Abstract: A nonplanar metamaterial polarizer includes: a substrate including dielectric material transmissive to electromagnetic radiation and having a nonplanar shape; a first conductive pattern on a first side of the substrate; and a second conductive pattern on a second side of the substrate. The first and second conductive patterns are configured to alter the polarization of the electromagnetic radiation as it transmits through the substrate. In some cases, the first and second conductive patterns include split-ring resonators, and the nonplanar shape is a cylinder. An antenna system includes the nonplanar metamaterial polarizer and an antenna inside or adjacent to the nonplanar metamaterial polarizer and configured to transmit or receive the electromagnetic radiation through the nonplanar metamaterial polarizer while the nonplanar metamaterial polarizer alters the polarization of the transmitted or received electromagnetic radiation.

Abstract: The system and method of detecting targets using a camera comprising narrow band filters in a compact pixel cluster arrangement. In some cases, the target is a chemical target. In some cases, the target is a naval target and the processing of the data provides extent, shape, direction and other characteristics that can provide details about the type of naval target even in dark or low light conditions.

Abstract: A multi-user system to simultaneously perform operations such as communication, RADAR, Light Detection and Ranging (LIDAR) and Relative Navigation (RELNAV). The techniques according to an embodiment includes generating a Fourier based orthogonal chirp sequence of length P, a prime number greater than the number of users targeted for communication. The orthogonal chirp sequence is based on an identifier, in the range of one to P?1, associated with one of the targeted users. The method further includes using the orthogonal chirp sequence to generate a spread user signal based on a message directed to the one targeted users. The method further includes generating a sequence of training pulses for insertion into the spread user signal to facilitate reception of the signal. The method further includes transmitting and receiving a reflection of the spread user signal from one of the targeted users, the reflection used to detect and range the user.

Abstract: A synthetic crystal oscillator enables a conventional crystal to be replaced with purely active electronic elements. Stability and performance characteristics are shown to be comparable-to-superior to a conventional crystal oscillator with side-by-side simulations. The synthetic crystal oscillator with purely active electronic elements offers cost, miniaturization and performance benefits. In some examples, the purely active electronic elements include an RLC circuit generate multiple stable concentric oscillations associated with nonlinear resonance used as an oscillator without a conventional crystalline structure coupled to the electrical circuit.

Abstract: A system and method of verifying hardware that includes software configured to control its operation, the method comprising providing an abstracted version of hardware to be tested; verifying the functionality of the hardware; writing test bench software using physical-layer routines; drafting hybrid verification intellectual property modules, wherein the hybrid verification intellectual property modules comprise both synthesizable and non-synthesizable code and are configured to stimulate the abstracted hardware and to test software anticipated to be used in connection therewith; and creating network-level routines that can be passed to physical-layer routines as part of a hardware verification process.

Abstract: A laser pointing apparatus and a method of calibration therefor utilizing a precision machined, highly reflective alignment cube to precisely calibrate the laser pointing system is provided. The calibration method can allow the calculation of the position of a transmitted beam after it leaves an azimuth mirror to high degree of accuracy over large distances.

Abstract: A system for transmitting a DMR disable signal to a target mobile radio device is provided. The system includes an antenna configured to transmit and receive messages and a base station comprising at least one computing device communicatively coupled to the antenna. The at least one computing device is configured to generate a first message to be transmitted to a target mobile radio device, the first message comprising a disable signal selected from a list of non-standard operational parameters that can be implemented by the target mobile radio device, cause transmission of the first message via the antenna to the target mobile radio device, and monitor incoming messages received via the antenna for an acknowledgement message from the target mobile radio device that the target mobile radio device has been disabled.

Abstract: Techniques are disclosed for multi-hop security amplification. The techniques disclosed provide multi-hop security amplification by applying a secret sharing scheme to data as the data is routed within a network to an intended recipient device. In an embodiment, a sending device divides the data into shares based on a secret sharing scheme, and sends the shares to respective network nodes in a network. These network nodes then divide their respective shares into lower-level shares based on the secret sharing scheme, and route the lower-level shares to downstream network nodes for further routing to the intended recipient device. The intended recipient device receives some or all of the lower-level shares and reconstructs the data from the received lower-level shares. In an embodiment, the secret sharing scheme is a threshold-based secret sharing scheme, such as Shamir's secret sharing scheme.

Abstract: Techniques are provided for geolocation of a radar emitting source. A methodology implementing the techniques according to an embodiment includes calculating time difference of arrival (TDOAs) of ground emitter radar pulses, within a dwell period, between two long baseline interferometer (LBI) antennas. The TDOA calculations are based on a precision estimate of the time of arrival of the radar pulses. The method further includes calculating an LBI phase wrap disambiguation factor based on (1) the TDOAs, (2) an average of frequencies of the radar pulses within the dwell period, and (3) an average of phase shifts of the radar pulses between the LBI antennas within the dwell period. The method further includes mapping a curve of points onto the surface of the earth based on an LBI cone angle calculation employing the LBI phase wrap disambiguation factor. The curve of points is associated with a geolocation of the ground emitter.

Abstract: A cybersecurity system and method utilizing SOUND reputation, where a set of reputations are associated with each actor on a network. The actors on a network may be users, hosts, applications, and the like. The associated reputations are aggregated and updated as new information about an actor's activity is reported according to a defined and modifiable protocol, or policy. The actor's activity may be reported by one or more threat sensors. The effect of a particular misbehavior can be tuned to match the needs of the specific network. When a bad actor's reputation sinks too low, the system can take whatever action is appropriate: reports can be sent, an operator can be notified, the offender can be cut off from the network, or the like.

