5G antenna structure and mobile terminal

Abstract

The present invention provides a 5G antenna structure and a mobile terminal. The 5G antenna structure includes a metal floor and ten antenna segments arranged in sequence around the metal floor. The first antenna and the sixth antenna are arranged centrally symmetrically with respect to the center of the metal floor. The second antenna and the seventh antenna are arranged centrally symmetrically with respect to the center of the metal floor. The third antenna and the eighth antenna are arranged centrally symmetrically with respect to the center of the metal floor. The fourth antenna and the ninth antenna are arranged centrally symmetrically with respect to the center of the metal floor. The fifth antenna and the tenth antenna are arranged centrally symmetrically with respect to the center of the metal floor. The 5G antenna structure and the mobile terminal provided by the present invention can uniformly excite the current on the metal floor. The more uniform the current distribution on the floor, the lower the corresponding SAR value. The lower the SAR value, the smaller the radiation to the human body. Therefore, the use of this antenna structure can reduce the radiation to the human body.

Description

Technical Field

[0001] The present invention belongs to the field of antenna technology, and more specifically, relates to a 5G antenna structure and a mobile terminal. Background Art

[0002] 5G network, or the fifth generation mobile communication network (5th generation mobile networks or 5th generation wireless systems, referred to as 5G), is the latest generation of cellular mobile communication technology. Its performance goals are high data rate, reduced latency, energy saving, reduced costs, increased system capacity and large-scale device connection. Its main advantage is that the data transmission rate is much higher than previous cellular networks, up to 10 Gbit / s, 100 times faster than 4G. One of the core technologies of 5G mobile communication is the large-scale application of MIMO antenna technology.

[0003] With the continuous development of communication technology, especially in the use of mobile terminals, people are more or less worried about the problem of electromagnetic radiation. However, current mobile terminals do not consider the radiation problem to the human body. Summary of the invention

[0004] The purpose of the present invention is to provide a 5G antenna structure to solve the technical problem in the prior art that mobile terminal antennas generate radiation to the human body.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a 5G antenna structure, including a metal floor and ten antenna segments arranged in sequence around the metal floor, the ten antenna segments are respectively a first antenna, a second antenna, a third antenna, a fourth antenna, a fifth antenna, a sixth antenna, a seventh antenna, an eighth antenna, a ninth antenna and a tenth antenna; the first antenna and the sixth antenna are arranged in a centrally symmetrical manner with respect to the center of the metal floor, and the communication frequency band of the first antenna and the sixth antenna is 1.71 GHz to 2.69 GHz, the second antenna and the seventh antenna are arranged in a centrally symmetrical manner with respect to the center of the metal floor, and the communication frequency band of the second antenna and the seventh antenna is 1.71 GHz to 2.69 GHz, The frequency band is 3.3MHz to 3.8GHz and 4.8MHz to 5GHz, the third antenna and the eighth antenna are centrally symmetrically arranged with respect to the center of the metal floor, and the communication frequency band of the third antenna and the eighth antenna is 2.4GHz and 5.8GHz, the fourth antenna and the ninth antenna are centrally symmetrically arranged with respect to the center of the metal floor, and the communication frequency band of the fourth antenna and the ninth antenna is 0.7GHz to 1GHz, the fifth antenna and the tenth antenna are centrally symmetrically arranged with respect to the center of the metal floor, and the communication frequency band of the fifth antenna and the tenth antenna is 3.3MHz to 3.8GHz and 4.8MHz to 5GHz.

[0006] In one embodiment, the fourth antenna and the ninth antenna are both arranged along the length direction of the metal floor, and the lengths of the fourth antenna and the ninth antenna are 60 mm to 90 mm.

[0007] In one embodiment, the fifth antenna and the tenth antenna are arranged along the length direction of the metal floor, and the lengths of the fifth antenna and the tenth antenna are 5 mm to 18 mm.

[0008] In one embodiment, the first antenna and the sixth antenna are both arranged along the width direction of the metal floor, and the lengths of the first antenna and the sixth antenna are 45 mm to 60 mm.

[0009] In one embodiment, the second antenna and the seventh antenna are both arranged along the width direction of the metal floor, and the lengths of the second antenna and the seventh antenna are 10 mm to 15 mm.

