLLs are −19.0 and −16.2 dB in thezxandyzplane, respectively. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1861–1864, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25323
Prediction of the gap of electromagnetic band gap structures in a parallel‐plate waveguide environment
Authors: Shahparnia Shahrooz , Mohajer‐Iravani Baharak , M. Ramahi Omar 
Published: May 2010

AbstractIn this article the design, fabrication, and testing of several electromagnetic band gap (EBG) structures used to mitigate switching noise in high speed printed circuit boards is presented. Some features of these surfaces are considered as variables and results from different band gap prediction techniques are compared to actual fabricated parallel plate waveguides. The strength and weaknesses of these prediction techniques is shown and the power of full wave analysis to predict the band gap of these EBG structures and the limitation of simple L‐C models are discussed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1792–1795, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25327
Novel VANET using a simultaneous wireless up–down link
Authors: Mitatha Somsak , Bunruangses Montree , Sunat Khamron , Yupapin P. P. 
Published: May 2010

AbstractWe propose a new design of a Vehicular Ad Hoc network (VANET) system that uses the dense wavelength division multiplexing wavelength enhancement, whereas the increasing in channel capacity and signal security can be provided. The increasing in number of channel can be obtained by the increasing in wavelength density, while the security is introduced by the specific wavelength filter, which is operated by the central operator. The optical communication wavelength enhancement is reviewed. The advantage is that the proposed system can be implemented and used incorporating with the existed communication link in either wire/wireless system, where the privacy can be provided, which is discussed in detail. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1764–1768, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25328
Planar antennas for passive UHF RFID tags on flexible copper clad laminate
Authors: Kumar Arun , Parkash Davinder , Kartikeyan M.V. 
Published: May 2010

AbstractIn this article, planar antenna designs for passive RFID tags for ETSI and FCC band are discussed. Performance of designs is evaluated by monitoring conjugate match factor and radiation efficiency. The proposed antenna designs were fabricated on a flexible copper clad laminate of thickness 5 mil, and the read range of proposed tags were measured. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1761–1763, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25329
Design method for satellite output multiplexer low‐pass filters exhibiting spurious‐free frequency behavior and high‐power operation
Authors: Arregui I. , Arnedo I. , Lujambio A. , Chudzik M. , Laso M.A. G. , Lopetegi T. , Sorolla M. 
Published: May 2010

AbstractIn this article, a design method for high‐power low‐pass filters with wide rejection band is proposed for rectangular waveguide technology. The new filters consist of a classical high‐power E‐plane corrugated low‐pass filter that is cascaded with a quasi‐periodic structure tuned to reject its undesired intrinsic spurious passbands. The new design technique presented here does not impose any limitations on the gap aperture of the original E‐plane corrugated filter. This allows the minimum gap of the corrugated filter to be kept wide which, along with the smoothness and the wide gap of the quasi‐periodic structure itself, enables high‐power TE10 mode operation in the whole structure as the spurious passbands are suppressed. An example will be given in Ku‐band. The resulting prototype will have several kilowatts handling capability and the spurious passbands will be suppressed up to the third harmonic (around 40 GHz). The new design method may have an important practical impact in the design of the low‐pass filter required at the output of the satellite output multiplexers. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1724–1728, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25331
Multiband MIMO antenna with independent resonance frequency adjustability
Authors: Han Min‐Seok , Choi Jaehoon 
Published: May 2010

