bluuebunny/crossref_metadata_2025_split huggingface dataset:
Intrinsic crosstalk analysis of a serial TDM FGB sensor array by using a tunable laser
Authors: Chan C. C. , Jin W. , Wang D. N. , Demokan M. S. 
Published: December 2002

AbstractThe effect of spectral shadowing and multiple reflections in a serial fiber Bragg grating (FBG)‐array are investigated. The wavelength detection errors for the distal FBG (reflectivity = 1%) in a 50‐FBG array are 18 pm and 12 pm for spectral shadowing and multiple reflections, respectively. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 2–4, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10653
Parallel‐plate waveguides with Kronig–Penney morphology as photonic band‐gap filters
Authors: Gómez Álvaro , Lakhtakia Akhlesh , Solano Miguel A. , Vegas Angel 
Published: December 2002

AbstractGuided wave propagation in a parallel‐plate waveguide with Kronig–Penney morphology is analyzed. Modes in the photonic band‐gap (PBG) structure can be classified as either transverse electric or transverse magnetic with respect to the propagation direction. Above the modal cut‐off frequencies, band gaps exist where in propagation is forbidden. The locations and the widths of the band gaps depend on modal order, waveguide height, and the permittivity contrast and relative volumetric proportion of the two materials constituting the unit cell of the PBG structure. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 4–8, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10654
Numerical analysis of local interpolation error for 2D‐MLFMA
Authors: Ohnuki Shinichiro , Chew Weng Cho 
Published: December 2002

AbstractThe error control of local interpolation for a 2D MLFMA will be discussed. The way to select proper parameters is proposed in terms of both numerical accuracy and computational cost. Satisfying the conditions derived in this paper, error can be controlled at the same level as global interpolation, and the computational cost becomes less expensive than the global one. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 8–12, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10655
Analysis of ultra‐wide band signal propagation in an indoor environment
Authors: Schiavone Guy A. , Wahid Parveen , Palaniappan Ravi , Tracy Judd , Dere Troy 
Published: December 2002

AbstractUltra‐wide band signal propagation in an urban environment is measured and studied. The basic concept is to develop, transmit and receive an extremely short duration burst of radio frequency energy‐typically a few tens of pico seconds to a few nanoseconds in duration. The resultant waveforms are extremely broadband, so much so that it is often difficult to determine an actual RF center frequency—thus the term “carrier‐free” [1]. In this paper, the indoor propagation of UWB signals inside an office room is studied. A simulation model of this system is compared with the actual test results. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 13–15, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10656
Shaped‐beam pattern synthesis of equally and unequally spaced linear antenna arrays using a modified tabu search algorithm
Authors: Akdagli Ali , Guney Kerim 
Published: December 2002

AbstractA flexible search technique based on a tabu search algorithm is presented for the shaped‐beam pattern synthesis of linear antenna arrays. To synthesize a desired pattern, element excitations and/or positions are optimally determined. Examples of cosecant, flat‐topped, and pencil beam patterns are given to illustrate the achievable performance. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 16–20, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10657
A simple approach to quasi‐TEM analysis of a planar multiconductor structure embedded in an elliptically stratified environment
Authors: Norgren Martin 
Published: December 2002

AbstractThe quasi‐TEM modes on a planar multiconductor transmission line embedded in an elliptically stratified cross section are considered. Electro‐ and magneto‐static problems are solved using separation of variables in elliptical coordinates. It is shown that asymptotic solutions for the radial dependences of the terms of the series can be used, under certain conditions, on the profiles of stratification. Results about the convergence and the usefulness of the asymptotic solution are presented. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 20–24, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10658
Wideband dielectric resonator antenna for mobile phones
Authors: Kivekäs Outi , Ollikainen Jani , Vainikainen Pertti 
Published: December 2002

AbstractA novel small dual‐resonant dielectric resonator antenna is presented. The antenna has a simple structure, wide bandwidth, and high radiation efficiency. Its radiation pattern is suitable for cellular handset antenna applications. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 25–26, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10659
A proposed stacked microstrip antenna structure for bandwidth enhancement
Authors: Khodier Majid M. , Christodoulou Christos G. 
Published: December 2002

AbstractA new stacked microstrip antenna structure that enhances the bandwidth without changing the resonance frequency is proposed and studied in this paper. The effect of the various antenna parameters on the bandwidth is investigated. The resulting antenna, using the proposed structure, has an ultra‐wide bandwidth of 35%, compared to 21.8% for the conventional stacked antenna structure. The proposed structure has little effect on the antenna's radiation characteristics. The analysis of the proposed structure is carried out using the FDTD method. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 26–28, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10660
Analysis of conical log‐periodic antennas
Authors: Hertel Thorsten W. , Smith Glenn S. 
Published: December 2002

