Terminal antenna for reducing SAR (Synthetic Aperture Radar) value and mobile terminal

Abstract

The utility model provides a terminal antenna capable of reducing an SAR value and a mobile terminal. The terminal antenna capable of reducing the SAR value comprises a feeding point, a grounding point, a first radiation area, a second radiation area and a third radiation area. The third radiation area is electrically connected with the feeding point, and the second radiation area is electrically connected with the grounding point; the second radiation area is provided with a first gap, the third radiation area is provided with a second gap, and the first gap and the second gap are mutually coupled; one end of the first gap is located between the feeding point and the grounding point and extends towards the second radiation area, and the second gap is located beside the feeding point. The terminal antenna capable of reducing the SAR value not only can simplify the antenna structure and reduce devices for testing an SAR value sensor, but also can improve the radiation performance of the antenna.

Description

Technical Field

[0001] The utility model relates to the technical field of communication, and in particular to a terminal antenna and a mobile terminal for reducing SAR value. Background Art

[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 will inevitably use 5G communication technology, which requires the number of antennas in mobile phones to be increased. However, the space of mobile phones is limited, and the bandwidth of antennas is also limited by space, so the frequency band covered by antennas is limited, making it difficult to achieve the bandwidth radiation of antennas.

[0003] Since the birth of 802.11b to the current 802.11ax, WiFi technology has been upgraded every four to five years. Each update involves a technological change. Changes to WiFi antennas have put higher and higher requirements on the performance of GPS and WiFi antennas. Especially for the WiFi version of PAD, only the WiFi antenna transmits signals. Therefore, the antenna is required to have good performance to meet signal transmission. The antenna is also required to meet the SAR requirements. In order to control project costs in most current projects, the SAR sensor of the three-in-one antenna is omitted. This reduces the overall radiation performance of the antenna.

[0004] In view of this, it is indeed necessary for the present invention to propose a terminal antenna for reducing the SAR value and a mobile terminal using the terminal antenna. Utility Model Content

[0005] The purpose of the utility model is to provide a terminal antenna for reducing the SAR value, which can not only simplify the antenna structure and reduce the components of the SAR value sensor for testing, but also improve the radiation performance of the antenna.

[0006] To solve the above technical problems, the utility model provides a terminal antenna for reducing the SAR value, the terminal antenna for reducing the SAR value comprising a feeding point, a grounding point, a first radiation area, a second radiation area and a third radiation area; the third radiation area is electrically connected to the feeding point, and the second radiation area is electrically connected to the grounding point; a first slot is provided on the second radiation area, a second slot is provided on the third radiation area, and the first slot and the second slot are coupled to each other; one end of the first slot is located between the feeding point and the grounding point, and extends to the second radiation area, and the second slot is located next to the feeding point.

[0007] As a further improvement of the present invention, the first slot is L-shaped, and one end of the first slot extends from between the feeding point and the grounding point to the end of the first radiation area.

[0008] As a further improvement of the present invention, the second slit is L-shaped, and the second slit is opened from an end of the third radiation area and extends to the other end close to the third radiation area.

[0009] As a further improvement of the present invention, the first radiation area, the second radiation area and the third radiation area are connected in sequence to form an IFA antenna.

[0010] As a further improvement of the present invention, the first radiation area, the second radiation area and the third radiation area are all configured as IFA radiation antennas.

[0011] As a further improvement of the present invention, the first radiation area is configured as a radiation branch of the GPS frequency band; the second radiation area is configured as a radiation branch of the WiFi frequency band; and the third radiation area is configured as a radiation branch of the 2.4G WiFi frequency band and the BT frequency band.

[0012] As a further improvement of the present invention, the first slot and the second slot are coupled to generate a bandwidth of the 5G WiFi frequency band.

[0013] As a further improvement of the present invention, the width of the first gap and the second gap is in the range of 1.5 mm±0.1.

[0014] As a further improvement of the present invention, the coupling spacing between the first gap and the second gap is in the range of 1 mm-2 mm.

[0015] The utility model also aims to provide a mobile terminal to better apply the terminal antenna for reducing the SAR value.

[0016] In order to solve the above technical problem, the utility model provides a mobile terminal, wherein the mobile terminal comprises the above-mentioned terminal antenna for reducing the SAR value.

[0017] The utility model provides a terminal antenna and a mobile terminal for reducing SAR value, wherein the terminal antenna for reducing SAR value comprises a feeding point, a grounding point, a first radiation area, a second radiation area and a third radiation area; the third radiation area is electrically connected to the feeding point, and the second radiation area is electrically connected to the grounding point; a first slot is provided on the second radiation area, and a second slot is provided on the third radiation area, and the first slot and the second slot are coupled to each other; one end of the first slot is located between the feeding point and the grounding point, and extends toward the second radiation area, and the second slot is located beside the feeding point. The terminal antenna for reducing SAR value of the utility model can not only simplify the antenna structure and reduce the components for testing the SAR value sensor, but also improve the radiation performance of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the terminal antenna for reducing the SAR value of the utility model.

[0019] Figure 2 Schematic diagram of the structure of a traditional terminal antenna.