AbstractA compact multiband multiple‐input multiple‐output (MIMO) antenna with a band stop matching circuit for next generation mobile applications is proposed. The proposed multiband MIMO antenna consists of two dual‐band planar inverted‐F antennas, which provide wideband characteristics. To improve the isolation characteristic at the long term evolution band, a band stop matching circuit was inserted at the corner of each antenna element. The proposed MIMO antenna has isolation of ∼15 dB at the lower band and over 20 dB at the upper band. In addition, the resonant frequencies of the proposed MIMO antenna can be independently tuned by changing the value of the inductor or by adjusting the widths of Slit1 and Slit2. To evaluate the performance of the proposed antenna, key performance parameters such as total efficiency, envelope correlation coefficient, mean effective gain (MEG), and the MEG ratio are analyzed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1893–1901, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25334
Design of high‐gain low‐profile resonant cavity antenna using metamaterial superstrate
Authors: Zhao Gang , Jiao Yong‐Chang , Zhang Fan , Zhang Fu‐Shun 
Published: May 2010

AbstractIn this article, we present a high‐gain low‐profile resonant cavity antenna that utilizes a novel metamaterial surface as a superstrate. Due to the low‐reflection phase value of the metamaterial superstrate, the thickness of the resonant cavity antenna is significantly thinner than the operating wavelength. Several important parameters that characterize the metamaterial superstrate are investigated based on the unit cell simulation. The proposed antenna is fabricated and measured. The experimental results show that the prototype can provide a high‐gain at the operating frequency. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1855–1858, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25336
A low phase noise PMOS tuned‐input tuned‐output voltage controlled oscillator in 0.18 μm CMOS technology
Authors: Nguyen Tai Nghia , Lee Jong‐Wook 
Published: May 2010

AbstractA low phase noise tuned‐input tuned‐output (TITO) voltage‐controlled oscillator (VCO) using PMOS transistors is presented in this article.The TITO‐VCO, implemented using a 0.18 μm RF CMOS process, resulted in a phase noise performance of −118 dBc/Hz at 1 MHz offset from the center frequency of 4.7 GHz. The figure‐of‐merit of the TITO‐VCO was 188 dB. To the author's knowledge, this is the first report on the measured performance of differential TITO‐VCO implemented using PMOS transistors. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1852–1855, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25341
A CMOS differential fifth‐derivative Gaussian pulse generator for UWB applications
Authors: He Jin , Zhang Y. P. 
Published: May 2010

AbstractA CMOS differential fifth‐derivative Gaussian pulse generator is presented for Ultrawideband (UWB) applications. The design exhibits low‐power consumption, low‐circuit complexity, and precise pulse shape to inherently comply with the FCC spectrum mask for indoor UWB applications without the need for a filter. The proposed differential pulse generator was implemented with a 1.8‐V, 0.18‐μm CMOS process, but only the positive fifth‐derivative Gaussian pulse was measured owing to the limitation of the available testing facilities. The measured pulse has peak‐to‐peak amplitude of 154 mV and a pulse width of 820 ps. Small core area of the differential pulse generator is only 0.028 mm2 because of its all digital circuit design. The average power dissipation is 1.2 mW with a pulse repetition frequency (PRF) of 50 MHz. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1849–1852, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25342
A dielectric corrugated feed horn antenna for satellite communication applications
Authors: Secmen M. , Hizal A. 
Published: May 2010

AbstractIn this study, a dielectric corrugated antenna, as being a feed horn antenna of the reflector antenna for satellite communication applications, is analyzed. The structure consists of a conical dielectric corrugated antenna terminated with a conductor hyperbolic (convex) plate. The antenna system provides a Gaussian beam within wide frequency bandwidth with its dielectric structure. The antenna is simulated and tested for its return loss and radiation performances, and the satisfactory results are obtained for C band satellite communication applications. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1709–1713, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25350
Neuromuscular junction morphology, fiber‐type proportions, and satellite‐cell proliferation rates are altered in MyoD−/− mice
Authors: Macharia Raymond , Otto Anthony , Valasek Petr , Patel Ketan 
Published: May 2010

