Antennas & Radio Wave Propagation
Reconfigurable antennas and radio wave propagation at millimeter-wave frequencies
... reconfigurable antennas is the use of conformal antennas and ...for Antennas: “conformal antenna is an antenna (an array) that conforms to a surface whose shape is determined by considerations other ...
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Geometrically Based Channel Model for Indoor Radio Propagation with Directional Antennas
... Abstract—A geometrically based channel model is proposed to describe radio propagation in an indoor environment with directional antennas. In conventional geometric channel models (GCMs), ...
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Counter Measures for Null Direction Propagation of Antennas in Tactical High Frequency Sky Wave Communication
... sky wave. Ionosphere plays an important part in the propagation of ...HF radio link was having both way communication with one end having dipole antenna and other end having the rod ...of ...
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US Navy Training Course Electronics Technician Volume 07 Antennas and Wave Propagation pdf
... a radio wave may follow between transmitter and ...Such propagation paths include the ground wave, ionospheric refraction, reradiation by the ionospheric layers, reflection from the earth’s ...
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Development of Radio Wave Propagation Model in Indoor Non-Line-of-Sight (NLOS) Scenario
... Radio wave propagation describes a significant role in the performance of radio ...systems. Radio waves, i.e. electromagnetic waves, are propagated in a radio channel that is ...
13
Effect Of Terrain Features On Wave Propagation
... electromagnetic propagation over buildings between the base station and ...mobile radio system and accurate prediction methods are needed to determine the parameters of a radio system which will ...
24
Sputter deposited tin oxide thin film properties and their application for radio wave propagation
... log-periodic antennas from Aeriona company having a frequency range of 800 MHz to ...The antennas were connected to network analyzer (Rohde & Schwarz ZVB4) through 50Ω standard ...
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Wave Propagation in Nanocomposite Materials
... Granular periodic materials are currently used in mec- hanical engineering and, with the ob-jective to appraise their properties, theoretical studies have been devoted to acoustic wave propagation in these ...
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Wave propagation in granular materials
... The natural frequency of the box in the direction of wave propagation (based on calculated wave speeds in glass beads) is 325 Hz. Additional resonant frequencies exist in the dynamics of the ...
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Electromagnetic Wave Propagation in Square Law Wave Guides
... this wave guide, a paraxial approximation of the wave equations, satised by the electric and magnetic components of the electromagnetic eld, has been ...paraxial wave equations describe beam ...
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Ultrasonic wave propagation in powders
... The aim of this paper is to investigate the feasibility of using ultrasonic techniques to monitor powder caking. The theory of ultrasonic wave propagation in powder will be discussed. Two ultrasonic ...
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Air Shower Detection by Arrays of Radio Antennas
... digital radio technique were LOPES, the radio extension of the KASCADE- Grande detector [24, 25], and CODALEMA, a dedicated radio array in France ...a radio-loud environ- ment, LOPES provided ...
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Radio wave propagation in curved rectangular tunnels at 5 8 GHz for metro applications, simulations and measurements
... Nowadays, the need for wireless communication systems is increasing in transport domain. These systems have to be operational in every type of environment and particularly tunnels for metro applications. These ones can ...
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Multimedia Pedestal for the Wave Radio and Wave Radio/CD. Owner s Guide
... radiate radio frequency energy and, if not in- stalled and used in accordance with the instructions, may cause harmful interference to radio ...to radio or television reception, which can be ...
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Analyzing and Modeling of Geo Spatial Effect on Radio Wave Propagation System Using Geospatial Technologies
... cell Radio communication. The fundamental operations in the radio com- munication organize industry consolidate framework site conspicuous evidence and masterminding, signal quality estimations with scope ...
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Atmospheric Millimetre Wave Propagation.
... Amplitude scintillations of millimetre radio waves depend on the fluctuations of the atmospheric refractive index which in turn has a time dependence which is a [r] ...
311
Radio propagation measurement for broadband system
... The phenomenon of reflection, diffraction and scattering all give rise to additional radio propagation paths beyond the direct optical "line of sight" path between the radio transmitter [r] ...
24
Wave propagation in an inhomogeneous medium
... further away from the axis takes less time to travel from source to receiver than sound energy traveling closer to the axis,.. of sound energy in the sound channel at certain ranges.[r] ...
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Radio Propagation Prediction for HF Communications
... HF propagation is basically split into skywave, groundwave and near vertical incidence ...Groundwave propagation is used for relatively short links over a few tens of kilometres whereas skywave ...
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White Paper on High Antennas for Radio Communications (HARC)
... high antennas on the aerostat via a single optical fiber in the aerostat’s ...for radio maintenance and crypto key loading. All radio controls are at the User’s ...
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