Abstract: A circuit includes (i) an input terminal for receiving a single-ended input signal; (ii) an operational amplifier (op-amp) comprising an inverting input, a non-inverting input, and an op-amp output; (iii) a capacitor coupled between the inverting input and the op-amp output; (iv) a first resistor coupled between the inverting input and the input terminal; and (v) a second resistor coupled between the non-inverting input and the input terminal. In an example, a phase locked loop (PLL) includes the circuit, and a voltage controlled oscillator (VCO) is coupled to the output of the operational amplifier.

Abstract: A signal transmission or processing assembly having a coaxial through-via within a substrate is provided. The substrate may be formed from a material that is a glass-like with an amorphous non-crystalline structure that enables the assembly to create or be created by a deep trepan or annular member that surrounds the center conductor. Methods of manufacture are employed or exploited to preserve the glass-like or other dielectric material structure of substrate to form the inner material or annular member that surrounds the center conductor or pair of center conductors.

Abstract: An underwater sensing system includes a cable structure, a water surface mount coupled to the cable structure, and a processor. The cable structure is configured to be deployed in a vertical orientation underwater and includes one or more sensors along a length of the cable structure. The one or more sensors are configured to detect maritime data associated with one or more marine-based parameters in an underwater maritime region around the cable structure. The water surface mount is configured to be at least partially exposed above a surface of the underwater maritime region and includes a transmitter configured to transmit the maritime data. The processor is configured to access a maritime model comprising parameters associated with the maritime region and update the maritime model based on the maritime data. The maritime model can be used as an input, or otherwise made accessible, to a navigation system of an underwater vehicle.

Abstract: A radio frequency device includes an optically transparent, electrically insulating substrate; a plurality of optically transparent, electrically conductive cells disposed on the substrate; a thin film transistor electrically coupled between an optically transparent electrode of a first one of the cells and an optically transparent electrode of a second one of the cells; and an optically transparent conductive control trace electrically coupled to a control terminal of the transistor. In an example, at least one of the cells is a transparent conductive oxide thin film. Electrodes of the transistor may also be optically transparent.

Abstract: Techniques are provided for geolocation and tracking of a target emitter. A methodology implementing the techniques according to an embodiment includes receiving measurement data associated with a signal from an emitter, and receiving an estimated uncertainty associated with the measurement data. The measurement data may be provided, for example, by a radar receiver. The method further includes employing a Kalman filter to calculate a geolocation of the emitter, based on the measurement data and the estimated uncertainty. The calculation includes constraining the geolocation of the emitter to the surface of the Earth, for example in a geodetic coordinate system. The measurement data may include azimuth angle of arrival of the signal and depression angle of arrival of the signal or a time difference of arrival of the signal between two measurement platforms. The methodology may be carried out, for instance, onboard an aircraft, projectile, or missile.

Abstract: A method is disclosed of efficiently synchronizing time bases of multi-netting network nodes. A first node transmits a synchronizing request on a subnet associated with the highest time quality in its source table, then simultaneously monitors that subnet and up to three additional subnets associated with lower time qualities in its source table. If the first node does not receive a response, it transmits the request on the subnet associated with the next highest time quality in its source table. A second node simultaneously monitors the subnet associated with its time quality and a plurality of subnets associate with consecutively higher time qualities. Upon receiving the synchronization request, it responds on the subnet associated with its time quality. The disclosed method is fully compatible with networks that include single-netting nodes, and can be implemented by a JTRS node exchanging RTT messages on a Link 16 network.

Abstract: Techniques are provided for steering vector generation. A methodology implementing the techniques according to an embodiment includes converting time domain data received from an antenna array to channelized frequency domain data. The method also includes receiving a request from a signal detection system, the request including a timestamp and duration of a detected signal of interest (SOI) and an indication that the SOI is pulsed or continuous. The method further includes generating, for a pulsed SOI, steering vectors to steer the antenna array to the pulsed SOI based on a segment of the time domain data stored in a first memory and identified by the time stamp and duration; and generating, for a continuous SOI, steering vectors to steer the antenna array to the continuous SOI based on a segment of the channelized frequency domain data stored in a second memory and identified by the time stamp and duration.

Abstract: Systems, methods and computer systems for the automatic determination of presence or absence of burn-in overlay data are provided. The systems, methods, and computer systems implement mask generation, edge detection, feature vector generation methods that are combined with machine learning classifiers to rapidly and automatically determine the presence or absence of burn-in overlays in the image for the purpose of removal or other forms to obfuscate burn-in overlay data so as to maintain confidential or classified information while allowing for the release of remaining image data.

Abstract: Techniques are provided for design verification of a bit spreading memory. A methodology implementing the techniques according to an embodiment includes using a bit spreading geometry file to convert a logical address of the memory to a physical address. The geometry file defines a scheme by which bits of a data word stored at the logical address are spread over multiple RAMs. The method also includes writing data bits of a test data word to the physical address, causing a design simulator to simulate a read from the logical address, and comparing the result to the test data word for verification. The method further includes causing the design simulator to simulate a write of the test data word to the logical address, reading data bits from the physical address, arranging the bits into a retrieved data word, and comparing the test data word to the retrieved data word for verification.

Abstract: A switch assembly and a method of effecting a battery to initiate. The switch assembly includes a support that is adapted to operably engage with a battery. The switch assembly also include a slide operably engaged with the support and moveable in a first direction relative to the support between a primed position and a released position. The switch assembly also includes a cover operably engaged with the support and enclosing the slide. The switch assembly also includes a firing pin mechanism operably engaged with the support, the slide, and the cover and moveable in a second direction relative to the slide and the support. In the switch assembly, the second direction of the firing pin mechanism is different than the first direction of the slide.

