bluuebunny/crossref_metadata_2025_split huggingface dataset:
Combining cell transplants or gene therapy with deep brain stimulation for Parkinson's disease
Authors: Rowland Nathan C. , Starr Philip A. , Larson Paul S. , Ostrem Jill L. , Marks William J. , Lim Daniel A. 
Published: December 2014

AbstractCell transplantation and gene therapy each show promise to enhance the treatment of Parkinson's disease (PD). However, because cell transplantation and gene therapy generally require direct delivery to the central nervous system, clinical trial design involves unique scientific, ethical, and financial concerns related to the invasive nature of the procedure. Typically, such biologics have been tested in PD patients who have not received any neurosurgical intervention. Here, we suggest that PD patients undergoing deep brain stimulation (DBS) device implantation are an ideal patient population for the clinical evaluation of cell transplantation and gene therapy. Randomizing subjects to an experimental group that receives the biologic concurrently with the DBS implantation—or to a control group that receives the DBS treatment alone—has several compelling advantages. First, this study design enables the participation of patients likely to benefit from DBS, many of whom simultaneously meet the inclusion criteria of biologic studies. Second, the need for a sham neurosurgical procedure is eliminated, which may reduce ethical concerns, promote patient recruitment, and enhance the blinding of surgical trials. Third, testing the biologic by “piggybacking” onto an established, reimbursable procedure should reduce the cost of clinical trials, which may allow a greater number of biologics to reach this critical stage of research translation. Finally, this clinical trial design may lead to combinatorial treatment strategies that provide PD patients with more durable control over disabling motor symptoms. By combining neuromodulation with biologics, we may also reveal important treatment paradigms relevant to other diseases of the brain. © 2014 International Parkinson and Movement Disorder Society
Switchable dual‐wavelength single‐longitudinal‐mode erbium‐doped fiber laser based on a thin‐core fiber comb filter and saturable absorber
Authors: He Wei , Zhu Lianqing 
Published: December 2014

ABSTRACTA tunable dual‐wavelength single‐longitudinal‐mode erbium‐doped fiber laser using thin‐core fiber comb filter (TCFCF) and a saturable absorber is proposed. TCFCF is achieved by splicing a thin‐core fiber between two single‐mode fibers. Two lasers incurred shifts of 1 and <3 pm, and corresponding 3‐dB linewidths are 3.4 and 3.0 kHz, respectively. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:287–292, 2015
Realizing frequency division multiple access with passive wireless intermodulation communication sensors
Authors: Song Jinsong , Pesonen Nadine , Viikari Ville , Seppä Heikki 
Published: December 2014

ABSTRACTIn this letter, we introduce a frequency division concept for passive wireless sensors utilizing the intermodulation communication principle. This concept enables multiple identifications (IDs) and multiple access protocol when several sensors are within the reading range of the corresponding reader. The ID and multiple access scheme based on frequency division is experimentally demonstrated with 10 binary passive wireless sensors operating simultaneously in the 866 MHz UHF band. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:274–277, 2015
Design of a location‐tracking antenna for transport containers
Authors: Kang Sang‐Won , Lee Eun‐Kyu , Chang Tae‐Soon 
Published: December 2014

ABSTRACTThis article presents the design of a GPS/GLONASS bandwidth antenna used to track location information of containers and a GSM/WCDMA antenna to transmit information over mobile networks. Both antennas are placed within a single board. A microstrip patch antenna capable of supporting both GPS and GLONASS was optimized and sized at 25 × 25 × 5 mm3. A chip monopole antenna capable of supporting both GSM and WCDMA bandwidths was optimized and sized at 27 × 8 × 3.2 mm3. To amplify the reception level from satellites, a two‐stage low noise amplifier was designed. The gain was 27 dB. The jig used to measure the antenna size is 100 × 30 × 1 mm3. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:310–314, 2015
Microstrip antenna with complementary split ring resonator loaded ground plane for gain enhancement
Authors: Pandeeswari R. , Raghavan S. 
Published: December 2014

