Abstract: Devices, systems and methods are disclosed which relate to reproducing and testing a simulation of electromagnetic propagation of multiple Radio Frequency (RF) jammers in an environment to determine the effectiveness of the jammer configuration. In some configurations, a multi-jammer simulator renders the electromagnetic propagation of a multiple jammer scenario, including multiple RF jammers onboard vehicles traveling through the environment, and records a multi-waveform output of the multiple jammer scenario to a recordable medium. A multi-waveform generator reads the multi-waveform output from the recordable medium and physically reproduces a plurality of waveforms consistent with the multi-waveform output. The plurality of waveforms is substantially similar to a physical reproduction of the multiple jammer scenario. An RF receiver, placed within a range of effectiveness of the multi-waveform generator, attempts to receive a signal from an RF transmitter during reproduction of the multi-waveform output.

Abstract: Multilayer armor includes an outside armor layer, a first armor layer underneath the outside armor layer, a second armor layer underneath the first armor layer, and a truss layer underneath the second armor layer. In another variation, the multilayer armor includes an outside armor layer, a composite layer underneath the outside armor layer that comprises a plurality of spheres, a second armor layer underneath the composite layer to provide a rigid support to the composite layer, and a third armor layer underneath the second armor layer. The second layer may comprise a composite material that includes a plurality of tightly nested layers in a self-assembling arrangement of spheres made of a high hardness material bonded together using a matrix.