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Field characteristics in the plant culture chamber. The tunable antenna was used to generate EMF of 5 Vm−1 from 800–1000 MHz (A), or 893–911 MHz (B). (A) Standard deviation of amplitude for the total field (σxyz, bold line) and for each of the Cartesian axes (σx, σy, σz); dashed line: 3dB limit specified by the IEC 61000-4-21 standard. (B) Effective values measured within the nonshielded (○) and shielded (Δ) culture chamber. Dashed line: 5 V/m input signal.
