Antenna structure, radar, and terminal
An antenna structure, a radar, and a terminal may be applied to the field of millimeter-wave radars and can extend a 3 dB bandwidth of the antenna structure. The antenna structure includes: A main feeder and at least one patch unit group, where the at least one patch unit group is connected in series to the main feeder in a length direction of the main feeder, and each of the at least one patch unit group includes at least two patch units disposed in a V-shaped structure. Each patch unit group is connected in series to the main feeder through the two patch units that are disposed in the V-shaped structure and that are in each patch unit group.
1. An antenna structure, comprising:
a main feeder; and
a plurality of patch unit groups connected to the main feeder in series along a longitudinal direction of the main feeder; and
wherein each patch unit group of the plurality of patch unit groups comprises two patch units disposed in a V-shaped structure; and
wherein the plurality of patch unit groups are connected to two sides of the main feeder.
2. The antenna structure according to claim 1 , wherein each patch unit group of the plurality of patch unit groups is connected to the main feeder through a connection point of the two patch units of the patch unit group.
3. The antenna structure according to claim 1 , wherein a polarization direction of each patch unit group of the plurality of patch unit groups is horizontal.
4. The antenna structure according to claim 1 , wherein the antenna structure is part of a radar.
5. The antenna structure according to claim 1 , wherein the plurality of patch unit groups are alternately connected to the two sides of the main feeder.
6. The antenna structure according to claim 1 ,
wherein, in the longitudinal direction of the main feeder, widths of patch units connected to the main feeder (a) increase then decrease, (b) increase, or (c) decrease.
7. The antenna structure according to claim 1 , wherein the antenna structure is a receive antenna or a transmit antenna.
8. The antenna structure according to claim 4 , wherein the radar further comprises:
a control chip connected to a second end of the antenna structure, wherein the control chip is configured to control the antenna structure to transmit or receive a signal.
9. The antenna structure according to claim 8 , wherein the radar further comprises:
an impedance matching unit configured to match impedance of the second end of the antenna structure with impedance of the control chip, wherein the control chip is connected to the second end of the antenna structure through the impedance matching unit.
10. The antenna structure according to claim 4 , wherein the radar further comprises:
a printed circuit board;
wherein the printed circuit board comprises the antenna structure, a dielectric layer, and a metal layer that are sequentially disposed in a stacked manner, and the antenna structure is grounded through the metal layer.
11. An antenna structure, comprising:
a main feeder; and
a plurality of patch unit groups connected to the main feeder in series along a longitudinal direction of the main feeder; and
wherein each patch unit group of the plurality of patch unit groups comprises two patch units disposed in a V-shaped structure;
wherein, in the longitudinal direction of the main feeder, widths of patch units connected to the main feeder (a) increase then decrease, (b) increase, or (c) decrease.
12. The antenna structure according to claim 11 , wherein the antenna structure is part of a radar.
13. The antenna structure according to claim 11 , wherein a polarization direction of each patch unit group of the plurality of patch unit groups is horizontal.
14. A method for producing an antenna apparatus, comprising:
etching an antenna structure on a first metal layer, wherein the antenna structure comprises a main feeder and at least one patch unit group connected to the main feeder, wherein each patch unit group of the at least one patch unit group comprises two patch units disposed in a V-shaped structure;
bonding a first surface of the antenna structure and a first surface of a dielectric layer together; and
bonding a second surface of the dielectric layer and a first surface of a second metal layer together, wherein the first surface of the dielectric layer is disposed opposite to the second surface of the dielectric layer, and the antenna structure is grounded through the second metal layer.
15. The method according to claim 14 , wherein each patch unit group of the at least one patch unit group is connected to the main feeder through a connection point of the two patch units of the patch unit group.
16. The method according to claim 14 , wherein a polarization direction of each patch unit group of the at least one patch unit group is horizontal.
17. The method according to claim 14 , wherein the at least one patch unit group comprises a plurality of patch unit groups connected to the main feeder in series in a longitudinal direction of the main feeder, and the plurality of patch unit groups are connected to two sides of the main feeder.
18. The method according to claim 17 , wherein the plurality of patch unit groups are alternately connected to the two sides of the main feeder.
19. The method according to claim 14 , wherein the at least one patch unit group comprises a plurality of patch unit groups connected to the main feeder in series in a longitudinal direction of the main feeder; and
wherein, in the longitudinal direction of the main feeder, widths of patch units connected to the main feeder (a) increase then decrease, (b) increase, or (c) decrease.
20. The method according to claim 14 , wherein the antenna structure is a transmit antenna or a receive antenna.