Results 21 to 30 of about 42,485 (301)

Wideband Linearly-Polarized and Circularly-Polarized Aperture-Coupled Magneto-Electric Dipole Antennas Fed by Microstrip Line With Electromagnetic Bandgap Surface

open access: yesIEEE Access, 2019
Wideband aperture-coupled magneto-electric (ME) dipole antennas fed by microstrip line are proposed in this paper. The aperture-coupled microstrip-line-fed method was utilized in the proposed configuration to replace the conventional Γ-shaped ...
Jie Sun, Kwai-Man Luk
doaj   +1 more source

Influence of the Mesh Size on the Computation of the Close Near Fields of Dipole Antennas

open access: yesIEEE Open Journal of Antennas and Propagation, 2022
While evaluating the near field of dipole antennas, it is noted that different software suites yield values of the electric and the magnetic fields, at the surface of antennas, that can be substantially different, especially at the tips and at the feed ...
Alessandra Paffi   +2 more
doaj   +1 more source

Near-field optical power transmission of dipole nano-antennas [PDF]

open access: yes, 2009
Nano-antennas in functional plasmonic applications require high near-field optical power transmission. In this study, a model is developed to compute the near-field optical power transmission in the vicinity of a nano-antenna. To increase the near-field
A. Hartschuh   +36 more
core   +1 more source

Performance Investigations of Quasi-Yagi Loop and Dipole Antennas on Silicon Substrate for 94 GHz Applications

open access: yesInternational Journal of Antennas and Propagation, 2014
This paper introduces the design and implementation of two high gain Quasi-Yagi printed antennas developed on silicon substrate for 94 GHz imaging applications.
Osama M. Haraz   +4 more
doaj   +1 more source

Glacier bed surveying with helicopter-borne dual-polarization ground-penetrating radar

open access: yesJournal of Glaciology, 2019
Traditionally, helicopter-borne ground-penetrating radar (GPR) systems are operated with a single pair of bistatic dipole antennas to measure the thickness of glaciers.
LISBETH LANGHAMMER   +6 more
doaj   +1 more source

New Analysis and Design Techniques for Arbitrary Reactance Trap Dipoles

open access: yesIEEE Open Journal of Antennas and Propagation, 2023
The work presents a significantly revised analysis of a classic resonator loaded antenna– the trap dipole. The authors demonstrate in calculation, simulation, and measurement that trap dipoles antennas are not matched or resonant at the same ...
Paul R. Winniford   +3 more
doaj   +1 more source

Substrate Optimization for Integrated Circuit Antennas [PDF]

open access: yes, 1982
The reciprocity theorem and integral equation techniques are employed to determine the properties of integrated-circuit antennas. The effect of surface waves is considered for dipole and slot elements on substrates.
Alexopoulos, Nicolaos G.   +2 more
core   +2 more sources

Textile Diamond Dipole and Artificial Magnetic Conductor Performance under Bending, Wetness and Specific Absorption Rate Measurements [PDF]

open access: yes, 2015
Textile diamond dipole and Artificial Magnetic Conductor (AMC) have been proposed and tested under wearable and body centric measurements. The proposed antenna and AMC sheet are entirely made of textiles for both the substrate and conducting parts, thus ...
Abd Malek, M. F.   +5 more
core   +2 more sources

Unidirectional dipole antenna

open access: yesElectronics Letters, 1972
A new small unidirectional wire antenna, useful for an indoor television receiving antenna, has been developed for use in the v.h.f. band. This antenna consists of two closely spaced dipoles. This letter describes the principle involved and introduces the equations for input impedance and gain.
Y. Mikuni, K. Nagai
openaire   +1 more source

A practical theorem on using interferometry to measure the global 21-cm signal [PDF]

open access: yes, 2016
The sky-averaged, or global, background of redshifted $21$ cm radiation is expected to be a rich source of information on cosmological reheating and reionizaton.
Chang, Tzu-Ching   +3 more
core   +3 more sources

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