An antenna comprises at least one cold plate serving as main mechanical structure and a set of transmission and reception modules, the modules supplied with electrical power by an electrical power distribution circuit connected to a power source delivering a power supply voltage, the distribution circuit formed by conductive tracks deposited by plasma spraying on the cold plate and crossing the cold plate to reach connection points to the transmission and reception modules.

The present invention is an antenna provided with: a plurality of radiating parts formed on a base plate; a waveguide tube inside of which radio waves emitted from the radiating parts propagate; a lens having a plurality of curved surfaces having a substantially hyperbolic shape and disposed in an opening of the waveguide tube; and a protruding part formed in a tapered shape between the plurality of radiating parts. The tip of the protruding part is formed at a position lower than an opening surface.

The present disclosure relates to an antenna device and a radar including the same. Specifically, the antenna device according to the present disclosure includes: at least one first antenna arranged in one direction and configured to radiate a beam tilted at a first tilt angle; at least one second antenna arranged to be spaced apart from the first antenna and configured to radiate a beam tilted at a second tilt angle; an input/output terminal disposed such that any one of a transmission signal and a reception signal moves therethrough; and a divider comprising a first port connected to the first antenna, a second port connected to the second antenna, and a third port connected to the input/output terminal, wherein the divider is disposed such that a signal transmitted to one of the first port and the second port is transmitted to a remaining one of the first and second port through a first path and a second path and the transmitted signal is isolated in the remaining port.

A full duplex dual polar radar transceiver comprising a dual polarisation radar antenna, a transmission path, a horizontal polarisation receive path, and a vertical polarisation receive path, a first cancellation path connected between the transmission path and the vertical polarisation receive path, and a second cancellation path connected between the transmission path and the horizontal polarisation receive path. Each cancellation path is configured to vary a transmission signal provided by the transmission path by varying at least one of a phase shift, a delay, or an amplitude so as to cancel self-interference on each of the vertical and horizontal polarisation receive paths.

A full duplex dual polar radar transceiver comprising a dual polarisation radar antenna, a transmission path, a horizontal polarisation receive path, and a vertical polarisation receive path, a first cancellation path connected between the transmission path and the vertical polarisation receive path, and a second cancellation path connected between the transmission path and the horizontal polarisation receive path. Each cancellation path is configured to vary a transmission signal provided by the transmission path by varying at least one of a phase shift, a delay, or an amplitude so as to cancel self-interference on each of the vertical and horizontal polarisation receive paths.

Radar circuitry can include an isolator and a mixer. The isolator can isolate a transmission signal path and a reception signal path from each other, and generate a mixing (e.g. oscillation) signal based on a transmission signal. The isolator can be coupled to the mixer such that the drive signal drives the mixer (e.g. serves as the local oscillation signal of the mixer). The mixer mixes a received signal and the drive signal to generate a converted signal (e.g. a down-converted signal). The isolator can be a hybrid transformer or electrically balanced duplexer.

Monostatic radar with progressive length transmission may be used with half-duplex systems or with full-duplex systems to reduce self-interference. The system transmits a first signal for a first duration and receives a first reflection of the first signal from a first object during a second duration. The system transmits a second signal for a third duration longer than the first duration and receives a second reflection of the second signal from a second object during a fourth duration. The system calculates a position of the first object and the second object based on the first reflection and the second reflection. The first signal, first duration, and second duration are configured to detect reflections from objects within a first distance of the system. The second signal, third duration, and fourth duration are configured to detect reflections from objects between the first distance and a second distance from the system.

The present disclosure relates to a radar transmitting device, comprising a CMOS transceiver chip configured to provide at least one local oscillator signal at an output of the CMOS transceiver chip, and at least one BiCMOS transmitter chip coupled to the CMOS transceiver chip. The BiCMOS transmitter chip has an input for the local oscillator signal, at least one amplifier coupled to the input, a plurality of outputs for outputting a radar transmission signal on the basis of the local oscillator signal, and a plurality of transmission paths between the input and the plurality of outputs. Each of the transmission paths has a controllable analog phase shifter for controllable beam scanning during emission of the radar transmission signal. Additionally or alternatively, individual transmission paths of the BiCMOS transmitter chip can be selectively activated or deactivated using control signals.

A distance measuring device according to an embodiment includes a filter, a first switching circuit, an impedance adjustable circuit, a second switching circuit, a third switching circuit, and a fourth switching circuit. The filter restricts a signal for distance measurement transmitted from the transmission circuit and a signal for distance measurement received by an antenna within a desired frequency band. The impedance adjustable circuit is adjusted to have a higher impedance than an impedance of the antenna. The second switching circuit switches conduction and non-conduction between the impedance adjustable circuit and the transmission circuit. The third switching circuit switches conduction and non-conduction between the impedance adjustable circuit and the reception circuit. The fourth switching circuit switches conduction and non-conduction between the impedance adjustable circuit and the second switching circuit and between the impedance adjustable circuit and the third switching circuit.

Automotive radar methods and systems for enhancing resistance to interference using a built-in self-test (BIST) module. In one illustrative embodiment, an automotive radar transceiver includes: a signal generator that generates a transmit signal; a modulator that derives a modulated signal from the transmit signal using at least one of phase and amplitude modulation; at least one receiver that mixes the transmit signal with a receive signal to produce a down-converted signal, the receive signal including the modulated signal during a built-in self-test (BIST) mode of operation; and at least one transmitter that drives a radar antenna with a selectable one of the transmit signal and the modulated signal.