Results 71 to 80 of about 92,941 (196)
Massive MIMO performance evaluation based on measured propagation data
, 2015 Massive MIMO, also known as very-large MIMO or large-scale antenna systems, is a new technique that potentially can offer large network capacities in multi-user scenarios.
Edfors, Ove +3 more
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IET Microwaves, Antennas & PropagationThe present article proposes a novel hybrid approach for addressing the synthesis problem of rectangular planar arrays under multiple constraints, through joint optimization of the weight function and the improved grey wolf optimization (IGWO) algorithm.
Kui Tao +4 more
doaj +1 more source
The Fundamentals of Radar with Applications to Autonomous Vehicles [PDF]
, 2019 Radar systems can be extremely useful for applications in autonomous vehicles. This paper seeks to show how radar systems function and how they can apply to improve autonomous vehicles.
Rummel, Kameron
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Active Electrically Small Antenna Based on Superconducting Quantum Array
, 2012 We introduce Superconductive Quantum Arrays (SQAs) and propose to use these structures as active Electrically Small Antennas (ESA). Several prototypes of the active ESA were fabricated using Nb process with critical current density 4.5 kA/cm2 and ...
Klenov, Nikolay V. +4 more
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A Wideband, Circularly Polarized, Directive Antenna With a Circular Reflector
IEEE Access, 2019 A two-element, patch antenna with a single feed is presented to achieve wideband, circular polarization, and uni-directional radiation. The driven element of the antenna has a rotated, corner-truncated radiating patch to achieve circularly polarized ...
Tyler J. Mcpherson +2 more
doaj +1 more source
مجلة النهرين للعلوم الهندسيةThis research studies the capabilities of antenna arrays known as switched active switched parasitic antennas (SASPA) in enhancing the direction of arrival (DOA) estimation of received signals.
Rabah Jasem
doaj +1 more source
An improved RIME optimization algorithm and its application in linear antenna arrays side lobe level suppression [PDF]
AIP AdvancesThe pattern synthesis technique of antenna arrays has a wide range of applications in radar and communication systems, which is an important research direction in the field of smart antennas.
Yibo Wang +4 more
doaj +1 more source
Relationship of spaced antenna and Doppler techniques for velocity measurements (keynote paper), part 3 [PDF]
The Doppler, spaced-antenna and interferometric methods of measuring wind velocities all use the same basic information, the Doppler shifts imposed on backscattered radio waves, but they process it in different ways.
Vincent, R. A.
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IEEE AccessThis paper presents a simplified ultra-wideband tightly coupled antenna (SUTCA) array that achieves unprecedented bandwidth without lossy materials or frequency selective surfaces.
Hong Tang +7 more
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Antenna structures based on combined slot-vibrator emitters with impedance passive elements
Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електронікаRelevance. The research is aimed at solving current problems related to the construction of mathematical models, methods and algorithms for calculating complex multi-element radiating structures, antenna systems and arrays, determining the physical ...
Berdnyk S. L. +4 more
doaj +1 more source