ABSTRACTIn this article, microstrip patch antenna with complementary split ring resonator (CSRR) loaded ground plane is proposed for gain improvement. Gain was improved by introducing CSRR slots on the ground plane. The proposed antenna is designed, fabricated, and tested. Measured results are in good agreement with simulation results. The proposed antenna has a size of 40 × 46 × 1.6 mm3. The measured impedance bandwidth is 100 MHz (return loss <−10 dB) from 2.4 to 2.5 GHz, which covers instruments, scientific and measurement (ISM) band applications. Omnidirectional radiation pattern obtained in H‐plane and bidirectional radiation pattern obtained in E‐plane. Parametric study of CSRR was done to obtain best results. The proposed antenna is simple, has good radiation pattern, and very good gain of 5.93 dBi at resonant frequency. Size reduction of 10% was also achieved and bandwidth is slightly greater than unloaded antenna. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:292–296, 2015
Planar circular patch with elliptical slot antenna for ultrawideband communication applications
Authors: Zhong Yong‐Wei , Yang Guo‐Min , Zheng Li‐Rong 
Published: December 2014

ABSTRACTA novel microstrip slot antenna for ultrawideband (UWB) applications is presented. A circular patch with a tapered microstrip line above an elliptical slot ground plane is adopted for achieving a wide frequency bandwidth (BW). Two circular slots on the ground plane combined with two semicircular slots and four quasi‐triangular slots on the circular patch are designed for BW enhancement and decreasing the lower cut‐off frequency fL. An UWB antenna with a compact size of 300 × 300 mm2 is obtained with relative BW of 187%, which covers 0.34–10.28 GHz. The simulation and experimental results are presented, demonstrating the UWB characteristics of the proposed antenna for wireless communication applications. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:325–328, 2015
A dual‐frequency quasi‐pifa rectenna with a robust voltage doubler for 2.45‐ and 5.8‐GHz wireless power transmission
Authors: Lu Ping , Yang Xue‐Song , Li Jia‐Lin , Wang Bing‐Zhong 
Published: December 2014

ABSTRACTA compact dual‐frequency rectenna has been developed. The receiving antenna is based on a planar inverted F antenna for dual frequency operation. A voltage doubler is proposed to improve the output voltage and the robustness of the rectenna. The simulation and measurement results validate the performance of the rectenna. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:319–322, 2015
Wideband substrate integrated waveguide cavity‐backed spiral‐shaped patch antenna
Authors: Liu Longsheng , Wang Han , Zhang Zhijun , Li Yue , Feng Zhenghe 
Published: December 2014

ABSTRACTA new technique for designing wideband substrate integrated waveguide (SIW) cavity‐backed antenna is presented in this article. The antenna element is composed of a spiral‐shaped patch and an SIW cavity fed by a coaxial probe. It takes advantage of a dual‐resonance observed in the proposed spiral‐shaped patch structure to enhance its bandwidth. A 2 × 1 array is designed to increase the antenna gain. To demonstrate the validity of the bandwidth enhancement technique, prototypes of the proposed antenna element and array for X‐band applications are fabricated and measured. The measure 10‐dB return loss bandwidth of the antenna element is 11.2% (10.306–11.531 GHz) while that of the array is 12.5% (10.292–11.66 GHz). © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:332–337, 2015
Microwave mixer using microstrip rectangular patch resonator
Authors: Kumar Arun , and Sudhabindu , Ray  
Published: December 2014

ABSTRACTIn this article, design of a diode‐based mixer using microstrip rectangular resonator patch is described. A mixer working in down‐conversion mode having minimum conversion loss of 8.6 dB with +10 dBm local oscillator (LO) power and 3 dB radio frequency bandwidth of 180 MHz has been achieved at S‐band. The novelty of the mixer is that it has inherent LO to intermediate frequency (IF) isolation greater than 18 dB without using an IF low pass filter. A systematic design of the mixer is presented with its simulated and experimental results. The mixer design concept presented here can be applied to design mixers at other frequencies. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:381–384, 2015
USE of COC substrates for millimeter‐wave devices
Authors: Maestrojuan Itziar , Palacios Ines , Ederra Iñigo , Gonzalo Ramon 
Published: December 2014