Abstract: An apparatus for converting frequency of signals includes a first switch having a first input terminal to receive a first input signal, a first output terminal, and a second output terminal, wherein the first switch couples the first input terminal to either the first or the second output terminal. A mixer circuit is coupled to the second output terminal, and is to mix the first input signal to a second input signal, to generate a modified input signal. A filter circuit includes a plurality of programmable filters, to receive the modified input signal and output a filtered signal. A second switch has (i) a second input terminal coupled to the first output terminal, (ii) a third input terminal to receive the filtered signal, and (iii) a third output terminal, wherein the second switch is to couple the third output terminal to either the second or third input terminal.

Abstract: A feed forward guidance kit for a ballistic device that includes at least one optical imaging sensor, a processor that is operatively in communication with the at least one optical imaging sensor, and a feed forward guidance protocol that is stored on a computer readable medium and that is operatively in communication with the processor. When the at least one optical imaging sensor initially intercepts an aircraft at an initial location during combat, the feed forward guidance protocol instructs the processor to proactively calculate an anticipated second position of the aircraft as an orientation of the aircraft changes from an initial orientation to a translated orientation.

Abstract: A computer program product interacts with machine-readable mediums with instructions for automated target recognition. It captures a video of a specified region using detectors on a vehicle. Raw image frames from the video undergo pre-processing, followed by feeding through long and short-range target detection pipelines. Image frames are downscaled in the short-range pipeline, generating image windows and applying a trained convolutional neural network (CNN). Full resolution and non-redundant image chips are created. Detection region of interest (ROI) proposal lists are generated and analyzed with the CNN, producing frame detection lists with detected targets. These lists are stacked and processed using a multi-target Kalman filter, ultimately creating a track list of targets for monitoring.

Abstract: The system and method described herein utilizes spectral data, spatial data, and temporal data, simultaneously, to provide an improved clutter suppression technique to provide an improved output for feeding into an object detection protocol. This clutter suppression technique that uses spectral data, spatial data, and temporal data, simultaneously, results in improved processing capabilities by reducing the amount of processing power needed to obtain the resultant output. The present disclosure utilizes particular protocols and processes to effectuate the usage and processing of spectral data, spatial data, and temporal data, simultaneously.

Abstract: An antenna element suited for direction finding (DF) with omni-directional radiation patterns utilizing a pair of chevron slots fed using a ridged waveguide magic tee (magic-t) and connected microstrip probes. The provided antenna element provides improved performance, power handling, and improved bandwidth compared to current monocone and/or slot antenna elements. The antenna element may be further realized utilizing additive manufacturing processes in combination with standard metal and polymer production techniques.

Abstract: A chassis configured to hold a cards of at least two form factors comprising: slots disposed in an inner portion the chassis, wherein the slots are aligned with one another and configured to act as card guides; a mid-height structure disposed adjacent a side wall of the chassis, the mid-height structure comprising a second plurality of slots and a third plurality of slots disposed on top and bottom surfaces of the mid-height structure that are substantially parallel to top and bottom walls of the chassis; and a plurality of cooling channels disposed within the walls of the chassis as well as within the mid-height structure, wherein the second and third plurality of slots are configured to align with at least a subset of the plurality of slots disposed in the top and bottom chassis walls and to act as card guides.

Abstract: A guided vehicle that includes a body, a propulsion system operably engaged inside of the body, a housing operably engaged with the body and encasing a guidance device inside of the housing, a viewing window of the guidance device, and a cover moveably engaged with the housing, wherein the cover is moveable between a pre-flight configuration and a flight configuration. In the pre-flight configuration, the cover covers the viewing window. In the flight configuration, the cover is configured to expose the viewing window in the flight configuration in response to an impulse of acceleration generated by a launch of the guided vehicle.

Abstract: Various countermeasure dispensing systems (or CMDSs) and method of use are described herein. CMDS may include a dispenser assembly operably engaged with a platform where at least one electrical connection provides electrical communication between the dispenser assembly and a sequencer. CMDS may also include a magazine assembly operably engaged with the dispenser assembly, wherein the magazine assembly comprises a magazine configured to hold at least two countermeasure expendables. CMDS may also include a breechplate assembly operably engaged with the magazine assembly and adapted to dispense the at least two countermeasure expendables. CMDS may also include at least one magazine identification switch (MIS) operably engaged with the magazine assembly and the breechplate assembly. CMDS may also include that the at least one MIS is configured to enable the sequencer and the breechplate assembly to selectively dispense at least one countermeasure expendable from the at least two countermeasure expendables.

Abstract: Various systems and methods for leveraging legacy countermeasure dispensing systems (CMDSs). The legacy CMDSs are leveraged through the expansion of breechplates and magazines in a CMDS by expanding the amount of expendables carried by a CMDS while still maintaining the legacy sequencer and dispenser in a legacy military platform, such as an aircraft. In addition, various circuitry systems are included in a circuit card of the breechplate for duplicating and/or expanding the firing lines provided in a legacy CMDS.

Abstract: A sample and hold amplifier output buffer with the low leakage of metal oxide semiconductor field effect transistors (MOSFET) combined with the linearity and dynamic range of silicon-germanium (SiGe) bipolar junction transistors (BJT). In one aspect, the present disclosure provides a sample and hold amplifier output buffer placing a MOSFET input device between the base and emitter of a high linearity SiGe BJT.