Characterizing a GPR‐antenna system by near‐field electric field measurements

2006 ◽  
Author(s):  
Rita Streich ◽  
Jan van der Kruk
Keyword(s):  
Electric Field ◽  
Near Field ◽  
Field Measurements ◽  
Antenna System ◽  
Electric Field Measurements

Characterizing a GPR antenna system by near-field electric field measurements

Geophysics ◽  
2007 ◽  
Vol 72 (5) ◽  
pp. A51-A55 ◽  
Author(s):  
Rita Streich ◽  
Jan van der Kruk
Keyword(s):  
Electric Field ◽  
Field Data ◽  
Near Field ◽  
Field Measurements ◽  
Input Voltage ◽  
Antenna System ◽  
Inversion Method ◽  
Migration Imaging ◽  
Imaging Algorithms ◽  
Electric Field Measurements

A method to determine current distributions on resistively loaded Wu-King-type antennas from sparse near-field measurements of the electric field is introduced. We use a parametric formulation of current flow and invert the measured data to determine the characteristic antenna parameters and input voltage wavelets that best explain the measured electric-field data. We compare modeled and measured electric-field data to show that our inversion method yields reasonable results and that our antenna model provides a means to correct for the effects of an antenna’s finite length in migration/imaging algorithms. By modifying the description of the current distribution, our method may be adapted for various antenna types.

Post-processing of electric field measurements to calibrate a near-field dipole probe

2011 ◽  
Vol 5 (2) ◽  
pp. 29-36 ◽  
Author(s):  
Z. Riah ◽  
D. Baudry ◽  
A. Louis ◽  
M. Kadi ◽  
B. Mazari
Keyword(s):  
Electric Field ◽  
Near Field ◽  
Field Measurements ◽  
Post Processing ◽  
Electric Field Measurements

scholarly journals Electric field measurements of the LH wave and ICRF near-field utilizing non-perturbative spectroscopic techniques

2015 ◽  
Author(s):  
E. H. Martin ◽  
J. B. O. Caughman ◽  
C. C. Klepper ◽  
M. Goniche ◽  
R. C. Isler ◽  
...  
Keyword(s):  
Electric Field ◽  
Near Field ◽  
Field Measurements ◽  
Spectroscopic Techniques ◽  
Electric Field Measurements

Atomic 2D electric field imaging of a Yagi–Uda antenna near-field using a portable Rydberg-atom probe and measurement instrument

2020 ◽  
Vol 9 (5) ◽  
pp. 305-312
Author(s):  
Ryan Cardman ◽  
Luís F. Gonçalves ◽  
Rachel E. Sapiro ◽  
Georg Raithel ◽  
David A. Anderson
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Field Measurement ◽  
Near Field ◽  
Measurement Instrument ◽  
Rydberg Atom ◽  
Field Measurements ◽  
Atom Probe ◽  
Electric Field Measurement ◽  
Measurement Uncertainties

AbstractWe present electric field measurements and imaging of a Yagi–Uda antenna near-field using a Rydberg atom–based radio frequency electric field measurement instrument. The instrument uses electromagnetically induced transparency with Rydberg states of cesium atoms in a room-temperature vapor and off-resonant RF-field–induced Rydberg-level shifts for optical SI-traceable measurements of RF electric fields over a wide amplitude and frequency range. The electric field along the antenna boresight is measured using the atomic probe at a spatial resolution of ${\lambda }_{RF}/2$ with electric field measurement uncertainties below 5.5%, an improvement to RF measurement uncertainties provided by existing antenna standards.

scholarly journals Modulation of urban atmospheric electric field measurements with the wind direction in Lisbon (Portugal)

2015 ◽  
Vol 646 ◽  
pp. 012013 ◽  
Author(s):  
H G Silva ◽  
J C Matthews ◽  
R Conceição ◽  
M D Wright ◽  
S N Pereira ◽  
...  
Keyword(s):  
Electric Field ◽  
Wind Direction ◽  
Field Measurements ◽  
Atmospheric Electric Field ◽  
Electric Field Measurements
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