Results 11 to 20 of about 27,838 (269)

Characteristics of the Sleeve Dipole Antenna Used for EMC Applications

open access: yesIEEE Access, 2020
This paper presents the antenna factor (AF) of sleeve dipole antennas (SDA) with coaxial-cable balun for electromagnetic compatibility (EMC) applications.
Ki-Chai Kim   +2 more
doaj   +1 more source

Calibration Proposal for UHF Partial Discharge Measurements at Power Transformers

open access: yesEnergies, 2019
The continuous, non-intermitted service of electrical grids relies on the reliability of their assets, e.g., power transformers. Local insulation defects can result in serve failures such as breakdowns with severe subsequent costs. The prevention of such
Martin Siegel   +10 more
doaj   +1 more source

A Compact, Bistatic Antenna System with Very High Interport Isolation for 2.4 GHz In-Band Full Duplex Applications

open access: yesInternational Journal of Antennas and Propagation, 2021
This paper presents a compact, dual polarized bistatic (two closely spaced transmit and receive radiators) patch antenna with excellent interport isolation performance.
Haq Nawaz   +3 more
doaj   +1 more source

Q-Factor Bounds for Microstrip Patch Antennas [PDF]

open access: yesIEEE Transactions on Antennas and Propagation, 2023
Antenna bounds are a useful tool in assessing the feasibility or performance of an antenna design. Microstrip patch antennas are often limited by their relatively narrow bandwidth, and therefore Q-factor is an important design parameter, as it is related to the inverse of the fractional bandwidth.
Ben A. P. Nel   +2 more
openaire   +1 more source

Ultra-low profile solar-cell-integrated antenna with a high form factor

open access: yesScientific Reports, 2021
This paper presents an ultra-low-profile copper indium gallium selenide (CIGS) based solar cell integrated antenna with a high form factor. A tiny slot was etched from the solar cell to develop an ultra-low-profile solar-cell-integrated antenna.
Ahmed Ali   +4 more
doaj   +1 more source

Validation of Compact-Standard Antenna Method for Antenna Calibration above 1 GHz [PDF]

open access: yesJournal 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

Measurement of HF monopole antenna array ground wave gain, antenna factor, and antenna noise factor [PDF]

open access: yes2001 IEEE EMC International Symposium. Symposium Record. International Symposium on Electromagnetic Compatibility (Cat. No.01CH37161), 2002
This paper presents a practical way to measure the ground wave gain G/sub GW/, ground wave antenna factor AF/sub GW/, and antenna noise factor F/sub a/(Mon) of monopoles used in BF antenna arrays. It shows measurement results taken from June 1997 to September 1999 at five geographically separated HIT arrays.
openaire   +2 more sources

Antenna factorization of gauge-theory amplitudes [PDF]

open access: yesPhysical 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.
openaire   +2 more sources

Analysis of Horn Antennas in Receiving Mode as an EM Field Sensor

open access: yesInternational 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
doaj   +1 more source

Research on energy efficiency of massive MIMO system based on maximum ratio transmission precoding antenna grouping technology

open access: yes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
doaj   +1 more source

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