Abstract: A power efficient (PE) amplifier includes a cascode amplifier, a transistor amplifier, and a voltage supply. The transistor amplifier includes at least one differential pair of transistors and a plurality of transformers having a primary winding and a tapped secondary winding. The secondary winding is connected across emitters or sources of each transistor pair. The tap of each secondary has a current source. The primary windings of the plurality of transformers are connected in series. The transistor bases or gates are alternating current (AC) grounded. The collector or drain terminal pairs are connected in parallel. The voltage supply is low voltage and supplies a current to the cascode amplifier. The PE amplifier further includes a plurality of current sources which provide a total current to the transistor amplifier. The PE amplifier has, among other things, improved power gain, improved reverse isolation, improved power dissipation, and improved peak differential swing.

Abstract: A method and system for a Wireless Resilient Routing Reconfiguration linear program or protocol (WR3LP). The WR3LP provides a routing protection scheme that is (i) congestion-free or reduced congestion under a wide range of failure scenarios in point-to-multipoint networks, (ii) efficient in terms of router processing overhead and memory requirement in wireless and point-to-multipoint networks, (iii) flexible in accommodating diverse performance requirements in wireless and point-to-multipoint networks (e.g., different traffic protection levels), and (iv) robust to traffic variations and topology failures in wireless and point-to-multipoint networks.

Abstract: A particle accelerator random number generator system comprises a particle accelerator, a particle event detector, and a processing application. Operation steps include initiating the particle accelerator; detecting a particle event by the particle event detector; recording a binary event from the detected particle event; determining if sufficient binary events have been recorded for the desired random number strength; if not, return to the step of detecting a particle event; if so, converting the random number binary string to a random number generated hexadecimal; applying the random number generated hexadecimal string for an encryption key; and using the random number hexadecimal key to encrypt an application.

Abstract: The present disclosure relates to tuning features for low profile high dielectric ceramic patch antenna. More particularly, the present disclosure relates to modifying a high dielectric ceramic patch antenna to compensate for variation within the dielectric constant. The disclosure relates to adding a tuning tab to a dielectric ceramic patch antenna with a high dielectric constant for operations at or near GPS tuning frequencies.

Abstract: An optical system including a first lens element having an optical center, a second lens element having an optical center spaced apart from the first lens element and oriented such that a beam passing through the optical center of said first lens element will also pass straight the optical center of the second lens element, the beam defining an optical path; and at least one planar, optical slab configured to be movable between at least two positions, a first position wherein at least a portion of a planar surface of the optical slab is disposed between the first and second lens elements such that a beam transmitted therethrough also passes through the planar, optical slab and a second position wherein the planar, optical slab is fully outside of the optical path created by the first and second lens elements.

Abstract: A system and method to aid in guidance, navigation and control of a guided projectile including a precision guidance munition assembly. The system and method receive position estimates of the guided projectile from a guiding sensor, determine predicted impact points of the guided projectile relative to a target based on the position estimates, determine miss distances of the guided projectile relative to the target, determine smoothed miss distances based, at least in part, on the determined miss distances, and process updated steering commands to steer the guided projectile based on the smoothed miss distances.

Abstract: The system and method for a low profile high gain dual polarization UHF/VHF antenna. In some cases a spiral antenna over a small cavity, with arms attached on either side is provided. The antenna structure is a short distance above a ground plane (e.g., less than 1/10 wavelength at the high frequency of operation). The arms are terminated to ground and the values of the terminations can vary depending on installation and the value chosen for the spiral termination. In some cases, the spiral antenna is not limited to a two arm spiral only as any type of spiral antenna may be used.

Abstract: Techniques and architecture are disclosed for a system that includes a fuze at a leading end of a projectile body and a fuze setter configured to engage the fuze and to program the same prior to launch. The system, in one example, includes a plurality of electrical contact pads on an exterior surface of a fuze radome housing and a plurality of electrical contact pins on the fuze setter. The electrical contact pads are arranged in a rotationally symmetric pattern that enables an electrical interface to be formed with the electrical contact pins, regardless of the rotational orientation of the fuze. Commutation is performed to rotate signals to the electrical contact pins instead of requiring that the fuze be physically rotated to bring the electrical contact pads into alignment with the electrical contact pins.

Abstract: A method for fabricating an integrated heat pipe is disclosed. The integrated heat pipe includes a porous wick structure, a solid conducting structure, and an integrated part. In a CAD model, the porous wick structure is represented as a simple solid having a finite amount of mechanical interference; the solid conducting structure and the integrated part are represented as simple solids. After incorporating the CAD model into a 3D-printer build file, 3D-printer parameters representing the porous wick structure of the integrated heat pipe are assigned to a porous region component model within the 3D-printer build file, and standard 3D-printer parameters representing the solid conducting structure and the integrated part are assigned to a solid region component model within the 3D-printer build file. The 3D-printer build file is utilized to print the integrated heat pipe on a 3D printer.

Abstract: A pressure relief valve having two rigid sealing surfaces lapped to a smoothness Ra of 8 micro-inches or less, and flatness within 80 micro-inches, forms a reliable seal by direct contact therebetween without an elastomer. The sealing surfaces and surrounding structures can be made of one or more metals, such as alloys of stainless steel, and can be CTE-matched, so that the valve is not impeded by environmental temperature changes. In a disclosed embodiment, a “poppet” is axially pressed against a seal plate by a spring. The poppet can be axially stabilized by sliding within a surrounding cylinder or spacer, and can contact the surrounding surface with a plurality of “arms” that reduce friction and enable gas flow therebetween. The poppet can be made from anti-galling Nitronic 60 alloy, and the surrounding structures can be stainless steel. Embodiments are suitable for low-pressure gas applications in extreme environments.