Results 21 to 30 of about 1,436 (260)

Integrated circular optical phased array [PDF]

EPJ Web of Conferences, 2021
Existing OPAs are typically based on 2D rectangular arrays or 1D linear arrays. Both approaches present a limited field-of-view (FOV) due to the presence of the grating lobes when the element spacing is larger than λ/2.
Liu Qiankun, Smy Tom, Atieh Ahmad, Cheben Pavel, Sánchez-Postigo Alejandro, Ye Winnie N.   +5 more
doaj   +1 more source

DIRECTIVITY OF ANTENNA ARRAYS [PDF]

Radio Physics and Radio Astronomy, 2016
Purpose: Theoretical investigation of directive gains of linear and planar antenna arrays depending on the distance between radiators and wavelength.
A. A. Bulgakovа, N. N. Gorobets, V. A. Katrich, V. A. Lyashchenko   +3 more
doaj   +1 more source

Nonreciprocal Phased-Array Antennas [PDF]

Physical Review Applied, 2019
26 pages; 16 figures; 1 ...
Zang, J. W., Alvarez-Melcon, A., Gomez-Diaz, J. S.   +2 more
openaire   +2 more sources

Wi-Fi Access Point Design Concept Targeting Indoor Positioning for Smartphones and IoT

Sensors, 2022
Indoor positioning systems (IPS) have been regarded as essential for many applications, particularly for smartphones, during the past decade. With the internet of things (IoT), and especially device-to-device (D2D) cases, the client is supposed to have a
Mohamed S. El-Gendy, Imran Ashraf, Samy El-Hennawey   +2 more
doaj   +1 more source

Microwave phased array for aerological radar [PDF]

ITM Web of Conferences, 2019
The use of radars with phased antenna arrays in aerological atmospheric sounding systems significantly increases the technical characteristics of the radio channel, ensures reliable auto-tracking in the near zone at high angular velocities of the ...
Shabunin Sergey, Plokhov Sergey, Bukrin Ilia, Chechetkin Victor   +3 more
doaj   +1 more source

Analytical beampattern synthesis for symmetric nonuniform linear array based on superposition principle

Electronics Letters, 2023
In this letter, an analytical method for the beampattern synthesis of symmetric nonuniform array is proposed. This method consists of two steps. In the first step, it acquires a real symmetric excitation by the convex optimization method to attain a ...
Fei Shi, Mengkai Hu, Xiuquan Dou
doaj   +1 more source

A Design Proposal Using Coherently Radiating Periodic Structures (CORPSs) for 2-D Phased Arrays of Limited Scanning

Applied Sciences
New configurations of 2-D phased arrays are proposed in this paper for reducing the number of phase shifters. This design methodology is based on the use of a novel coherently radiating periodic structures (CORPSs) block for 2-D phased arrays.
Gilberto Calvillo, Marco A. Panduro, Elizvan Juarez, Alberto Reyna, Carlos del Rio   +4 more
doaj   +1 more source

60 GHz compact broadband antenna arrays with wide-angle beam steering

The Journal of Engineering, 2019
Highly integrated multilayered printed circuit board-based patch antenna arrays are proposed in this study for 60 GHz wireless communications. Electromagnetic coupling between two stacked patches is used to achieve
Imran Aziz, Robin Dahlbäck, Robin Dahlbäck, Erik Öjefors, Kristoffer Sjögren, Anders Rydberg, Dragos Dancila   +6 more
doaj   +1 more source

Analysis of the influence of radiators basing errors in the monopulse phased array antenna aperture on its characteristics [PDF]

ITM Web of Conferences, 2019
The influence of radiators basing errors in the flat monopulse phased array antenna with spatial excitation on the beam forming accuracy is researched.
Rusov Yury
doaj   +1 more source

Phased array antennas in MIMO receiver

Journal of Telecommunications and Information Technology, 2006
In this paper, a computer simulation of a MIMO system comprising phased array antennas (PAA) in all receiving branches is presented. In order to examine the system performance under relatively realistic conditions, a ray-tracing simulator was applied to generate a baseband channel impulse response matrix H.
Sebastian Kozłowski, Yevhen Yashchyshyn, Józef Modelski   +2 more
openaire   +2 more sources