Results 1 to 10 of about 208,096 (201)

An Optimization Design of Bi-log Hybrid Antenna with Taguchi’s Method for EMI Measurements

open access: yesApplied Sciences, 2023
This paper presents a comprehensive design approach for a biconical log-periodic dipole array (Bi-log) hybrid antenna optimized specifically for electromagnetic interference (EMI) measurements.
Chih-Hung Lee, Ding-Bing Lin
doaj   +1 more source

Investigation of Broadband Printed Biconical Antenna with Tapered Balun for EMC Measurements

open access: yesEnergies, 2021
This article investigates the design, modeling, and fabrication of small-size (150 × 90 × 1.6 mm) broadband printed biconical antenna. The proposed antenna is intended for use a reference antenna for electromagnetic interference measurement inside the ...
Abdulghafor A. Abdulhameed   +1 more
doaj   +1 more source

ANTENNAS WITH CONTROLLED DIRECTIVITY PATTERNS [PDF]

open access: yesРадиофизика и электроника, 2017
The current methods and devices for correcting and controlling the directivity patterns of metal whip and loop reconfigurable antennas, as well as plasma and electron beam reconfigurable antennas are investigated.
V. V. Ovsyanikov
doaj   +1 more source

New Design Approach of “3rd - Order Dipole Antenn” Based on Direct Coupled Resonator Bandpass Filter

open access: yesJournal of Applied Science and Engineering, 2021
An ultra-wideband (UWB) antennas used with the applications of wireless communication systems (WCS), the following five antenna parameters; radiation patterns, directivity, bandwidth, efficiency, and antenna gain should be well optimized.
Alaa K. Al-azzawi
doaj   +1 more source

Efficient spontaneous emission by metal-dielectric antennas; antenna Purcell factor explained

open access: yesOptics Express, 2021
The rate of spontaneous emission from an optical emitter can be greatly enhanced using a metallic optical antenna at the penalty of efficiency. In this paper we propose a metal-dielectric antenna that eliminates the tradeoff between spontaneous emission enhancement and radiative efficiency by using nanoscopic dielectric structures at the antenna tips ...
Sean Hooten   +3 more
openaire   +2 more sources

Miniaturized Self‐Resonant Micro Coil Array with A Floating Structure for Wireless Multi‐Channel Transmission

open access: yesAdvanced Science, 2021
Micro size antennas have significant merits due to the small size effect, enabling new device concepts. However, the low‐quality factor (Q‐factor), the large size of impedance matching components, and the poor selectivity of the multi‐array design remain
Byoung Ok Jun   +9 more
doaj   +1 more source

Results of an intercomparison for free space antenna factor measurements within the German Calibration Service (DKD) [PDF]

open access: yesAdvances in Radio Science, 2016
In this paper we discuss the results of an intercomparison for free space antenna factor measurements performed within the German Calibration Service (DKD).
T. Kleine-Ostmann   +10 more
doaj   +1 more source

Bandwidth-Constrained Capacity Bounds and Degrees of Freedom for MIMO Antennas

open access: yes, 2021
The optimal spectral efficiency and number of independent channels for MIMO antennas in isotropic multipath channels are investigated when bandwidth requirements are placed on the antenna. By posing the problem as a convex optimization problem restricted
Capek, Miloslav   +2 more
core   +1 more source

Sidelobe Reductions of Antenna Arrays via an Improved Chicken Swarm Optimization Approach

open access: yesIEEE Access, 2020
Antenna arrays are able to improve the directivity performance and reduce the cost of wireless communication systems. However, how to reduce the maximum sidelobe level (SLL) of the beam pattern is a key problem in antenna arrays.
Shuang Liang   +5 more
doaj   +1 more source

Foldable all-textile cavity-backed slot antennas for personal UWB localization [PDF]

open access: yes, 2020
An all-textile multimoded cavity-backed slot antenna has been designed and fabricated for body-worn impulse radio ultra-wideband (IR-UWB) operation in the 3,744-4,742.4 MHz frequency band, thereby covering Channels 2 and 3 of the IEEE 802.15.4a standard.
Lemey, Sam   +4 more
core   +1 more source

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