Results 31 to 40 of about 30,437 (345)
IET Microwaves, Antennas & Propagation, 2021 In this article, three novel slotted substrate integrated waveguide (SIW) antenna elements are demonstrated with different radiator configurations, namely, two arms Archimedean antenna, single‐arm spiral antenna (monofilar), and four concentric circular ...
Alla M. Eid +2 more
doaj +1 more source
Moment method analysis of an archimedean spiral printed on a layered dielectric sphere [PDF]
, 2008 A method of moments model is presented to analyze Archimedean spirals that are printed on a layered dielectric sphere. The model is derived assuming an arbitrary location of the spiral.
Khamas, S.K.
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A Broadband Planar Spiral Antenna Design for Electromagnetic Signal Monitoring
IEEE Access, 2020 In order to meet the wide-band full-space radio monitoring task, the design of a circular-polarized planar dual-arm composite spiral antenna is presented in this paper.
Daifu Chen, Hongxin Zhang, Jun Xu
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Novel Square Spiral Antennas for Broadband Applications [PDF]
Frequenz, 2009 An investigation of novel square spiral antennas is presented. The antennas are designed by considering the special arrangements of spiral arms. The new designs perform much better in terms of the frequency independency of the fundamental antenna parameters, when compared with the well known and widely used Archimedean spiral antenna, which makes the ...
Saynak, Ugur, Kustepeli, Alp
openaire +3 more sources
International Journal of Antennas and Propagation, 2018 This paper presents, for the first time, the hybrid use of loading techniques (which involve terminating the spiral arms with different structures to give a resistive or capacitive effect) and a novel technique of cavity groove in order to enhance the ...
Muhammad Hamza, Wasif T. Khan
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IEEE Access, 2021 This paper presents a new design for a wideband circularly polarized (CP) spiral antenna array fed by a differential aperture coupling. The differential excitation is realized by two vias located at the lateral sides of a transverse slot etched on the ...
Elham Baghernia +2 more
doaj +1 more source
Computational Analysis of a Spiral Thermoelectric Nanoantenna for Solar Energy Harvesting Applications [PDF]
, 2014 Thermo-electrical nanoantennas have been proposed as an alternative option for conversion solar energy harvesting applications. In this work, the response of a spiral broadband antenna has been obtained from numerical and theoretical simulations ...
Alda, Javier +7 more
core +2 more sources
A Novel Four-Arm Planar Spiral Antenna for GNSS Application
IEEE Access, 2021 This letter introduces a novel four-arm planar spiral antenna which provides a perfect circular polarization radiation for Global Navigation Satellite System applications. The antenna mainly consists of four parts: an Archimedes spiral radiation area, an
Lili Guo +4 more
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Millimeter-Wave Lumped Element Superconducting Bandpass Filters for Multi-Color Imaging [PDF]
, 2009 The opacity due to water vapor in the Earth's atmosphere obscures portions of the sub-THz spectrum (mm/sub-mm wavelengths) to ground based astronomical observation.
Day, Peter K. +5 more
core +2 more sources
FEBS Letters, EarlyView.In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai +9 more
wiley +1 more source