Abstract: An electromagnetic splitting coupler is provided for receiving a transverse electromagnetic (TEM) signal input and emitting a transverse electric mode one-zero (TE10) signal output. The coupler includes a receiver port; a plurality of emitter ports; a hollow manifold; and a terminus. The receiver port provides the TEM signal input. The emitter ports impart the TE10 signal output. The manifold includes a chamber that connects the receiver port to the emitter ports. The terminus seals the manifold. The coupler can also include an interface plate to connect the emitter ports thereto, such as to an antenna.

Abstract: A system comprises a radar altimeter that produces range-to-ground measurements; an aided INS or AHRS that produces vertical acceleration, roll, and pitch measurements; an air data system that produces barometric altitude measurements; and a processor including a BIV hybrid filter, and a RAIV hybrid filter set. The BIV hybrid filter receives the vertical acceleration measurements and the barometric altitude measurements. The RAIV hybrid filter set receives input measurements comprising the vertical acceleration, roll, and pitch measurements, BIV hybrid filter statistics, and the range-to-ground measurements. The RAIV hybrid filter set comprises a plurality of hybrid filters that operate in parallel with each other in respective filter slots. A hybrid filter in each filter slot operates on partially overlapping, time limited staggered intervals of the input measurements, with respect to other hybrid filters in other filter slots.

Abstract: Techniques are disclosed for providing at least one proposed alternative plan of travel of a vehicle are disclosed based upon data of at least one geographic region about at least one of global navigation satellite system (GNSS) spoofing and GNSS jamming. If a current path of travel of the vehicle intersects at least one geographic region of at least one of GNSS spoofing and GNSS jamming, then determining the at least one proposed alternative plan of travel of the vehicle. At least one of the at least one proposed alternative plan of travel includes a path of travel that does not intersect at least one geographic region of the at least one geographic region of at least one of GNSS spoofing and GNSS jamming. The determined at least one proposed alternative plan of travel is sent to the vehicle.

Abstract: Flange for a vacuum apparatus comprises a housing to be connected to the vacuum apparatus defining an opening wherein the opening has rectangular narrow shape. The flange further comprises a metal seal arranged around the opening to create a vacuum tight seal.

Abstract: A slotted waveguide array (SWA) antenna is provided for emitting electromagnetic radiation. The antenna includes a base, a pair of brackets, a pair of spars, a plurality of waveguides, and a radome. The base provides longitudinal and lateral support for the antenna on a platform. The brackets are disposed at longitudinally opposite ends on the base. The spars connect the brackets and are disposed at laterally opposite ends of the base. The waveguides are disposed in stagger array. Each waveguide has a pair of broad walls and a pair of side walls that share longitudinal edges. The broad wall is wider than the side wall. The broad wall includes elliptical slots penetrating each waveguide. The stagger array arranges first and second waveguides share respective first and second longitudinal edges. The radome covers the waveguides and connects to the pair of spars.

Abstract: A capacitively or inductively driven spiral antenna creates an electric current distribution of a dipole, which generates a sensible magnetic field for various military applications including detecting and pre-detonating improvised explosive devices (IEDs). The antenna includes a dielectric substrate, a spiral antenna, driving elements such as tuning forks or loop, and a coaxial cable that connects to a source terminal. The substrate is a low dielectric loss insulating material to provide support for the antenna. The spiral antenna is tuned to a natural frequency is disposed on the substrate. The coaxial cable extends from the substrate to the source terminal.

Abstract: Techniques are disclosed for providing at least one proposed alternative plan of travel of a vehicle are disclosed based upon data of at least one geographic region about at least one of global navigation satellite system (GNSS) spoofing and GNSS jamming. If a current path of travel of the vehicle intersects at least one geographic region of at least one of GNSS spoofing and GNSS jamming, then determining the at least one proposed alternative plan of travel of the vehicle. At least one of the at least one proposed alternative plan of travel includes a path of travel that does not intersect at least one geographic region of the at least one geographic region of at least one of GNSS spoofing and GNSS jamming. The determined at least one proposed alternative plan of travel is sent to the vehicle.

