Far-Field Radiation Estimation from Near-Field Measurements and Image Theory


This paper proposed a near-field to far-field transformation method for the radiation sources located on a large ground plane, based on the Huygens's principle and image theory. This method uses the tangential electromagnetic fields on a small near-field plane and the vertical electric fields, one tangential component (parallel to the ground plane) of magnetic fields around the near-field plane to extract the equivalent current sources. The far-field radiations are calculated from these equivalent sources and their images. The application of this method in several simulation models indicates that it has very good performance on both simple printed circuit boards and antenna radiation estimation. The method proposed in this paper can decrease the total scanning area in real measurements. .

Meeting Name

2014 IEEE International Symposium on Electromagnetic Compatibility (2014: Aug. 4-8, Raleigh, NC)


Electrical and Computer Engineering

Research Center/Lab(s)

Center for High Performance Computing Research

Second Research Center/Lab

Electromagnetic Compatibility (EMC) Laboratory

Keywords and Phrases

Antenna radiation; Electric fields; Electromagnetic fields; Microstrip antennas; Printed circuit boards; Printed circuits; Equivalent currents; Far-field radiation; Huygens; Image theory; Near field to far field transformations; Near-field measurement; Tangential components; Vertical electric fields; Electromagnetic compatibility; Huygens's principle

International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version


File Type





© 2014 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

08 Aug 2014