Results 21 to 30 of about 209,142 (295)
Design of a Finger Ring Antenna for Wireless Sensor Networks [PDF]
, 2016 Body-centric communications have become very active area of research due to ever-growing demand of portability. Advanced applications such as; health monitoring, tele-medicine, identification systems, performance monitoring of athletes, defence systems ...
Abbassi, Qammer Hussain +4 more
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Validation of Compact-Standard Antenna Method for Antenna Calibration above 1 GHz [PDF]
Journal of the Korean Institute of Electromagnetic Engineering and Science, 2019 In this paper, we propose a compact-standard antenna method (C-SAM) for antenna calibration above 1 GHz. The test-site evaluation of the fully-anechoic room (FAR) condition satisfied the free-space conditions.
Min-Joo Jeong +4 more
doaj +1 more source
Antenna factorization in strongly ordered limits [PDF]
Physical Review D, 2005 When energies or angles of gluons emitted in a gauge-theory process are small and strongly ordered, the emission factorizes in a simple way to all orders in perturbation theory. I show how to unify the various strongly-ordered soft, mixed soft-collinear, and collinear limits using antenna factorization amplitudes, which are generalizations of the ...
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Antenna factorization of gauge-theory amplitudes [PDF]
Physical Review D, 1998 I derive a single factorization formula which summarizes all soft and collinear divergences of a tree-level gauge theory amplitude. The singular factor squared is in a certain sense the generalization of the Catani-Seymour dipole factorization formula.
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Highly efficient impulse-radio ultra-wideband cavity-backed slot antenna in stacked air-filled substrate integrated waveguide technology [PDF]
, 2018 An impulse-radio ultra-wideband (IR-UWB) cavity-backed slot antenna covering the [5.9803; 6.9989] GHz frequency band of the IEEE 802.15.4a-2011 standard is designed and implemented in an air-filled substrate integrated waveguide (AFSIW) technology for ...
Lemey, Sam +3 more
core +1 more source
Analysis of Horn Antennas in Receiving Mode as an EM Field Sensor
International Journal of Antennas and Propagation, 2012 Electromagnetic (EM) field measurement uses antenna in receiving mode as EM field sensor (EMFS). FDTD technique is applied to analyze the horn antenna in this mode.
Maifuz Ali, Seong-Ook Park
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上海师范大学学报. 自然科学版, 2021 In massive MIMO systems,the strong antenna correlation among large antenna arrays would lead to system performance degradation. In this paper a joint antenna grouping and antenna selection algorithm based on maximum ratio transmission precoding was ...
JI Xiaowei +3 more
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Factorization of Antenna Efficiency of Aperture-Type Antenna: Beam Coupling and Two Spillovers [PDF]
IEEE Transactions on Antennas and Propagation, 2021 Antenna efficiency is one of the most important figures-of-merit of a radio telescope for observations especially at millimeter wavelengths or shorter wavelengths, even for a multibeam radio telescope. To analyze a system with a beam waveguide, a lossless antenna consisting of two apertures in series is considered in the frame of the scalar wave ...
Makoto Nagai +2 more
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Antenna Array Diversity Evaluation Under Multipath Environments With Digital Beamforming
IEEE Open Journal of Antennas and Propagation, 2023 This work proposes a methodology for evaluating the antenna array diversity and resultant radiation pattern from digitally-processed-based beamforming systems.
Hugo Rodrigues Dias Filgueiras +3 more
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Directive Antenna for Ultrawideband Medical Imaging Systems
International Journal of Antennas and Propagation, 2008 A compact and directive ultrawideband antenna is presented in this paper. The antenna is in the form of an antipodal tapered slot with resistive layers to improve its directivity and to reduce its backward radiation.
Amin M. Abbosh
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