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Relevant bibliographies by topics / Half power beam width

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Academic literature on the topic 'Half power beam width'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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Journal articles on the topic "Half power beam width"

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Kovalchuk, B. M., A. V. Kharlov, S. N. Volkov, et al. "Electron-beam accelerator for pumping of a Xe2 lamp." Laser and Particle Beams 30, no. 1 (2012): 23–29. http://dx.doi.org/10.1017/s0263034611000632.

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AbstractA high-current electron-beam accelerator for pumping of a Xe2 lamp was developed. It is intended for injection of an electron beam into cylindrical gas cavity (diameter of 400 mm, length of 1600 mm, and the absolute pressure up to 3 bars). Two electron diodes in parallel are used in the accelerator. Each diode is connected to a linear transformer driver with vacuum insulation of a secondary turn. The next parameters of the accelerator have been obtained: diode voltage — 550–600 kV, diode current — 276–230 kA, current rise time — 160 ns, maximum power of the electron beam — 130 GW, puls

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Siva Sankara Rao, Yemineni, Kutchibotla Mallikarjuna Rao, and V. V. Subba Rao. "Estimation of damping in riveted short cantilever beams." Journal of Vibration and Control 26, no. 23-24 (2020): 2163–73. http://dx.doi.org/10.1177/1077546320915313.

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In layered and riveted structures, vibration damping happens because of a micro slip that occurs because of a relative motion at the common interfaces of the respective jointed layers. Other parameters that influence the damping mechanism in layered and riveted beams are the amplitude of initial excitation, overall length of the beam, rivet diameter, overall beam thickness, and many layers. In this investigation, using the analytical models such as the Euler–Bernoulli beam theory and Timoshenko beam theory and half-power bandwidth method, the free transverse vibration analysis of layered and r

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Kwak, Kyungmin, Daegil Park, Younghyeon Kim, Wan Kyun Chung, and Jinhyun Kim. "Underwater E-plane Attenuation Model of Omnidirectional Antenna Using Half Power Beam Width (HPBW)." Journal of Institute of Control, Robotics and Systems 21, no. 11 (2015): 1050–56. http://dx.doi.org/10.5302/j.icros.2015.15.0146.

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Peng, Lin, Ji-yang Xie, Xing Jiang, and Cheng-li Ruan. "Design and Analysis of a New ZOR Antenna with Wide Half Power Beam Width (HPBW) Characteristic." Frequenz 71, no. 1-2 (2017): 41–50. http://dx.doi.org/10.1515/freq-2016-0142.

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Abstract Novel zeroth-order resonator (ZOR) composites epsilon-zero resonance (EZR) and mu-zero resonance (MZR) characteristics was proposed. The proposed resonator was constructed by moving via from centre of the conventional mushroom structure (CMS) to the edge, then, an edge-located via mushroom structure (ELV-MS) was formed. Thus, boundary conditions were transformed from all open-ended to half short-ended and half open-ended. Then, the new ZOR composites EZR and MZR characteristics (called EZR-MZR resonator). Owing to the unique characteristic of the composite EZR and MZR, the proposed ZO

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Rudakov, Viacheslav, and Victor Sledkov. "Development of antenna arrays with a beam width 33 degrees at the level of half power." ITM Web of Conferences 30 (2019): 05030. http://dx.doi.org/10.1051/itmconf/20193005030.

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A new design of the antenna array for mobile base stations providing two orthogonal polarizations in 1.71-2.17GHz frequency band is proposed. The antenna array includes 16 radiators, 12 power dividers and two phase shifters disposed on a metal reflector having dimensions 320×1387 mm. The developed antenna array contains less radiators and power dividers than other known antennas of this kind therefore one is cheaper for production. The fabricated sample of the proposed antenna array has return loss is better than -18.5dB and isolation better than 33dB. Beam width in the horizontal plane is equ

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Guoliang, Zhuang, Yu Shusheng, Niu Wanqing, Du Longlong, Li Mingfu, and Jiang Hong. "GW-level high-power CO2 laser system." Laser and Particle Beams 10, no. 3 (1992): 413–19. http://dx.doi.org/10.1017/s0263034600006662.

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A Gw-level high-power CO2 laser system has been developed. A short laser pulse is cut out with a double Pockels cell electrooptical shutter from a hybrid CO2 laser oscillator and amplified with a three-stage dual-path TEA preamplifier, a two-stage TEA preamplifier, a large aperture TEA amplifier, and an electron beam-controlled final amplifier. All parts of the laser system are controlled with a control system. The laser output power is up to 3.2 × 109 W and laser pulse width is 4 ns full width at half maximum.

