Metal frame antenna and mobile terminal

Abstract

The utility model provides a metal frame antenna and a mobile terminal applying the metal frame antenna, the metal frame antenna comprises a substrate, a metal middle frame, a first radiation antenna, a second radiation antenna and a ground feed assembly, the substrate is connected with the metal middle frame, the substrate is arranged on the metal middle frame, and the first radiation antenna is connected with the second radiation antenna. The first radiation antenna and the second radiation antenna are in coupling connection, and the first radiation antenna and the ground feed assembly are electrically connected to the substrate. According to the metal frame antenna, the overall radiation efficiency of the antenna can be effectively improved, the head-to-hand efficiency of the antenna can be optimized, and the overall structure of the antenna can be simplified.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, and in particular to a metal frame and a mobile terminal. Background Technology

[0002] With the continuous development of 5G base station construction, the frequency bands supported by communication terminals are also constantly expanding. Nowadays, mobile phones are commonly used mobile terminal products. With the continuous development of technology, mobile phones inevitably use 5G communication technology, which requires increasing the number of antennas in mobile phones. However, the space in mobile phones is limited, and the bandwidth of antennas is also limited by space, so the frequency bands covered by the antennas are limited, making it difficult to achieve the wide bandwidth radiation of the antennas.

[0003] Smartphones and other terminal devices are typically positioned near a user's head and hands during operation. The antennas on these devices interact with the human body, and the absorption of radiated energy by the body affects the antenna's over-the-air (OTA) performance, reducing its radiation efficiency. Therefore, studying the interaction mechanism between terminal antennas and the human body, and exploring the design principles of high-head-and-hand-efficiency terminal antennas, is of great significance to the development of terminal antenna technology. Traditional metal-frame antennas have low radiation efficiency and poor directivity. Therefore, this invention proposes a novel metal-frame antenna and a mobile terminal using this antenna. Utility Model Content

[0004] The purpose of this invention is to provide a metal frame antenna that can not only effectively improve the overall radiation efficiency of the antenna, but also optimize the antenna head-hand efficiency and simplify the overall structure of the antenna.

[0005] To solve the above-mentioned technical problems, this utility model provides a metal frame antenna, which includes a substrate, a metal middle frame, a first radiating antenna, a second radiating antenna, and a grounding assembly. The substrate is connected to the metal middle frame and is disposed on the metal middle frame. The first radiating antenna and the second radiating antenna are coupled together, and the first radiating antenna is electrically connected to the grounding assembly and the substrate.

[0006] As a further improvement of this utility model, the first radiating antenna is arranged in an L-shape, the second radiating antenna is arranged in a rectangular shape, and one end of the first radiating antenna is coupled to one end of the second radiating antenna.

[0007] As a further improvement of this utility model, one end of the first radiating antenna and one end of the second radiating antenna are coupled together to form a coupling gap, and the coupling gap is located on the side of the terminal device.

[0008] As a further improvement of this utility model, the substrate is located beside the first radiating antenna, and the first radiating antenna includes a first leg and a second leg, which are arranged perpendicularly to each other.

[0009] As a further improvement of this utility model, the grounding assembly includes a power supply point, a first grounding point, and a second grounding point. The first grounding point and the second grounding point are electrically connected to the first radiating antenna, and the power supply point is electrically connected to the second radiating antenna.

[0010] As a further improvement of this utility model, both the first grounding point and the second grounding point are configured as metal springs.

[0011] As a further improvement of this utility model, the metal frame antenna also includes a switching switch, which is electrically connected to the first radiating antenna.

[0012] As a further improvement of this utility model, the feed point is electrically connected to the second radiating antenna, which is located at the side frame of the mobile terminal.

[0013] As a further improvement of this utility model, the frequency band controlled by the first radiating antenna and the second radiating antenna is 600MHz-960MHz.

[0014] The purpose of this invention is to provide a mobile terminal that can better utilize the aforementioned metal frame antenna.

[0015] To solve the above-mentioned technical problems, the present invention provides a mobile terminal, which includes the aforementioned metal frame antenna.

