Academic literature on the topic 'Collinear array'

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Journal articles on the topic "Collinear array"

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Thomas, K. George, and N. Lenin. "Collinear printed array antenna." Microwave and Optical Technology Letters 50, no. 6 (2008): 1582–84. http://dx.doi.org/10.1002/mop.23423.

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McDonald, James L., and Dejan S. Filipovic. "A Monocone-Bicone Collinear Array." IEEE Transactions on Antennas and Propagation 58, no. 12 (2010): 3905–12. http://dx.doi.org/10.1109/tap.2010.2078454.

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Basu, Banani. "Synthesis of nonuniformly spaced linear array of parallel and collinear dipole with minimum standing wave ratio using evolutionary optimization techniques." International Journal of Microwave and Wireless Technologies 3, no. 4 (2011): 431–38. http://dx.doi.org/10.1017/s1759078711000560.

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In this paper, the author proposes a method based on two recent evolutionary algorithms (EAS): particle swarm optimization (PSO) and differential evolution (DE) to design nonuniformly placed linear arrays of half-wavelength long dipoles. The objective of the work is to generate pencil beam in horizontal (for parallel array) and vertical (for collinear array) plane with minimum standing wave ratio (SWR) and fixed side lobe level (SLL). Dynamic range ratio (DRR) of current amplitude distribution is kept at a fixed value. Two different examples have been presented having different array alignments. For both the configurations parallel and collinear, the excitation distribution and geometry of individual array elements are perturbed to accomplish the designing goal. Coupling effect between the elements is analyzed using induced electromotive force (EMF) method and minimized in terms of SWR. Numerical results obtained from both the algorithms are statistically compared to present a comprehensive overview. Beside this, the article also efficiently computes the trade-off curves between SLL, beam width, and number of array elements for nonuniformly spaced parallel array. It featured the average element spacing versus SWR curve for nonuniformly separated arrays. Furthermore, minimum achievable SLL performances of uniformly and nonuniformly spaced parallel arrays are compared for same average spacing in the proposed work.
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Sierra-Perez, M., F. L. Heras-Andres, and J. A. G. de Lope. "Low-cost printed collinear array antenna." IEEE Antennas and Propagation Magazine 43, no. 5 (2001): 23–30. http://dx.doi.org/10.1109/74.979364.

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Zarifi, Davoud, and Ali Ahmadi. "AN OMNIDIRECTIONAL PRINTED COLLINEAR MICROSTRIP ANTENNA ARRAY." Progress In Electromagnetics Research Letters 75 (2018): 33–38. http://dx.doi.org/10.2528/pierl18022504.

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Barker, R. D. "Depth of investigation of collinear symmetrical four‐electrode arrays." GEOPHYSICS 54, no. 8 (1989): 1031–37. http://dx.doi.org/10.1190/1.1442728.

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A study of collinear symmetrical four‐electrode arrays and their tripotential variations indicates the existence of an electrode array for which all the tripotential arrangements have the same depth of investigation. Examination of computer‐generated sounding curves confirms this result only when depth of investigation is defined as the median of the depth of investigation characteristic curve. The results lend support to this being the most practically useful definition of depth of investigation.
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C, Subba Rao, Madhavi Devi L, and Swati Lakshmi B. "Design and Analysis of Collinear Biconical Antenna Array." International Journal of Engineering Trends and Technology 69, no. 3 (2021): 147–53. http://dx.doi.org/10.14445/22315381/ijett-v69i3p223.

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AWAI, K. "Experimental Study on Compensation of Array Element Pattern of Collinear Dipole Array Sensor." IEICE Transactions on Communications E88-B, no. 8 (2005): 3314–16. http://dx.doi.org/10.1093/ietcom/e88-b.8.3314.

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Daly, R. A., W. S. T. Rowe, and K. Ghorbani. "Zero tilt omnidirectional collinear array antenna with coplanar feed." Electronics Letters 47, no. 6 (2011): 359. http://dx.doi.org/10.1049/el.2010.3617.

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Uwano, Shuta, Atsuya Ando, Tomohiro Seki, Yasushi Takatori, and Takefumi Hiraguri. "Experimental Investigations of Cochannel Interference Reduction Effect at High Elevation Base Station Using Beam Tilt and Orthogonal Polarization." International Journal of Antennas and Propagation 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/532743.

