Results 31 to 40 of about 288,050 (300)
Review of Photonic Integrated Optical Phased Arrays for Space Optical Communication
IEEE Access, 2020 A review of photonic integrated optical phased array (OPA) for space optical communication is presented. We review and summarize the typical works of the photonic integrated OPAs with one-dimensional and two-dimensional optical antenna array in recent ...
Jingwen He, T. Dong, Yue Xu
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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 +5 more
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Geometric Phase in Phasing of Antenna Arrays [PDF]
Symposium - International Astronomical Union, 2002 The response of a pair of differently polarized antennas is determined by their polarization states and a phase between them which has a geometric part which becomes discontinuous at singular points in the parameter space. Some consequences are described.
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New method for testing of antenna phased array in X frequency range.
Journal of Physics: Conference Series, 2018 The results of the research of the developed fiber-optic transmission systems for analog high frequency signal are represented. On its basis, a new method to identify various structural defects in the active phased antenna arrays is elaborated.
V. Lenets +4 more
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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 +3 more
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Physical Limitations of Phased Array Antennas [PDF]
IEEE Transactions on Antennas and Propagation, 2021 12 pages, 11 ...
Andrei Ludvig-Osipov +3 more
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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 +2 more
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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 +3 more
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Analysis of beampattern dwell time for planar frequency diverse array
IET Signal Processing, 2021 Frequency diverse array (FDA) has received much attention due to its both range–angle‐dependent beampattern. However, most of the existing works focus on the linear FDA, and time‐varying characteristics of its beampattern only give a rough qualitative ...
Hui Chen, Zi‐Hao Li, Wen‐Qin Wang
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Liquid Crystal Based Dielectric Waveguide Phase Shifters for Phased Arrays at W-Band
IEEE Access, 2019 In this work, the feasibility of microwave liquid crystal based dielectric waveguide phased shifters is investigated in a phased rod antenna array for the first time. For this, a $1\times 4$ rod antenna array is designed including the phase shifters as
R. Reese +8 more
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