Abstract: Methods, systems, and devices for monitoring a Real Time Clock (RTC) oscillator using Digital Signal Processing (DSP), where a resistance/capacitance (RC) oscillator is configured to output a digital pulse signal and a digital RTC Monitor Integrated Circuit (IC) is configured to monitor the RTC oscillator timing signal using the RC oscillator signal. In one aspect, the RTC Monitor IC includes an RTC input configured to receive the RTC oscillator timing signal; an RC input configured to receive the RC oscillator digital pulse signal; and an RTC reset output configured to output an RTC reset signal when a comparison of the RTC and RC oscillator inputs show the RTC oscillator has missed one or more clock cycles. A single wire input/output for both reset and interrupt signals between circuits is also described.

Abstract: A distributed feeding circuit for antenna beamforming array comprises a plurality N of inputs and a plurality N of outputs, wherein the said circuit is adapted for receiving, on at least one input, an electrical signal at a microwave frequency, modulated on at least one optical carrier, the circuit comprising at least one assembly of at least two optical dividers, two delay lines of length zero or substantially equal to a fraction of the wavelength of the signal at its microwave frequency and two means for combining two optical signals, the assembly being arranged and the delay lines being configured so that the theoretical transfer function of the circuit is an orthogonal matrix.

Abstract: A vehicle-based radio frequency (RF) hardware component comprises first and second antennas, a digitizer, a serializer, and a serial output. The first antenna receives, over-the-air, a first analog Global Navigation Satellite System (GNSS) signal in a first frequency band. The second antenna receives, over-the-air, at least a second analog GNSS signal in a second frequency band, wherein the first frequency band and the second frequency band are separate and distinct. The digitizer digitizes the first analog GNSS signal into a first digitalized GNSS signal and digitizes the second analog GNSS signal into a second digitized GNSS signal. The serializer serializes the digitized GNSS signals into a serialized output signal. The serial output communicatively couples the digitized GNSS signals, as the serialized output signal, directly from a location in a vehicle of the radio frequency hardware component to a separate communication device that is also coupled with the vehicle.

Abstract: An antenna assembly may include a first ground plane, a second ground plane that may be switched between grounding and non-grounding states, and first and second antenna layers. Each of the first and second antenna layers may include a plurality of pixels interconnected by a plurality of phase change material (PCM) switches. The PCM switches are configured to be selectively switched between phases to provide a plurality of antenna patterns within the first and second antenna layers.

Abstract: Provided herein is a compact and economical direction finding antenna using a mono-pulse antenna system, where a plurality of antenna elements are disposed in a circular array. The directional antennas may be formed by any type of antenna element, including a patch or reflector. The antenna beams of the directional antenna elements overlap, so that from any azimuthal direction, the point is covered by more than one antenna beam. Signals from each pair of adjacent antenna elements of the circular array are processed in order to determine the angle of arrival of a received signal.

Abstract: An aircraft traffic system is provided that includes a primary antenna operable to generate interrogation signals and receive interrogation replies from other aircraft. The system additionally includes a secondary antenna configured as a tuned absorber having a matched impedance to at least partially absorb reflections of the interrogation signals or interrogation replies utilized by the primary antenna.

Abstract: A radar system. The radar system may include a housing having a base for mounting on a marine vessel. The radar system may include a radar disposed inside the housing. The radar system may include an antenna coupled to the radar. The radar system may also include a lighting system having a light source, and where a portion of the lighting system is disposed inside the housing. The radar system may include a controller coupled to the lighting system.

Abstract: Nuclear reactor systems and methods are described having many unique features tailored to address the special conditions and needs of emerging markets. The fast neutron spectrum nuclear reactor system may include a reactor having a reactor tank. A reactor core may be located within the reactor tank. The reactor core may include a fuel column of metal or cermet fuel using liquid sodium as a heat transfer medium. A pump may circulate the liquid sodium through a heat exchanger. The system may include a balance of plant with no nuclear safety function. The reactor may be modular, and may produce approximately 100 MWe.

Abstract: Ground stations 20, 21 receive any signal transmitted by a geostationary artificial satellite 10, and store the reception signal together with the reception time thereof. A difference ?t in reception time of a same signal between the ground station 20 and the ground station 21 is calculated by performing correlation processing of the reception signal of the ground station 20 and the reception signal of the ground station 21. A distance R20 between the ground station 20 and the geostationary artificial satellite 10 is measured by a distance measurement device. A distance R21 between the ground station 21 and the geostationary artificial satellite 10 is calculated on the basis of the distance R20 obtained by measurement and the difference ?t in reception times, as obtained by correlation processing.

Abstract: Various embodiments described herein are directed to methods and systems for multibeam adaptive antenna architectures for recovering user signals in the coverage area of the antenna in the presence of interference sources. For example, various embodiments may utilize an architecture comprised of an array of antenna feeds, an RF to baseband conversion subsystem, a bank of digital beamformers, a channelization subsystem, a bank of weighted combiners, and a bank of demodulators for the demodulation and detection of user signals. The multiple beamformers introduce nulls in the direction of interference sources based on distinct adaptive algorithms for providing different antenna beam patterns after adaptation. Various other embodiments may utilize architecture for providing the directions of the interference sources or intentional jammers.

Abstract: This invention relates to devices and processes for geophysical prospecting, subsurface fluid monitoring and, more particular, to the use of interferometric techniques using Control Source Electromagnetic (“CSEM”) and Magnetoturelic (“MT”) signals to create images of sub-surface structures and fluids.