[0010] In one embodiment, the third antenna and the eighth antenna are both arranged along the width direction of the metal floor, and the lengths of the third antenna and the eighth antenna are 10 mm to 15 mm.

[0011] In one embodiment, at least one of the antenna segments extends toward the metal floor and is formed with a metal branch.

[0012] In one embodiment, the distance between two adjacent antenna segments is 1 mm to 2 mm.

[0013] In one embodiment, the antenna segment is a monopole antenna, a PIFA antenna, an IFA antenna or a loop antenna.

[0014] An embodiment of the present invention also provides a mobile terminal, comprising a substrate and the above-mentioned 5G antenna structure, wherein the 5G antenna structure is arranged on the substrate.

[0015] The beneficial effect of the 5G antenna structure and mobile terminal provided by the present invention is that: compared with the prior art, the 5G antenna structure of the present invention includes a metal floor and ten antenna segments surrounding the metal floor. The communication frequency band of the first antenna and the sixth antenna is 1.71GHz to 2.69GHz, covering the medium and high frequencies of the 4G frequency band; the communication frequency band of the second antenna and the seventh antenna and the fifth antenna and the tenth antenna is 3.3MHz to 3.8GHz and 4.8MHz to 5GHz, covering the 5G communication frequency band; the communication frequency band of the third antenna and the eighth antenna is 2.4GHz and 5.8GHz, covering the wifi frequency band; the communication frequency band of the fourth antenna and the ninth antenna is 0.7GHz to 1GHz, covering the low frequency of the 4G frequency band. The first antenna and the sixth antenna, the second antenna and the seventh antenna, the third antenna and the eighth antenna, the fourth antenna and the ninth antenna, the fifth antenna and the tenth antenna are all symmetrically arranged with the center of the metal floor, which can evenly excite the current on the metal floor. The more uniform the current distribution on the metal floor, the lower the corresponding SAR value, and the lower the SAR value, the smaller the radiation to the human body. Therefore, using this antenna structure can reduce radiation to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A structural diagram of a 5G antenna structure provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of current distribution simulation on a metal floor at 1 GHz for a 5G antenna structure provided in an embodiment of the present invention;

[0019] Figure 3 Schematic diagram of current distribution simulation on the metal floor at 1 GHz for comparing antenna solutions.

[0020] Among them, the reference numerals in the figure are:

[0021] 1-metal floor; 21-first antenna; 22-second antenna; 23-third antenna; 24-fourth antenna; 25-fifth antenna; 26-sixth antenna; 27-seventh antenna; 28-eighth antenna; 29-ninth antenna; 20-tenth antenna. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] The 5G antenna structure provided in an embodiment of the present invention is now described.