Abstract: Flange for a vacuum apparatus comprises a housing to be connected to the vacuum apparatus defining an opening wherein the opening has rectangular narrow shape. The flange further comprises a metal seal arranged around the opening to create a vacuum tight seal.

Abstract: A fairing configured to be positioned on a roof of a vehicle. The fairing has a forward end and a rearward end. The fairing comprises a flow controlling outer body defining a central forward opening. The fairing includes at least one actuatable panel movably coupled to the flow controlling outer body and a central body aligned with the central forward opening of the flow controlling outer body. At least one air channel open to the central forward opening that extends between the at least one actuatable panel and the central body. The fairing includes at least one actuator configured to move the at least one actuatable panel through a plurality of positions to direct an air flow along at least one of 1) the at least one air channel and 2) an outboard side of the at least one actuatable panel.

Abstract: Devices and techniques are generally described for a doorbell camera circuit architecture. In some examples, at least one processor of a doorbell device may generate a first control signal. The at least one processor may send the first control signal to a power-switching control circuit of the doorbell device. The power-switching control circuit may receive a first input electrical signal. The power-switching control circuit may store at least a portion of energy associated with the first input electrical signal in a plurality of capacitors of the power-switching control circuit. The power-switching control circuit may supply power from the plurality of capacitors to a camera of the doorbell device during a first state of the control signal. In various examples, the power-switching control circuit may supply power from the battery to the camera of the doorbell device during a second state of the control signal.

Abstract: Techniques are generally described for motion detection by supplying voltage pulses to a radio frequency (RF) circuit. In some examples, an RF motion detection circuit may output a first RF signal based at least in part on a first voltage pulse. In some further examples, the RF motion detection circuit may receive a second RF signal, the second RF signal being the first RF signal reflected from an environment external to the RF motion detection circuit. In some further examples, the first RF signal and the second RF signal may be mixed to generate a difference component signal. A first output voltage representing the difference component signal may be generated. In some examples, the first output voltage may be used to detect motion in the environment.

Abstract: A vehicle disturbance and isolation detection system is provided. The system includes at least one measurement sensor that is configured to generate measurement signals, at least one filter that is used to sort disturbance causes in the measured signals by frequencies, at least one controller that is used to compare the sorted signal to at least one threshold to determine if an event has occurred, a memory to store at least operating instructions for the at least one controller, a controller that is in communication with the memory and a communication system that is in communication with the at least one controller. The communication system is configured to transmit determined events to a remote location.

Abstract: Techniques are generally described for controlling a camera to capture video based on one or more auxiliary motion sensors. First data indicative of motion may be received from a first motion sensor at a camera. In some examples, the first motion sensor may have a first field-of-view. Second data indicative of motion may be received from a second motion sensor at the camera device. In some examples, the second motion sensor may have a second field-of-view different than the first field-of-view. A determination may be made that the first data temporally corresponds to the second data. In some examples, an image sensor of the camera may capture first image data in response to the first data indicative of motion and the second data indicative of motion.

Abstract: A fairing configured to be positioned on a roof of a vehicle. The fairing has a forward end and a rearward end. The fairing comprises a flow controlling outer body defining a central forward opening. The fairing includes at least one actuatable panel movably coupled to the flow controlling outer body and a central body aligned with the central forward opening of the flow controlling outer body. At least one air channel open to the central forward opening that extends between the at least one actuatable panel and the central body. The fairing includes at least one actuator configured to move the at least one actuatable panel through a plurality of positions to direct an air flow along at least one of 1) the at least one air channel and 2) an outboard side of the at least one actuatable panel.

Abstract: Disclosed is a roof fairing for a vehicle, such as a truck hauling a trailer. The roof fairing includes a body defining a flow directing exterior surface. The body including at least one flow directing channel that is sunk into the body toward an inner space defined by an interior surface of the body. The flow directing channel comprises a venturi construction terminating at the trailing edge. The venturi construction is configured to direct flow toward an exterior surface of the trailer when coupled to the truck.