AbstractIn this paper, a new log‐periodic antenna design is investigated using the finite‐difference time‐domain method. The two‐arm, conical log‐periodic antenna is linearly polarized and has uniform performance characteristics over a broad range of frequencies. It is shown that the shape of the antenna arms has a significant impact on the performance and the bandwidth of the antenna. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 28–32, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10661
Data reduction in the NF‐FF transformation with bi‐polar scanning
Authors: D'Agostino F. , Gennarelli C. , Riccio G. , Savarese C. 
Published: December 2002

AbstractAn efficient near‐field–far‐field transformation with bi‐polar scanning, which compensates for the effects of the measurement probe, is proposed in this paper. It is based on the theoretical results relevant to the nonredundant sampling representation of electromagnetic fields and, as a consequence, it requires a number of data—remarkably lower than that needed by the standard bi‐polar technique. Numerical examples assessing the accuracy and the stability of the far‐field reconstruction process are presented. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 32–36, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10662
A comparison of the performance of different tapers in continuous microstrip electromagnetic crystals
Authors: Erro M. J. , Laso M. A. G. , Lopetegi T. , Garde M. J. , Benito D. , Sorolla M. 
Published: December 2002

AbstractThe influence of the window shape in the frequency response of electromagnetic crystals (ECs), made by etching a sinusoidal continuous pattern of constant period and variable amplitude on the ground plane of a microstrip line, is studied in terms of rejection level, bandwidth, side‐lobe level, and stopband abruptness. A new parameter, the equivalent number of periods, is found to be a good estimate of the increase in length needed to maintain the rejection level and bandwidth of the uniform structure, while reducing the secondary lobes by applying a window. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 37–40, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10663
Planar monopole design considerations based on TLM estimation of current density
Authors: Evans J. A. , Ammann M. J. 
Published: December 2002

AbstractIt is shown that a section of the square planar monopole may be removed without significantly effecting antenna impedance or radiation performance. The proposed antenna forms a U‐shaped monopole and offers lower weight, wind resistance, and cost. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 40–42, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10664
A novel ultra‐wideband polarization‐agile antenna
Authors: Pal Ram , Sudhir H. , Bharath Jyothi M. 
Published: December 2002

AbstractA state‐of‐the‐art multi‐octave band‐printed circuit log‐periodic antenna (LPA), which can characterize signal polarization accurately, has been designed and developed. A broadband compact‐size cylindrical cavity has been developed for the LPA. The feeding mechanism for the cavity‐backed structure was implemented using a Chebyshev‐tapered printed circuit balun. The antenna can be flush‐mounted with the platform surface and hence finds wide application in electronic warfare (EW) systems. The technique involved in the development of this antenna and its feeding mechanism along with the measurement results are presented. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 42–46, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10665
A low‐profile folded planar monopole antenna for wireless communication
Authors: Lin Shun‐Yun 
Published: December 2002

AbstractThis paper presents a novel design for a low‐profile planar monopole antenna. The proposed antenna is a rectangular planar monopole with folded end. Its total height is about 0.12 λ0 (the free‐space wavelength of the lowest operating frequency of the antenna), which is lower than other corresponding designs. In this study, a shorting plate is added to the edge of the rectangular plate to decrease the lower frequency for impedance matching. Furthermore, the offset center feeding is used to increase the upper frequency. Experimental results obtained from the constructed prototype show that the impedance bandwidth covers DCS (1720–1880 MHz), PCS (1850–1990 MHz), UMTS (1920–2170 MHz), and ISM (2400–2484 MHz, 5725–5852 MHz) bands. Moreover, the measured monopole‐like radiation patterns prove that the proposed antenna has omni‐directional radiation in the azimuthal plane. These performances suggest that the proposed antenna is suitable for application in wireless communication systems. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 46–48, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10666
A mutual impedance formula between patch antennas based on synthetic asymptote and variable separation
Authors: Sun Y. X. , Chow Y. L. , Fang D. G. 
Published: December 2002

