Abstract: Implementations disclosed describe devices and systems for close-range communications in high-density wireless network environments. A close-range antenna configured according to disclosed implementations generates a sufficiently strong near-field signal to ensure a reliable close-range communication. Additionally, the signal decreases significantly with the distance from the antenna and, therefore, contributes little in the way of interference and noise for other devices of the wireless environment. Various antenna systems that achieve this objective are disclosed.

Abstract: A method for measuring vital signs of an occupant in a vehicle seat is provided. In an embodiment, a sensor includes a transmission circuitry, a reception circuitry, and a controller. The transmission circuitry is configured to transmit a radar beam to an occupant in a vehicle seat. The reception circuitry is configured to receive a reflected signal. The reflected signal being a reflection of the radar beam from the occupant. The controller is configured to determine data associated with a vital sign of the occupant based on the reflected signal.