Results 291 to 300 of about 68,865 (333)
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Directivity of omnidirectional antennas
IEEE Antennas and Propagation Magazine, 1993A graph describing the directivity of an omnidirectional antenna versus the half-power elevation-plane beamwidth is presented. This data has been calculated assuming a sin/sup n/ theta elevation-plane pattern. A closed-form curve-fitted approximation for this relationship is also presented. >
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DNA-Directed Artificial Light-Harvesting Antenna
Journal of the American Chemical Society, 2011Designing and constructing multichromophoric, artificial light-harvesting antennas with controlled interchromophore distances, orientations, and defined donor-acceptor ratios to facilitate efficient unidirectional energy transfer is extremely challenging.
Palash K, Dutta +5 more
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2016 XXIst International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED), 2016
The analytical expressions are obtained, and the method of calculating directional patterns of thin antennas with large dimensions was proposed. Directivity of dipoles, V-dipoles and in-phase radiators of similar types were calculated. The importance of accounting the magnitude PF for the estimate of a communication range was demonstrated.
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The analytical expressions are obtained, and the method of calculating directional patterns of thin antennas with large dimensions was proposed. Directivity of dipoles, V-dipoles and in-phase radiators of similar types were calculated. The importance of accounting the magnitude PF for the estimate of a communication range was demonstrated.
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Antenna array directional patterns
IEEE Transactions on Antennas and Propagation, 1974The author describes a computer system to map or draw graphs, on a line printer, of the responses of arrays as a function of incident angle.
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The wave antenna: A new type of highly directive antenna
Journal of the American Institute of Electrical Engineers, 1923Review of the Subject. — A small bungalow in a grove of oak trees just outside of Riverhead, Long Island, with a line of poles along a country road, carrying two copper wires, and ending by a stream nine miles southwest of Riverhead, — this in brief describes the Atlantic coast “ear” of the Radio Corporation of America, where the wireless messages from
Harold H. Beverage +2 more
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The directional coupler antenna
IRE International Convention Record, 2005The combination of four broadband 3 db directional couplers and four radiating elements into an antenna for direction-finding purposes has been investigated. Under theoretical conditions, two overlapping beams with constant crossover level and variable crossover slope over an infinite frequency band can be obtained.
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Antenna Systems—Directive Aerials
IETE Journal of Education, 1963(1963). Antenna Systems—Directive Aerials. IETE Journal of Education: Vol. 4, No. 5, pp. 298-306.
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Conformal omni-directional antenna
2023 IEEE 11th Asia-Pacific Conference on Antennas and Propagation (APCAP), 2023Te Ma +3 more
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Cosmology with the Laser Interferometer Space Antenna
Living Reviews in Relativity, 2023Germano Nardini
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