AbstractA formula for mutual impedance between patch antennas is constructed, based on the physics of the static near field and the radiation far field of the couplings. This leads to a synthetic asymptote form [1] of separated variables with center‐to‐center distancerand azimuth angle ϕ. Only 12 coefficients are to be determined by matching, using a full‐wave analysis with commercial software, such as IE3D. Our formula is complete with no restrictions on the detailed structures of patch, feed, and substrate. Numerical examples show that our formula is accurate. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 48–53, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10667
Improved perturbation analysis of a new omnidirectional circular rod antenna with multi dielectric gratings for millimeter‐wave application
Authors: Lin Kaihui , Xu Shanjia 
Published: December 2002

AbstractThe leakage characteristics of a new millimeter‐wave omnidirectional circular rod antenna with multi‐dielectric gratings are analyzed by an improved perturbation method. The analysis yields an expression for the leakage constant in a closed form so that the design procedure of the antenna becomes very convenient. It is found that under conditions of the same dimension of the antenna, the multi‐layer grating antenna has more radiation efficiency than that of the single one. Its accuracy has been verified with the exact solution based on the mode matching method. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 53–55, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10668
An efficient implementation of the PML for truncating FDTD domains
Authors: Ramadan Omar , Oztoprak Abdullah Y. 
Published: December 2002

AbstractAn efficient implementation of the perfectly matched layer (PML) is presented for truncating lossy and lossless finite‐difference time‐domain (FDTD) computational domains. The implementation is based on the stretched coordinate PML formulations and on the derivation of the wave equation in the PML region. Significant savings in computational time and memory storage requirements are achieved. In addition, the FDTD implementation of the new formulations is simpler than the conventional PML formulations. Two dimensional numerical tests have been carried out to validate the proposed formulations. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 55–60, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10669
DC‐2.1 GHz CMOS multiple feedback transimpedance amplifiers with high dynamic range and linearity
Authors: Chiang Ming‐Chou , Chen Ping‐Yu , Lu Shey‐Shi , Meng Chin‐Chun 
Published: December 2002

AbstractA CMOS wideband transimpedance amplifier with multiple‐resistive feedback loops is reported for first time. This amplifier was fabricated by the 0.35‐μm CMOS process. Multiple‐feedback technique was used to achieve terminal impedance matching and wide bandwidth. The experimental results showed that a transimpedance gain of 51.7 dBΩ and a 3‐dB bandwidth of 2.1 GHz were obtained. High input P1dB of −5 dBm and input IP3 of 1 dBm were also measured. The high dynamic range and high linearity achieved were attributed to the multiple feedback technique used. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 60–61, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10670
A broadband cross‐shaped microstripline‐fed no‐offset ring slot antenna
Authors: Jang Yong‐Woong 
Published: December 2002

AbstractA cross‐shaped microstrip‐fed ring slot antenna with large bandwidth is presented experimentally in this paper. The characteristics of the antenna are sensitive to the antenna design parameters. The VSWR, radiation pattern, and antenna gain of this configuration are presented. The measured bandwidth is approximately 77.766% (2.0 ≥ VSWR). © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 61–63, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10671
Analytical models of width‐limited microstrip lines
Authors: Svac̆ina Jir̆í 
Published: December 2002

AbstractA set of closed form relations is proposed for the analysis of two types of width‐limited microstrip lines using a conformal mapping method. New closed‐form equations are derived for microstrip lines with rectangular and/or trapezoidal shaped dielectric substrates, and the computational results are compared with available data from other authors. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 63–65, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10672
Extended multiperiodic traveling wave model for the accurate analysis of the radiation performance of the Sierpinski fractal‐like multiband antenna
Authors: Soler Jordi , Puente Carles , Anguera Jaume 
Published: December 2002

AbstractAn extension of the Multiperiodic Traveling Wave Model to analyze the Sierpinski fractal‐like multiband antenna is presented. The novel extension improves the original model in the calculation of radiation patterns at the higher bands, which permit a better understanding of the radiation mechanism and also gives a complete description of the full radiation pattern. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 67–70, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10673
CPW‐FED rectangular microstrip ring antenna for suppression of parasitic backside radiation
Authors: Zhu Lei , Li Keren 
Published: December 2002

AbstractA coplanar waveguide (CPW)‐fed rectangular microstrip ring antenna is proposed and developed for effective suppression of parasitic backside radiation, and is constructed on the basis of a simple slot‐to‐strip EM coupling principle. Due to the non‐radiative behavior of a CPW short‐end feeding block, this antenna allows us to realize an excellent unidirectional radiation pattern. With the use of our developed fullwave method of moments–short‐open calibration (MoM–SOC) technique, its electrical performance such as input impedance and radiation pattern are extensively investigated in theory. Obtained results demonstrate well that the front‐to‐back radiation ratio of our concern is consistently higher than 30 dB while its narrow bandwidth is incremented twice by simply widening its strip width. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 65–67, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10674
Multiprobe RLSA design for DBS reception
Authors: Sierra‐Castañer M. , Sierra‐Pérez M. , Vera‐Isasa M. , Fernández‐Jambrina J.L. 
Published: December 2002

