Near field representation by far-field samples

2005 ◽  
Author(s):  
G. D'Elia ◽  
G. Leone ◽  
R. Pierri
Keyword(s):  
Near Field ◽  
Far Field ◽  
Field Representation ◽  
Field Samples

scholarly journals Reconstruction of the Far-Field Pattern of Volumetric AUTs from a Reduced Set of Near-Field Samples Collected along a Planar Spiral with a Uniform Step

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1644
Author(s):  
Francesco D’Agostino ◽  
Flaminio Ferrara ◽  
Claudio Gennarelli ◽  
Rocco Guerriero ◽  
Massimo Migliozzi ◽  
...  
Keyword(s):  
Near Field ◽  
Field Pattern ◽  
Far Field ◽  
Interpolation Algorithm ◽  
Radial Line ◽  
Sample Spacing ◽  
Field Samples ◽  
Field Transformation ◽  
Redundant Representation ◽  
Far Field Pattern

An efficient near-to-far-field transformation (NTFFT) technique, wherein the near-field (NF) measurements are acquired along a planar spiral with a uniform step to make the control of the involved positioners easier, is developed in this article. Such a technique is tailored for quasi-spherical, i.e., volumetric, antennas under test and makes use of a reduced number of NF data. An effective two-dimensional sampling interpolation algorithm, allowing the accurate reconstruction of the input NF data for the standard NTFFT with plane-rectangular scan, is obtained by setting the spiral step equal to the sample spacing required for interpolating along a radial line according to the spatial bandlimitation properties of electromagnetic fields, and by properly developing a non-redundant representation along such a spiral. Tests results are reported to demonstrate that the proposed NTFFT technique retains the same accuracy as the standard plane-rectangular one.

Magnetic Tag Antenna for UHF Near-field and Far-Field RFID Applications

2015 ◽  
Vol 5 (2) ◽  
pp. 119
Author(s):  
Mondher Dhaouadi ◽  
M. Mabrouk ◽  
T. Vuong ◽  
A. Ghazel
Keyword(s):  
Near Field ◽  
Far Field ◽  
Rfid Applications
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