ABSTRACTThis article discusses the use of cyclic olefin copolymer (COC) substrates for development of millimeter wave devices. The improvement of performance thanks to the low losses of these substrates is demonstrated using a millimeter‐wave subharmonic mixer working at 220 GHz as test bench. Furthermore, it is the first time this substrate material is used for designing millimeter‐wave components. Some of its main advantages versus conventional substrates are the low losses at high frequencies, the direct gold sputtering, and the robustness. The measured results show 300 K noise temperature and 0.5 dB conversion loss reduction with respect to those obtained by a similar subharmonic mixer developed on a Rogers substrate. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:371–377, 2015
A dual‐band microstrip annular slot‐based mimo antenna system
Authors: Khan Muhammad Umar , Sharawi Mohammad S. 
Published: December 2014

ABSTRACTA dual‐band multiple‐input‐multiple‐output antenna system covering the 2.45/5.2 GHz WLAN band is presented. The antenna has four elements made up of microstrip annular slots. Two elements cover the lower band while the other two cover the higher band. The presented antenna is compact and occupies a volume of 60 × 60 × 1.5 mm3. The antenna operates with 150 MHz bandwidth in the lower band and 200 MHz bandwidth in the higher band. The minimum measured isolation between the antenna elements is 18 dB in both of its operating bands. The antenna shows good radiation characteristics with a peak operating gain of 3.46 dBi in the lower band and 3.82 dBi in the higher band. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:360–364, 2015
Omnidirectional microstrip monopole antenna design for use in microwave imaging systems
Authors: Ojaroudi N. , Ghadimi N. 
Published: December 2014

ABSTRACTIn this article, a new design of multiresonance monopole antenna for use in microwave imaging systems is presented. The antenna configuration consists of an ordinary square radiating patch, a feed‐line, and a modified ground plane with rotated E‐shaped slot and conductor‐backed plane structures which provides a wide usable fractional bandwidth of more than 135% (2.9–15 GHz). In the presented design, by cutting a rotated E‐shaped slot and also by embedding an E‐shaped parasitic structure in the ground plane, additional resonances at 10.6 and 14.2 GHz can be achieved. Using these structures, the usable upper frequency of the antenna is extended from 10.3 to 15 GHz. The proposed antenna has a symmetrical structure with ordinary square radiating patch, therefore, displays good omnidirectional radiation patterns even at higher frequencies. The antenna has sufficient and acceptable gain level and also its radiation efficiency is greater than 86% across the entire radiating band. The designed antenna has a small dimension. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:395–401, 2015
A high‐denseWDMlight source based on mixing‐modulatedFabry–Perot laser diodes
Authors: Wu Hao , Zhu Ninghua , Liu Jianguo 
Published: December 2014

ABSTRACTA scheme of high‐dense wavelength‐division‐multiplexing light source based on external mixing‐modulated Fabry–Perot laser diode (FP‐LD) is investigated in this article. A 10‐GHz spaced 22‐channel optical carrier supply module is achieved by cascading a multiple‐longitudinal mode FP‐LD with two types of external modulators. Then a 110‐channel extendable light source scheme is proposed. This scheme has potential application prospect in future optical access network. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:403–406, 2015
A novel architecture of satellite‐ground communication system at W‐band based on RF transparent demodulation technique
Authors: Zhang Ziran , Yu Jianjun , Chi Nan , Xiao Jiangnan , Xu Yumin , Fang Yuan 
Published: December 2014

ABSTRACTWe proposed and experimentally demonstrated a novel architecture for the downlink of satellite‐ground communication system at W‐band (75–110 GHz). Radio‐frequency transparent demodulation technique and polarization multiplexing technique are used to reduce the ground system complexity. Quadrature phase shift keying signals (30 Gbaud/s) are transmitted over 15 m wireless link and 50 km fiber. The net bit rate of the whole system is 100 Gb/s while 20% overhead forward error correction (FEC) code is used. Bit‐rate‐error under FEC limit of 2 × 10−2 is achieved at the optical signal noise ratio of 21 dB. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:409–414, 2015
High linearity 3.0–5.0 GHz ultrawideband CMOS up‐conversion mixer with parallel capacitor
Authors: Murad S. A. Z. , Shahimin Mukhzeer Mohamad , Md Isa Mohd Nazrin , Ismail Rizalafande Che , Ahmad Norhawati , Yasin Mohd Najib Mohd 
Published: December 2014