Abstract: A technology is provided for reducing pulsed radio frequency interference. The GPS signal may be received at a GPS device. The GPS device may include a GPS receiver. The GPS signal may include a plurality of sign and magnitude bits. Pulsed RFI may be detected in the GPS signal based on samples of the magnitude bits in the GPS signal. The pulsed RFI received at the GPS receiver may be reduced by communicating a blank signal when the samples of the magnitude bits indicate the pulsed RFI.

Abstract: The present invention relates to a method for determining a direction to a signal-emitting object by means of a platform comprising at least two antennas separated by a known distance. The method comprises said steps of: receiving, with each of said at least two antennas, a signal from said signal-emitting object at first positions, determining a first phase relation of said signal between said at least two antennas, —receiving, with each of said at least two antennas, a signal from said signal-emitting object at at least second positions, determining at least a second phase relation of said signal between said at least two antennas, characterized by the steps of: determining change(s) in position(s) of at least one antenna of said at least two antennas, and determining a direction to a signal-emitting object based on said first phase relation, said at least second phase relation and said change(s) in position(s) of said at least one antenna.

Abstract: Signals are maintained to be in phase at beam input ports of a Rotman lens antenna, and thus scanning at non-step antenna beam angles can be realized without increasing the number of input beams. The present invention provides an antenna beam scan module including: a Rotman lens that has plural beam ports and plural antenna ports; plural antenna elements; relative phase detectors that detect a relative phase difference between the signals input to the adjacent beam ports; phase shifters that offset the relative phase difference between the signals supplied to the adjacent beam ports on the basis of the relative phase difference detected by the relative phase detectors; and switches that select routes of the signals supplied to the beam ports through variable amplifiers, wherein the phase shifters are arranged on alternate routes through which the signals are supplied to the plural beam ports.

Abstract: Various exemplary embodiments relate to a radar device for detecting objects that intersect an area, the device including a mount attachment; a radar sensor; an output interface; a memory storing one or more environment parameters; a processor in communication with the radar sensor, the output interface, and the memory, the processor being configured to: receive, from the radar sensor, signal information; retrieve, from the memory, environment parameters; calculate, based on the signal information, the distance relative to the sensor of one or more objects; calculate an area based on at least one of the environment parameters; and determine that at least one of the one or more objects intersect the area.

Abstract: A radio frequency coupling structure is arranged to couple a radio frequency signal between a first side of the radio frequency coupling structure to a second side of the radio frequency coupling structure opposite to the first side. The radio frequency coupling structure comprises a dielectric layer, a first electrically conductive layer comprising a first transition structure, a second electrically conductive layer comprising a second transition structure, and an integrated waveguide structure formed by an array of electrically conductive vias extending through the dielectric layer from the first to the second electrically conductive layer to enclose a portion of the dielectric layer. The portion is arranged to guide the radio frequency signal between the first transition structure and the second transition structure.

Abstract: A GNSS receiver configured to detect a presence of at least one GNSS satellite signal in a received signal is provided. The GNSS receiver includes a buffer loaded with sample sets corresponding to the received signal and a Doppler derotation block configured to perform a Doppler derotation corresponding to at least one Doppler frequency on a sample set received from the buffer. The GNSS receiver further includes an accumulator block configured to perform a coherent accumulation of a plurality of sample sets upon or subsequent to the Doppler derotation corresponding to a Doppler frequency, and, a first memory configured to store the results of the coherent accumulation. A register array is configured to be loaded with the results stored in the first memory and a correlator engine is configured to generate correlation results by correlating the results in the register array with a plurality of code phases of GNSS satellites.

Abstract: In an installation including first and second components, a radar sensor that has at least two channels, each arranged to be spatially at a distance from the other, is motion-coupled to the first component, and at least two coding radar targets, each arranged to be spatially at a distance from an adjacent target, are motion-coupled to the second component. A signal is sent to each of the radar targets using one of the at least two channels of the radar sensor. At least one coded signal is respectively sent by the radar targets upon or after receiving such a signal, one of the at least two coded signals being received by one or more channels of the radar sensor from each target. The temporal relationship between at least two of the received coded signals is acquired and used to determine an angle between the first and second components.

Abstract: Embodiments provide for a positioning device comprising a global navigation satellite system (GNSS) receiving unit, a communication antenna and a communication module. The GNSS receiving unit is adapted to receive satellite information. The communication antenna allows for reception and/or transmission of complementary data. The communication module is connectable to the GNSS receiving unit and the communication antenna. The communication module is configured to provide complementary data received at the communication antenna to the GNSS receiving unit and/or to provide complementary data generated at the GNSS receiving unit to the communication antenna. The communication module is detachable or switchable for adaptation to an available communication technology.

Abstract: A method of extracting pseudorange information using a cellular device. A Global Navigation Satellite System (GNSS) chipset which is physically remote from a cellular device is accessed which provides raw GNSS observables information based upon signals received from a circularly polarized GNSS antenna. The raw GNSS observables information is wirelessly transmitted from the GNSS chipset to the cellular device. The raw GNSS observables information is extracted by a processor of the cellular device. The raw GNSS observables information, in addition to GNSS corrections from at least one correction source, is used by the processor to determine a position of the circularly polarized GNSS antenna.