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Literatura académica sobre el tema "Reflector"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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Artículos de revistas sobre el tema "Reflector"

1

Liu, Weixu, Zhifeng Tang, Fuzai Lv, Yang Zheng, Pengfei Zhang, and Xiangxian Chen. "Numerical Investigation of Locating and Identifying Pipeline Reflectors Based on Guided-Wave Circumferential Scanning and Phase Characteristics." Applied Sciences 10, no. 5 (2020): 1799. http://dx.doi.org/10.3390/app10051799.

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The methodology based on reflected guided-wave by a reflector associated with an increase or a decrease in the cross-sectional area has the challenge of determining their location and identity. This paper presents a numerical investigation of a method for locating and identifying the reflector based on guided-wave circumferential scanning and phase characteristics. To determine the axial and circumferential positions of the reflector within the pipeline, the procedures of the guided wave-based circumferential scanning were presented, including data preprocessing, median filter, image smoothing

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2

Bube, Kenneth P., and Robert T. Langan. "Resolution of slowness and reflectors in crosswell tomography with transmission and reflection traveltimes." GEOPHYSICS 73, no. 5 (2008): VE321—VE335. http://dx.doi.org/10.1190/1.2969777.

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We sometimes encounter situations in seismic imaging in which knowing the position of key reflectors between wells would be very useful. In many crosswell data sets, both transmission and reflection traveltimes for selected reflectors can be picked. We investigated the possibility that transmission-plus-reflection crosswell traveltime tomography can determine the position of these reflectors with a high level of accuracy, thereby providing an independent way of verifying (and perhaps improving) the position of these reflectors obtained from crosswell reflection imaging. We studied the effect o

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3

Huang, Wei, Ningye He, Renxia Ning, and Zhenhai Chen. "Wideband Reflector and Analogue Electromagnetically Induced Reflection in Metamaterials." Crystals 11, no. 8 (2021): 985. http://dx.doi.org/10.3390/cryst11080985.

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Metamaterials are highly demanded for advanced applications in absorbers, sensors, and filters. However, metamaterial reflectors, especially broadband reflectors, remain challenging. In this paper, we theoretically investigate a wideband metamaterial reflector which consists of cross shaped graphene strips and a silica (SiO2) substrate. The cross shaped graphene strips are coated on the top of the structure, and the cross shape rotated 45° graphene strips are spun on the bottom of it. The calculated reflection can be tuned through length and width of the graphene strips. By comparison, not onl

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4

Kryuchkov, Igor V., Eduard O. Mozharov, and Anna I. Skachkova. "Special aspects of modulation RCS measurement in Ka-band." ITM Web of Conferences 30 (2019): 11012. http://dx.doi.org/10.1051/itmconf/20193011012.

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Radar reflectors are used as standards for radioelectronic devices calibration, as navigation beacons for air and naval traffic control and for radar visibility increase. Controlled (parametric) reflectors change reflected signal characteristics. This leads to appearance of easily detectable additional frequency components on modulation frequency. Ka-band parametric reflector design, consisting of horn reflector and phase switch 0°/180° board, is suggested. Technique of parametric reflector modulation RCS measurement, using complex envelope of reflected signal in every phase switch state, is s

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5

Parker, Andrew R., David R. Mckenzie, and Maryanne C. J. Large. "Multilayer reflectors in animals using green and gold beetles as contrasting examples." Journal of Experimental Biology 201, no. 9 (1998): 1307–13. http://dx.doi.org/10.1242/jeb.201.9.1307.

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The light reflectors in the beetles Calloodes grayanus and Anoplognathus parvulus are examined. Contrasting multilayer reflectors are revealed. Calloodes grayanus appears a weak green colour, matching its background leaves, while A. parvulus is strongly metallic-gold coloured. The former reflection is diffuse, as the result of a structure causing scattering that overlies the multilayer reflector, whereas the latter reflection is strongly directional. The green colour of C. grayanus is achieved by a multilayer reflector with a fixed spatial periodicity, here termed 'regular', which is far remov

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6

Knapp, R. W. "Fresnel zones in the light of broadband data." GEOPHYSICS 56, no. 3 (1991): 354–59. http://dx.doi.org/10.1190/1.1443049.

