Results 21 to 30 of about 68,865 (333)

Closed-loop antenna selection for wireless LANs with directional & omni-directional elements [PDF]

open access: yes, 2011
Throughput and packet error rate are analysed in a home environment for two different 3×3 wireless LAN solutions. A 3×3 EBF approach (using three radio chains) is compared with a reduced cost 2×2 architecture (using two radio chains). In the 2×2 solution
Halls, DE   +4 more
core   +2 more sources

Throughput sensitivity to antenna pattern and orientation in 802.11n networks [PDF]

open access: yes, 2011
In this paper the throughput and packet error rate for an in-home 802.11n network is theoretically derived for two different types of 3x3 antenna configurations.
Halls, DE   +4 more
core   +2 more sources

The Recent Advancement in Unmanned Aerial Vehicle Tracking Antenna: A Review

open access: yesSensors, 2021
Unmanned aerial vehicle (UAV) antenna tracking system is an electromechanical component designed to track and steer the signal beams from the ground control station (GCS) to the airborne platform for optimum signal alignment.
Anabi Hilary Kelechi   +7 more
doaj   +1 more source

Symmetric connectivity with directional antennas [PDF]

open access: yesComputational Geometry, 2013
Let P be a set of points in the plane, representing directional antennas of angle a and range r. The coverage area of the antenna at point p is a circular sector of angle a and radius r, whose orientation is adjustable. For a given orientation assignment, the induced symmetric communication graph (SCG) of P is the undirected graph that contains the ...
Aschner, Rom   +2 more
openaire   +3 more sources

STUDY OF THE TOPOLOGY OF THE VIVALDI ANTENNA WITH A MIRROR ARRANGEMENT OF THE PETALS

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2019
Objectives. In work questions of a research of topology of the antenna of Vivaldi with a mirror arrangement of petals are considered.Method. By modeling in the program CST MicroWave Studio environment collecting necessary data, in particular dependence ...
T. G. Aslanov, S. A. Ibragimov
doaj   +1 more source

Enhancing and redirecting carbon nanotube photoluminescence by an optical antenna [PDF]

open access: yes, 2010
We observe the angular radiation pattern of single carbon nanotubes' photoluminescence in the back focal plane of a microscope objective and show that the emitting nanotube can be described by a single in-plane point dipole.
Böhmler, Miriam   +6 more
core   +1 more source

Topological Design of Planar Circularly Polarized Directional Antenna with Low Profile Using Particle Swarm Optimization

open access: yesInternational Journal of Antennas and Propagation, 2017
A topological method for the design and optimization of planar circularly polarized (CP) directional antenna with low profile was presented. By inserting two parasitic layers, generated by particle swarm optimization, between the equiangular spiral ...
Xiaonan Zhao   +5 more
doaj   +1 more source

A digital beamforming algorithm of horizontally polarized directional antenna array

open access: yesDianzi Jishu Yingyong, 2020
In this paper, the digital beamforming algorithm for horizontally polarized directional antenna array in narrowband multipath environment is studied.
Tang Tao, Ma Huan, Wu Zhidong
doaj   +1 more source

Frequency selective surface loaded antenna for direct antenna modulation [PDF]

open access: yes2017 11th European Conference on Antennas and Propagation (EUCAP), 2017
A reconfigurable antenna loaded with Frequency Selective Surfaces (FSS) to achieve direct antenna phase modulation is presented and simulated. Placing FSS with integrated varactor diodes into a monopole-fed cavity allows control of the transmitted phase of a carrier signal with a bias voltage.
Henthorn, S., Ford, K.L., O'Farrell, T.
openaire   +2 more sources

Calibration of the Logarithmic-Periodic Dipole Antenna (LPDA) Radio Stations at the Pierre Auger Observatory using an Octocopter [PDF]

open access: yes, 2017
An in-situ calibration of a logarithmic periodic dipole antenna with a frequency coverage of 30 MHz to 80 MHz is performed. Such antennas are part of a radio station system used for detection of cosmic ray induced air showers at the Engineering Radio ...
Aab, A.   +404 more
core   +3 more sources

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