[0027] See also Figure 1In one embodiment of the 5G antenna structure, the 5G antenna structure includes a metal floor 1 and ten antenna segments, the ten antenna segments are arranged around the circumference of the metal floor 1, and the ten antenna segments are respectively a first antenna 21, a second antenna 22, a third antenna 23, a fourth antenna 24, a fifth antenna 25, a sixth antenna 26, a seventh antenna 27, an eighth antenna 28, a ninth antenna 29 and a tenth antenna 20, and are arranged in sequence around the circumference of the metal floor 1 in the above order. It is assumed that the geometric center of the metal floor 1 is the center point of the 5G antenna structure. The first antenna 21 and the sixth antenna 26 are arranged symmetrically about the center point, for example, the first antenna 21 is arranged at the upper left of the metal floor 1, and the sixth antenna 26 is arranged at the lower right of the metal floor 1. The communication frequency band covered by the first antenna 21 and the sixth antenna 26 is 1.71 GHz to 2.69 GHz, covering the middle and high frequencies of the 4G frequency band. The second antenna 22 and the seventh antenna 27 are arranged symmetrically with respect to the center point. The communication frequency bands covered by the second antenna 22 and the seventh antenna 27 are 3.3MHz to 3.8GHz and 4.8MHz to 5GHz, covering the 5G frequency band. The third antenna 23 and the eighth antenna 28 are arranged symmetrically with respect to the center point. The communication frequency bands of the third antenna 23 and the eighth antenna 28 are 2.4GHz and 5.8GHz, just covering the wifi frequency band. The fourth antenna 24 and the ninth antenna 29 are arranged symmetrically with respect to the center point. The communication frequency bands of the fourth antenna 24 and the ninth antenna 29 are 0.7GHz to 1GHz, covering the low frequency of the 4G frequency band. The fifth antenna 25 and the tenth antenna 20 are arranged symmetrically with respect to the center line point. The communication frequency bands of the fifth antenna 25 and the tenth antenna 20 are 3.3MHz to 3.8GHz and 4.8MHz to 5GHz, also covering the 5G communication frequency band. The first antenna 21 and the sixth antenna 26, the second antenna 22 and the seventh antenna 27, the third antenna 23 and the eighth antenna 28, the fourth antenna 24 and the ninth antenna 29, the fifth antenna 25 and the tenth antenna 20 are all arranged symmetrically with respect to the center of the metal floor 1, especially the fourth antenna 24 and the ninth antenna 29, the fourth antenna 24 and the ninth antenna 29 are larger in size and have a greater impact on the metal floor 1. The above antenna segments are all arranged symmetrically with respect to the center, and can evenly excite the current on the metal floor 1. The more uniform the current distribution on the floor, the lower the corresponding SAR value. The lower the SAR value, the lower the radiation to the human body. In summary, the 5G antenna structure in this embodiment can cover 0.7-1GHz (2MIMO), 1.71-2.69GHz (2MIMO), 3.3-3.6GHz and 4.3-5.0GHz (4MIMO) of 5G, and can cover all frequency bands of 2 / 3 / 4 / 5GHz, realize MIMO antenna system, and can cover dual MIMO of wifi frequency bands at the same time. Under the premise of increasing the number of antennas, a lower SAR value can also be guaranteed.

[0028] Among them, the SAR value is the specific absorption rate, which is the differential value of the energy absorbed by the mass element in the volume element of a given density over time. It actually refers to the electromagnetic energy absorbed per unit time and per unit biological mass, and the unit is W / kg. It measures the strength of the mobile phone antenna's radiation to the human body. The lower the SAR value, the lower the radiation to the human body. Under the premise of ensuring other performance of the mobile phone antenna, low SAR value antenna is an important focus during design.

[0029] The 5G antenna structure of the above embodiment includes a metal floor 1 and ten antenna segments surrounding the metal floor 1. The communication frequency band of the first antenna 21 and the sixth antenna 26 is 1.71 GHz to 2.69 GHz, covering the medium and high frequencies of the 4G frequency band; the communication frequency band of the second antenna 22 and the seventh antenna 27 and the fifth antenna 25 and the tenth antenna 20 is 3.3 MHz to 3.8 GHz and 4.8 MHz to 5 GHz, covering the 5G communication frequency band; the communication frequency band of the third antenna 23 and the eighth antenna 28 is 2.4 GHz and 5.8 GHz, covering the wifi frequency band; the communication frequency band of the fourth antenna 24 and the ninth antenna 29 is 0.7 GHz to 1 GHz, covering the low frequency of the 4G frequency band. The first antenna 21 and the sixth antenna 26, the second antenna 22 and the seventh antenna 27, the third antenna 23 and the eighth antenna 28, the fourth antenna 24 and the ninth antenna 29, the fifth antenna 25 and the tenth antenna 20 are all symmetrically arranged around the center of the metal floor 1, and can evenly excite the current on the metal floor 1. The more evenly the current distribution on the metal floor 1 is, the lower the corresponding SAR value is. The lower the SAR value is, the less radiation to the human body is. Therefore, the use of this antenna structure can reduce radiation to the human body.

