ANTENNA APPARATUS, RADAR, DETECTION APPARATUS, AND TERMINAL
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.
1 . An antenna apparatus, comprising:
a first antenna array, wherein
the first antenna array comprises at least one antenna unit, the at least one antenna unit comprises a first antenna unit, and the first antenna unit comprises a first patch subunit and a first feeder subunit; and
the first patch subunit sequentially comprises at least two stubs in a first direction, the at least two stubs comprise 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.
2 . The apparatus according to claim 1 , wherein
a direction in which the first antenna unit radiates a signal on a first frequency band is a third direction, wherein the third direction is a normal direction of the first antenna unit;
directions in which the first antenna unit radiates signals on a second frequency band are a fourth direction and a fifth direction, wherein the fourth direction and the fifth direction are respectively located on two sides of the third direction; and
the first frequency band is different from the second frequency band.
3 . The apparatus according to claim 1 , wherein
the first antenna unit radiates a horizontal single peak beam on a first frequency band;
the first antenna unit radiates a horizontal double peak beam on a second frequency band; and
the first frequency band is different from the second frequency band.
4 . The apparatus according to claim 2 , wherein a current on the first stub flows in the first direction.
5 . The apparatus according to claim 2 , wherein components of a current on the second stub in the second direction are symmetrical in the first direction.
6 . The apparatus according to claim 1 , wherein
the at least two stubs comprise the first stub, the second stub, and a third stub; and a length of the third stub in the second direction is greater than the length of the first stub in the second direction and less than the length of the second stub in the second direction.
7 . The apparatus according to claim 1 , wherein
the length of the first stub in the second direction is L1, 0.35λ≤L1≤0.65λ, and λ is an operating wavelength of the antenna apparatus.
8 . The apparatus according to claim 1 , wherein the length of the second stub in the second direction is L2, 0.7λ≤L2≤1.3λ, and λ is an operating wavelength of the antenna apparatus.
9 . The apparatus according to claim 6 , wherein
the length of the third stub in the second direction is L3, and 0.525λ≤L3≤1.125λ.
10 . The apparatus according to claim 1 , wherein
a length of the first patch subunit in the first direction is L4, and 0.5λ≤L4≤1.5λ.
11 . The apparatus according to claim 1 , wherein
the first stub is configured to generate a horizontal single peak beam; and/or
the second stub is configured to generate a horizontal double peak beam.
12 . The apparatus according to claim 1 , wherein the first stub, the second stub, or a third stub is in a shape of a rectangle, an ellipse, a circle, a rhombus, a square, or a trapezoid.
13 . The apparatus according to claim 1 , wherein an edge of the first stub, the second stub, or a third stub is in a shape of a line segment, an arc, an irregular sawtooth line, or an irregular arc whose included angle with the first direction is A, wherein A ranges from 0° to 180°.
14 . The apparatus according to claim 1 , wherein
the at least one antenna unit further comprises a second antenna unit, wherein the second antenna unit and the first antenna unit have a same structure; and
the first antenna unit and the second antenna unit are connected in the first direction.
15 . The apparatus according to claim 1 , wherein a distance between the first antenna unit and a second antenna unit in the first direction is 0.5×N first wavelengths, wherein N is a positive integer.
16 . The apparatus according to claim 6 , wherein
a central axis of the first stub in the first direction, a central axis of the second stub in the first direction, or a central axis of the third stub in the first direction is parallel to the second direction.
17 . The apparatus according to claim 1 , wherein
the antenna apparatus further comprises a second antenna array, wherein the second antenna array and the first antenna array have a same structure.