Abstract: A radio frequency (RF) bridge that may include a body having an interfacing surface and a bonding surface extending from the interfacing surface. RF bridge may also include an interconnect operably engaged with the body. The interconnect may have at least one electrical connection positioned at the interfacing surface and at least another electrical connection positioned at the interfacing surface adjacent with the at least one electrical connection. The interconnect extends curvilinearly between the at least one electrical connection and the at least another electrical connection creating a curvilinear signal path.

Abstract: A coaxial pad probe for coupling with a preexisting coaxial cable having a first end and a second end opposite to the first end and remote from an analyzing device. The coaxial pad probe includes a probe operably engaged with the second end of the preexisting coaxial cable. The probe is configured to directly contact a coaxial input/output (IO) connection provided on a mixed signal die or a coplanar IO connection provided on the mixed signal die for measuring an S-parameter measurement of the mixed signal die. The probe may include a support structure operably engaged with second end of the preexisting coaxial cable. The probe may also include a probe tip operably engaged with the support structure and configured to directly contact with the selected coaxial IO connection provided on the mixed signal die or the coplanar IO connection provided on the mixed signal die.

Abstract: A method of assessing the effectiveness of an electronic countermeasure (ECM) applied against an unknown, ambiguous, or unresponsive radar threat includes monitoring changes in a radar-associated factor while applying the ECM and determining if the ECM is disrupting the hostile radar. The radar-associated factor can be a weapon that is controlled by the radar threat, and assessing the ECM can include determining whether the weapon is misdirected due to applying the ECM. Or the radar-associated factor can be a feature of an RF waveform emitted by the radar threat, and assessing the ECM can include determining if the feature is changed due to applying the ECM. Continuous changes in the feature can indicate unsuccessful attempts to mitigate the ECM. Return of the feature to a pre-threat state can indicate disruption of the radar. The ECM can be selected from a library of countermeasures pre-verified as effective against known threats.

Abstract: Techniques are provided for jammer detection. A methodology implementing the techniques according to an embodiment includes estimating an angle of arrival of a jamming signal, the jamming signal included in a received signal, and generating a direction finding (DF) confidence indicator associated with the estimated angle of arrival. The method also includes extracting the jamming signal from the received signal. The method further includes correlating the extracted jamming signal with previously extracted jamming signals to generate a correlation score and using the correlation score as a uniqueness assessment of the extracted jamming signal. The method further includes identifying characteristics of the extracted jamming signal and generating a characterization confidence indicator. The method further includes demoting the extracted jamming signal to non-jammer status based on one or more of the DF confidence indicator, the uniqueness assessment, and the characterization confidence indicator.

Abstract: A replacement fin for an underwater vehicle includes a fin defining a socket that includes a bore of a first diameter and an internal spring recess of a larger diameter. A coil spring is retained in the spring recess and has coils of an elongated coil shape. The coil spring can occupy a first canted position in which the coils are canted in a direction generally into the bore and the coils can occupy a second canted position in which the coils are canted in a direction generally out of the bore. The UUV has a post that can include at least one circumferential recess configured to engage the coil spring, and which can function as a lock in some canted orientations of the spring. Alternately, the socket is defined in the UUV and the fin includes a post sized to be received in the socket.

Abstract: System and methods for generating super resolution images from geospatial images having any number of bands. A super resolution model, which uses deep convolution neural networks (DCNNs), is trained using individual image bands, a large crop size or tile size of 512×512 pixels, and a de-noise algorithm. Applying one or more algorithms to maintain the original color of the image bands improves the quality metrics of the super resolution images as measured by PSNR (peak signal-to-noise ratio) and SSIM (structural similarity index measure) of super resolution images. Further applying one or more algorithms to remove border effects introduced during the disclosed process reduces and/or eliminates seam lines between tiles and enhances the overall accuracy of the super resolution images.

Abstract: A system and method are disclosed for a precision variable-focus telescope that includes a telescope housing containing an optical system; a gap pad including a first side and a second side, wherein the first side of the gap pad is attached to the telescope housing; a heat spreader including a first side and a second side, wherein the heat spreader is contiguous with the telescope housing and wherein the second side of the heat spreader is attached to the second side of the gap pad; a temperature-sensing device connected to the first side of the heat spreader; and an electric-film heater including a first side and a second side, wherein the second side of the electric-film heater is attached to the first side of the heat spreader.

Abstract: A filter assembly of an optical system. The filter assembly may include a first spool, a second spool, and a film filter that operably engages with the first spool and the second spool and the film filter having at least two filters that are different from one another. The filter assembly may also include a drive assembly that operably engages with one of the first spool, the second spool, and the film filter for moving at least one filter of the at least two filters into optical alignment with a focal plane sensor of the optical system. The film filter of the filter assembly may also be made from a flexible material that bends when wound about the first spool and the second spool.

Abstract: Techniques are provided for a broadband microwave/millimeter-wave balanced-to-unbalanced transformer (balun). A balun implementing the techniques according to an embodiment includes a first impedance matching network configured to reduce insertion and return losses of a single-ended signal at a first port of the balun. The balun also includes a first planar bifilar coupled transmission line coupled to the first impedance matching network and configured to transform the single-ended signal into a differential signal. The balun further includes a second planar bifilar coupled transmission line coupled to the first bifilar coupled transmission line and configured to compensate for amplitude and phase imbalance induced on the differential signal by the first bifilar coupled transmission line.

