Low Cost, Combination RF and Electrostatic Ferrite Device Protection for Electroexplosive Devices

ATI has developed a series of low cost, RF protection devices that are used inside electroexplosive devices EEDs. The first series provided only RF protection using MN 67 Ferrite Formulation manufactured into ferrite beads, baluns, and chokes. An improved Ferrite Formulation, MN 68TM, provides both RF and electrostatic ES protection in the same types of ferrite devices. Now that ATI better understands the EED protection theories, any ferrite that meets an ATI generic specification can be used to provide the combination RF and ES protection. ATI can provide Certified Ferrite Devices that meet the performance characteristics of devices that previously passed MIL STD 1385B field tests in a wide variety of EED applications. These measurements and certifications can be done at three points in the ferrite device production cycle. The first is on the bare ferrite device before it is wound. The second is after the ferrite device has been wound with the appropriate winding pattern to attenuate to the required RF attenuation level. The third point is after the wound ferrite device is permanently installed in the EED. ATI retains samples of each lot of ferrite devices that has passed MIL STD 1385B field testing as baseline standards for certification of subsequent production lots.