Abstract: An antenna includes a convex structure and a concave structure that are formed on a side of a wide microstrip line in the antenna. A shape and a size of the convex structure and/or a shape and a size of the concave structure, a distance between convex structures, a distance between concave structures, and/or a distance between the convex structure and the concave structure are designed to enable the convex structure and the concave structure to resonate at different frequencies in order to support radiation of signals on different frequency bands.

Abstract: A waveguide apparatus and a related product are provided. The waveguide apparatus includes a first waveguide cavity, a first radiation port, and a second radiation port. A spacing between a radiation end of the first radiation port and a radiation end of the second radiation port is less than a spacing between a connection end of the first radiation port and a connection end of the second radiation port. The connection end of the first radiation port and the connection end of the second radiation port are both connected to the waveguide cavity.

Abstract: A waveguide apparatus and a related product are provided, and relate to the field of millimeter-wave radar technologies. The waveguide apparatus includes N radiation ports, a resonant cavity, a coupling cavity, and a feed-in structure, where N is an integer greater than or equal to 1. The feed-in structure is configured to feed a signal. The coupling cavity is configured to couple the signal to the resonant cavity. The resonant cavity is configured to radiate the signal over the N radiation ports in a first direction. The coupling cavity is located between the resonant cavity and the feed-in structure. The coupling cavity is connected to the resonant cavity in a second direction, and the first direction is perpendicular to the second direction.

Abstract: A transfer structure includes a circuit board that includes a first metal layer, a second metal layer, and a dielectric layer. The dielectric layer is located between the first metal layer and the second metal layer. The first metal layer includes a radiation portion and a microstrip that is coupled to one end of the radiation portion. The second metal layer is grounded. The radiation portion is provided with an opening to enable the radiation portion to form at least two resonance frequencies such that the operating bandwidth of the transfer structure can be extended.

Abstract: Embodiments of this application provide an antenna apparatus, a radar, a detection apparatus, and a terminal, and may be applied to intelligent driving, assisted driving, or autonomous driving. The antenna apparatus includes a first antenna array. The first antenna array includes at least one patch subunit, the at least one antenna unit includes a first antenna unit, and the first antenna unit includes a first patch subunit and a first feeder subunit. The first patch subunit sequentially includes at least two stubs in a first direction, the at least two stubs include a first stub and a second stub, and a length of the first stub in a second direction is less than a length of the second stub in the second direction.

Abstract: This application provides an antenna, which is particularly used in a millimeter-wave radar or a broadband radar. A convex structure and a concave structure are formed on a side of a wide microstrip line in the antenna. A shape and a size of the convex structure and/or a shape and a size of the concave structure, a distance between convex structures, a distance between concave structures, and/or a distance between the convex structure and the concave structure are designed, to enable the convex structure and the concave structure to resonate at different frequencies. In this way, the convex structure and the concave structure support radiation of signals on different frequency bands, so that broadband radiation of the antenna is implemented.