AbstractA synthesis method for circular‐polarization radial‐line slot antennas excited by four posts inside the radial line is presented. This excitation generates a rotational mode inside the waveguide, and the slots that radiate the field can be placed arranging concentric rings. The reflected field inside the radial line can be controlled. We present the design and a prototype model for this antenna that shows practical results. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 70–72, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10675
Chromatic dispersion effects in millimetre‐wave fibre‐optic links based on optically generated electrical modulation formats
Authors: Fuster J. M. , Roig J. C. , Candelas P. , Marti J. 
Published: December 2002

AbstractThe authors investigate the chromatic dispersion effects in millimeter‐wave upconverting fibre‐optic links employing EOM‐based photonic electrical QAM/PSK modulators. It is shown that, because the carrier suppression effect is mitigated in these links, a transmission system bandwidth wider than in the conventional case is achieved. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 72–74, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10676
Comment on “a PML‐FDTD formulation for the simulation of optical structures”
Authors: Ramadan Omar 
Published: December 2002

AbstractThe focus of this comment is to discuss an important point regarding the derivation of the wave equation in the perfectly matched layer (PML). It is demonstrated that the distance dependency of the PML conductivity profile should be taken into consideration when deriving the wave equation in the PML region. Significant improvements in the absorbing performance are achieved with a small number of PML layers. A numerical test is carried out in one dimension to validate the proposed formulations. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 74–76, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10677
Diplexing feed network for wideband dual‐frequency stacked microstrip patch antenna
Authors: de Haaij D. M. , Joubert J. , Odendaal J. W. 
Published: December 2002

AbstractSimulated and measured results of a diplexing feed network for a wideband dual‐frequency stacked microstrip patch antenna are presented. The microstrip feed network is easy to design and consists of a T‐junction and a single decoupling resonator for each frequency band. The return loss in each of the frequency bands is better than 10 dB, over a better than 10% bandwidth. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 100–102, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10686
A high‐power amplifier using photonic bandgap and coplanar waveguide
Authors: Seo Chulhun 
Published: December 2002

AbstractIn this paper, an R‐band hybrid amplifier with a coplanar‐waveguide (CPW) and photonic‐bandgap (PBG) structure is designed and fabricated. We use PBG and CPW simultaneously in the amplifier to improve power‐added efficiency (PAE) and intermodulation distortion (IMD) in the R‐band. In this paper, the PBG structures are optimized to obtain a matching network. The output impedance of amplifier and the input impedance of PBG are matched to minimize the return loss. The PAE and IMD were improved by 15% and 4.5 dB, respectively, compared with a conventional amplifier. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 108–110, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10689
A C‐band ultra‐low‐power consumption HMIC amplifier for intelligent transportation system applications
Authors: Wen Guangjun , Law Choi Look , Shen Zhongxiang , Aditya Sheel , Li Chao 
Published: December 2002

AbstractA multi‐stage hybrid integrated ultra‐low‐power‐consumption amplifier using a low‐cost silicon bipolar junction transistor for intelligent transportation system (ITS) applications is developed at 5.8 GHz. Under a low dc‐power bias of 3.0 V and 0.92 mA, the designed amplifier shows the state‐of‐the‐art performance with a gain of 32.5 dB, NF of 4.5 dB, input and output return loss of less than −10 dB, and a corresponding −1 dB compression point of −19.6 dBm at 5.8 GHz, achieving a gain‐to‐power‐consumption ratio of 11.78 dB/mW, which is the highest ever reported at C‐band. A design approach that can simultaneously provide high‐gain, low power consumption, low noise figure, and low return loss is presented in this paper. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 112–115, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10691
Research on the radiation characteristics of the reinforced leaky coaxial cable by FDTD and spatial harmonic expansion methods
Authors: Wang Jun Hong 
Published: December 2002

AbstractAn artificial closed cylindrical surface is placed around a reinforced leaky coaxial cable. The field inside the surface is calculated by the finite‐difference time‐domain (FDTD) method. The field outside is expanded by spatial harmonics. By matching the fields of the two regions at the artificial surface, equations for the unknown expansion coefficients are obtained. By solving these equations, the expansion coefficients and, therefore, the radiation field are obtained. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 142–145, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10701