Metal frame flat plate double-WIIF antenna
By designing coupling slots on the metal frame and dual WIIF antennas on the PCB board, and using spring contacts to form radiation branches, the radiation efficiency and directivity issues of metal-bodied tablet antennas in situations of insufficient space are solved, thus improving the user experience.
Patent Information
- Application Number
- CN202520586558.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-31
AI Technical Summary
In the existing technology, the antenna design of tablet computers with metal bodies cannot meet the requirements of radiation efficiency and directionality. Especially in the case of insufficient clearance environment, commonly used FPC and LDS antennas cannot radiate effectively, resulting in poor user experience.
A metal-framed planar dual WIIF antenna is designed. By setting coupling slots and PCB boards on the metal frame, and using spring contacts to connect the feed point and the coupler, left and right radiation branches are formed to achieve effective signal radiation. The coupling space of the antenna is optimized by combining in-mold injection molding process.
In an all-metal device, the antenna's radiation performance and directivity have been improved, solving the space shortage problem under the narrow bezel and widescreen design, and enhancing the user experience.
Smart Images
Figure CN223942006U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of antenna technology, specifically to a metal-framed flat dual WIIF antenna. Background Technology
[0002] With the rise of the Internet of Things era, life is becoming more and more convenient. Various kinds of intelligence are also affecting people's clothing, food, housing and transportation. Antenna frequencies are also varied, and technologies such as multi-frequency integration and 5G communication are gradually entering people's lives. The popularization of tablet computers has also greatly improved the convenience and flexibility of people's lives and studies, allowing them to work and study anytime and anywhere.
[0003] Currently, most tablet computers on the market are made of plastic, and their antennas mostly use common FPC and LDS types. For devices with metal bodies, ordinary antennas cannot effectively radiate and meet the practical requirements of antenna design. Therefore, it is necessary to use the metal body itself as the antenna design. The whole device can meet the requirements in terms of structure and antenna performance, improve the texture of the device, and increase its selling points. Most of the antennas use common FPC and LDS types, but this method cannot meet the design requirements of metal bodies. Without an ideal clearance environment, the antenna radiation efficiency is poor, and the gain and directivity are poor. Utility Model Content
[0004] To address the technical deficiencies in the background technology, this utility model proposes a metal-framed flat-panel dual WIIF antenna, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows:
[0005] This utility model discloses a metal-framed planar dual WIIF antenna. The antenna is connected to one side of a metal frame and includes a PCB board. A coupling slot is provided on one side of the metal frame. The PCB board is located outside the coupling slot. Feed points and feed locations are respectively provided on the left and right sides of the PCB board. A left coupler and a right coupler are respectively provided on the metal frame outside the left and right sides of the PCB board. Both the feed point and the feed location are connected to a spring. The feed point is coupled to the left coupler through the spring to form a left radiation branch, and the feed location is coupled to the right coupler through the spring to form a right radiation branch.
[0006] As a further embodiment of this utility model, the PCB board is provided with at least two power supply points, and the metal frame is provided with at least two left coupling bodies.
[0007] As a further embodiment of this utility model, the end of the spring piece away from the PCB board is coupled to the left coupler and the right coupler through a gold-plated contact piece.
[0008] As a further embodiment of this utility model, the PCB board is connected to the motherboard via a cable to achieve signal transmission.
[0009] As a further embodiment of this utility model, the operating frequency of the left radiating branch is 5.15GHz~5.85GHz.
[0010] As a further embodiment of this utility model, the operating frequency of the right radiating branch is 2.4GHz~2.5GHz.
[0011] The beneficial effects of this utility model are as follows: The dual-band antenna integrates a frame, and by making reasonable contact between the frame and the antenna board, the coupling meets the performance requirements of dual-band WIFI. It can ensure performance to the greatest extent even when the space environment for setting the antenna inside an all-metal machine is not ideal. The antenna set on the metal frame can improve the antenna radiation direction and enhance the user experience, thereby solving the problem of insufficient space environment for antennas in narrow bezel and wide screen designs. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the antenna structure. Figure 1 .
[0013] Figure 2 This is a schematic diagram of the antenna structure. Figure 2 .
[0014] In the diagram, 1. Metal frame; 11. Left coupler; 12. Right coupler; 2. PCB board; 21. Feed point; 22. Feed location; 3. Coupling slot; 4. Spring; 5. Left radial branch; 6. Right radial branch; 7. Contact piece; 8. Cable line. Detailed Implementation
[0015] This utility model discloses a metal-framed flat dual WIIF antenna, such as... Figure 1 and Figure 2 As shown, the antenna is connected to one side of the metal frame 1, including a PCB board 2. A coupling slot 3 is provided on one side of the metal frame 1. The PCB board 2 is located outside the coupling slot 3. Feed points 21 and 22 are provided on the left and right sides of the PCB board 2, respectively. A left coupler 11 and a right coupler 12 are provided on the metal frame 1 outside the left and right sides of the PCB board 2, respectively. Both the feed point 21 and the feed point 22 are connected to spring contacts 4. The feed point 21 is coupled to the left coupler 11 through the spring contact 4 to form a left radiation branch 5. The feed point 22 is coupled to the right coupler 12 through the spring contact 4 to form a right radiation branch 6.