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Urquhart, J. S., M. G. Hoare, C. R. Purcell, et al. "Characterisation of the Mopra Radio Telescope at 16–50 GHz." Publications of the Astronomical Society of Australia 27, no. 3 (2010): 321–30. http://dx.doi.org/10.1071/as10002.

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AbstractWe present the results of a programme of scanning and mapping observations of astronomical masers and Jupiter designed to characterise the performance of the Mopra Radio Telescope at frequencies between 16 and 50 GHz using the 12-mm and 7-mm receivers. We use these observations to determine the telescope beam size, beam shape, and overall telescope beam efficiency as a function of frequency. We find that the beam size is well fit by λ/D over the frequency range with a correlation coefficient of ∼90%. We determine the telescope main beam efficiencies are between ∼48 and 64% for the 12-m

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Maddineni, Bhavyasri. "Analysis of Beam Forming Antenna using Soft-Computing Techniques." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (2021): 661–65. http://dx.doi.org/10.22214/ijraset.2021.35050.

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Antenna Beam forming is a technology or a technique that is finding increasing use in systems of cellular telecommunication, especially 5G, as well as many other wireless systems. Beam forming refers to the formation of a beam of energy from a set of phased arrays. With the use of phased arrays, it is possible to control the direction and shape of the beam from multiple antennas, based on the spacing between antennas and the phase of signal from each antenna element in the array. Beam forming focuses a wireless signal towards a specific receiving device, rather than having the signal spread in

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Chu, Y. H. "Effects of along- and cross-radar-beam winds on Doppler radar spectrum." Annales Geophysicae 23, no. 3 (2005): 681–92. http://dx.doi.org/10.5194/angeo-23-681-2005.

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Abstract. Beam broadening effects on the Doppler radar spectrum induced by along- and cross-radar-beam winds are theoretically investigated in this article. Analytical expression of beam broadening spectrum for a vertical beam subject to a constant vertical wind in the absence of horizontal wind is derived first. We find that the resultant beam broadening spectral shape is in an exponential form, rather than a Gaussian shape. The peak of the exponential spectrum corresponds to the true vertical wind velocity, and the spectral width σ is a function of vertical wind velocity w and the half-power

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Ching Yu, Low, and Muhammad Ramlee Kamarudin. "5G Fixed Beam Switching on Microstrip Patch Antenna." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 2 (2017): 975. http://dx.doi.org/10.11591/ijece.v7i2.pp975-980.

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<span lang="EN-US">5G technology is using millimeter-wave band to improve the wireless communication system. However, narrow transmitter and receiver beams have caused the beam coverage area to be limited. Due to propagation limitations of mm wave band, beam forming technology with multi-beam based communication system, has been focused to overcome the problem. In this letter, a fixed beam switching method is introduced. By changing the switches, four different configurations of patch array antennas are designed to investigate their performances in terms of radiation patterns, beam formi

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Dissertations / Theses on the topic "Half power beam width"

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Vigil, Jeannine S. "NON-GIMBALED ANTENNA POINTING." International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/609751.

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International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>This paper details the interaction of a small satellite with a space network and estimates the number of contacts and duration of contacts between the small, spin-stabilized satellite and a TDRS satellite. The simulations were performed using Satellite Tool Kit (STK) version 3.0, an orbital analysis software program. STK was configured for the four vehicles representing the spin-stabilized satellite and three TDRS satellites, TDRS East, West, and TDRS Zone of Excl

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Dihissou, Akimu Ayan Niyi. "Système antennaire directif et reconfigurable pour réseaux de capteurs sans fil." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4013/document.

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Les études montrent généralement que la partie radio est l'une des plus grandes sources de consommation d'énergie dans un nœud de capteur. Cette source de consommation est directement liée au type d’antenne utilisé sur le module radio du nœud. Or, nombre de nœuds de capteurs sans fil sont généralement équipés d'antennes omnidirectionnelles provoquant ainsi un gaspillage de l'énergie dû à leur rayonnement. Face à un tel constat, ce mémoire présente des systèmes d'antennes directives et reconfigurables dédiés à ces nœuds capteurs en lieu et place des antennes omnidirectionnelles pour pallier à c

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Corwin, Michael Thomas. "Inductively Loading a Half Width Leaky Wave Antenna to Control the Main Beam Direction." University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1342464210.