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The investigation of zero‐offset response to circular reflectors of increasing Fresnel zone size shows that reflection response is a constant and is independent of reflector size, except when the reflector diameter is so small that the diffractions interfere with the primary reflection. The extent of this effect is dependent upon vertical resolution and the time separation of the primary reflector and the diffraction. Interference occurs for reflectors smaller in diameter than the first Fresnel zone. Migration removes this interference. For broadband data the Fresnel zone solution breaks into

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7

Le, Hien-Thanh, Lanh-Thanh Le, Ming-Jui Chen, et al. "ECE/SAE Dual Functional SuperPin Plus Curved Reflex Reflector by Use of New Structured Corner Cubes." Applied Sciences 10, no. 2 (2020): 454. http://dx.doi.org/10.3390/app10020454.

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We propose and demonstrate, using optical experiments, a new reflex reflector structure called SuperPin Plus. The structure is composed of special pin groups with dihedral-angle offsets in corner cubes. One of the specular features brought by this new design is that it can comply with both the US SAE (US Society of Automotive Engineers) standard and the EU ECE (Economic Commission for Europe) standard, so that manufacturing costs of reflex reflector for both European and American automobile markets can be reduced. By using genetic algorithms for optimization, the angles and the positions of th

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8

Xiao, Dawei, Jingzhuo Zhang, Zichao Chu, and Yi Luo. "Research on the Acoustic Scattering Characteristics of Underwater Corner Reflector Linear Arrays." Sensors 25, no. 7 (2025): 2129. https://doi.org/10.3390/s25072129.

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This manuscript aims to optimize the acoustic scattering characteristics of underwater corner reflector linear arrays through simulation analysis and experimental validation, thereby enhancing their application efficiency in underwater acoustic countermeasures, particularly in terms of increasing acoustic echo intensity and reducing reflection blind spots. The acoustic scattering characteristics of submerged corner reflectors were meticulously simulated using the finite element method–boundary element method coupling technique, and the simulation results were rigorously verified through tank e

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9

TYGEL, MARTIN, JÖRG SCHLEICHER, LÚCIO T. SANTOS, and PETER HUBRAL. "THE KIRCHHOFF–HELMHOLTZ INTEGRAL PAIR." Journal of Computational Acoustics 09, no. 04 (2001): 1383–94. http://dx.doi.org/10.1142/s0218396x01001467.

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The Kirchhoff–Helmholtz integral models the reflected acoustic wavefield by an integration along the reflector over the incident field multiplied by the specular plane-wave reflection coefficient. Based on the structural relationships between the reflector and the reflection-traveltime surface, we design an asymptotic inverse Kirchhoff–Helmholtz integral. Analogously to the forward integral, the proposed inverse consists of an integration along the reflection-traveltime surface over the recorded reflected field. We show that the new inverse integral asymptotically recovers the input to the sta

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10

Ooshaksaraei, P., K. Sopian, R. Zulkifli, M. A. Alghoul, and Saleem H. Zaidi. "Characterization of a Bifacial Photovoltaic Panel Integrated with External Diffuse and Semimirror Type Reflectors." International Journal of Photoenergy 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/465837.

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Silicon wafer accounts for almost one-half the cost of a photovoltaic (PV) panel. A bifacial silicon solar cell is attractive due to its potential of enhancing power generation from the same silicon wafer in comparison with a conventional monofacial solar cell. The bifacial PV cell is able to capture solar radiation by back surface. This ability requires a suitable reflector appropriately oriented and separated from the cell’s rear surface. In order to optimize the bifacial solar cell performance with respect to an external back surface reflector, diffuse and semimirror reflectors were investi

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Tesis sobre el tema "Reflector"

1

Mousari, Bafrooei Seyed Pedram. "Reflector feeds for large adaptive reflector antennas." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ57513.pdf.

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Durnan, Gregory J. "Parasitic Feed Elements for Reflector Antennas." Thesis, Griffith University, 2005. http://hdl.handle.net/10072/368077.

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The use of parasitic wire dipoles are examined when placed in the proximity of a focused dipole feed in a parabolic reflector antenna. These parasitic elements are rotated around the feed dipole and a search is performed for the ideal positioning so as to yield maximum radiated power and main beam shift in order to develop a novel form of angle diversity. In addition a comparison is made between 2 element dipole feed structures and linearly and circularly polarised patch feed structures. In order to analytically model the structure, mutual coupling between feed elements is calculated taking in

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3

Shen, Bing. "Multiple reflector scanning antennas." Diss., Virginia Tech, 1993. http://hdl.handle.net/10919/40108.

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4

Wang, Yang. "Time-modulated reflector-arrays." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/8510/.

