A system and method are disclosed for producing nulls in a wideband jamming signal at specific frequency bands. A nulling signal is determined, either as a modification to one or more of the combined signals, or a separately determined nulling signal generated by combine a separate set of signals. The nulling signal is produced via feedback based on the output of the wideband jamming signal. Alternatively, a trained neural network outputs a nulling signal based on the wideband jamming signal and a desired availability band.

There are provided systems, devices and methods for detection and/or prevention of power line communications. In particular, there are provided systems, devices, and methods for preventing and/or detecting the possibility to communicate with an end unit via power line communication.

Systems, methods and apparatus are described for a HERF weapon that may emit high-energy radio waves at a target based on locational information and a frequency associated with the target. The HERF weapon may receive the frequency and locational information from a sensing system. The HERF weapon may emit a high energy pulse toward the target and on the frequency associated with the target to disable or destroy the target without affecting nearby devices. The HERF weapon may allow the user to avoid detection by using a frequency that corresponds to the target's operating frequency.

Described herein is a system for drone defense, comprising at least one jammer and at least one radio detector, wherein the jammer is set up to send an interference signal over a frequency range, and the radio detector is set up to detect a radio control signal of a drone, the frequency range of the interference signal comprises a carrier frequency of the radio control signal or a GPS signal, wherein the jammer is configured to temporarily interrupt the interference signal and the radio detector is configured to receive the interference signal, detect the interruptions and detect the radio control signal of the drone within the interruptions of the interference signal.

An information leakage prevention shield device includes a control unit to output a frequency setting signal for setting a filter frequency for an electromagnetic wave emitted from a device, and a modulation signal based on a time variation pattern for sequentially instructing a plurality of different transmission characteristics over time, and a dynamic electromagnetic-wave filter having a filter frequency set by a frequency setting signal from the control unit, having the plurality of different transmission characteristics over time set by the modulation signal from the control unit, to transmit an electromagnetic wave other than the filter frequency set by the frequency setting signal, and to have the plurality of different transmission characteristics over time set by the modulation signal with respect to the filter frequency set by the frequency setting signal.

A handheld countermeasure device is disclosed herein. The device can include a hand-held form factor body. The device can include disruption components, a directional antenna, and a processor. The disruption components can be configured to generate a disruptive signal. The directional antenna can be configured to emit the disruptive signal. The processor can be configured to determine a position of the handheld countermeasure device based on a global navigation satellite system (GNSS) signal. The processor can be configured to load a device profile for the handheld countermeasure device based on the position of the handheld countermeasure device.

A system for providing integrated detection and countermeasures against unmanned aerial vehicles include a detecting element, a location determining element and an interdiction element. The detecting element detects an unmanned aerial vehicle in flight in the region of, or approaching, a property, place, event or very important person. The location determining element determines the exact location of the unmanned aerial vehicle. The interdiction element can either direct the unmanned aerial vehicle away from the property, place, event or very important person in a non-destructive manner, or can cause disable the unmanned aerial vehicle in a destructive manner.

Apparatuses that provide for secure wireless communications between wireless devices under cover of one or more jamming signals. Each such apparatus includes at least one data antenna and at least one jamming antenna. During secure-communications operations, the apparatus transmits a data signal containing desired data via the at least one data antenna while also at least partially simultaneously transmitting a jamming signal via the at least one jamming antenna. When a target antenna of a target device is in close proximity to the data antenna and is closer to the data antenna than to the jamming antenna, the target device can successfully receive the desired data contained in the data signal because the data signal is sufficiently stronger than the jamming signal within a finite secure-communications envelope due to the Inverse Square Law of signal propagation. Various related methods and machine-executable instructions are also disclosed.

A method for inhibiting jammed signal use includes: receiving a desired signal wirelessly at a receiver; receiving an undesired signal wirelessly at the receiver, the undesired signal varying in strength over time; and inhibiting measurement of the desired signal, or use of a measurement of the desired signal, based on a determination that the undesired signal is a jamming signal based on a variation of the undesired signal being indicative of jamming.

A radio frequency (RF) jamming device includes a differential segmented aperture (DSA), a jammer source outputting a jamming signal at one or more frequencies or frequency bands to be jammed, and RF electronics that amplify and feed the jamming signal to the DSA so as to emit a jamming beam. The DSA includes an array of electrically conductive tapered projections, and the RF electronics comprise power splitters configured to split the jamming signal to aperture pixels of the DSA. The aperture pixels comprise pairs of electrically conductive tapered projections of the array of electrically conductive tapered projections. The RF electronics further comprise pixel power amplifiers, each connected to amplify the jamming signal fed to a single corresponding aperture pixel of the DSA. The RF jamming device may include a rifle-shaped housing, with the DSA mounted at a distal end of the barrel of the rifle-shaped housing.