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This paper addresses the problem of cochannel interference (CCI) generated in a mixed cell architecture in microcellular systems. In this type of microcellular systems in which both microcells and macrocells coexist in the same geographical urban area, the base station antennas mounted on the rooftops of buildings to cover wide circular radio zones suffer severe CCI from the surrounding low base stations. A dielectric-loaded slotted-cylinder antenna (DSCA) is applied to horizontally polarized omnidirectional array antennas in a height-diversity configuration with the high gain of 8 dBi, which is comparable to that of a collinear antenna, to reduce the CCI. The measurements conducted in a suburban area clarify the reduction in the CCI for three techniques. The beam-tilt technique reduces the CCI level by approximately 10 dB for both collinear antennas and the DSCA array antennas. The use of horizontal polarization reduces the CCI level by approximately 13 dB for the DSCA array antennas with and without beam tilt. The combination of the beam tilt and horizontal polarization or the DSCA array antennas with beam tilt significantly reduces the CCI level by approximately 23 dB.
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Dissertations / Theses on the topic "Collinear array"

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Caland, Fabrice. "Décomposition tensorielle de signaux luminescents émis par des biosenseurs bactériens pour l'identification de Systèmes Métaux-Bactéries." Phd thesis, Université de Lorraine, 2013. http://tel.archives-ouvertes.fr/tel-00934507.

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La disponibilité et la persistance à l'échelle locale des métaux lourds pourraient être critiques notamment pour l'usage futur des zones agricoles ou urbaines, au droit desquelles de nombreux sites industriels se sont installés dans le passé. La gestion de ces situations environnementales complexes nécessitent le développement de nouvelles méthodes d'analyse peu invasives (capteurs environnementaux), comme celles utilisant des biosenseurs bactériens, afin d'identifier et d'évaluer directement l'effet biologique et la disponibilité chimique des métaux. Ainsi dans ce travail de thèse, nous avons cherché à identifier, à l'aide d'outils mathématiques de l'algèbre multi-linéaire, les réponses de senseurs bactériens fluorescents dans des conditions environnementales variées, qu'il s'agisse d'un stress engendré par la présence à forte dose d'un métal ou d'une carence nutritive engendrée par son absence. Cette identification est fondée sur l'analyse quantitative à l'échelle d'une population bactérienne de signaux multidimensionnels. Elle repose en particulier sur (i) l'acquisition de données spectrales (fluorescence) multivariées sur des suspensions de biosenseurs multicolores interagissant avec des métaux et sur (ii) le développement d'algorithme de décomposition tensoriels. Les méthodes proposées, développées et utilisées dans ce travail s'efforcent d'identifier " sans \textsl{a priori} " (\textsl{a minima}), la réponse fonctionnelle de biosenseurs sous différentes conditions environnementales, par des méthodes de décomposition de tenseurs sous \hyphenation{con-train-tes} des signaux spectraux observables. Elles tirent parti de la variabilité des réponses systémiques et permettent de déterminer les " sources " élémentaires identifiant le système et leur comportement en fonction des paramètres extérieurs. Elles sont inspirées des méthodes CP et PARALIND . L'avantage de ce type d'approche, par rapport aux approches classiques, est l'identification unique des réponses des biosenseurs sous de faibles contraintes. Le travail a consisté à développer des algorithmes efficaces de séparations de sources pour les signaux fluorescents émis par des senseurs bactériens, garantissant la séparabilité des sources fluorescentes et l'unicité de la décomposition. Le point original de la thèse est la prise en compte des contraintes liées à la physique des phénomènes analysés telles que (i) la parcimonie des coefficients de mélange ou la positivité des signaux "source", afin de réduire au maximum l'usage d'a priori ou (ii) la détermination non empirique de l'ordre de la décomposition (nombre de sources). Cette posture a permis aussi d'améliorer l'identification en optimisant les mesures physiques par l'utilisation de spectres synchrones ou en apportant une diversité suffisante aux plans d'expériences. L'usage des spectres synchrones s'est avéré déterminant à la fois pour améliorer la séparation des sources de fluorescence, mais aussi pour augmenter le rapport signal sur bruit des biosenseurs les plus faibles. Cette méthode d'analyse spectrale originale permet d'élargir fortement la gamme chromatique des biosenseurs fluorescents multicolores utilisables simultanément. Enfin, une nouvelle méthode d'estimation de la concentration de polluants métalliques présents dans un échantillon à partir de la réponse spectrale d'un mélange de biosenseurs non-spécifiques a été développée.
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Book chapters on the topic "Collinear array"

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Mikata, Y., and J. D. Achenbach. "Scattering by a Periodic Array of Collinear Cracks." In Review of Progress in Quantitative Nondestructive Evaluation. Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0817-1_11.

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Pani, Shuchismita, Arun Kumar, and Malay Ranjan Tripathy. "Performance Analysis of Collinear Beam-Steering Array Antenna." In Lecture Notes in Electrical Engineering. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4765-7_60.