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This PhD thesis introduces the time-modulated reflector-arrays which are a hybrid of conventional time-modulated array (TMA) systems and reflectarrays. The TMRAs use a similar layout of reflectarray feed by a source. Compared to conventional phased arrays, reflectarrays and time-modulated arrays, a TMRA is potentially simpler to implement in hardware as it does not need a complicated feeding network or the use of the phase shifting units. Instead of phase shifting units, TMRAs use discrete time-switching to achieve beamforming functions. The concept and operating mechanism of the TMRA is expla

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5

Mas, Baixeras Albert. "Optimization of inverse reflector design." Doctoral thesis, Universitat de Girona, 2011. http://hdl.handle.net/10803/22705.

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Aquesta tesi presenta un nou mètode pel disseny invers de reflectors. Ens hem centrat en tres temes principals: l’ús de fonts de llum reals i complexes, la definició d’un algoritme ràpid pel càlcul de la il•luminació del reflector, i la definició d’un algoritme d’optimització per trobar més eficientment el reflector desitjat. Les fonts de llum estan representades per models near-field, que es comprimeixen amb un error molt petit, fins i tot per fonts de llum amb milions de raigs i objectes a il•luminar molt propers. Llavors proposem un mètode ràpid per obtenir la distribució de la il•luminac

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6

Stewart, Scot Howard. "Multiple feed reflector antenna analysis." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/94472.

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A method of calculating the secondary pattern of a reflector illuminated by a feed array is developed. Geometrical optics is used to determine the incident field via a coordinate transformation approach. The incident field from each element is superimposed to form the total field used in finding the surface currents of the physical optics radiation integral. The technique allows each element to be arbitrarily excited, positioned and oriented. The element patterns may be different allowing mutual coupling to be included.<br>M.S.

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7

Fournier, Florian. "FREEFORM REFLECTOR DESIGN WITH EXTENDED SOURCES." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3146.

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Reflector design stemmed from the need to shape the light emitted by candles or lamps. Over 2,000 years ago people realized that a mirror shaped as a parabola can concentrate light, and thus significantly boosts its intensity, to the point where objects can be set afire. Nowadays many applications require an accurate control of light, such as automotive headlights, streetlights, projection displays, and medical illuminators. In all cases light emitted from a light source can be shaped into a desired target distribution with a reflective surface. Design methods for systems with rotational and t

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8

Parkinson, Joseph R. "The analysis of microwave reflector antennas." Thesis, University of Birmingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342108.

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9

Sterr, U. "Radiation characteristics of corner reflector antennas." Thesis, Queen Mary, University of London, 1998. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1686.

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This thesis presents a study of the radiation characteristics of corner reflector antennas. The influence of the design parameters on the radiation characteristics are assessed using an analytical method and the Finite Difference Time Domain (FDTD) method. The FDTD method for corner reflector antennas which are electrically small to medium sized antennas is developed in detail. The important subject of the Absorbing Boundary Conditions (ABCs) is studied including a study of Mur ABC and Perfectly Matched Layers. It is shown that both methods reduce the reflections from the boundaries sufficient

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10

PEREIRA, LUIS CLAUDIO PALMA. "ASYMPTOTIC ANALYSIS OF SHAPED REFLECTOR ANTENNAS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1988. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8374@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Este trabalho apresenta uma nova técnica para aproximação de uma superfície refletora definida numericamente, i.e., por pontos fornecidos pelo processo de síntese da antena. As limitações inerentes às técnicas usuais são aqui eliminadas pela utilização de Pseudo-Splines Quínticas que interpolam uma distribuição arbitrária de pontos por uma superfície suave, com derivadas primeiras e segundas contínuas, assegurando uma representação única para o domínio de interesse. O procedimento é, então, aplicado ao subrefletor modela

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Libros sobre el tema "Reflector"

1

Geological Survey (U.S.), ed. Radar reflector detection. U.S. Dept. of the Interior, U.S. Geological Survey, 1985.

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2

Harman, J. M. Earth station antenna sidelobe characteristics. U.S. Dept. of Commerce, National Telecommunications and Information Administration, 1985.

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3

Scott, Craig. Modern methods of reflector antenna analysis and design. Artech House, 1990.

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4

Stutzman, Warren L. Feasability study of a synthesis procedure for array feeds to improve radiation performance of large distorted reflector antennas: Final report. Virginia Polytechnic Institute and State University, 1993.

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5

K, Takamizawa, LaPean J, and United States. National Aeronautics and Space Administration., eds. Feasibility study of a synthesis procedure for array feeds to improve radiation performance of large distorted reflector antennas: Final report. Virginia Polytechnic Institute and State University, 1993.

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6

Harman, J. M. Earth station antenna sidelobe characteristics. U.S. Dept. of Commerce, National Telecommunications and Information Administration, 1985.