ABSTRACTA high linearity CMOS up‐conversion mixer at 3.0–5.0 GHz for ultrawideband applications is presented. The proposed design is implemented in TSMC 0.18‐μm CMOS technology. A Gilbert‐cell active double‐balanced mixer using a capacitor placed in parallel with the intrinsic gate‐source capacitor of a core mixer to improve linearity is used. To further improve the linearity and input matching, source degeneration inductors is used. In addition, a current injection is designed to increase gain and obtain low power. A 100 MHz intermediate frequency input signal is converted to a 3.0–5.0 GHz radio frequency input signal. The measured input third‐order intercept point (IIP3) is 13.5 dBm with a convention gain of 2.3 dB. Moreover, a low power of 7.1‐mWwith a 1.2‐V power supply is obtained. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:427–429, 2015
Effective wireless low‐power transmission using a phased array antenna
Authors: Park Hongwoo , Kim Hongjoon 
Published: December 2014

ABSTRACTIn this study, we perform a low‐power wireless power transfer experiment to efficiently transfer energy using a phased array antenna (PAA). At the transmitting end, we used a 4 × 4 PAA consisting of left‐handed transmission line‐based compact phase shifters and inset‐feed microstrip patch antennas. The PAA used has a −30° to 30° tilting beam range with a gain ranging from 6.42 to 7.09 dBi. At the receiving end, we used an 8.9‐dBi single Yagi‐Uda rectenna at a distance of 0.8 m from the PAA and measured the converted DC powers to be between 1.5–2.2 mW for the tilting beam range. In the experiment, we limited the effective isotropically radiated power to 3 W because of concerns regarding human body safety. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:421–424, 2015
A high‐speed tunable optoelectronic oscillator with a fine step based on semiconductor optical amplifier
Authors: Chen Han , Xia Mingyu , Sun Mingming , Sun Xiaohan 
Published: December 2014

ABSTRACTAn optical tunable dual‐loop optoelectronic oscillator (OEO) based on birefringence effects in a semiconductor optical amplifier (SOA) is presented and the theoretical fundamentals of the design are explained. A prototype of the OEO with a frequency of 8.8 GHz is experimentally demonstrated. About 150 MHz tunable range at X‐band with a fine step about 15 MHz is realized by directly tuning the SOA injection current, and the tuning speed can reach to over 1 GHz/µs. The generated radiofrequency (RF) signal exhibits a good stability with a single sideband phase noise lower than −101 dBc/Hz at an offset of 10 kHz within the whole tunable range, without any narrow RF band‐pass filters in the loop. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:464–467, 2015
Design and construction of miniaturized UWB microstrip antenna with slots for UWB applications
Authors: Karli Radouane , Ammor Hassan , Terhzaz Jaouad , Chaïbi Mohamed , Mediavilla Sánchez Á. 
Published: December 2014

ABSTRACTIn this article, a miniaturized rectangular printed antenna that meets the ultrawideband (UWB) characteristics in terms of bandwidth and reflection coefficient is proposed. The designed antenna with dimension of 25×16 mm2 (L × W) was fabricated on FR‐4 epoxy dielectric with relative permittivity of 4.4. SMA female connector is used for feeding with characteristic impedance of 50 Ω. The antenna exhibits good UWB characteristics and has the capability of operating between 3.92 to 11.32 GHz. The proposed antenna has omnidirectional radiation pattern on most of the operating band. The measured reflection coefficient of the proposed antenna is compared with the simulated one; good agreement is observed. Also, radiation pattern and gain of the antenna are presented. All simulations are carried out using the EM commercial simulators, HFSS, and CST. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:460–463, 2015
Optical microfiber coupler based humidity sensor with a polyethylene oxide coating
Authors: Bo Lin , Wang Pengfei , Semenova Yuliya , Farrell Gerald 
Published: December 2014

