Helmholtz coils for MIL-STD-462D RS101 testing

The design of a square Helmholtz coil pair for MIL-STD-462D RS101 radiated susceptibility magnetic field testing is detailed. The square coil shape provides a uniform magnetic field volume that is better suited to typical DUT (device under test) shapes when compared to round coils. The coil pair provides a 30/spl times/30/spl times/40 inch (76/spl times/76/spl times/102 cm) test volume. Capacitors are used to resonate the coils and reach the MIL-standard specified test field levels over most of the frequency range.