CN-224217706-U - Multi-frequency antenna with double low-frequency branches

Abstract

The utility model discloses a multi-frequency antenna with double low-frequency branches, which is characterized in that a first antenna main body, a feed point, a first antenna branch, a second antenna branch and a third antenna branch are arranged on an antenna radiating unit, and a second antenna main body, a feed point and a fourth antenna branch are arranged on an antenna coupling unit, wherein the first antenna branch, part of the second antenna branch, the third antenna branch and the feed point are all positioned on a plane where the second antenna main body is positioned, the other part of the second antenna branch and the fourth antenna branch are all positioned on the plane where the first antenna main body is positioned, the antenna wiring mode is adopted to realize that a plurality of low-frequency resonances are overlapped to meet different frequency band requirements, an antenna tuning switch and an FPC (flexible printed circuit) connecting wire for providing power supply and logic control for the switch are not needed, and the first antenna main body and the second antenna main body are overlapped to realize a plurality of frequency band coverage, so that the design difficulty and the whole machine cost are reduced.

Inventors

• FAN MAOLONG
• XIAO HUI
• ZHU LANG
• Xiong Zhonggui
• YU YOUQI

Assignees

• 深圳市三好无线通信有限公司

Dates

Publication Date

20260508

Application Date

20250714

Claims (10)

1. 1. The multi-frequency antenna with the double low frequency branches is characterized by comprising an antenna radiating unit and an antenna coupling unit, wherein the antenna radiating unit comprises a first antenna main body, a feed point, a first antenna branch, a second antenna branch and a third antenna branch, the first antenna branch is arranged at one end of the first antenna main body, one end of the second antenna branch is close to the first antenna branch, the other end of the second antenna branch is connected with the feed point and the first antenna main body, and the third antenna branch is arranged between the first antenna branch and the feed point at intervals; the antenna coupling unit comprises a second antenna main body, a feed point and a fourth antenna branch, wherein the second antenna main body, the feed point and the fourth antenna branch are connected with the other end of the first antenna main body, the feed point is arranged at one end of the second antenna main body and is close to the feed point, the fourth antenna branch is arranged at the other end of the second antenna main body and is close to the first antenna main body, the first antenna branch, part of the second antenna branch, part of the third antenna branch and the feed point are all positioned on the plane where the second antenna main body is located, and the other part of the second antenna branch and the fourth antenna branch are all positioned on the plane where the first antenna main body is located.
2. 2. The dual low frequency branched multi-frequency antenna of claim 1, further comprising a first notch and a second notch, the first notch being located along the first antenna branch past the first antenna body and extending into the second antenna branch, the second notch being located between the feed point and the junction of the first antenna body and the second antenna body, the first notch and the second notch being for adjusting antenna impedance.
3. 3. The dual low frequency branch multi-frequency antenna according to claim 2, wherein a slot between the first antenna body and the second antenna branch is provided in a side of the first slot near the feed point.
4. 4. A dual low frequency branched multi-frequency antenna according to claim 3, wherein said second antenna branch is provided with first stress holes arranged at intervals along the length direction of said slot.
5. 5. The dual low frequency branch multi-frequency antenna according to claim 2, wherein second stress holes are arranged at intervals on the first antenna body at two sides of the second groove.
6. 6. The dual low frequency branch multi-band antenna according to claim 5, wherein the second antenna body is provided with positioning holes symmetrical with respect to the second groove.
7. 7. The dual low frequency branch multi-band antenna according to claim 1, wherein a plurality of third stress holes are arranged at intervals on the fourth antenna branch.
8. 8. The dual low frequency branch multi-band antenna of claim 1, wherein the third antenna branch has an antenna parasitic branch disposed thereon proximate the first antenna branch.
9. 9. The dual low frequency branch multi-frequency antenna according to claim 1, wherein the first antenna branch and the fourth antenna branch are both branches of a low frequency antenna, the second antenna branch is a branch of an intermediate frequency antenna, and the third antenna branch is a branch of a high frequency antenna.
10. 10. The dual low frequency branch multi-band antenna according to claim 9, wherein the second antenna body further comprises a fifth antenna branch having one end extending along a length direction of the second antenna body, and the other end connected to the fourth antenna branch.

Description

Multi-frequency antenna with double low-frequency branches Technical Field The utility model belongs to the technical field of antennas, and particularly relates to a dual-low-frequency-branch multi-frequency antenna. Background Tablet computers or notebook computers as mobile terminal devices have been continuously penetrated in different fields for many years, and particularly have been widely used in education, office, industrial fields and the like. In recent years, with the development of AI and 5G technologies, AI and 5G are widely applied to tablet computers, so that the application scene and experience effect of the tablet computers are further expanded, and market demands are also increasing. The antenna with good application performance and controllable cost is one of the problems to be solved in tablet computers or notebook computers. The current mainstream design method adopts a tuning switch mode to realize the switching of different frequency bands, so that the antenna covers the requirements of a plurality of application frequency bands, but in a tablet personal computer, most of complete machine design schemes are that a main board is taken as an independent core main board, the main board is connected to an independent antenna small board through a coaxial line to feed the antenna (the universality of the main board and the placement of the antenna are convenient), the small board is additionally provided with the tuning switch, and meanwhile, the FPC is additionally provided for connecting the main board and the small board to supply power and logic control for the switch, so that the difficulty and the cost are increased in the complete machine design. Therefore, there is a need to provide a dual low frequency branch multi-band antenna to solve the above-mentioned problems. Disclosure of utility model In order to solve the problems, the utility model provides a dual-low-frequency branch multi-frequency antenna, which realizes the requirements of different frequency bands by realizing the superposition of a plurality of low-frequency resonances through antenna wiring, saves an antenna tuning switch and an FPC connecting wire which needs to provide power supply and logic control for the switch, and realizes multi-frequency band coverage through superposition of two low-frequency branches so as to solve the problems in the background technology. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The utility model provides a dual-low-frequency-branch multi-frequency antenna, which comprises an antenna radiating unit and an antenna coupling unit, wherein the antenna radiating unit comprises a first antenna main body, a feed point, a first antenna branch, a second antenna branch and a third antenna branch, the first antenna branch is arranged at one end of the first antenna main body, one end of the second antenna branch is close to the first antenna branch, the other end of the second antenna branch is connected with the feed point and the first antenna main body, and the third antenna branch is arranged between the first antenna branch and the feed point at intervals; the antenna coupling unit comprises a second antenna main body, a feed point and a fourth antenna branch, wherein the second antenna main body, the feed point and the fourth antenna branch are connected with the other end of the first antenna main body, the feed point is arranged at one end of the second antenna main body and is close to the feed point, the fourth antenna branch is arranged at the other end of the second antenna main body and is close to the first antenna main body, the first antenna branch, part of the second antenna branch, part of the third antenna branch and the feed point are all positioned on the plane where the second antenna main body is located, and the other part of the second antenna branch and the fourth antenna branch are all positioned on the plane where the first antenna main body is located. As an advantage of the foregoing technical solution, the dual-low-frequency-branch multi-frequency antenna further includes a first groove and a second groove, where the first groove is located along the first antenna branch, passes through the first antenna body and extends into the second antenna branch, and the second groove is located between a junction of the first antenna body and the second antenna body and the feed point, and the first groove and the second groove are used for adjusting antenna impedance. Preferably, a gap between the first antenna main body and the second antenna branch is arranged on one side of the first groove close to the feed point. As a preferable aspect of the foregoing disclosure, the second antenna branch is provided with first stress holes that are arranged at intervals along a length direction of the slot. As a preferable aspect of the foregoing, second stress holes are arranged on the first antenna main body at two side