ABSTRACTOptical microfiber couplers (MFCs) with certain geometries are sensitive to local refractive changes. By incorporating a humidity‐sensitive polyethylene oxide coating, a tapered optical MFC can work as a humidity sensor. We fabricated such a humidity sensor and demonstrated its sensing ability by monitoring spectral shifts in a wavelength domain. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:457–460, 2015
Microstrip‐line theory and experimental study for the characterization of the inset‐fed rectangular microstrip‐patch antenna impedance
Authors: Mbinack Clément , Tonye E. , Bajon D. 
Published: December 2014

ABSTRACTAn electromagnetic approach based on the microstrip‐line theory in traveling waves was developed to validate the hypothesis of an eventual evolution of the resonant impedance of the inset‐fed rectangular patch antenna as a cos4 law as a function of the feed position. A second modeling allowing to regard the rectangular patch antenna as a plane capacitor has allowed the establishment of the reflection parameters expression of the overall studied structure using the impedance matrix concept. To end this study, the radiation pattern in 2D and 3D representation of the
electric field components in the Fraunhofer zone at 2.4 GHz is performed. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:514–518, 2015
Ka‐band antipodal fermi‐linear tapered slot antenna with a knife edge corrugation
Authors: Phalak Kiran D. , Briqech Zouhair , Sebak Abderazil 
Published: December 2014

AbstractAn antipodal Fermi‐linear tapered slot antenna (AFLTSA) is presented for Ka‐band applications. A substrate integrated waveguide is used to excite the tapered slot. The proposed design has a measured 26–40 GHz wide impedance bandwidth with a return loss below 15 dB. It maintains a flat gain of 16 dB over an entire frequency band. The knife edges are corrugation profile of AFLTSA exhibits side lobe level of −14 dB in H plane and −19 dB in E plane. It has a symmetric radiation pattern as well as a cross polarization level of −22 dB. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:485–489, 2015
Phase congruency on GPR data for hyperbola identification
Authors: Seyfried Daniel , Jansen Ronald , Schoebel Joerg 
Published: December 2014

ABSTRACTEvaluation of ground‐penetrating radar measurements is often done manually by an operator, which is a time‐intensive task. However, for a large number of images, an automatization of radargrams by means of digital signal processing is advantageous and demanded. An appropriate technique for automated extraction of hyperbolas' parameters, which in turn can be used to draw conclusions on the background medium's properties as well as the targets under investigation buried in ground, is, for example, among many others, the Hough transform. However, the Hough transformation is difficult to handle in real‐world scenarios due to its demanding computational requirements. In either cases, a preselection of domains potentially containing hyperbola structures is of great interest: in the case of manual evaluation, highlighting appropriate domains in the radargrams may provide visual support to the operator, hence accelerating the process. For subsequent digital signal processing, a preselection may significantly reduce processing time as only domains of interest are passed to the next processing stage. In this article, we present an approach by means of which such a preselection of domains containing hyperbola patterns can be obtained. Our approach incorporates phase congruency (PC), which yields a contrast‐independent measure for feature content; hence, it is applicable also for low‐contrast radar data corrupted by noise and clutter. Furthermore, our approach may be used to highlight appropriate features to increase their contrast utilizing PC for hyperbola identification. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:473–478, 2015
Sterically Demanding Unsymmetrical Diaryl‐λ3‐iodanes for Electrophilic Pentafluorophenylation and an Approach to α‐Pentafluorophenyl Carbonyl Compounds with an All‐Carbon Stereocenter
Authors: Matsuzaki Kohei , Okuyama Kenta , Tokunaga Etsuko , Shiro Motoo , Shibata Norio 
Published: December 2014

AbstractInvited for this months cover is the group of Professor Norio Shibata. The cover picture shows the Japanese painting “Genshi‐Chi” (“Primitive Land”) by Mami Shibata: our state‐of‐the‐art reagent for pentafluorophenylation is realized by the cooperation of the halogens fluorine and iodine—elements from the primitive Earth. For more details, see the Communication on 10.1002/open.201402045/full (( p. 233 ff.))