The 135A RF Helmholtz Coil generates a controlled, well-defined magnetic field between its coils. This magnetic field can be used to calibrate magnetic field probes or to generate a controlled field for testing other devices. The 135A is optimized for high-frequency performance and is usable up to 30 MHz. The 135A includes fixturing to precisely hold the Beehive Electronics 100A, 100B, and 100C EMC probes so that the user may measure the sensitivity of the probes and calculate their calibration factors. Mounting holes are provided to allow the user to fixture other devices inside the Helmholtz coil.
Because the coils of the 135A are designed to have low inductance, the 135A is usable to a much higher frequency than traditional Helmholtz coils. It can be used from DC up to 30 MHz. This allows the user to calibrate magnetic field sensors or test samples at higher frequencies than was previously possible.