An antenna array for a high frequency device includes a plurality of antenna elements used for a radar device and arranged in a two-dimensional array in a predetermined area. The plurality of antenna elements includes grouped on-elements and single on-elements with specific distance for grating lobe cancellation, each of them is electrically connected to a phase shifter. The on-elements are arranged such that density of the on-elements at a center portion in the two-dimensional array is high and density of the on-elements at four corners in the two-dimensional array is low.

A signal emitting apparatus provided in a vehicle to which power is transferred from a ground side power supplying apparatus by noncontact, includes: a signal emitting device for emitting a signal including information relating to the vehicle wirelessly toward the ground side power supplying apparatus; an outside environment acquiring part for acquiring information relating to an outside environment at surroundings of the ground side power supplying apparatus; and a control part for controlling the signal emitting device. The control part changes a mode of wireless signal emission of the signal emitting device in accordance with the outside environment.

According to one embodiment, a radar device includes a transmission module including a transmission antenna and first integrated circuits, a reception module including a reception antenna and second integrated circuits, and a third integrated circuit. Each of the first integrated circuits includes first transmission circuits, first reception circuits, and a first signal generation circuit. Each of the second integrated circuits includes second transmission circuits, second reception circuits, and a second signal generation circuit. The third integrated circuit includes third transmission circuits, third reception circuits, and a third signal generation circuit.

Radar device comprising a transmit antenna array comprising a plurality of transmit antennas each having a phase center; and a receive antenna array comprising a plurality of receive antennas each having a phase center, the transmit antennas being arranged such that their phase centers lie on a first straight line, and the receive antennas being arranged such that their phase centers lie on a second straight line; wherein the transmit antenna array and the receive antenna array are positioned relative to each other such that the first straight line and the second straight line extend in an oblique angle relative to each other.

A method and system are provided for generating a trigger signal from a radar signal received over the air from a radar under test. The method includes detecting power of the radar signal received from the radar under test at a radio frequency (RF) power detector, the radar signal including multiple bursts of RF energy in a burst pattern; identifying repeating radar frames from the burst pattern using the detected power of the radar signal, each radar frame having at least one burst; and creating trigger signals corresponding to the radar frames, respectively, by synchronizing to the at least one burst in each radar frame.

A transceiver includes first electrical channels and second electrical channels. The first electrical channels are configured to transfer electromagnetic signals to first air waveguides. Each of the first electrical channels extend from a transmitter along an exterior surface of a chip package that supports the transmitter and terminate at first transitions on the exterior surface. Each of the first plurality of air waveguides are attached to the exterior surface and overlay one of the first transitions. The transceiver also includes second electrical channels configured to transfer second electromagnetic signals from second air waveguides. Each of the second electrical channels extend from a receiver along the exterior surface of the chip package that supports the receiver and terminate at second transitions on the exterior surface. Each of the second air waveguides are attached to the exterior surface and overlay one of the second transitions.

A communication system is a communication system provided in a mobile body and including an acquirer configured to acquire a destination of the mobile body and a position of the mobile body, and a communicator configured to communicate with a communication device outside the mobile body using an antenna, in which the communicator is configured to set a reception sensitivity of the antenna when the position of the mobile body approaches to within a predetermined distance from the destination of the mobile body to be higher than a reception sensitivity of the antenna before the position of the mobile body approaches to within the predetermined distance.

A self-diagnosis device of a radar system or a phased-array antenna module including a general-purpose multi-channel IC and a transmission phase shifter IC having a plurality of transmission output terminals and reception terminals is configured to perform a self-diagnosis of the transmission phase shifter by utilizing a signal that is generatable by the general-purpose multi-channel IC, which is enabled by a built-in self-test circuit that (A) generates a self-diagnosis monitor signal converted into a low frequency band, which is a mixture of (i) a self-diagnosis signal generated from (a) a third output signal and a fourth output signal output in sync from same PLL with (b) a first output signal to be supplied to a reception frequency converter of the general-purpose multi-channel IC, and (ii) a composite signal of the transmission channel, and (B) analyzes a phase of the self-diagnosis monitor signal.

Embodiments of a vehicular radar system are presented herein. One embodiment comprises a first circuitry layer including a first radar subsystem for a first frequency band, the first radar subsystem including a first end-fire antenna. The vehicular radar system also includes a second circuitry layer stacked on or under the first circuitry layer, the second circuitry layer including a second radar subsystem for a second frequency band, the second radar subsystem including a second end-fire antenna. In this embodiment, one or more components of the vehicular radar system are shared between the first and second radar subsystems.

Examples disclosed herein relate to two-dimensional radar for use in millimeter wave applications. An antenna structure of the two-dimensional radar includes a transmit array arranged along a first axis and configured to scan a field of view along the first axis at a first scan rate with radio frequency (RF) beams in a first polarization, and a receive array arranged along a second axis orthogonal to the first axis and configured to receive return RF beams in the first polarization to scan the field of view along the second axis at a second scan rate different from the first scan rate. Other examples disclosed herein relate to an antenna system for two-dimensional radar in millimeter wave applications and a radar system with two-dimensional scanning.