[0016] This invention provides a metal-framed antenna, i.e., a mobile terminal. The metal-framed antenna includes a substrate, a metal frame, a first radiating antenna, a second radiating antenna, and a grounding assembly. The substrate is connected to and disposed on the metal frame. The first and second radiating antennas are coupled together, and the first radiating antenna is electrically connected to the grounding assembly. This metal-framed antenna not only effectively improves the overall radiation efficiency of the antenna but also optimizes its head-and-hand efficiency and simplifies its overall structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the metal frame antenna of this utility model.

[0018] The labels in the accompanying drawings are explained as follows:

[0019] First radiating antenna 10, first leg 11, second leg 12, second radiating antenna 20, substrate 30, metal frame 40, coupling gap 50, feed point 60, first ground point 70, second ground point 71. Detailed Implementation

[0020] The metal frame antenna proposed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the explanation of the embodiments of this utility model. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, different figures may emphasize different aspects and sometimes use different proportions.

[0021] Smartphones and other terminal devices are typically positioned near a user's head and hands during operation, leading to interaction between the device's antenna and the user's body. The absorption of radiated energy by the human body affects the antenna's over-the-air (OTA) performance and reduces its radiation efficiency. Researching the interaction mechanism between terminal antennas and the human body, and exploring the design principles of high-head-and-hand-efficiency terminal antennas, is of great significance to the development of terminal antenna technology. Traditional metal-frame antennas have low radiation efficiency and poor directivity. Therefore, this invention proposes a novel metal-frame antenna and a mobile terminal using this antenna. This mobile terminal includes smartphones, tablets, laptops, etc.

[0022] like Figure 1 As shown, this utility model provides a metal frame antenna, which includes a substrate 30, a metal middle frame 40, a first radiating antenna 10, a second radiating antenna 20, and a grounding assembly. The substrate 30 is connected to the metal middle frame 40 and is disposed on the metal middle frame 40. The first radiating antenna 10 and the second radiating antenna 20 are coupled together, and the first radiating antenna 10 is electrically connected to the grounding assembly on the substrate 30.

[0023] With this design, the metal frame antenna of this invention not only effectively improves the overall radiation efficiency of the antenna, but also optimizes the antenna's head-and-hand efficiency and simplifies the overall structure. Furthermore, the metal frame antenna of this invention has high radiation efficiency and significantly improved antenna radiation directivity.

[0024] Furthermore, the first radiating antenna 10 is L-shaped, and the second radiating antenna 20 is rectangular, with one end of the first radiating antenna 10 coupled to one end of the second radiating antenna 20. This configuration, with the first radiating antenna 10 in an L-shape, enables multi-band operation because its asymmetrical structure can excite current paths of different lengths, corresponding to different resonant frequencies. The second radiating antenna 20, being rectangular, may cover a specific frequency band, such as low frequencies, while the L-shaped branches extend the high-frequency band through coupling. The coupling connection between the first radiating antenna 10 and the second radiating antenna 20 introduces additional coupled resonance, thereby further widening the bandwidth or increasing the frequency band.

[0025] Specifically, one end of the first radiating antenna 10 and one end of the second radiating antenna 20 are coupled together to form a coupling gap 50, which is located on the side of the terminal device. This configuration enhances high-frequency bandwidth and multi-band coverage. The coupling gap 50 acts as a distributed coupling capacitor, introducing additional resonant paths. The currents of the first radiating antenna 10 and the second radiating antenna 20 are coupled through the gap, which can excite new high-frequency resonant modes, thus expanding the available bandwidth of the antennas.

[0026] Preferably, the substrate 30 is located beside the first radiating antenna 10, which includes a first leg 11 and a second leg 12, the first leg 11 and the second leg 12 being arranged perpendicularly to each other. The grounding assembly includes a feed point 60, a first ground point 70 and a second ground point 71, the first ground point 70 and the second ground point 71 being electrically connected to the first radiating antenna 10, and the feed point 60 being electrically connected to the second radiating antenna 20.

