Abstract: Example embodiments describe a radar sensor, whereby the radar sensor comprises a pair of continuous wave (CW) radar transceivers that each has a leaky wave antenna that are provided adjacent to each other. Each CW radar transceiver comprises a microwave frequency transmission circuit configured to transmit and receive signals reflected off a nearby object. The transmitted and received signals are then processed by the radar sensor to determine a relative displacement between the detected object and the radar sensor. This determined relative displacement may then be used with machine learning techniques to identify dynamic gestures made within the radar sensor's range of detection.

Abstract: Example embodiments describe a radar sensor, whereby the radar sensor comprises a pair of continuous wave (CW) radar transceivers that each has a leaky wave antenna that are provided adjacent to each other. Each CW radar transceiver comprises a microwave frequency transmission circuit configured to transmit and receive signals reflected off a nearby object. The transmitted and received signals are then processed by the radar sensor to determine a relative displacement between the detected object and the radar sensor. This determined relative displacement may then be used with machine learning techniques to identify dynamic gestures made within the radar sensor's range of detection.

Abstract: A circularly polarized (CP) antenna for Radio Frequency energy harvesting comprising: a top substrate; a bottom substrate disposed on a ground plane; a middle substrate disposed between the top substrate and the bottom substrate; a slotted patch comprising more than one slots, the slotted patch being disposed on the top substrate; a slitted patch comprising a plurality of slits, the slitted patch being disposed between the top substrate and the middle substrate; a microstrip feed line disposed between the middle substrate and the bottom substrate; and a via connecting the slotted-circular-patch and the microstrip feed line to enable the slotted-circular-patch to be fed by the microstrip feed line, wherein the more than one slots and the slits are arranged so as to generate more than one orthogonal modes with equal magnitude for receiving RF signals.

Abstract: A circularly polarized (CP) antenna for Radio Frequency energy harvesting comprising: a top substrate; a bottom substrate disposed on a ground plane; a middle substrate disposed between the top substrate and the bottom substrate; a slotted patch comprising more than one slots, the slotted patch being disposed on the top substrate; a slitted patch comprising a plurality of slits, the slitted patch being disposed between the top substrate and the middle substrate; a microstrip feed line disposed between the middle substrate and the bottom substrate; and a via connecting the slotted-circular-patch and the microstrip feed line to enable the slotted-circular-patch to be fed by the microstrip feed line, wherein the more than one slots and the slits are arranged so as to generate more than one orthogonal modes with equal magnitude for receiving RF signals.