[0030] See also Figure 1 In one embodiment of the 5G antenna structure, the fourth antenna 24 and the ninth antenna 29 are both arranged along the length direction of the metal floor 1. Since the antenna frequency band covered by the fourth antenna 24 and the ninth antenna 29 is 0.7 GHz to 1 GHz, the frequency of the antenna frequency band is relatively low, and the corresponding sizes of the fourth antenna 24 and the ninth antenna 29 are relatively large. In this way, the fourth antenna 24 and the ninth antenna 29 are arranged along the length direction of the metal floor 1, so that the length direction of the metal floor 1 is consistent with the length direction of the fourth antenna 24 and the ninth antenna 29, reducing the overall area of ​​the 5G antenna structure, and also enabling the fourth antenna 24 and the ninth antenna 29 to sufficiently excite the metal floor 1, thereby making the current excitation distribution of the metal floor 1 more uniform.

[0031] Furthermore, the length of the fourth antenna 24 and the ninth antenna 29 is 60 mm to 90 mm, so that the corresponding covered frequency can be between 0.7 GHz and 1 GHz. The length of the fourth antenna 24 and the ninth antenna 29 can be selected to be the same, so that the excitation of the metal floor 1 by both of them is more symmetrical, such as the length of the fourth antenna 24 and the ninth antenna 29 are both 70 mm, 80 mm or 90 mm. The length of the fourth antenna 24 and the ninth antenna 29 can also be selected to be different, both between 60 mm and 90 mm, such as the length of the fourth antenna 24 is 70 mm, and the length of the ninth antenna 29 is 75 mm.

[0032] See also Figure 1 In one embodiment of the 5G antenna structure, the fifth antenna 25 and the tenth antenna 20 are both arranged along the length direction of the metal floor 1, and the length of the fifth antenna 25 and the tenth antenna 20 is 5mm to 18mm. When the 5G antenna structure is used in a mobile phone, the length of the mobile phone is about 160mm, the width of the mobile phone is about 80mm, and after the fourth antenna 24 and the ninth antenna 29 are arranged in the length direction of the mobile phone, there is still space left to arrange the fifth antenna 25 and the tenth antenna 20, so that the layout of the 5G antenna structure is more compact. It can also make the fourth antenna 24 and the ninth antenna 29 sufficiently excite the metal floor 1, so that the current excitation distribution of the metal floor 1 is more uniform. The length of the fifth antenna 25 and the tenth antenna 20 is 5mm to 18mm, so that the frequency band covered is 3.3MHz to 3.8GHz and 4.8MHz to 5GHz, reaching the 5G working frequency band. The lengths of the fifth antenna 25 and the tenth antenna 20 may be selected to be the same, so that the excitation of the metal floor 1 by the two antennas is more symmetrical, such as the lengths of the fifth antenna 25 and the tenth antenna 20 are both 12 mm, 14 mm or 16 mm. The lengths of the fifth antenna 25 and the tenth antenna 20 may also be selected to be different, both between 5 mm and 18 mm, such as the length of the fourth antenna 24 is 13 mm, and the length of the ninth antenna 29 is 15 mm.

[0033] See also Figure 1 In one embodiment of the 5G antenna structure, the first antenna 21 and the sixth antenna 26 are both arranged along the width direction of the metal floor 1, and the length of the first antenna 21 and the sixth antenna 26 is 45mm to 60mm, so that the frequency band covered by the first antenna 21 and the sixth antenna 26 is between 1.71GHz and 2.69GHz. The lengths of the first antenna 21 and the sixth antenna 26 can be selected to be the same, so that the excitation of the metal floor 1 by both of them is more symmetrical, such as the lengths of the first antenna 21 and the sixth antenna 26 are both 45mm, 50mm or 60mm. The lengths of the first antenna 21 and the sixth antenna 26 can also be selected to be different, both between 45mm and 60mm, such as the length of the first antenna 21 is 55mm, and the length of the sixth antenna 26 is 58mm.

[0034] See also Figure 1 In one embodiment of the 5G antenna structure, the second antenna 22 and the seventh antenna 27 are both arranged along the width direction of the metal floor 1, and the lengths of the second antenna 22 and the seventh antenna 27 are 10mm to 15mm, so that the frequency bands covered by the second antenna 22 and the seventh antenna 27 are 3.3MHz to 3.8GHz and 4.8MHz to 5GHz, covering the 5G frequency band. The lengths of the second antenna 22 and the seventh antenna 27 can be selected to be the same, so that the excitation of the metal floor 1 by both of them is more symmetrical, such as the lengths of the second antenna 22 and the seventh antenna 27 are both 10mm, 12mm or 15mm. The lengths of the second antenna 22 and the seventh antenna 27 can also be selected to be different, both between 10mm and 15mm, such as the length of the second antenna 22 is 13mm, and the length of the seventh antenna 27 is 14mm.

