Theoretical and measured electric field distributions within an annular phased array: consideration of source antennas.


Journal Article

The magnitude of E-field patterns generated by an annular array prototype device has been calculated and measured. Two models were used to describe the radiating sources: a simple linear dipole and a stripline antenna model. The stripline model includes detailed geometry of the actual antennas used in the prototype and an estimate of the antenna current based on microstrip transmission line theory. This more detailed model yields better agreement with the measured field patterns, reducing the rms discrepancy by a factor of about 6 (from approximately 23 to 4%) in the central region of interest where the SEM is within 25% of the maximum. We conclude that accurate modeling of source current distributions is important for determining SEM distributions associated with such heating devices.

Full Text

Duke Authors

Cited Authors

  • Zhang, Y; Joines, WT; Jirtle, RL; Samulski, TV

Published Date

  • August 1993

Published In

Volume / Issue

  • 40 / 8

Start / End Page

  • 780 - 787

PubMed ID

  • 8258444

Pubmed Central ID

  • 8258444

International Standard Serial Number (ISSN)

  • 0018-9294

Digital Object Identifier (DOI)

  • 10.1109/10.238462


  • eng

Conference Location

  • United States