Results 211 to 220 of about 8,535 (268)
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Antenna Radiation Pattern Compressive Sensing
MILCOM 2018 - 2018 IEEE Military Communications Conference (MILCOM), 2018Modern wireless communications is placing ever greater demands on the system's antenna. But high-resolution, wide-band antenna pattern measurement remains a slow, expensive process that can hinder research, development, and production. This paper explores the use of compressive sensing to accelerate the measurement process.
Michael L. Don, Gonzalo R. Arce
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Radiation Pattern Antenna System Measurement
2021 13th International Conference on Measurement, 2021The article deals with measuring the radiation characteristics of the antenna system in conditions of very high electromagnetic fields and the presence of other interfering signals.
Michal Dzuris +3 more
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Radiation pattern synthesis for a prolate spheroidal antenna
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2017An antenna is designed consisting of axial surface currents on a prolate spheroidal metallic surface. The dual orthogonality of the prolate spheroidal wave functions is utilized to synthesize a far field radiation pattern which best approximates a desired far field pattern for a given arbitrary superdirective ratio.
Marco D Poort, Piergiorgio LE Uslenghi
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The Effect of Antenna Network Configurations on the Radiation Patterns
2019 International Conference on Internet of Things, Embedded Systems and Communications (IINTEC), 2019In this paper, we present different configurations of antenna networks for Worldwide Interoperability for Microwave Access (WiMAX) communication system. This phase consists in networking the elementary radiating elements in a particular geometric arrangement to guarantee the requirements imposed in terms of gain, maximum size and radiation patterns ...
Said Ghnimi +3 more
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A reconfigurable radiation pattern annular slot antenna
2016 Loughborough Antennas & Propagation Conference (LAPC), 2016This paper contemplate a theoretical analysis of a pattern reconfigurable antenna using annular slot antenna operating in low frequency. A shorting pin is inserted to allow the annular slot antenna to have an omni-directional radiation pattern like a monopole antenna.
Aziz, NA, Radhi, A, Nilavalan, R
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Calculating antenna radiation patterns
Electrical Engineering, 1944CALCULATIONS of the horizontal relative field patterns of antennas are long and laborious and increase in complexity with the number of antenna elements employed. Present calculating machines are useful only for antenna-beam arrays consisting of not over three elements.
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The improvement technology of radiation pattern for GPS antenna
2014 International Symposium on Antennas and Propagation Conference Proceedings, 2014This paper shows a radiation pattern improvement method for GPS antenna. By adding 2 wavetraps into a mobile device at a specific location, the upper hemisphere efficiency (UHE) with wavetraps is improved from 26% to 46%. This technology does not increase any antenna area and antenna clearance. It represents the technology is useful for mobile antenna,
Shih-Huang, Yeh +2 more
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Simulation of antenna radiation pattern
Microwave and Optical Technology Letters, 1995AbstractAdequately modeling the radiation pattern of a high‐performance antenna system usually requires the expensive development of complicated electromagnetic software or the storage of an extremely large number of measured data. An alternative and efficient simulation technique is described in this article using a spherical wave expansion model ...
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Radiation pattern of cylindrical‐wraparound chirostrip antennas
Microwave and Optical Technology Letters, 1999In this paper, a cylindrical-wraparound microstrip antenna flush mounted to the upper surface of a chiral substrate is analyzed. The chiral substrate is wrap fabricated around a conducting core cylinder. Dyadic Green's functions for such a cylindrical structure are formulated in terms of cylindrical vector wave eigenfunctions.
Li, L.-W., Zhao, T.-X., Leong, M.-S.
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On the radiation pattern of a multibeam antenna
IEEE Transactions on Antennas and Propagation, 1976The optimum radiation of a lens antenna with an array feed of M elements is desired, which will exhibit maximum gain in a number ( k ) of specified directions and nulls in other ( j ) specified directions. This optimum is not derived; however, a condition for the optimum is shown to be some superposition of just ( k + j ) individual radiation patterns ...
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