The disclosure is directed to an antenna assembly (1) comprising a horizontally polarized Vivaldi-type first antenna (5). The first antenna (5) comprises a horizontally polarized first radiator (6) extending in a horizontal plane (xy) having a flower-shaped outline comprising several tapered slots (7) arranged distributed around a radiator center (8). The first radiator (6) is horizontally (xy) extending with respect to the radiator center (8) in an outward direction. In vertical direction (z), the radiator extends by a certain thickness (t). A base plate (9) arranged at a certain distance below the radiator (6) interconnected to the radiator (6) by at least one post (10). A power divider (11) and a feeding stub (12) per tapered slot (7) are arranged between the base plate (9) and the first radiator (6). interconnected to the first radiator (6) for coupling radio signals into the first radiator (6).

An antenna device includes a ground plate which is a flat plate-shaped conductor member, an opposing conductive plate which is a flat plate-shaped conductor member installed at a predetermined distance from the ground plate and is electrically connected to a power supply line, and a plurality of short-circuit pins for electrically connecting the opposing conductive plate and the ground plate. One end of a plurality of short-circuit pins extends to a conductive plate plane, which is a plane including the opposing conductive plate, and the other end of the plurality of short-circuit pins extends to the ground plate plane, which is a plane including the ground plate. One or more of the plurality of short-circuit pins connect the opposing conductive plate and the ground plate.

An antenna device includes a ground plate which is a flat plate-shaped conductor member, an opposing conductive plate which is a flat plate-shaped conductor member installed at a predetermined distance from the ground plate and is electrically connected to a power supply line, and a plurality of short-circuit pins for electrically connecting the opposing conductive plate and the ground plate. One end of a plurality of short-circuit pins extends to a conductive plate plane, which is a plane including the opposing conductive plate, and the other end of the plurality of short-circuit pins extends to the ground plate plane, which is a plane including the ground plate. One or more of the plurality of short-circuit pins connect the opposing conductive plate and the ground plate.

A radar device includes a transmission antenna and a reception antenna that is a structure different from the transmission antenna. The transmission antenna includes a single or a plurality of transmission element antennae and a transmission dielectric substrate where the single or the plurality of transmission element antennae is positioned, and a length in a first direction of the transmission antenna is longer than a length in a second direction of the transmission antenna, and the second direction is orthogonal to the first direction. The reception antenna includes a single or a plurality of reception element antennae and a reception dielectric substrate where the single or the plurality of reception element antennae is positioned, a length in a third direction of the reception antenna is longer than a length in a fourth direction of the reception antenna, and the fourth direction is orthogonal to the third direction.

A radar device includes a transmission antenna and a reception antenna that is a structure different from the transmission antenna. The transmission antenna includes a single or a plurality of transmission element antennae and a transmission dielectric substrate where the single or the plurality of transmission element antennae is positioned, and a length in a first direction of the transmission antenna is longer than a length in a second direction of the transmission antenna, and the second direction is orthogonal to the first direction. The reception antenna includes a single or a plurality of reception element antennae and a reception dielectric substrate where the single or the plurality of reception element antennae is positioned, a length in a third direction of the reception antenna is longer than a length in a fourth direction of the reception antenna, and the fourth direction is orthogonal to the third direction.

An interconnection device is described including a transmission part for feeding an antenna, the transmission part including a signal feed element and a ground element connectable to a circuit board, a first end of the ground element connectable to the circuit board and a second end of the ground element connectable to the antenna and a first end of the signal feed element connectable to an antenna feeding port on the circuit board and a second end of the signal feed element connectable to an antenna feeding line of the antenna.

A waveguide antenna (200) is disclosed, comprising: a first plurality (220) of slots (222,224), for producing a beam having a first radiation pattern (301) at a first resonant frequency (f1); and a second plurality (230) of slots (232, 234), for producing a beam having a second radiation pattern (302) at a second resonant frequency (f2). A method of operation of the waveguide antenna (200) is also disclosed, comprising: operating the transceiver at a first frequency (f1) to detect objects in a first field of view; and operating the transceiver at a second frequency (fa) to detect objects in a second field of view

An antenna device (1) includes an antenna element (6) and a plurality of EBG elements (10), in which the plurality of EBG elements (10) includes a plurality of first EBG elements (11) and a plurality of second EBG elements (12) having a structure different from a structure of the plurality of first EGB elements (11).

An antenna device (1) includes an antenna element (6) and a plurality of EBG elements (10), in which the plurality of EBG elements (10) includes a plurality of first EBG elements (11) and a plurality of second EBG elements (12) having a structure different from a structure of the plurality of first EGB elements (11).

A terahertz full-duplex co-local oscillator solid-state front-end transmitting circuit is disclosed, which belongs to the technical field of terahertz communication. The overall structure of the solid-state front-end transmitting circuit adopts a new system, wherein the circuit comprises two branches that are parallel and driven by a local oscillator source. A branched waveguide directional coupler is configured to output two driving signals provided by the same local oscillator source respectively to two branch circuits with required powers. Two transmission signals generated from the two branches are combined into one signal for transmission through an orthogonal mode coupled duplexer, so as to fulfill the construction of a full-duplex co-local oscillator solid-state front-end transmission circuit.