Results 21 to 30 of about 27,838 (269)
Factorization of Antenna Efficiency of Aperture-Type Antenna: Beam Coupling and Two Spillovers [PDF]
IEEE Transactions on Antennas and Propagation, 2021 Antenna efficiency is one of the most important figures-of-merit of a radio telescope for observations especially at millimeter wavelengths or shorter wavelengths, even for a multibeam radio telescope. To analyze a system with a beam waveguide, a lossless antenna consisting of two apertures in series is considered in the frame of the scalar wave ...
Makoto Nagai +2 more
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Antenna Array Diversity Evaluation Under Multipath Environments With Digital Beamforming
IEEE Open Journal of Antennas and Propagation, 2023 This work proposes a methodology for evaluating the antenna array diversity and resultant radiation pattern from digitally-processed-based beamforming systems.
Hugo Rodrigues Dias Filgueiras +3 more
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On the use of Purcell factors for plasmon antennas [PDF]
Optics Letters, 2010 The Purcell factor is the standard figure of merit for spontaneous emission enhancement in microcavities, that has also been proposed to describe emission enhancements for plasmonic resonances. A comparison is made of quality factor, mode volume and Purcell factor for single and coupled plasmon spheres to exact calculations of emission rates. The paper
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Minimization of Antenna Quality Factor [PDF]
IEEE Transactions on Antennas and Propagation, 2017 9 pages, 8 figures, 2 tables, submitted to IEEE ...
Miloslav Capek +2 more
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Directive Antenna for Ultrawideband Medical Imaging Systems
International Journal of Antennas and Propagation, 2008 A compact and directive ultrawideband antenna is presented in this paper. The antenna is in the form of an antipodal tapered slot with resistive layers to improve its directivity and to reduce its backward radiation.
Amin M. Abbosh
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Antenna factorization in strongly ordered limits [PDF]
Physical Review D, 2005 When energies or angles of gluons emitted in a gauge-theory process are small and strongly ordered, the emission factorizes in a simple way to all orders in perturbation theory. I show how to unify the various strongly-ordered soft, mixed soft-collinear, and collinear limits using antenna factorization amplitudes, which are generalizations of the ...
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Antenna Allocation in MIMO Radar with Widely Separated Antennas for Multi-Target Detection
Sensors, 2014 In this paper, we explore a new resource called multi-target diversity to optimize the performance of multiple input multiple output (MIMO) radar with widely separated antennas for detecting multiple targets.
Hao Gao +3 more
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ESTIMATION OF ANTENNA FACTOR OF MICROSTRIP PATCH ANTENNA AS EMI SENSOR [PDF]
Progress In Electromagnetics Research Letters, 2008 This paper presents the result for antenna factor of microstrip patch antenna when used as electromagnetic interference (EMI) sensor. Antenna factor is an important parameter of a sensor used for EMI measurements. The microstrip antenna has found wide application as transmit and receive antenna in modern microwave systems.
Saswati Ghosh +2 more
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Review of Printed Log-Periodic Dipole Array Antenna Design for EMC Applications
InventionsThis article presents a brief evaluation and discussion of eight proposed printed log-periodic dipole array (PLPDA) antennas that have been introduced in the last decade for EMC applications.
Abdulghafor A. Abdulhameed +1 more
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AxiomsIn this paper, we propose a new modified planar Kelvin–Stuart model. We demonstrate some modules for investigating the dynamics of the proposed model.
Nikolay Kyurkchiev +4 more
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