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Gajurel, Sanjaya. "Multi-Criteria Direction Antenna Multi-Path Location Aware Routing Protocol for Mobile Ad Hoc Networks." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1197301773.

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Book chapters on the topic "Half power beam width"

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Weik, Martin H. "beam angle between half-power points." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_1429.

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Weik, Martin H. "emission beam angle between half-power points." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_6100.

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"Half-Bridge PWM DC-DC Converter." In Pulse-Width Modulated DC-DC Power Converters. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119009597.ch7.

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"Half-Bridge PWM DC-DC Converter." In Pulse-Width Modulated DC-DC Power Converters. John Wiley & Sons, Ltd., 2012. http://dx.doi.org/10.1002/9780470694640.ch7.

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Yang, Pengfei, and Xue Chen. "Simple Receiving Scheme Based on Balanced Detection for Half-Cycled SSB DD-OFDM Signal." In Machine Learning and Artificial Intelligence. IOS Press, 2020. http://dx.doi.org/10.3233/faia200797.

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In this letter, we proposed a simple balanced-detection reception scheme for the half-cycled single-sideband direct-detected optical orthogonal frequency division multiplexing (HSSB DD-OFDM) signal with decreased guard band. By employing this scheme, each entire OFDM symbol can be recovered perfectly, while the signal-to-signal beat interference (SSBI) can be eliminated, the guard band can be reduced greatly and the tolerance to phase noise induced inter-channel interference (PN-ICI) and potential benefit of low peak to average power (PAPR) are retained. The simulation results demonstrate that a 40 Gbps 16-QAM HSSB DD-OFDM signal was achieved successfully.

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Valtchev, Stanimir, and Svilen S. Valtchev. "Control for the Contactless Series Resonant Energy Converter." In Emerging Capabilities and Applications of Wireless Power Transfer. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-5870-5.ch005.

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This chapter presents control methods applied in the operation of the series loaded series resonant (SLSR) power converters in a most efficient operation zone. The choice of the control method is affected by the objective to guarantee suitably the efficiency, being this method in the same time, relatively easy to apply. The first part of the chapter compares three basic principles of regulation: frequency mode (FM), pulse width mode (PWM), and their combination (PWM/FM). Finally, a new method for instantaneous regulation is developed. The proposed technique consists of a simplified observation of a state variable value to limit each portion of supplied energy, depending on the requirement for power in each half period. The result of this regulation is comparable to the current mode (CM) control applied to the hard-switching power converters. The viability of this new regulation method is demonstrated by simulations of its analogue circuit implementations and experimentally proved. The circuit is also prepared for the changes in the magnetic coupling (contactless energy transfer).

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Gupta, Priya, Anu Gupta, and Abhijit Asati. "Detailed Analysis of Ultra Low Power Column Compression WALLACE and DADDA Multiplier in Sub-Threshold Regime." In Advances in Computational Intelligence and Robotics. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-9474-3.ch004.

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In this chapter, the design and comparative analysis is done in between the most well-known column compression multipliers by Wallace and Dadda in sub-threshold regime. In order to reduce the hardware which ultimately reduces area, power and overall power delay product, an energy efficient basic modules of the multipliers like AND gates, half adders, full adders and partial product generate units have been analyzed for sub-threshold operation. At the last stage ripple carry adder is used in both multipliers. The performance metrics considered for the analysis of the multipliers are: power, delay and PDP. Simulation studies are carried out for 8x8-bit and 16x16-bit input data width. The proposed circuits show energy efficient results with Spectre simulations for the TSMC 180nm CMOS technology at 0.4V supply voltage. The proposed multipliers so implemented outperform its counterparts exhibiting low power consumption and lesser propagation delay as compared to conventional multipliers.

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Meisner, Nadine. "Overture." In Marius Petipa. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190659295.003.0001.

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On 24 May 1847, I reached St Petersburg by ship, and since that time have been employed by the Imperial Theatre. Sixty years of service in one place, in one institution, is quite rare, and a destiny not granted to many mortals. <sup>1</sup> MARIUS PETIPA’S DESTINY, it is true, was exceptional, even if he was only one of many French artists and other foreigners who flocked to Russia because their services were in high demand. For more than a century and a half, Russia had been turning its gaze to the West, seeking to acquire the cultural apparatus that would help transform it into a modern world power. When Petipa arrived in St Petersburg he had the promise of a contract and the hope that he would make a career, if not a fortune, although foreign dancers were rewarded with higher pay than native Russians. He was twenty-nine, not so young for a dancer. In his suitcase were three scarves, packed by his anxious mother. ‘She was,’ he wrote, ‘very disturbed about the fate of my nose, which would have to bear the onslaught of frosts so severe that even the bears could hardly stand them.’...

