Results 11 to 20 of about 1,607 (205)

A High-Gain Omnidirectional Broadband Antenna

open access: yesInternational Journal of Antennas and Propagation
This study develops a two-element biconical deformed printed dipole omnidirectional antenna comprising a radiating arm, a feed line, and a magnetic ring.
Junjun Wu
doaj   +2 more sources

The effects of PO43- removal from aqueous solution with varied concentrations of metal oxides in steel slag filter system [PDF]

open access: yes, 2018
High amount of orthophosphate will accelerate the growth of autotrophs and eutrophication will occur. This phenomenon decreases the water quality and as a result may increase the cost of water treatment for drinking water.
Ahmad, Siti Zu Nurain   +2 more
core   +1 more source

Millimeter-Wave Propagation Measurement and Modeling in Indoor Corridor and Stairwell at 26 and 38 GHz

open access: yesIEEE Access, 2021
Accurate propagation characteristics are essential for future indoor millimeter-wave (mmWave) small cell network planning. This paper presents propagation measurements at 26 GHz and 38 GHz which are important candidate bands for fifth generation mmWave ...
Yuyan Shen   +4 more
doaj   +1 more source

Reduction of the model noise in non-linear reconstruction via an efficient calculation of the incident field: application to a 434 MHz Scanner [PDF]

open access: yes, 1999
Microwave tomography has been drastically boosted by the development of efficient reconstruction algorithms based on an iterative solution of the corresponding non-linear inverse problem.
Bolomey, Jean Charles   +7 more
core   +1 more source

Formulating layered adjustable autonomy for unmanned aerial vehicles [PDF]

open access: yes, 2017
Purpose - In this paper, we propose a Layered Adjustable Autonomy (LAA) as a dynamically adjustable autonomy model for a multi-agent system. It is mainly used to efficiently manage humans and agents share control of autonomous systems and maintain humans’
A Mostafa, Salama   +3 more
core   +1 more source

On the Design of Conical Antennas for Broadband Impedance Matching Performance

open access: yesInternational Journal of Antennas and Propagation, 2017
In the scope of broadband radiators, the biconical antenna, or its monopole conical counterpart, is long known to be a proper choice. One common form of such radiator, the spherically capped conical antenna (SCCA), has closed-form solution to its input ...
Francisco Estêvão Simão Pereira   +1 more
doaj   +1 more source

Theoretical Investigations on CPW-Fed Single and Dual-Polarized Slot Radiators Using Schelkunoff’s Biconical Antenna Analysis [PDF]

open access: yesRadioengineering, 2020
This article presents a closed-form analysis of CPW-fed slot dipole structures with the help of Schelkunoff’s biconical antenna analysis technique and Babinet’s principle. Input characteristics of CPW-fed slot dipole antennas are investigated, and closed-
A. Banerjee   +4 more
doaj  

3D-Printed UHF-RFID Tag for Embedded Applications

open access: yesIEEE Access, 2020
This paper presents the design, manufacture and characterization of a novel 3D passive UHF-RFID tag for embedded applications. The prototype is fabricated using additive manufacturing techniques: 3D printing and copper electroplating.
Neus Vidal   +6 more
doaj   +1 more source

Design of Compact Broadband Omni directional Canonical Sleeve Antenna covering 500-3600 MHz

open access: yesAdvanced Electromagnetics, 2018
A novel compact broadband Canonical Sleeve Antenna (CSA) covering 500-3600 MHz with omni directional characteristics is presented in this paper. A new method is employed in which the radiating antenna structure is designed as combination of three ...
C. S. Ram, D. Vakula, M. Chakravarthy
doaj   +1 more source

Lightning radiation field due to channel tortuosity and branching [PDF]

open access: yes, 1997
The effect of lightning channel branching on the temporal waveform of the radiated fields of the return stroke is modeled.
Canavero, Flavio   +2 more
core   +1 more source

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