[0035] See also Figure 1 In one embodiment of the 5G antenna structure, the third antenna 23 and the eighth antenna 28 are both arranged along the width direction of the metal floor 1, and the length of the third antenna 23 and the eighth antenna 28 is 10mm to 15mm, so that the frequency bands covered by the second antenna 22 and the seventh antenna 27 are 2.4GHz and 5.8GHz, covering the wifi frequency band. The lengths of the third antenna 23 and the eighth antenna 28 can be selected to be the same, so that the excitation of the metal floor 1 by both is more symmetrical, such as the lengths of the third antenna 23 and the eighth antenna 28 are both 10mm, 12mm or 15mm. The lengths of the third antenna 23 and the eighth antenna 28 can also be selected to be different, both between 10mm and 15mm, such as the length of the third antenna 23 is 13mm, and the length of the eighth antenna 28 is 14mm.

[0036] Where, SAR=σ|E| 2 / ρ, 𝜎 represents the dielectric constant of tissue fluid, 𝜌 represents the density of liquid. Furthermore, according to Maxwell's equations, for metal radiators (antennas), the magnetic field is large where the current is large, and the corresponding electric field is small. Therefore, the electric field E is large where the current is small, and the SAR value is high. Therefore, the key to reducing the SAR value is to try to evenly distribute the current and avoid areas with too small current.

[0037] In one embodiment, the metal floor 1 has a first wide side, a first long side, a second wide side and a second long side connected in sequence, the first antenna 21, the second antenna 22 and the third antenna 23 are arranged in sequence on the first wide side, the fourth antenna 24 and the fifth antenna 25 are arranged in sequence on the first long side, the sixth antenna 26, the seventh antenna 27 and the eighth antenna 28 are arranged in sequence on the second wide side, and the ninth antenna 29 and the tenth antenna 20 are arranged in sequence on the second long side. Figure 2 , Figure 2This is a schematic diagram of the current distribution simulation on the metal floor 1 at 1 GHz in this embodiment. The direction of the arrow in the figure is the direction of the current. From red to blue, it means that the current is getting smaller and smaller.

[0038] See also Figure 3 , Figure 3 The antenna structure used in Figure 2 The difference between the antenna structures used in Figure 2 The first antenna 21, the second antenna 22 and the third antenna 23 in the embodiment adopted are interchanged with the fourth antenna 24 as a whole, destroying the central symmetric arrangement of the antennas in the embodiment. Figure 3 This is a schematic diagram of the current distribution simulation of the above structure on the metal floor 1 at 1 GHz. The direction of the arrow in the figure is the direction of the current. From red to blue, it means that the current is getting smaller and smaller. Figure 2 and Figure 3 It is obvious from the comparison that Figure 2 The current distribution on the metal floor 1 is more uniform. Figure 3 There is a strong current distribution only around the metal floor 1, and the current distribution in the center of the metal floor 1 is very weak. According to the understanding of the SAR formula, we can know that Figure 2 The SAR value corresponding to the adopted embodiment must be higher. Through testing, it is found that Figure 2 The SAR value of the corresponding antenna distribution is 0.8W / kg. Figure 3 The corresponding SAR value is 3.04 W / kg. It can be seen that, under the premise of ensuring coverage of the required frequency band, the SAR value of the antenna structure of the embodiment of the present invention is significantly reduced.

[0039] In one embodiment of the 5G antenna structure, at least one antenna segment extends toward the metal floor 1 to form a metal branch. Since there is a gap between the metal floor 1 and each antenna segment, the metal branch is arranged at the gap to assist the corresponding antenna segment connected thereto to achieve corresponding bandwidth coverage. The metal branch can be manufactured by LDS technology.

