Results 11 to 20 of about 22,325 (306)
A Closed-Form Analytical Evaluation of the Directivity of Planar Array Antennas with Different Types of Radiating Elements [PDF]
SensorsThis work presents a fast and general formulation for the directivity computation of planar antenna arrays composed of radiating elements modeled as cosqθ transmitters.
Margaux Pellet +2 more
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Continuous Head-related Transfer Function Representation Based on Hyperspherical Harmonics [PDF]
Archives of Acoustics, 2023 Expressing head-related transfer functions (HRTFs) in the spherical harmonic (SH) domain has been thoroughly studied as a method of obtaining continuity over space. However, HRTFs are functions not only of direction but also of frequency.
Adam Szwajcowski
doaj +1 more source
Applied Sciences, 2021 Flat panel loudspeakers are a promising alternative to conventional loudspeakers. In particular, quasi-omnidirectional radiation at higher frequencies is stressed as an advantage of these systems compared to conventional speaker systems.
Benjamin Zenker +3 more
doaj +1 more source
Design, Analysis, and Simulation of 60 GHz Millimeter Wave MIMO Microstrip Antennas
Journal of Sensor and Actuator Networks, 2022 This article comparatively shows the evolution of parameters of three types of arrays for MIMO microstrip antennas, to which the number of ports is gradually incremented until reaching 32.
Juan Carlos Martínez Quintero +2 more
doaj +1 more source
Micromachines, 2023 We proposed a novel approach based on a complementary split-ring resonator metamaterial in a two-port MIMO antenna, giving high gain, multiband results with miniature size. We have also analyzed a circular disk metasurface design.
Ammar Armghan +8 more
doaj +1 more source
Frontiers in Earth Science, 2021 Rupture directivity, implying a predominant earthquake rupture propagation direction, is typically inferred upon the identification of 2D azimuthal patterns of seismic observations for weak to large earthquakes using surface-monitoring networks. However,
José Ángel López-Comino +9 more
doaj +1 more source
Design and Implementation of a Composite Hydrophone of Sound Pressure and Sound Pressure Gradient
Micromachines, 2021 The bionic cilium MEMS vector hydrophone has the characteristics of low power consumption, small volume, and good low-frequency response. Nevertheless, there exists the problem of left–right ambiguity in the azimuth estimation of a single hydrophone.
Guojun Zhang +6 more
doaj +1 more source
Frontiers in Earth Science, 2021 On October 27, 2017, an Mw 4 earthquake occurred close to the municipality of Montesano sulla Marcellana, less than 10 km external to the concession of the largest European onshore hydrocarbon reservoir—the Val d’Agri oilfield (Southern Italy).
José Ángel López-Comino +7 more
doaj +1 more source
Directivity-Enhanced Detection of a Single Nanoparticle Using a Plasmonic Slot Antenna
, 2022 In situ refractive index sensors integrated with nanoaperture-based optical tweezers possess stable and sensitive responsivity to single nanoparticles.
Yuanhao Lou +19 more
core +1 more source
Nature Inspired MIMO Antenna System for Future mmWave Technologies
Micromachines, 2020 In this work, a new Multiple Input Multiple Output (MIMO) antenna system with a novel shape inspired by nature is proposed for Fifth-Generation (5G) communication systems. The antenna is designed on a Rogers 5880. The dielectric constant of the substrate
Saifur Rahman +8 more
doaj +1 more source