Results 71 to 80 of about 1,449,714 (389)
Measurements of antenna polar diagrams and efficiencies using a phase-switched interferometer [PDF]
, 1986 It is desirable to know antenna polar patterns and efficiencies accurately. In the past, calibration measurements have been made using balloons and aircraft and more recently satellites. These techniques are usually very expensive. It is shown that under
Briggs, B. H., Candy, B., Vincent, R. A.
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Advanced Engineering Materials, EarlyView.A new experimental setup, incorporating digital image correlation and infrared thermography in combination with inductive‐conductive heating for precise temperature control, is used to analyze the mechanical behavior and microstructural changes of sheet metal under complex thermomechanical test conditions that represent quench and partitioning ...
Christian Illgen +4 more
wiley +1 more source
Receiving antenna electrodynamic model in terms of waveguide representation of HF field
Solar-Terrestrial Physics, 2018 The receiving antenna is an important part of a radio channel that requires electrodynamic approach in mathematical simulation of its characteristics. Since the invention of radio, and due to further theoretical studies of radio signal transmission, the ...
Khakhinov V.V.
doaj +1 more source
LUNASKA simultaneous neutrino searches with multiple telescopes
, 2011 The most sensitive method for detecting neutrinos at the very highest energies is the lunar Cherenkov technique, which employs the Moon as a target volume, using conventional radio telescopes to monitor it for nanosecond-scale pulses of Cherenkov ...
Aartsen, M. +9 more
core +1 more source
A monopole antenna at optical frequencies: single-molecule near-field measurements [PDF]
, 2007 We present a monopole antenna for optical frequencies (~600 THz) and discuss near-field measurements with single fluorescent molecules as a technique to characterize such antennas.
Hulst, Niek F. van +2 more
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Advanced Engineering Materials, EarlyView.High‐performance nickel‐based superalloys are often not processible in additive manufacturing (AM) due to hot cracking. The findings in this manuscript propose an efficient method to mitigate cracking and enhance mechanical properties of these alloys by producing a metal matrix composite, contributing to the material and process perspective of the AM ...
Klaus Büßenschütt +3 more
wiley +1 more source
Minimized Low-Profile Wideband Antennas Using High Impedance Surface
International Journal of Antennas and Propagation, 2017 This paper proposes minimized low-profile wideband antenna by employing high impedance surface (HIS), for wireless application scenarios at radio frequency, microwave, and even terahertz.
Yizhu Shen
doaj +1 more source
Simulation of microstrip radio altimeter antenna for aircraft
Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioèlektroniki, 2021 The purpose of the article is to carry out mathematical modeling of the main characteristics and parameters of a microstrip antenna, the dielectric substrate of which is created from a domestic ceramic sample and to substantiate the use of a microstrip ...
A. V. Gusinski +5 more
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Impact of Power Allocation and Antenna Directivity in the Capacity of a Multiuser Cognitive Ad Hoc Network [PDF]
, 2012 This paper studies the benefits that power control and antenna directivity can bring to the capacity of a multiuser cognitive radio network. The main objective is to optimize the secondary network sum rate under the capacity constraint of the primary ...
Alfonso, V. +3 more
core +1 more source
Reconfigurable wideband patch antenna for cognitive radio [PDF]
, 2009 Cognitive radio communication is envisaged to be a new paradigm of methodologies for enhancing the performance of radio communication systems through the efficient utilization of radio spectrum.
AbuTarboush, H.F. +9 more
core +2 more sources