Antenna, detection apparatus, and terminal
View Patent ↗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.
1 . An antenna, comprising:
a dielectric substrate comprising a first side and a second side;
a metal floor disposed on the first side; and
a microstrip radiation structure disposed on the second side, having a first length in a direction that is less than or equal to 0.7 times a center operating wavelength of the antenna, and comprising:
a first radiating element formed by a convex structure on the microstrip radiation structure, wherein the first radiating element supports a first frequency band, wherein a second length of the first radiating element in the direction is greater than or equal to 0.02 times the center operating wavelength; and
a second radiating element formed by a concave structure on the microstrip radiation structure, wherein the second radiating element supports a second frequency band.
2 . The antenna of claim 1 , wherein the microstrip radiation structure comprises one or more of a plurality of first radiating elements and a plurality of second radiating elements.
3 . The antenna of claim 2 , wherein the microstrip radiation structure further comprises adjacent radiating elements, and wherein a third radiating element is between at least one group of two adjacent radiating elements.
4 . The antenna of claim 3 , wherein a first distance between centers of a first group of two groups of adjacent radiating elements in a first direction is greater than or equal to 0.65 times a center operating wavelength of the antenna.
5 . The antenna of claim 2 , wherein the first radiating elements further comprises two groups of adjacent radiating elements, wherein a first distance between centers of a first group of the two groups of adjacent radiating elements is equal or unequal to a second distance between centers of a second group of the two groups of adjacent radiating elements.
6 . The antenna of claim 2 , wherein the second radiating elements further comprises two groups of adjacent radiating elements, wherein a first distance between centers of a first group of the two groups of adjacent radiating elements is equal or unequal to a second distance between centers of a second group of the two groups of adjacent radiating elements.
7 . The antenna of claim 2 , wherein the first radiating elements are disposed on a same side of the microstrip radiation structure.
8 . The antenna of claim 2 , wherein the second radiating elements are all disposed on a same side of the microstrip radiation structure.
9 . The antenna of claim 2 , wherein any two of the first radiating elements have a same first shape;
wherein any two of the second radiating elements have a same second shape; or
wherein more than two of the first radiating elements have a same third shape.
10 . The antenna of claim 1 , wherein a shape of the first radiating element or the second radiating element is a quadrilateral.
11 . The antenna of claim 1 , wherein the microstrip radiation structure further comprises:
a first end; and
an impedance matching structure disposed at the first end, and
wherein the impedance matching structure is configured to match an impedance of the antenna.
12 . The antenna of claim 11 , wherein the impedance matching structure is a multi-stage impedance matching structure.
13 . The antenna of claim 11 , wherein the microstrip radiation structure further comprises a second end, and wherein the second end is an open circuit or a short circuit.
14 . The antenna of claim 1 , wherein a feeding manner of the antenna may be end feeding.
15 . The antenna of claim 1 , wherein a length of the first radiating element in a first direction is greater than or equal to 0.5 times a center operating wavelength of the antenna.
16 . A vehicle, comprising:
a sensor system configured to sense an obstacle and comprising an antenna, wherein the antenna comprises:
a dielectric substrate comprising a first side and a second side;
a metal floor disposed on the first side; and
a microstrip radiation structure disposed on the second side, having a first length in a direction that is less than or equal to 0.7 times a center operating wavelength of the antenna, and comprising:
a first radiating element formed by a convex structure on the microstrip radiation structure, wherein the first radiating element supports a first frequency band, wherein a second length of the first radiating element in the direction is greater than or equal to 0.02 times the center operating wavelength; and
a second radiating element formed by a concave structure on the microstrip radiation structure, wherein the second radiating element supports a second frequency band; and
a processor coupled to the antenna and configured to receive input from the sensor system to control motion of the vehicle based on input from the sensor system.
17 . The vehicle of claim 16 , wherein the microstrip radiation structure comprises one or more of a plurality of first radiating elements and a plurality of second radiating elements.
18 . The vehicle of claim 17 , wherein the microstrip radiation structure further comprises adjacent radiating elements, and wherein a third radiating element is between at least one group of two adjacent radiating elements.
19 . The vehicle of claim 17 , wherein the first radiating elements further comprises two groups of adjacent radiating elements, wherein a first distance between centers of a first group of the two groups of adjacent radiating elements is equal or unequal to a second distance between centers of a second group of the two groups of adjacent radiating elements.
20 . The vehicle of claim 17 , wherein the second radiating elements further comprises two groups of adjacent radiating elements, wherein a first distance between centers of a first group of the two groups of adjacent radiating elements is equal or unequal to a second distance between centers of a second group of the two groups of adjacent radiating elements.