Results 31 to 40 of about 58,226 (296)
Evaluation of 8-Channel Radiative Antenna Arrays for Human Head Imaging at 10.5 Tesla
Sensors, 2021 For human head magnetic resonance imaging at 10.5 tesla (T), we built an 8-channel transceiver dipole antenna array and evaluated the influence of coaxial feed cables.
Myung Kyun Woo +9 more
doaj +1 more source
Pseudo-Dipole Signal Removal from WMAP Data [PDF]
, 2010 It is discovered in our previous work that different observational systematics, e.g., errors of antenna pointing directions, asynchronous between the attitude and science data, can generate pseudo-dipole signal in full-sky maps of the cosmic microwave ...
B. F. Roukema +14 more
core +1 more source
DIPOLE ANTENNAS WITH A SECTOR-SHAPED RADIATION PATTERN [PDF]
Radio Physics and Radio AstronomySubject and Purpose. The directivity characteristics of a dipole antenna when it is placed above and parallel to a perfectly conducting screen of rectangular shape are considered, aiming to theoretically study dipole antennas with sector-shaped radiation
M. M. Gorobets +3 more
doaj +1 more source
IEEE Access, 2018 The miniaturization of a compact planar log-periodic dipole array (LPDA) antenna usually comes with a side effect of the gain deterioration phenomenon.
Geonyeong Shin +4 more
doaj +1 more source
Remote Sensing, 2023 As an effective active remote sensing technology for the exploration of shallow underground targets, ground-penetrating radar (GPR) is a detection method that can be used to obtain information about the characteristics of underground targets by ...
Haifeng Fan +4 more
doaj +1 more source
Circularly Polarized Receiving Antenna Incorporating Two Helices to Achieve Low Backscattering [PDF]
, 2012 We propose to use an antenna composed of two orthogonal helices as a low-scattering sensor. The vector effective length is derived for the antenna using the small dipole approximation for the helices.
Karilainen, Antti O. +1 more
core +1 more source
Decoupling of Dipole Antennas by a Split Loop
Journal of Physics: Conference Series, 2018 The decoupling of two very closely located resonant dipoles by a similar dipole located in the middle between them has been recently demonstrated. An approximate analytical model of this decoupling was built, validated by exact numerical simulations and confirmed experimentally.
Simovski, Constantin +3 more
openaire +2 more sources
PERFORMANCE ANALYSIS FOR DIRECTION-FINDING CIRCULAR ANTENNA ARRAY
Известия высших учебных заведений России: Радиоэлектроника, 2018 This paper considers circular antenna arrays comprised of symmetrical dipole radiators applied in communication, navigation and monitoring systems. Despite their widespread use, a number of significant issues is underinvestigated.
Svyatoslav V. Ballandovich +3 more
doaj +1 more source
Multi-slot optical Yagi-Uda antenna for efficient unidirectional radiation to free space
, 2013 Plasmonic nanoantennas are key elements in nanophotonics capable of directing radiation or enhancing the transition rate of a quantum emitter. Slot-type magnetic-dipole nanoantennas, which are complementary structures of typical electric-dipole-type ...
Cheon, Sangmo +13 more
core +2 more sources
Broadband circularly polarized antennas for UHF SATCOM [PDF]
, 2011 Novel circularly polarized (CP) antenna configurations derived from Moxon type antenna (bent dipole element over a ground plane) for broadband VHF SATCOM applications.
Manzhura, Oksana +3 more
core +1 more source