Results 321 to 330 of about 7,981,538 (380)
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Angular radiation pattern of Smith-Purcell radiation
Journal of the Optical Society of America B, 1984The power radiation pattern of Smith–Purcell radiation is measured at various latitudes and azimuth angles relative to the electron beam. The experimental data are used to evaluate the various models and the physical mechanisms previously suggested to describe Smith–Purcell radiation.
A. Gover, P. Dvorkis, U. Elisha
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Radiation patterns of arbitrarily oriented radiating elements
1995 International Conference on Electromagnetic Interference and Compatibility (INCEMIC), 2002The radiation patterns of horizontal and vertical dipoles have been reported in the literature. These results are used in the analysis and design of arrays of parallel vertical elements and collinear elements. However no information is available for the arbitrarily oriented elements. The element patterns of such elements are derived from the concept of
P. Manju Latha +5 more
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IEEE Transactions on Antennas and Propagation, 2019
This paper presents a novel high-gain endfire slot antenna array fed by air-substrate microstrip line. It has a simple and compact structure consisting of a copper strip and two copper sheets.
Yuefeng Hou +3 more
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This paper presents a novel high-gain endfire slot antenna array fed by air-substrate microstrip line. It has a simple and compact structure consisting of a copper strip and two copper sheets.
Yuefeng Hou +3 more
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ACOUSTIC RADIATION PATTERN ADJUSTING
The Journal of the Acoustical Society of America, 2013A loudspeaker having an omnidirectional radiation pattern at high frequencies. The loudspeaker includes an acoustic device that includes an acoustic enclosure; an acoustic driver, mounted in the acoustic enclosure; and a sheet of compliant material with a aperture therethrough, mounted in the enclosure, between the acoustic driver and the environment.
Geoffrey C. Chick, Dewey L. Potter
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IEEE Antennas and Wireless Propagation Letters, 2019
In this letter, a geometrically simple, reflector-backed single-point-fed circularly polarized (CP) antenna with unidirectional radiation pattern is presented.
Ubaid Ullah, S. Koziel, I. Mabrouk
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In this letter, a geometrically simple, reflector-backed single-point-fed circularly polarized (CP) antenna with unidirectional radiation pattern is presented.
Ubaid Ullah, S. Koziel, I. Mabrouk
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Antenna Radiation Pattern Measurement in a Nonanechoic Chamber
IEEE Antennas and Wireless Propagation Letters, 2019Several techniques are being studied with the objective of recovering the real antenna radiation patterns through measurements performed in nonanechoic environments.
S. M. Fróes +4 more
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IEEE Transactions on Antennas and Propagation, 2023
A pattern-reconfigurable antenna with three switchable radiation patterns is investigated. It consists of a three-layer cylindrical dielectric resonator antenna (DRA) and a parasitic monopole antenna.
Xiyao Liu, K. Leung, Nan Yang
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A pattern-reconfigurable antenna with three switchable radiation patterns is investigated. It consists of a three-layer cylindrical dielectric resonator antenna (DRA) and a parasitic monopole antenna.
Xiyao Liu, K. Leung, Nan Yang
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Sharp cutoff radiation patterns
IEEE Transactions on Antennas and Propagation, 1979A method is described for estimating the available slope (dB/ deg) for the design of a sharp cutoff radiation pattern with a given aperture size, sidelobe level, and ripple factor. Curves are presented which relate slope factor (dB/deg/wavelength of aperture), sidelobe level, and ripple factor.
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Transducer radiation pattern modification
The Journal of the Acoustical Society of America, 1975Ultrasonic transducers were used to simulate radiation patterns of an electromagnetic cavity-backed slot antenna when mounted on a flat ground plane as well as by itself in free space. A 12-in. spherical transducer excited in radial mode was selected to provide essentially isotropic coverage generated by the antenna.
H. S. Hayre, M. S. Putcha
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