AbstractGene compensation by members of the myogenic regulatory factor (MRF) family has been proposed to explain the apparent normal adult phenotype of MyoD−/− mice. Nerve and field stimulation were used to investigate contraction properties of muscle from MyoD−/− mice, and molecular approaches were used to investigate satellite‐cell behavior. We demonstrate that MyoD deletion results in major alterations in the organization of the neuromuscular junction, which have a dramatic influence on the physiological contractile properties of skeletal muscle. Second, we show that the lineage progression of satellite cells (especially initial proliferation) in the absence of MyoD is abnormal and linked to perturbations in the nuclear localization of β‐catenin, a key readout of canonical Wnt signaling. These results show that MyoD has unique functions in both developing and adult skeletal muscle that are not carried out by other members of the MRF family. Muscle Nerve, 2010
Single‐step technique allowing formation of microscaled thermally stable polymer honeycomb reliefs demonstrating reversible wettability
Authors: Bormashenko Edward , Balter Sagi , Pogreb Roman , Aurbach Doron 
Published: May 2010

AbstractThe procedure allowing single‐step formation of microscaled thermostable polymer honeycomb patterns is reported. Polymer substrates soluble in chlorinated solvents were pulled from the solvents before their final dissolution and placed into a humid atmosphere. Honeycomb patterns were deposited by this method on polyetherimide, polysulfone (PSF), and polyethersulfone (PESF) substrates. PSF and PESF substrates demonstrated reversibly switchable wetting under UV irradiation/heating cycles strengthened by the Cassie–Baxter wetting regime. Copyright © 2010 John Wiley & Sons, Ltd.
Preparation and structural properties of PbSe nanomaterial
Authors: Terra F. S. , Mahmoud G. M. , Nasr Mahmoud , Okr M. M. El 
Published: May 2010

AbstractLead selenide nanostrucured material was prepared by hydrothermal method. 50 mg of PEG and 2.4 g of NaOH were added to 50 ml of deionized water, then 1 mM each of NaSeO3 and PbAc were added to the solution. 10 ml of hydrazine hydrate was added to the solution and transferred into a Teflon‐lined autoclave. The reactants were heated for 9, 10 and 11 h. This process was repeated twice the prementioned concentration. X‐ray diffraction, scanning electron microscopy and energy dispersive X‐ray analyses were carried out for the prepared powdered material. The crystallite size was determined from the X‐ray diffraction and found to be in the nanometer size range. Transmission electron microscopy and electron diffraction were carried out for PbSe films prepared from ultrasonically dispersed PbSe suspension. The interplanar spacings, d (A° ) were determined from the obtained electron diffraction. The most suitable preparation condition is 10 h heating time, and the previously reported reactants concentration, since in this condition were well formed nanocubes spread all over the TEM screen area were observed. Copyright © 2010 John Wiley & Sons, Ltd.
Development and validation of a test for environmental estrogens: Checking xeno‐estrogen activity by CXCL12 secretion in BREAST CANCER CELL LINES (CXCL‐test)
Authors: Habauzit D. , Boudot A. , Kerdivel G. , Flouriot G. , Pakdel F. 
Published: May 2010

AbstractSeveral methods have been developed to evaluate and quantify the effects of Endocrine disruptor chemicals (EDC). Nevertheless, most of these methods are time‐consuming or not enough sensitive to detect EDC at the environmental range. To link the biological effect of tested EDC to natural protein secretion, we have developed a new screening method based on the secretion of the cytokine CXCL12 (or SDF‐1, Stroma‐cell Derived Factor 1), which plays a capital role in cell survival and migration. We have demonstrated that CXCL12 secretion is regulated by estrogenic compounds in a dose‐dependent way in ER‐positive breast cancer cell lines (MCF‐7 and T47D). By combining cell culture and ELISA test, we used this up‐regulation of CXCL12 secretion to test several major environmental contaminants. Our results showed that 17β‐estradiol (from 10−11 M), 17α‐ethynylestradiol (from 10−12 M), genistein (from 10−8 M) and bisphenol A (from 10−6 M) dose‐regulate CXCL12 secretion in T47D. In contrast, antiestrogens, raloxifen and 4‐hydroxytamoxifen, had no effect on the CXCL12 secretion, but were able to inhibit E2 effect. Moreover, we used cell proliferation assays to evaluate the effect of these different compounds on the growth of T47D cells. We found strong correlation (P = 0.7) between proliferation and CXCL12 secretion. However CXCL12 secretion was as sensitive as cell proliferation assays but appeared more rapid. Thus, this bioassay named CXCL‐test (for Checking Xeno‐estrogen activity by CXCL12 secretion in breast cancer cell Lines) constitutes a fast and sensitive method for the detection of estrogenic compounds allowing in 14 h to achieve a detection limit of 10−11 M of E2 (2.7 ng/L). © 2010 Wiley Periodicals, Inc. Environ Toxicol, 2010.
Supercritical Carbon Dioxide Extraction of Microula sikkimensis Seed Oil
Authors: Lina Shi , Fei Ren , Xudong Zhao , Yangong Du , Fa Han 
Published: May 2010