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7

J, Zakrajsek Robert, and United States. National Aeronautics and Space Administration., eds. Near-field testing of the 30-GHz TRW proof-of-concept Multibeam Antenna. National Aeronautics and Space Administration, 1986.

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8

J, Garrett Michael, and United States. National Aeronautics and Space Administration., eds. Near-field antenna testing using the Hewlett Packard 8510 automated network analyzer. National Aeronautics and Space Administration, 1991.

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9

M, Strickler Walter, and United States. National Aeronautics and Space Administration., eds. Defocussing characteristics of the ACTS, T1-VSAT earth terminal antennas. National Aeronautics and Space Administration, 1994.

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10

Center, Langley Research, ed. Analysis and test of a 16-foot radial rib reflector developmental model. National Aeronautics and Space Administration, Langley Research Center, 1989.

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Capítulos de libros sobre el tema "Reflector"

1

Weik, Martin H. "reflector." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_15852.

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2

Rahmat-Samii, Yahya. "Reflector Antennas." In Encyclopedia of Remote Sensing. Springer New York, 2014. http://dx.doi.org/10.1007/978-0-387-36699-9_93.

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Gooch, Jan W. "Reflex Reflector." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9867.

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4

Bird, Trevor S. "Reflector Antennas." In Handbook of Antenna Technologies. Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-4560-44-3_30.

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Bird, Trevor S. "Reflector Antennas." In Handbook of Antenna Technologies. Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-4560-75-7_30-1.

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Weik, Martin H. "Lambertian reflector." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_9899.

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Weik, Martin H. "retrodirective reflector." In Computer Science and Communications Dictionary. Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_16305.

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Rahmat-Samii, Yahya. "Reflector Antennas." In Antenna Handbook. Springer US, 1988. http://dx.doi.org/10.1007/978-1-4615-6459-1_15.

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9

Moore, Patrick. "Enter the Reflector." In Eyes on the Universe. Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0627-2_4.

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10

Baars, Jacob W. M., and Hans J. Kärcher. "Alternative Reflector Geometries." In Radio Telescope Reflectors. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-65148-4_7.

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Actas de conferencias sobre el tema "Reflector"

1

Darnton, Aaron, and Massimo Ruzzene. "Phase Gradient Approach for Detailed Damage Localization in Composite Rotorcraft Components." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9641.

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Detection, localization and characterization of damage to composite plates are an important topic in today's rotorcraft industry. New methods are required to increase an inspector's ability to assess the criticality of suspected damage. This study explores a new method for mapping damaged materials using the acoustic wave reflection caused by the damage. This paper studies a series of analytical, numerical and experimental simulations to assess the method's ability to determine damaged area's shape. By tracing the gradient of the unwrapped phase of the reflected wave, the reflector, and thus d

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2

Arjunaidi, Ayuni Afiqah, Yoshihide Yamada, Kamilia Kamardin, and Izni Husna Idris. "Focal Region Ray Tracing for Spherical Reflector with Shaped Sub-Reflector." In 2024 International Symposium on Antennas and Propagation (ISAP). IEEE, 2024. https://doi.org/10.1109/isap62502.2024.10846412.

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Abdullah, Norazah, Ayuni Afiqah Arjunaidi, Yoshihide Yamada, and Kamalia Kamardin. "Multibeam Performances of a Spherical Reflector with a Shaped Sub-reflector." In 2024 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE). IEEE, 2024. https://doi.org/10.1109/apace62360.2024.10877342.

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Zheleznova, V. S., and E. V. Ovchinnikova. "Cassegrain-Type Double-Reflector Parabolic Antenna with Transformable Reflector for Small Satellite." In 2025 7th International Youth Conference on Radio Electronics, Electrical and Power Engineering (REEPE). IEEE, 2025. https://doi.org/10.1109/reepe63962.2025.10971172.

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Maddio, P. "Surface error correction of a mesh deployable reflector." In AIMETA 2022. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902431-107.

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Abstract. Large Deployable Reflector (LDR) systems are commonly used as mesh reflectors for large aperture space antennas in aerospace applications since they provide affordability while guaranteeing at the same time a high gain and a high directivity. To improve the surface accuracy several methods have been studied, most of which measure the distance between the cable-net system that forms the reflector surface and the desired paraboloid. In this paper we want to improve the reflector’s ability to convey a greater concentration of reflected rays in the direction of the feed. To deal with thi

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6

Dressler, Max. "Structured tantalum backlight reflector design." In International Optical Design Conference. Optica Publishing Group, 1998. http://dx.doi.org/10.1364/iodc.1998.lwb.6.