[0016] It should be noted that by using PCB board 2 and spring clip 4 pressed onto metal frame 1, the signal transmitted to PCB board 2 can be effectively radiated through the left radiating branch 5 and right radiating branch 6 of metal frame 1. The metal frame 1 utilizes the side opening of the whole metal body and uses in-mold injection molding process to perfectly extract the coupling space required by the antenna. It is connected to antenna PCB board 2. The left radiating branch 5 serves as the WIFI-5G radiating branch and is connected to spring clip 4 for feeding at feed point 21. The right radiating branch 6 serves as the WIFI-2.4G radiating branch and is connected to spring clip 4 for grounding at feed point 22. Through impedance matching, the required 50 ohms are achieved. Since the frame is used for radiation, fine-tuning the performance by modifying the frame is time-consuming and laborious. Both the power supply and grounding can be achieved to the optimal state of 50 ohms through impedance matching. The antenna board grounding is adjusted by parallel inductor to adjust the frequency resonance and increase its bandwidth.
[0017] This dual-band antenna integrates with the frame, and by using reasonable contact between the frame and the antenna board, the coupling meets the performance requirements of dual-band WIFI. It can ensure performance to the greatest extent even when the space environment for setting the antenna inside an all-metal machine is not ideal. The antenna set on the metal frame 1 can improve the antenna radiation direction and enhance the user experience, thereby solving the problem of insufficient space environment for antennas in narrow bezel and wide screen designs.
[0018] It needs to be further explained that, such as Figure 2 As shown, the PCB board 2 has at least two power supply points 21, and the metal frame 1 has at least two left coupling bodies 11.
[0019] Two power supply points 21 are reserved on the PCB board 2. Different power supply points 21 are connected to the corresponding left coupler 11 through the spring 4, which can facilitate the selection of power supply and better adjust the resonance.
[0020] It needs to be further explained that, such as Figure 2 As shown, the end of the spring piece 4 away from the PCB board 2 is coupled to the left coupler 11 and the right coupler 12 through a gold-plated contact piece 7.
[0021] The contact points between the spring 4 and the left coupler 11 and the right coupler 12 on the frame are connected by adding gold-plated contact pieces 7, which can make the contact between the spring 4 and the left coupler 11 and the right coupler 12 more complete.
[0022] It needs to be further explained that, such as Figure 2 As shown, the PCB board 2 is connected to the motherboard via cable 8 to achieve signal transmission.
[0023] The signal is transmitted to the PCB board 2 via the cable line 8 connected to the motherboard, so that the signal can be transmitted to the metal frame 1, and then radiated through the left radiation branch 5 and the right radiation branch 6.
[0024] It needs to be further explained that, such as Figure 1 As shown, the operating frequency of the left radiating branch 5 is 5.15GHz~5.85GHz.
[0025] Among them, the segment on the left side of the metal frame 1 that radiates signals is the WIFI-5G radiation branch, which can be designed as a branch with a length of 15mm, a width of 5mm, and a coupling groove of 35mm in the middle.
[0026] It needs to be further explained that, such as Figure 1 As shown, the operating frequency of the right radiating branch 6 is 2.4GHz~2.5GHz.
[0027] The segment on the left side of the metal frame 1 that radiates signals is the WiFi-2.4G radiation branch. It can be designed with a branch length of 15mm, a width of 5mm, a coupling groove of 35mm in the middle, and the contact point retains the edge. The frequency resonance can be adjusted by the feed point contact coupling space. The ground can also be matched to achieve the corresponding requirements without changing the length of the WiFi-2.4G physical branch, and the resonant frequency can be adjusted accordingly.
[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A metal-framed flat dual-WIIF antenna, the antenna being connected to one side of a metal frame, comprising a PCB board, characterized in that, A coupling groove is provided on one side of the metal frame. The PCB board is located outside the coupling groove. A power supply point and a ground point are provided on the left and right sides of the PCB board, respectively. A left coupler and a right coupler are provided on the metal frame outside the left and right sides of the PCB board, respectively. Both the power supply point and the ground point are connected to a spring. The power supply point is coupled to the left coupler through the spring to form a left radial branch. The ground point is coupled to the right coupler through the spring to form a right radial branch.
2. The antenna according to claim 1, characterized in that, The PCB board has at least two power supply points, and the metal frame has at least two left coupling bodies.
3. The antenna according to claim 1, characterized in that, The end of the spring piece away from the PCB board is coupled to the left and right couplers via gold-plated contact pieces.
4. The antenna according to claim 1, characterized in that, The PCB board is connected to the motherboard via a cable to transmit signals.
5. The antenna according to claim 1, characterized in that, The operating frequency of the left radiating branch is 5.15GHz~5.85GHz.
6. The antenna according to claim 1, characterized in that, The operating frequency of the right radiating branch is 2.4GHz~2.5GHz.