HFR-1 H-Field Rod Antenna: High Sensitivity Magnetic Field Testing

The HFR-1 is a specialized H-field rod antenna element designed for applications requiring extreme sensitivity in magnetic field measurements. Operating over a frequency range of 100 Hz to 100 KHz, this antenna serves as an accurate standard for various compliance standards, including MIL-STD, VDE, and TEMPEST.

Unlike standard loop antennas, the HFR-1 utilizes a ferrite rod core to "concentrate" the magnetic component of RF signals, providing a significantly higher level of sensitivity in a compact, portable form factor. This low frequency antenna is shielded from electric fields and is optimized for use with the EHA-50B Preamplifier to ensure repeatable and reliable data.

For the HFR-1 H-Field Rod Antenna to achieve its specified performance and accuracy, it must be used in tandem with the EHA-50B Matching Preamplifier. This antenna element is engineered to interface directly with the preamplifier's active components, which provide the critical impedance matching and amplification required for the low-frequency range of 100 Hz to 100 KHz. By utilizing the EHA-50B, the system effectively converts magnetic field energy into a calibrated voltage output, ensuring the extreme sensitivity needed for specialized compliance testing. Operating the HFR-1 independently of this matching preamplifier will result in significant measurement errors and will not support the antenna's individual calibration data.