[0027] Preferably, both the first grounding point 70 and the second grounding point 71 are configured as metal spring contacts. This configuration, through a combination of mechanical elasticity and electrical performance, overcomes the limitations of traditional grounding methods in high-frequency, mobile, and harsh environments, effectively improving the overall reliability, radiation efficiency, and anti-interference capability of the antenna system.

[0028] Furthermore, the metal frame antenna also includes a switching switch, which is electrically connected to the first radiating antenna 10. This configuration, with the introduction of the switching switch, upgrades the metal frame antenna from a fixed design to a reconfigurable system. By dynamically adjusting parameters such as frequency band, frequency scheme, and radiation pattern, the antenna's applicability, energy efficiency, and reliability in complex scenarios are significantly improved.

[0029] The feed point 60 is electrically connected to the second radiating antenna 20, which is located on the side frame of the mobile terminal. This configuration, placing the rectangular antenna directly connected to the feed point 60 on the side frame, significantly improves the communication capabilities of the mobile terminal in 5G / millimeter-wave scenarios through efficient space utilization, optimized high-frequency performance, avoidance of human interference, and multi-antenna collaboration. It is a key design feature addressing the compactness and high-frequency requirements of modern terminals. Preferably, the first radiating antenna 10 and the second radiating antenna 20 are configured to control a frequency band range of 600MHz-960MHz.

[0030] In summary, this utility model provides a metal-framed antenna and a mobile terminal. The metal-framed antenna includes a substrate 30, a metal frame 40, a first radiating antenna 10, a second radiating antenna 20, and a grounding assembly. The substrate 30 is connected to and disposed on the metal frame 40. The first radiating antenna 10 and the second radiating antenna 20 are coupled together, and the first radiating antenna 10 is electrically connected to the grounding assembly on the substrate 30. This metal-framed antenna not only effectively improves the overall radiation efficiency of the antenna but also optimizes its head-and-hand efficiency and simplifies its overall structure.

[0031] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually. In addition, the different parts between embodiments can also be combined with each other, and this utility model does not limit this.

[0032] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A metal frame antenna, characterized in that: The metal frame antenna includes a substrate, a metal middle frame, a first radiating antenna, a second radiating antenna, and a grounding assembly. The substrate is connected to the metal middle frame and is disposed on the metal middle frame. The first radiating antenna and the second radiating antenna are coupled together, and the first radiating antenna is electrically connected to the grounding assembly.

2. The metal frame antenna according to claim 1, characterized in that: The first radiating antenna is L-shaped, and the second radiating antenna is rectangular. One end of the first radiating antenna is coupled to one end of the second radiating antenna.

3. The metal frame antenna according to claim 2, characterized in that: One end of the first radiating antenna is coupled to one end of the second radiating antenna to form a coupling gap, which is located on the side of the terminal device.

4. The metal frame antenna according to claim 3, characterized in that: The substrate is located beside the first radiating antenna, which includes a first leg and a second leg, and the first leg and the second leg are arranged perpendicular to each other.

5. The metal frame antenna according to claim 4, characterized in that: The grounding assembly includes a power feed point, a first grounding point, and a second grounding point. The first grounding point and the second grounding point are electrically connected to the first radiating antenna, and the power feed point is electrically connected to the second radiating antenna.

6. The metal frame antenna according to claim 5, characterized in that: Both the first grounding point and the second grounding point are configured as metal spring contacts.

7. The metal frame antenna according to claim 6, characterized in that: The metal frame antenna also includes a switching switch, which is electrically connected to the first radiating antenna.

8. The metal frame antenna according to claim 7, characterized in that: The feed point is electrically connected to the second radiating antenna, which is located at the side frame of the mobile terminal.

9. The metal frame antenna according to claim 8, characterized in that: The frequency band controlled by the first radiating antenna and the second radiating antenna is 600MHz-960MHz.

10. A mobile terminal, characterized in that: The mobile terminal includes the metal frame antenna as described in any one of claims 1-9.

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