Abstract: An apparatus comprises a coherent radar system on a single chip that operates in a range of operation in a terahertz range, where the range of operation is between approximately 0.1 THz and 1 THz.

Abstract: A system comprises a personal device such as one used by law enforcement, and a housing containing a portable radar system with both a ranging resolution and lateral resolution sufficient to detect an object concealed on a person (e.g., one that operates in the THz range), where the housing is configured to be mounted in contact with the personal device such that when mounted, the combined handheld device and housing have a form factor that allows it to retain its characteristic as a personal device, and where the portable radar system is configured to, when in operation, emit a radar beam and to receive a reflection of the emitted radar beam.

Abstract: An apparatus includes a lens with substantially flat first surface and a substantially tiered second surface opposite the substantially flat first surface, where the substantially tiered second surface has at least a central tier and a second tier, the central tier and the second tier each having a different thickness from the other tier, and where the thickness of each tier as measured orthogonally from the substantially flat first surface is chosen to provide a delay for the signal passing through the lens to approximate the characteristics of a Luneburg type lens as a radar beam is swept across the substantially first surface.

Abstract: A system for scanning targets for concealed objects comprises a set of analog imaging components of a portable radar system with both a ranging resolution and lateral resolution sufficient to detect an object concealed on a person, where the analog imaging components are contained with a first housing and in communication with digital processing components contained in a second housing, where the digital processing components are configured to receive imaging information from the analog components for processing. Each housing is configured to be attached to a user's article of equipment.

Abstract: An apparatus comprises a first and second coherent radar system on a first chip configured to operate in a terahertz range to provide a frequency modulated continuous wave, and having a first and second field of view, respectively. The apparatus further comprises a first processor in communication with the first coherent radar system and configured to include instructions to send a first signal to the first coherent radar system to scan a target with the first field of view, and a second processor in communication with the second coherent radar system and configured to collaborate with the first processor, and further configured to include instructions to send a second signal to the second coherent radar system to scan a target within the second field of view.

Abstract: A method comprises performing, by a first coherent radar system on a chip configured to operate in a terahertz range between 0.1 THz and 1 THZ, a first radar scan of a target, the first coherent radar system being in physical contact with a first non-physical scanning device. The first non-physical scanning device then receives first scanning data from the first radar scan, and sends a coordination signal to a second non-physical scanning device. A second coherent radar system on a chip configured to operate in the terahertz range performs a second radar scan of the target, the second coherent radar system being in physical contact with the second non-physical scanning device. The second non-physical device receives second scanning data from the second radar scan, and the first and second scanning data are sent to a processor for a determination as to whether an impermissible object has been detected.

Abstract: An apparatus comprises an aerial drone with a coherent radar system on a chip that operates in the terahertz range, the chip being in physical contact with the drone and configured to conduct a noninvasive scan of a target in a line of site field of view of the drone.

Abstract: A device and method for terahertz signal generation are disclosed. Oscillators are arranged in a two-dimensional array, each oscillator connected to a corresponding antenna. Each oscillator is unidirectional connected to its adjacent oscillators by a phase shifter. A method for generating a steerable terahertz signal utilizes an array of oscillators connected by corresponding phase shifters. A terahertz signal having a fundamental frequency is generated using the array. The phase shift of one or more of the phase shifters is varied in order to vary the fundamental frequency and/or steer the signal generated by the array.

Abstract: A method comprises scanning a subject with a coherent radar beam from a single chip operating in the terahertz range, and executing instructions, on a processor, to create one or more digital images based said scanning. One or more digital images are combined at the processor to form a super image, and based on the super image, the processor determines whether the subject is carrying a concealed object. if the subject is determined to be carrying a concealed object, and certain alert-generating rules are met, an alert is generated.

Abstract: A device and method for terahertz signal generation are disclosed. Oscillators are arranged in a two-dimensional array, each oscillator connected to a corresponding antenna. Each oscillator is unidirectional connected to its adjacent oscillators by a phase shifter. A method for generating a steerable terahertz signal utilizes an array of oscillators connected by corresponding phase shifters. A terahertz signal having a fundamental frequency is generated using the array. The phase shift of one or more of the phase shifters is varied in order to vary the fundamental frequency and/or steer the signal generated by the array.

Abstract: A device and method for terahertz signal generation are disclosed. Oscillators are arranged in a two-dimensional array, each oscillator connected to a corresponding antenna. Each oscillator is unidirectional connected to its adjacent oscillators by a phase shifter. A method for generating a steerable terahertz signal utilizes an array of oscillators connected by corresponding phase shifters. A terahertz signal having a fundamental frequency is generated using the array. The phase shift of one or more of the phase shifters is varied in order to vary the fundamental frequency and/or steer the signal generated by the array.