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Conference papers on the topic "Half power beam width"

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Zekri, Abdelbasset Bedda, Riadh Ajgou, and Messaoud Hettiri. "Impact of Azimuth and Elevation Half Power Beam Width on Human Blockage scenarios in mmWave Channels." In 2020 1st International Conference on Communications, Control Systems and Signal Processing (CCSSP). IEEE, 2020. http://dx.doi.org/10.1109/ccssp49278.2020.9151811.

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Sasaki, Ryunosuke, Masakazu Ichimiya, Jinqi Lyu, and Naoto Kasahara. "Frequency Dependency of Beam Collapse due to Vibration Loads." In ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21375.

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Abstract Since the accident at the Fukushima Daiichi power plant, in addition to “design to prevent accidents”, “mitigating the severe accident” has come to be emphasized. Thus, it is necessary to evaluate the actual failure mode under beyond design basis events (BDBEs). In this study, authors focus on the failure mode of piping in nuclear power plants under excessive earthquakes. The piping design of nuclear power plants has been conservative assuming that seismic load acts as load-controlled and the collapse happens by maximum acceleration. However, the test conducted by Electric Power Resea

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Hujare, Pravin P., Anil D. Sahasrabudhe, and Sanket D. Chinchawade. "Experimental and Numerical Analysis of the Effect of Segmentation on Modal Loss Factor of Constrained Layer Damped Beam." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34862.

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This paper presents experimental investigation on the damping effects of constrained layer treatment by cutting the constraining layer and constrained layer of viscoelastic material (VEM). The constraining layer causes shear in the damping material as the structure deforms. The shear deformation occurring in the viscoelastic core is mainly responsible for the dissipation of energy. The shear deformation in the VEM is not significant in regions where the bending moment is maximal. Mostly only extensional deformation occurs in the damping layer. The local high-shear deformation in the damping ma

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Kim, Jeong-Wook, Sol Kim, Jin-Woo Kim, Ghoo Kim, and Jong-Won Yu. "Half Ellipse Magnetic Dipole Antenna for Wide Beam-Width and Low Cross-Polarization." In 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting. IEEE, 2019. http://dx.doi.org/10.1109/apusncursinrsm.2019.8888702.

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Kotb, Kotb M., Abd El-Wahab Hassan, and Essam M. Rashad. "Simplified sinusoidal pulse width modulation for cascaded half-bridge multilevel inverter." In 2016 Eighteenth International Middle East Power Systems Conference (MEPCON). IEEE, 2016. http://dx.doi.org/10.1109/mepcon.2016.7837004.

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Ding, W. J., and W. S. Koh. "Generation and control of strong half cycle THz radiation with ultrashort laser." In 2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS). IEEE, 2014. http://dx.doi.org/10.1109/plasma.2014.7012508.

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Lin, Y.-H., A. Kuthi, W. Schroeder, D. Singleton, J. Sanders, and M. A. Gundersen. "Non-equilibrium plasmas in fuel-air mixtures generated by half of a microwave." In 2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS). IEEE, 2014. http://dx.doi.org/10.1109/plasma.2014.7012671.

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Smolyakov, Andrei. "Overview of various mechanisms leading to oscillations and instabilities in hall plasmas: Applications to Hall thrusters." In 2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS). IEEE, 2014. http://dx.doi.org/10.1109/plasma.2014.7012516.

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Lumsdaine, Arnold. "Topology Optimization of Constrained Damping Layer Treatments." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39021.

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The aim of this research is to determine the optimal shape of a constrained viscoelastic damping layer on an elastic beam by means of topology optimization. The optimization objective is to maximize the system loss factor for the first resonance frequency of the base beam. All previous optimal design studies on viscoelastic lamina have been size or shape optimization studies, assuming a certain topology for the damping treatment. In this study, this assumption is relaxed, allowing an optimal topology to emerge. The loss factor is computed using the Modal Strain Energy method in the optimizatio

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Shavali, V., Reddy G. M. Sreerama, and P. Ramana Reddy. "Reduction of Coupling Transition by Using Half Width Encoding Techniques in Data Bus." In 2018 International conference on computation of power, energy, Information and Communication (ICCPEIC). IEEE, 2018. http://dx.doi.org/10.1109/iccpeic.2018.8525155.

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