FDTD analysis of antennas close to human tissue.

摘要

Finite-Difference Time-Domain (FDTD) is a numerical method often used to analyze interaction of electromagnetic radiation with complex geometries.;We test antennas in two application scenarios: cell phone radiation and breast cancer detection. For cell phone radiation, we study the maximum average SAR (Specific Absorption Rate) in the human head model exposed to radiation from antennas used typically in mobile telephones: quarter-wave monopole antenna, monopole-helix antenna and patch antenna.;Breast cancer detection with pulsed microwave radiation requires broadband antennas. Characteristics of the bowtie antenna and "Dark Eyes" antenna were studied in the vicinity of a simplified breast tissue model. Special attention is given to comparison of the trans-receiving antennas' sensitivities to the backscattered response from a simulated embedded tumor.;In this work, we use FDTD method to compute electromagnetic fields in the near-field of several antennas types. These antennas include bowtie antenna, "Dark Eyes" antenna, quarter-wave monopole antenna, monopole-helix antenna and patch antenna. Each one of these structures is modeled and numerically tested using the FDTD-based software, which allows us to incorporate detailed models of the human anatomy in the simulation.