near-field to far-field transformation
On the Near-Field Sampling and Truncation Errors in Planar Time-Domain Near-Field to Far-Field Transformation
... TIME-DOMAIN NEAR-FIELD TO FAR-FIELD TRANSFORMATION In this section, we first recall the equations expressing the NF to FF transformation based on the Green’s ...
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NEAR-FIELD TO FAR-FIELD TRANSFORMATION WITH PLANAR SPIRAL SCANNING
... Abstract—A transformation procedure directly computing the antenna far-field pattern from near-field samples acquired on a planar spiral is proposed in this ...
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Impact of Near-Field-To-Far-Field Transformation on SAR Images Formed in an Indoor Non-Anechoic Environment
... the near- field calibrated, far-field calibrated, and transformed data once again decreases as the range ratio ...the near- field calibrated, far-field calibrated, ...
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Near-Field-Far-Field Transformation Technique with Helicoidal Scanning for Elongated Antennas
... accurate near-field — far-field transformation technique with helicoidal scanning is proposed in this ...required near- field data when dealing with elongated ...the far-field ...
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Near-field measurement of continuously modulated fields employing the time-harmonic near- to far-field transformation
... tion (NFFFT) (Yaghjian, 1986), where advanced algorithms such as the fast irregular antenna field transformation algo- rithm (FIAFTA) offer various source representations and ad- ditional diagnostic ...
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NUFFT-Accelerated Plane-Polar (Also Phaseless) Near-Field/Far-Field Transformation
... Abstract—The paper introduces the use of Non-Uniform Fast Fourier Transform (NUFFT) routines in “complex” (i.e., amplitude and phase) and phaseless Near-Field/Far-Field transformations. The ...
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Spherical Near Field Far Field Transformation for Quasi Planar Antennas from Irregularly Spaced Data
... effective near-field - far-field (NF - FF) transformation with spherical scanning for quasi-planar antennas from ir- regularly spaced data is developed in this ...FF ...
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Chapter 8 NEAR-TO-FAR-FIELD TRANSFORMATION
... of far-field ...analyze far- field problems based on all the techniques we have discussed in previous ...the far-field data can only be obtained by extending the FDTD lattice to ...
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Algebraic Algorithm for Mixed Near-Field and Far-Field Sources Classification and Localization
... two transformation matrices which contain the AOAs and ranges of all sources can be ...two transformation matrices are constructed by first-order and second- order terms in two different ...
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The Unified Theory of Near-Field-Far-Field Transformations with Spiral Scannings for Nonspherical Antennas
... coaxial line, operating at 10 GHz. It has been obtained from a WR- 90 waveguide by cutting in it two rows each of 10 round-ended slots. These rows are at the same distance from the center line of the broad waveguide ...
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Software package for Spherical Near-Field Far-Field Transformations with Full Probe Correction
... This problem has been solved by the companion program ROSCOE, an integral part of the SNIFT software package. ROSCOE implements an algorithm for rotating the spherical wave coefficients, calculated in a SNIFT ...
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Tailoring Thermal Radiation from Near Field to Far Field
... of near-field radiative ...in near-field radiative ...of near-field thermal ...from near zero to 600 Wm − 2 K − 1 with a gap distance of 100 nm at room ...
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Phase Shifting Holography for THz Near-Field/Far-Field Prediction
... final far-field precision will inevitably depend on how accurately the near-field reference wave can be measured or perhaps ...reference field switched ...
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Near field/far field interface of a near surface low level radioactive waste site
... A black deposit was observed in leachate columns containing non-sterilised sand. Prevention of precipitate formation by sterilisation or addition of Kathon, an inhibitor of microbial growth, indicated that the process ...
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Near-Field Far-Field RFID Reader Antenna for European UHF Band
... coupled near-field system implements coils for both the reader and tag ...magnetic field produced is uniform on the entire region enclosed by the ...the near-field tags from the loop’s ...
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Compact Loop Antenna for Near-Field and Far-Field UHF RFID Applications
... with near-field RFID tag and up to 1.17 m with far-field RFID ...available far-field gain,strong current and uniform magnetic near-field ...
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Localization for Mixed Near-Field and Far-Field Sources by Interlaced Nested Array
... of near-field signals versus ...mixed near-field and far-field sources by using an interlaced nested array is ...of near-field sources. Meanwhile, the near-field and far-field sources ...
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A Broadband UHF Tag Antenna For Near-Field and Far-Field RFID Communications
... Fig. 6. Surface current distribution at 867 MHz. 5. Measurements Setup The experimental setup in an anechoic chamber is il- lustrated in Fig. 7. We characterized the performances of the tag in the near ...
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Near and Far Field Optical Response of Eccentric Nanoshells
... the near- and far-field optical response of eccentric metallic nano- shells as a function of core ...electric field enhancements for resonant excitation of EN plasmons can be substantially ...
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Space-Time Matrix Method for Mixed Near-Field and Far-Field Sources Localization
... Mixed Near-Field and Far-Field Sources Localization Ruiyan Du 1, 2 , Fulai Liu 1, 2, * , and Jinkuan Wang 1, 2 Abstract—Mixed near-field and far-field sources ...
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