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: A dynamic controlling framework that is adapted to dynamically optimize existing routing decisions in an optimized link state routing (OLSR) platform to favor higher-bandwidth, lower-latency links in the active link database. The dynamic controlling framework includes a link probing tool that is in communication with OLSR platform where the link probing tool is adapted to dynamically measure estimated bandwidth, latency scores, or both estimated bandwidth and latency scores of active links in the active link database of the OLSR platform. The dynamic controlling framework includes a plug-in framework that is in communication with the OLSR platform and the link probing tool where the plugin framework is adapted to receive at least one link quality multiplier (LQM) metric computed by the link probing tool and to combine the at least one LQM metric with the OLSR platform's existing link quality (LQ) metric for enhancing route selection by the OLSR platform.

Abstract: A laser canard test system (LCTS) that includes a test bench assembly, at least one laser controller operably engaged with the test bench assembly, at least one laser sensor device operably engaged with the test bench assembly and in electrical communication with the at least one laser controller, and a canard testing protocol in logical communication with the at least one laser controller and the at least one laser sensor device to enable the at least one laser controller to command the at least one laser device to measure at least one canard on a payload free from contacting the at least one canard of the payload.

Abstract: An antenna calibration system and method utilizes both computer electromagnetic modeling and actual test fixture measurements for calibrating the antenna or multiple antennas in an array. Use of the test fixture measurements enables the calibration technique to account for design nuances or imperfections in each respective antenna to enable that particular antenna to be more accurately modeled for calibration without having to physically maneuver the platform to calibrate the antenna that is to be installed thereon. Use of computer electromagnetic modeling techniques then account for these design nuances or imperfections to provide improved modeling for calibrating the antenna on a platform prior to moving the platform with the antennas on the platform.

Abstract: An active infrared system may include at least one metamaterial optical element. The active infrared system may also include at least one lens assembly optically aligned with the at least one metamaterial optical element. The active infrared system may also include at least one active camera optically aligned with the at least one metamaterial optical element. The at least one metamaterial optical element of the active infrared system may also be configured with at least a reflection mode for reflecting at least one light waveband reflected by a remote object and a transmission mode for transmitting a uniform background light that is wider than the at least one light waveband reflected by the remote object.

Abstract: Flash peripheral device may include a kernel in logical communication with a bootloader where the kernel, when initialized, is adapted to upload in at least one hardware controller via the bootloader. Flash peripheral device may also include at least one firmware protocol in logical communication with the kernel and configured to initialize at least one hardware driver of the at least one hardware controller. Flash peripheral device may also include an operation application in logical communication with the kernel and provided with a legacy set of instructions and at least one updated set of instructions. The operation application executes and runs the at least one updated set of instructions when the at least one updated set of instructions is flashed to the operation application or executes and runs the legacy set of instructions when the at least one updated set of instructions fails to be flashed to the operation application.

Abstract: An apparatus for dampening at least one optical instrument on a military platform. The apparatus includes a plate adapted to hold at least one optical instrument. The apparatus also includes at least one dampening assembly having a first end operably engaged with the plate and an opposing second end operably engaged with a platform. The at least one dampening assembly is also adapted to reduce the movement of the plate and optical device from a ballistic event created by a ballistic device on the platform.

Abstract: A feature detection system, the system comprising: at least one processor in operative communication with a signal source, said processor further comprising at least one non-transitory storage medium, wherein at least one non-transitory storage medium contains instructions configured to cause the processor to: apply a joint group sparse denoising and delay estimation approach to a signal received from said signal source; and output statistics regarding the signal, wherein the joint group sparse denoising and delay estimation approach comprises; using the following equation: { x * , ? * } = argmin x , ? ? { 1 2 ? ? j = 1 M ? y j - x ? 2 2 + ? i = 0 N ? i ? ? i ( D i l i ? x ) } where: ?i are regularization functions; ?y?x?22 is a data-fidelity term and, in embodiments, is chosen as the least-square term; li are real numbers; Di are operators, which may be linear filters that can be written in matrix form; ?i are regularization parameters; and x*

Abstract: Techniques are disclosed for transmitting a secure message over a public or untrusted network. The techniques include receiving a message and creating multiple hash values of the message. A sending device signs and encrypts the message and hash values, then encapsulates and transmits to the message and hash values a security server. The security server receives and de-encapsulates the message and hash values, decrypts the message and hash values, and verifies the signature. The security server verifies the hash values and determines whether any changes were made to the message during transmission. If verified, the security server processes the message for transmission to the recipient. The security server creates multiple hash values of the original message, signs and encrypts the message and the hash values, encapsulates the message and hash values and transmits to a recipient device for further verification and presentation to the recipient.

Abstract: A transceiver having a down-converter for converting a radio-frequency (RF) input signal to an intermediate frequency (IF) signal with an analog low latency bypass path coupled to the IF signal and configured to provide a low latency IF signal and an up-converter for converting an IF signal to an RF signal. There is a digital path coupled to the IF signal and configured to provide a digitally processed IF signal, and an up-converter for converting at least one of the low latency IF signal and the digitally processed IF signal to an RF output signal. In a further example, the down-converter and the up-converter convert to millimeter wave frequencies and filters the millimeter wave frequencies with cavity filters.

Abstract: The present disclosure relates to a chaff dispensing system that is provided on an aircraft. The chaff dispensing system includes a container, a dispensing assembly, a controller, and a volume of chaff material. The container has a first end, a second end, and a chamber that extends between the first and second ends, and the second end defines an ejection port. The dispensing assembly is provided on the aircraft, and the dispensing assembly is operably engaged to the container. The controller is electrically connected to the dispensing assembly. The volume of chaff material is disposed inside the chamber of the container. The volume of chaff material is dispensed by the dispensing assembly operably through the controller in metered volumes of chaff material. In addition, a first volume of chaff material may be metered at a first time and a second volume chaff material may be metered at a second time in which the second volume of chaff material is different than the first volume of chaff material.