[0040] See also Figure 1 In one embodiment of the 5G antenna structure, the spacing between adjacent antenna segments is 1 mm to 2 mm. Moreover, the types of the antenna segments are not limited here, and the types of the antenna segments can be the same or different, such as monopole antenna, PIFA antenna, IFA antenna or loop antenna.

[0041] The embodiment of the present invention further provides a mobile terminal, which includes the 5G antenna structure in any of the above embodiments, and also includes a substrate, which can be a non-metallic material such as plastic, and the 5G antenna structure is processed on the substrate by LDS. The mobile terminal can be a mobile phone, a tablet, etc. For example, when the mobile terminal is a mobile phone, the substrate is a plastic bracket; or the 5G antenna structure is a metal frame of the mobile phone, and the antenna segments are connected by plastic breakpoints.

[0042] The mobile terminal of the above embodiment adopts the above 5G antenna structure. The first antenna 21 and the sixth antenna 26, the second antenna 22 and the seventh antenna 27, the third antenna 23 and the eighth antenna 28, the fourth antenna 24 and the ninth antenna 29, the fifth antenna 25 and the tenth antenna 20 are all symmetrically arranged around the center of the metal floor 1, which can evenly excite the current on the metal floor 1. The more evenly the current distribution on the floor is, the lower the corresponding SAR value is. The lower the SAR value is, the less radiation to the human body is. Therefore, the use of this antenna structure can reduce radiation to the human body.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. 5G antenna structure, characterized by: It includes a metal floor and ten antenna segments arranged in sequence around the metal floor, the ten antenna segments are respectively a first antenna, a second antenna, a third antenna, a fourth antenna, a fifth antenna, a sixth antenna, a seventh antenna, an eighth antenna, a ninth antenna and a tenth antenna; the first antenna and the sixth antenna are arranged centrally symmetrically with respect to the center of the metal floor, and the communication frequency bands of the first antenna and the sixth antenna are 1.71 GHz to 2.69 GHz, the second antenna and the seventh antenna are arranged centrally symmetrically with respect to the center of the metal floor, and the communication frequency bands of the second antenna and the seventh antenna are 3.3 MHz to 3.8 GHz and 4.8 MHz to 5 GHz, the third antenna and the eighth antenna are arranged centrally symmetrically with respect to the center of the metal floor, and the communication frequency bands of the third antenna and the eighth antenna are 2.4 GHz and 5.8 GHz, the fourth antenna and the ninth antenna are arranged centrally symmetrically with respect to the center of the metal floor, and the communication frequency bands of the fourth antenna and the ninth antenna are 0.7 GHz to 1 GHz The fifth antenna and the tenth antenna are centrally symmetrically arranged with respect to the center of the metal floor, and the communication frequency bands of the fifth antenna and the tenth antenna are 3.3 MHz to 3.8 GHz and 4.8 MHz to 5 GHz; the fourth antenna and the ninth antenna are both arranged along the length direction of the metal floor, and the lengths of the fourth antenna and the ninth antenna are 60 mm to 90 mm; the fifth antenna and the tenth antenna are arranged along the length direction of the metal floor, and the lengths of the fifth antenna and the tenth antenna are 5 mm to 18 mm; the first antenna and the sixth antenna are both arranged along the width direction of the metal floor, and the lengths of the first antenna and the sixth antenna are 45 mm to 60 mm; the second antenna and the seventh antenna are both arranged along the width direction of the metal floor, and the lengths of the second antenna and the seventh antenna are 10 mm to 15 mm; the third antenna and the eighth antenna are both arranged along the width direction of the metal floor, and the lengths of the third antenna and the eighth antenna are 10 mm to 15 mm.

2. The 5G antenna structure according to any one of claims 1, characterized in that: At least one of the antenna segments extends toward the metal floor and is formed with a metal branch.

3. The 5G antenna structure according to any one of claims 1, characterized in that: The distance between two adjacent antenna segments is 1 mm to 2 mm.

4. The 5G antenna structure according to any one of claims 1, characterized in that: The antenna segment is a monopole antenna, a PIFA antenna, an IFA antenna or a loop antenna.

5. A mobile terminal, characterized in that: It comprises a substrate and the 5G antenna structure according to any one of claims 1 to 4, wherein the 5G antenna structure is arranged on the substrate.

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