An H-Field Rod Antenna is composed of a ferrite rod with a coil around the ferrite and a matching unit (EHA-50B). The benefit of this type of antenna is its compact size and convenience for portable applications. The ferrite material "concentrates" the magnetic component of the RF signal into the coil allowing the physically small antenna to have a larger effective area. In other words, the ferrite rod antenna has a much greater level of sensitivity than if the coil had been used on its own.

This antenna element is shielded from the electric field and is only responsive to the magnetic component making this type of antenna directional. It receives the magnetic component of the RF signal at a right angle to the direction of the RF signal and has deep nulls when the antenna is in line with the direction of the signal.

The A.H. Systems' H-Field Rod Antenna operates efficiently over the frequency range of 5 MHz to 30 MHz. It is suitable for MIL-STD, VDE, and TEMPEST testing, with reliable, repeatable measurements.

Here is a pdf version of our product catalog.

Welcome to A.H. Systems, inc.
A.H. Systems has been established since 1974 and manufactures a complete line of affordable, reliable, EMI test equipment. Our individually calibrated EMI Test Antennas, Preamplifiers, Current Probes and Low-Loss Cables satisfy many test standards including CISPR, MIL-STD, FCC, EN, VDE, IEC and SAE. With a wide variety of mounting configurations, we can also offer tripods and accessories that compliment other EMI testing equipment used to complete your testing requirements. We are also committed to providing all of our clients with no cost prompt and professional technical support. Manufacturing high quality products at competitive prices with immediate shipment plus prompt technical support are our goals to improve the quality of your testing requirements.

Here is a pdf version of our product catalog.