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In a spacelab experiment the shadow profile of a metallic alloy sphere of 8 mm diam. shall be imaged by means of LED illumination (640 nm) and backlight reflectors, using telecentric optics. The direction of the incident light does not meet the condition for direct reflection at the plano reflector surface; thus the reflectors must either have diffuse reflexion (model: white paper), act as diffractive elements with the correct blaze angle or consist of micro surfaces that are oriented in space to meet the condition for direct reflection.

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7

Schmauder, T., P. Sauer, and G. Ickes. "New Reflectors and Reflector Coaters." In Society of Vacuum Coaters Annual Technical Conference. Society of Vacuum Coaters, 2014. http://dx.doi.org/10.14332/svc14.proc.1814.

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Sohail, S., H. Naqvi, and Neal C. Gallagher. "Rigorous analysis of scattering from a strip grating twist reflector." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.wbb5.

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Periodic metallic grating structures, with periods of the order of the wavelength of the incident electromagnetic field, influence both the phase and polarization of the reflected field. A convenient decomposition of the polarization is into fast and slow polarized modes, where the magnetic or electric field component parallel to the grating direction, respectively, is zero. In the case of a corrugated surface twist reflector, Kok and Gallagher,1 derived the optimum height required for various angles of incidence in order for the reflected fast and slow polarized modes to be in phase. In pract

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9

Malachias, N., I. Kakavas, S. M. Said Al Harthi, and A. Said Al Saidi. "Design and Experimental Evaluation of a Novel Type Radar Reflector for use in the Marine Environment." In International Conference on Marine Engineering and Technology Oman. IMarEST, 2019. http://dx.doi.org/10.24868/icmet.oman.2019.033.

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The octahedral radar reflector is the one most commonly used today in marine applications, for purposes of increasing the Radar Cross Section (RCS) of small vessels at sea. The use of radar reflectors provides greater radar detection distances, therefore contributes to navigation safety. The octahedral reflector has proven to be relatively inefficient, since its RCS values do not remain fairly constant, but show significant variations resulting to changes of the angle of incidence. RCS variations in certain angles of incidence produce nulls, where the radar detection range is almost zero, thus

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10

Ackerman, D. A., M. I. Dahbura, Y. Shani, et al. "Compact hybrid resonant-optical reflector lasers with very narrow linewidths." In Integrated Photonics Research. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/ipr.1990.wd3.

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Lasers with submegahertz linewidths have importance in various applications, such as in coherent optical communications, interferometric sensors, and resonant-optical gyroscopes. For several years our laboratory has investigated a hybrid Bragg reflector laser with typical linewidths of less than 1 MHz and a narrowest linewidth of 100 kHz. The narrow line results from operating the laser at the steeply rising edge of the Bragg reflection. Understanding this mechanism led to the development1 of resonant-optical reflectors (RORs), integrated-optical elements capable of providing feedback with a r

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Informes sobre el tema "Reflector"

1

J. Nash, V. Munne, and LL Stimely. Space Reflector Materials for Prometheus Application. Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/883662.

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2

Moon, Brandon. ECAR-6589 Reflector Support Structure Analysis. Office of Scientific and Technical Information (OSTI), 2023. http://dx.doi.org/10.2172/2386921.

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McCamy, James W., Kwaku Koram, and Brian F. Kornish. Next Generation Reflector - Phase 1 Final Report. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1080364.

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4

RK Huang, CA Wang, MK Connors, GW Turner, and M Dashiell. Hybrid Back Surface Reflector GaInAsSb Thermophotovoltaic Devices. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/836454.

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5

Author, Not Given. Point-focus concentrator reflector assembly: Phase 1. Office of Scientific and Technical Information (OSTI), 1987. http://dx.doi.org/10.2172/5691864.

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6

Meyer, Robert B. Development of a Liquid Crystal Smart Reflector. Defense Technical Information Center, 1996. http://dx.doi.org/10.21236/ada308782.

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Hill, David A. Out-of-band response of reflector antennas. National Bureau of Standards, 1985. http://dx.doi.org/10.6028/nbs.ir.85-3021.

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8

Azad, Abul Kalam, Shobhita Kramadhati, Sinhara Rishi Malinda Silva, Nicholas Steven Sirica, and Houtong Chen. Flat Ultrathin Metasurface Parabolic Reflector for THz Applications. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1493535.

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9

J. Nash. Reflector and Shield Material Properties for Project Prometheus. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/883658.

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10

Doerry, Armin. Beam spoiling a reflector antenna with conducting shim. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1088051.

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