AbstractThe seed oil of Microula sikkimensis had been intensively studied due to its pharmacological actions. In the present study, seed oil of Microula sikkimensis was extracted using supercritical fluid extraction (SFE). Determinations of the extracts composition were performed by gas chromatography (GC). An orthogonal array design (OAD), OA9 (34), was employed for optimization of the supercritical fluid extraction of the compound with regard to the various parameters. Four factors, namely pressure (21.0–27.0 MPa), the dynamic extraction time, temperature, and CO2 flow rate of the supercritical fluid, were studied and optimized by a three‐level OAD. The effects of the parameters on the yield of seed oil were studied using analysis of variance (ANOVA). The results revealed that the pressure had a significant effect on the yield of seed oil (p < 0.05), while the other three factors, i.e., CO2 flow rate, dynamic extraction time and temperature, were not identified as significant factors under the selected conditions based on ANOVA. The results show that the best values for the extraction condition of seed oil was pressure 24.0 MPa, extraction time 3 h, temperature 45 °C and a CO2 flow rate 20 L/h in the 20‐L vessel.
Parenteral and enteral feeding in preterm piglets differently affects extracellular matrix proteins, enterocyte proliferation and apoptosis in the small intestine
Authors: Oste Marijke , De Vos Maartje , Van Haver Els , Van Brantegem Leen , Thymann Thomas , Sangild Per , Weyns Andre , Van Ginneken Chris 
Published: May 2010

The preterm intestine is immature and responds differently to total parenteral nutrition (TPN) and enteral nutrition, compared with the term intestine. We hypothesised that in preterms, diet composition and feeding route affect mucosal morphology, enterocyte mitosis and apoptosis, and the distribution of laminin-1, fibronectin and collagen IV (extracellular matrix proteins (ECMP)). Preterm piglets (93·5 % of gestation) were delivered via caesarean section and birth weight-matched allocated to one of the four experimental groups: the piglets were either euthanised immediately after delivery, after 3 d of TPN or after 2 d enteral feeding with colostrum or milk formula, following 3 d of TPN. We combined immunohistochemistry, image analysis and stereological measurements to describe the intestinal mucosal layer. No significant changes occurred after 3 d of TPN. Feeding colostrum or milk replacer for 2 d after TPN was associated with an increased crypt depth. Only enteral feeding with colostrum resulted in an increased villus height and mitotic index. Neither TPN nor enteral feeding changed the distribution pattern of ECMP or the occurrence of bifid crypts. The immature distribution pattern of ECMP in TPN-fed piglets, coupled with unchanged enterocyte mitosis and apoptosis indices, illustrates that feeding preterm pigs 3 d TPN does not lead to mucosal atrophy. Despite the invariable distribution of ECMP, colostrum was associated with crypt hyperplasia resulting in an increased villus height. These data illustrate that some mechanisms regulating cell turnover are immature in preterms and may in part explain the abnormal gut responses to TPN and enteral feeding in prematurely born pigs.