far-field-to-near-field transformations
The Unified Theory of Near-Field-Far-Field Transformations with Spiral Scannings for Nonspherical Antennas
... of near-field–far-field transformations with spiral scannings for quasi-spherical antennas is extended in this paper to the case of nonspherical ones, ...corresponding near-field–far- field ...
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NUFFT-Accelerated Plane-Polar (Also Phaseless) Near-Field/Far-Field Transformation
... N log N, where N is the overall number of samples [1]. However, when non-uniform grids are involved, standard FFTs do not apply anymore. Due to the computational convenience of the FFT, a popular way to carry out the ...
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Near-field measurement of continuously modulated fields employing the time-harmonic near- to far-field transformation
... Abstract. Near-field far-field transformations (NFFFTs) are commonly performed for time-harmonic fields. Considering arbitrary in-situ measurement scenarios with given transmis- sion ...
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Spherical Near Field Far Field Transformation for Quasi Planar Antennas from Irregularly Spaced Data
... EM field, wherein the NF data needed by the corresponding classi- cal NF - FF transformations are recovered from the ac- quired nonredundant ones by means of proper OSI for- ...
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A comparison of software- and hardware-gating techniques applied to near-field antenna measurements
... hardgated far-field measurement are compared to the reference pattern determined earlier ...transformed far-field are traced back to the incorrect near-field in some regions of ...
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Efficient Localization Algorithm of Mixed Far-Field and Near-Field Sources Using Uniform Circular Array
... F far-field signals and N N near-field signals) impinging on a UCA [11] with radius R and M identical omnidirectional sensors, and the array center is the phase reference ...
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Electronic and Satellite Navigation
... Ez plane of far field,of radiation pattern The plane wave excitation is observed in magnetic field from the near field of matlab simulation of the electronic and satellite na[r] ...
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Jrdf Algorithm for Joint Range-DOA-Frequency Estimation of Mixed Near-Field and Far-Field Sources
... Abstract—This paper presents an effective joint range-DOA-frequency (JRDF) estimation method based on fourth-order cumulants for multiple mixed near-field sources and far-field sources impinging on a symmetric ...
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Multilayer Dielectric Resonator Antenna Transmitarray for Near-Field and Far-Field Fixed RFID Reader
... for far-field RFID ...9 near-field focused DRA transmitarray for fixed RFID at ...the near field-focused transmitarray are compared with that of the far field ...
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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=…
... J.J. Thomson, in 1893, published Notes on Recent Researches in Electricity and Magnetism . This work is often referred to as “the third volume of Maxwell” as it covered results obtained subsequent to the appearance of ...
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Exploring surface wave interaction with angled defects in the near and far field
... Abstract. This paper explores some effects that occur when using laser ultrasound to scan defective samples. Surface defects can often propagate at an angle to the surface; however, for calibration, slots machined normal ...
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Performance of profiled single noise barriers covered with quadratic residue diffusers
... There are a number of methods that can be applied to improve the efficiency of barriers, such as increasing a barrier’s height, utilising sound absorbing materials and different profiles at the top edge. The performance ...
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An Analytic Expression for Near-Field Angular Glint Prediction of Radar Sensor Using Far-Field Scattering Centers Models
... In this paper, we focus on the calculation of angle glint at near field. Based on the phase gradient method, we derive the exact expression of angle glint, which is applicable for the ...
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Near and far field aerodynamics in insect hovering flight: an integrated computational study
... Fig.·3Aiv,v,Biv,v,Civ,v,Diii shows that removing the body changes the vortex wake structure only slightly. Specifically, the trace of the shed TEV seems to expand slightly now that the barrier formed by the body is ...
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Performance of Intez Tank Under Near Fault And Far Field Earthquake Motion
... important lifeline structures in the earthquake region. As water tanks required to provide water for drinking and fire fighting purpose. This type of structure has large mass concentrated at the top of slender supporting ...
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Identification of Near-Field and Far-Field Using Confocal Microscopy Setup for Optical Sensing Applications
... the field intensities I were decreased with increment of distance x for the near-field, and vice versa ...the near-field can be created by using pinhole with a diameter of ...
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A New Approach to Telescope Fourier Optics
... the Near, z in the Fresnel, or z in the Fraunhofer zones of the optical ...a far-field radiating point source, E x , as a function of the polar spatial frequency variables, ( µ ϕ , ) and ...
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Frequency-Domain Blind Source Separation of Many Speech Signals Using Near-Field and Far-Field Models
... We have proposed a robust and precise method by com- bining the DOA-based method and the correlation-based method, which almost completely solves the permutation problem for two sources that come from different directions ...
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Influence of Passive Isolator Parameters on Seismic Response Control of Multi-Span Bridges
... different near-field and far-field earthquakes, to study the effect of the isolator parameters on the seismic response of the isolated bridge and to investigate the optimum parameters of the ...
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Reconstruction of radiating sources
... relationship between the aperture distribution of an aI1.tenna and its far-field radiation pattern, they are not directly applicable to near-field pattern measurements... It is shown.[r] ...
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