FIGURE 1.

The optimization setup containing 2 dipole antennas (center‐to‐center distance 6 cm), on a phantom with tissue mimicking dielectric properties (ε_r = 0.34, σ = 0.4 S/m). The number of periods, the width, and the modulation of the snake dipole were varied. ${\mathrm{B}}_1^{+}$ was calculated in a 10 × 10 × 10 cm³ cubical region of interest (ROI), centered at 10 cm depth