Abstract: A high-power transmitter with a fully-integrated phase Iocking capability is disclosed and characterized. Also provided herein is a THz radiator structure based on a return-path gap coupler, which enables the high-power generation of the disclosed transmitter, and a self-feeding oscillator suitable for use with the transmitter.

Abstract: A high-power transmitter with a fully-integrated phase Iocking capability is disclosed and characterized. Also provided herein is a THz radiator structure based on a return-path gap coupler, which enables the high-power generation of the disclosed transmitter, and a self-feeding oscillator suitable for TS use with the transmitter.

Abstract: A device and method for terahertz signal generation are disclosed. Oscillators are arranged in a two-dimensional array, each oscillator connected to a corresponding antenna. Each oscillator is unidirectional connected to its adjacent oscillators by a phase shifter. A method for generating a steerable terahertz signal utilizes an array of oscillators connected by corresponding phase shifters. A terahertz signal having a fundamental frequency is generated using the array. The phase shift of one or more of the phase shifters is varied in order to vary the fundamental frequency and/or steer the signal generated by the array.

Abstract: A high-power broadband radiation system and method are disclosed. The system includes an array of harmonic oscillators with mutual coupling through quadrature oscillators. Based on a self-feeding structure, the presently disclosed harmonic oscillators simultaneously achieve optimum conditions for fundamental oscillation and 2nd-harmonic generation. The signals at the second harmonic radiate through on-chip slot antennas, and are in-phase combined inside a hemispheric silicon lens attached at the backside of the chip. In some embodiments, the radiation of the system can also be modulated by narrow pulses generated on chip, thereby achieving broad radiation bandwidth.

Abstract: A high-power broadband radiation system and method are disclosed. The system includes an array of harmonic oscillators with mutual coupling through quadrature oscillators. Based on a self-feeding structure, the presently disclosed harmonic oscillators simultaneously achieve optimum conditions for fundamental oscillation and 2nd-harmonic generation. The signals at the second harmonic radiate through on-chip slot antennas, and are in-phase combined inside a hemispheric silicon lens attached at the backside of the chip. In some embodiments, the radiation of the system can also be modulated by narrow pulses generated on chip, thereby achieving broad radiation bandwidth.

Abstract: The present disclosure provides a tunable signal source having a plurality of oscillator cores having a coupling input, a coupling output, and a power output that is common to each of the plurality of oscillator cores. Also included is a plurality of tunable phase shifters wherein corresponding ones of the plurality of tunable phase shifters are communicatively coupled between the coupling input and the coupling output of corresponding ones of the plurality of oscillator cores, thereby forming a loop of alternating ones of the plurality of oscillator cores and alternating ones of the plurality of tunable phase shifters.

Abstract: A passive frequency divider in a CMOS process. More specifically, an electrical distributed parametric oscillator to realize a passive CMOS frequency divider with low phase noise. Instead of using active devices, which are the main sources of noise and power consumption, an oscillation at half of the input frequency is sustained by the parametric process based on nonlinear interaction with the input signal. For example, one embodiment is a 20 GHz frequency divider utilizing a CMOS varactor and made in a 0.13 ?m CMOS process. In this embodiment: (i) without any dc power consumption, 600 mV differential output amplitude can be achieved for an input amplitude of 600 mV; and (ii) the input frequency ranged from 18.5 GHz to 23.5 GHz with varactor tuning. In this embodiment, the output phase noise is almost 6 dB lower than that of the input signal for all offset frequencies up to 1 MHz. Also, a resonant parametric amplifier with a low noise figure (NF) by exploiting the noise squeezing effect.

Abstract: An apparatus and method for outputting high-frequency, high-power signals from low-frequency, low-power input is disclosed. The apparatus and method may provide a two-dimensional nonlinear lattice having a plurality of inductors and voltage-dependent capacitors intersecting at a plurality of nodes. Two or more adjacent boundaries of the nonlinear lattice may be provided with input signals which constructively interfere to output a signal of substantially higher amplitude and higher frequency than those of the input signals.

Abstract: Filters and methods which may be used with millimeter-wave and terahertz frequency range are disclosed. The filter is formed as an electrical prism which may include a first lattice forming an interface with a second lattice. Each lattice may include a plurality of passive elements, such as inductors, capacitors, and the like. The first lattice may include an input disposed at an input boundary thereof, while the second lattice may include an output disposed at an output boundary thereof. Furthermore, the first and second lattices may be configured to receive a signal at the input of the first lattice, propagate the signal to the interface, and direct the signal to the outputs of the second lattice.