antenna far-field region
Multilayer Dielectric Resonator Antenna Transmitarray for Near-Field and Far-Field Fixed RFID Reader
... array antenna exhibiting a near-field (NF) focused radiation, which is able to maximize the field amplitude in a size-limited spot within the antenna near-field region, while not ...
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Compact Loop Antenna for Near-Field and Far-Field UHF RFID Applications
... of antenna surface current distribution at 922 MHz is shown in ...magnetic field above antenna at xy-plane and z = 20 mm is demonstrated, as shown in ...magnetic field distribution on the ...
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Evaluation of the Far Field Radiated by Long Antennas Directly from Data Acquired through a Fast Helicoidal Scanning
... angular region centred on the horizontal plane, the AUT has been considered as enclosed in the smallest sphere able to contain it in [5, 6], whereas more effective AUT modellings, allowing a further reduction of ...
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Fast Antenna Far-Field Measurement for Sparse Sampling Technology
... in antenna measurement and ...NF antenna measurement via sparse E -field sampling in the region where the E -field changes smoothly and dense sampling in the region where the field changes ...
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Far-fields Radiated of a Small Circular Loop Antenna Utilized in Remote Probing of the Earth
... and lying at a certain height (h) in air on a planar two-layered conducting earth. To derive the solutions, firstly we began with the wave equation of the scalar magnetic Hertz potential Π to find the electric and ...
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A CP Antenna of Wide Half-Power Beamwidth for UHF RFID Near- and Far-Field Applications
... polarized antenna is preferred in real scenarios because it ensures far-field tags detection irrespective of their ...both far-field (for solid goods) and near-field tags (liquid drugs) are needed at ...
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Far-Field Reconstruction from a Minimum Number of Spherical Spiral Data Using Effective Antenna Modelings
... Let us consider an AUT and a nondirective probe moving along a spiral wrapping a sphere of radius d in the NF region and adopt the spherical coordinate system ( r, ϑ, ϕ ) for denoting an observation point P (Fig. ...
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A SRR-Based Near Field RFID Antenna
... systems: far-field and near- field system. The far-field RFID systems only operate at UHF (840– 960 MHz) bands with electromagnetic waves propagating between the readers and ...magnetic ...
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A Linearly Polarized Rectenna for Far-Field Wireless Power Transfer
... near field and far field ...near field wireless power transmission, far field wireless power transfer has achieved greater advantages such as longer distances and accurate ...
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Study of Hemi-Spherical Dielectric Resonator Antenna with Change in Dielectric Characteristics of Resonator
... changes. Far-field radiations of the antenna system also increases but become more concentrated at the region of infinite sphere, the VSWR increases, and the Return Loss along with the ...
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Study of the Radiated Polarization of an Antenna Array with Circular Geometry
... Circular antenna arrays have been widely investigated in the past to steer the radiation pattern [1, ...the antenna array characteristics, such as gain, directivity ...the antenna array reproduces ...
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Cosmic Wireless Power Transfer System and the Equation for Everything E=mc2=vc2/60=a3/T=G(M1+ M2)/4π2=(KE+PE)/1 0E15=Q=PA/F=λ/hc=1/2q=VI=1/2LI2=1/2CV=I2R=…
... spherical antenna several historic and scientific breakthroughs are ...Spherical antenna patterns for planets are presented and flux transfer frequency is calculated using distance to planets as ...
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An Improvement to Directional Equiangular Spiral Antenna with Wide CP Band, High Gain and Low Profile
... The side view of Ant2 is shown in Fig. 1(a). The top layer is equiangular spiral antenna as shown in Fig. 1(b). The two parasitic layers are shown in Fig. 1(c) and Fig. 1(d), respectively. The substrate used for ...
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Design of Four Arm Log Periodic Antenna for MIMO Applications
... Wideband antennas are mostly designed by using angles rather than lengths, because wavelengths are not depending on angles and these are frequency independent antennas. Frequency independent antennas have consistent ...
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Dielectric Resonator Antenna Arrays for Microwave Energy Harvesting and Far-Field Wireless Power Transfer
... the antenna gain and directivity ...most antenna communication applications where gain enhancement is the goal, an inter-element spacing of λ/ 2 between array elements is generally used to provide, not ...
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Matrix Method for Antenna Plane Wave Spectrum Calculation Using Irregularly Distributed Near-Field Data : Application to Far-Field Assessment
... As an alternative to the wave expansion methods, it is possible to model the AUT through a set of equivalent currents distribution ([8–13]). These currents are set from the near-field measurement data, by solving the ...
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Flat Far Field Lenses and Reflectors
... scattered field that focuses at a specific point can be used to design a reflector that would focus the field at a specific focal ...incident field that arrive normal to the reflector to scatter at ...
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Analysis and Design of a Gaussian Backscatter Antenna with Ring Focus Feed
... backscatter antenna with ring focus feed (or ADE antenna) was ...The antenna was analyzed by using the PTD ...reflector antenna with ring focus feed produces higher gain and smaller ...
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Human Exposure Assessment in the Near-Field of Antennas Used by Mobile Phone Devices
... The radio waves that are directed towards the head of the user penetrate into the body tissues for a few cm and tend to be absorbed. In order to have more accurate results power densityis calculated at considerable ...
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Accurate Antenna Isolation Technique for Mitigation of CDMA Interference in a Co-Site Urban Environment
... The rapid growth of Cellular Radio led to the deployment of Systems in close proximity to one another that resulted in increased interference level for shared-site Networks. This Report therefore, contained interference ...
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