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Ishii, Osamu, Keiichiro Itoh, Yoshihiro Kimachi, and Kenichi Kagoshima. "Superconducting Collinear Array Antennas with a Shaped Radiation Pattern." In Advances in Superconductivity V. Springer Japan, 1993. http://dx.doi.org/10.1007/978-4-431-68305-6_251.

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Oviedo-Tolentino, F., R. Romero-Méndez, F. G. Pérez-Gutiérrez, G. Gutiérrez-Urueta, and H. Méndez-Azúa. "Effect of the Inlet Flow Angle on the Vortex Induced Vibration of a Collinear Array of Flexible Cylinders." In Experimental and Computational Fluid Mechanics. Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00116-6_25.

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"Antenna for ADS-B Signals." In Recent Advances in Satellite Aeronautical Communications Modeling. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8214-4.ch005.

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This chapter deals with calculations of the microstrip antenna and the linear phased array that were based on the method of moments using Antenna Magus software. The analysis of the characteristics of these antennas at different emitter numbers and different types of the amplitude distribution was carried out. Calculations of electric field intensity and directional patterns for collinear antennas were provided. The method of moments in the framework of two program complexes was used. Comparison has shown high level of results coincidence. The sample of the antenna is described, which is used in operating system for reception of ADS-B signals from airborne transponders.
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Conference papers on the topic "Collinear array"

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Fenn, Alan J., and Cara Yang Kataria. "Adaptive Omnidirectional Collinear Array of Bicones." In 2024 IEEE International Symposium on Phased Array Systems and Technology (ARRAY). IEEE, 2024. https://doi.org/10.1109/array58370.2024.10880443.

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Tanaka, Yuki, Hikaru Hamase, and Hiroyuki Tani. "Flexible and Scalable Collinear Rectenna Array for IoT Applications." In 2025 IEEE Wireless Power Technology Conference and Expo (WPTCE). IEEE, 2025. https://doi.org/10.1109/wptce62521.2025.11062094.

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Liu, Yaqi, Yaxin Li, and Di Wu. "Suppressing Zenith Directional Radiation Using Collinear Array for STAR Antennas." In 2024 IEEE 12th Asia-Pacific Conference on Antennas and Propagation (APCAP). IEEE, 2024. https://doi.org/10.1109/apcap62011.2024.10881653.

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Arumugam, Ram Kishore, André Froehly, Patrick Wallrath, Reinhold Herschel, and Nils Pohl. "Matrix Pencil Based Estimation of Parameters in 2D for Non-collinear Uniform Linear Arrays." In 2024 21st European Radar Conference (EuRAD). IEEE, 2024. http://dx.doi.org/10.23919/eurad61604.2024.10734880.

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Qing Wei Pan. "Coplanar waveguide collinear array multiband PCB antenna." In 2012 IEEE Symposium on Wireless Technology & Applications (ISWTA). IEEE, 2012. http://dx.doi.org/10.1109/iswta.2012.6373841.

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Peng-Fei Zhao, Xin Lv, Li-Ming Si, and Yong Liu. "A novel omnidirectional microstrip coaxial collinear antenna array." In IET International Radar Conference 2013. Institution of Engineering and Technology, 2013. http://dx.doi.org/10.1049/cp.2013.0438.

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Jin, Guiping, Li Huang, and Shaowei Liao. "Monopulse Substrate Integrated Waveguide Collinear Slot Antenna Array." In 2022 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP). IEEE, 2022. http://dx.doi.org/10.1109/imws-amp54652.2022.10107004.

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Uesaka, Takashi, and Hiroyuki Arai. "Design of cosecant squared beam collinear array using genetic algorithm." In 2013 IEEE International Workshop on Electromagnetics; Applications and Student Innovation (iWEM). IEEE, 2013. http://dx.doi.org/10.1109/iwem.2013.6888774.

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Wang, Qiang, Xiao-Lin Yang, Yan-Tao Li, Zhao-Bo Li, and Si-Tao Chen. "Design of a high gain and low sidelobe coaxial collinear antenna array." In 2011 International Conference on Computational Problem-Solving (ICCP). IEEE, 2011. http://dx.doi.org/10.1109/iccps.2011.6092208.

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Azhagu Sadhanaa K. and Kashwan K. R. "Design and implementation of printed strip collinear dipole array antenna for C band." In 2016 International Conference on Computation of Power, Energy Information and Commuincation (ICCPEIC). IEEE, 2016. http://dx.doi.org/10.1109/iccpeic.2016.7557226.

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