[0020] Figure 3 This is a schematic diagram of the S11 parameters of the terminal antenna for reducing the SAR value of the utility model.

[0021] Figure 4 Schematic diagram of S11 parameters of a traditional terminal antenna.

[0022] The descriptions of the reference numerals are as follows:

[0023] A first radiation area 10 , a second radiation area 20 , a third radiation area 30 , a first slot 21 , a second slot 31 , a feeding point 32 , and a grounding point 22 . DETAILED DESCRIPTION

[0024] The following is a further detailed description of the terminal antenna for reducing the SAR value proposed by the utility model and the mobile terminal using the antenna in combination with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model. In addition, the structure shown in the accompanying drawings is often a part of the actual structure. In particular, the emphasis of each accompanying drawing is different, and sometimes different proportions are used.

[0025] SAR in mobile terminals refers to the electromagnetic wave absorption ratio or specific absorption rate. It is the electromagnetic wave energy absorption ratio of mobile phones or wireless products, which is defined as: under the action of external electromagnetic fields, an induced electromagnetic field will be generated in the human body. Since various organs of the human body are lossy media, the electromagnetic field in the body will generate currents, resulting in the absorption and dissipation of electromagnetic energy. SAR is often used in biodosimetry to characterize this physical process. That is, the wireless electromagnetic energy generated by the mobile terminal is used to measure how much electromagnetic wave radiation the human body absorbs through test equipment. WiFi technology undergoes an upgrade every few years, and each update will involve a technological change. The change to WiFi antennas is that the bandwidth is getting wider and the frequency is getting higher. With the development of mobile terminals and the Internet of Things, the performance requirements for GPS and WiFi antennas are getting higher and higher. Therefore, the antenna not only requires good performance to meet signal transmission, but also requires the antenna to meet the requirements of SAR. In most current projects, in order to control project costs, the SAR sensor of the three-in-one antenna will be omitted. This will reduce the performance of the antenna.

[0026] like Figure 1 As shown, in order to solve the above technical problems, the utility model provides a terminal antenna that reduces the SAR value. The terminal antenna is attached to a mobile phone case and is installed in a corner of the case. The solution is designed in this way that the WiFi antenna is located at this position with a better clearance environment, which is beneficial to the antenna performance.

[0027] Specifically, the terminal antenna for reducing the SAR value includes a feeding point 32, a grounding point 22, a first radiation area 10, a second radiation area 20 and a third radiation area 30; the third radiation area 30 is electrically connected to the feeding point 32, and the second radiation area 20 is electrically connected to the grounding point 22; a first slot 21 is provided on the second radiation area 20, and a second slot 31 is provided on the third radiation area 30, and the first slot 21 and the second slot 31 are coupled to each other; one end of the first slot 21 is located between the feeding point 32 and the grounding point 22, and extends to the second radiation area 20, and the second slot 31 is located next to the feeding point 32.

[0028] In this way, the 5G WiFi bandwidth is generated by coupling the first slot 21 and the second slot 31, that is, compared with Figure 2 Compared with the traditional terminal antenna shown in the figure, the terminal antenna of the utility model can not only simplify the antenna structure and reduce the components of the SAR value sensor for testing, but also improve the radiation performance of the antenna. In addition, the overall return loss of the antenna is reduced, and the passive efficiency meets the antenna performance requirements. The SAR value performance of the 5G WiFi generated by coupling is significantly higher than that of the 5G WiFi generated by the single routing. The size of the resultant is adjusted by adjusting the length and width of the gap.

[0029] Further, the first slot 21 is L-shaped, and one end of the first slot 21 extends from between the feeding point 32 and the grounding point 22 to the end of the first radiation area 10. The second slot 31 is L-shaped, and the second slot 31 is opened from the end of the third radiation area 30 and extends to the other end close to the third radiation area 30. The first radiation area 10, the second radiation area 20 and the third radiation area 30 are connected in sequence to form an IFA antenna. The first radiation area 10, the second radiation area 20 and the third radiation area 30 are all configured as IFA radiation antennas.

[0030] Furthermore, the first radiation area 10 is configured as a radiation branch of the GPS frequency band; the second radiation area 20 is configured as a radiation branch of the WiFi frequency band; the third radiation area 30 is configured as a radiation branch of the 2.4G WiFi frequency band and the BT frequency band. The first slot 21 and the second slot 31 are coupled to generate a bandwidth of the 5G WiFi frequency band.

[0031] Preferably, the width of the first slot 21 and the second slot 31 is in the range of 1.5 mm ± 0.1. The coupling spacing between the first slot 21 and the second slot 31 is in the range of 1 mm to 2 mm. With such a configuration, the terminal antenna of the utility model can produce the best effect. Figure 3 As shown, the width of the first slot 21 and the second slot 31 is 1.5 mm, and the coupling distance between the first slot 21 and the second slot 31 is 1.5 mm, which is a schematic diagram of the S11 parameters of the entire antenna of the utility model. Figure 4 The following is a schematic diagram of the S11 parameters of the traditional single routing. Figure 3 and Figure 4 It can be seen that the coupling line, i.e., the coupling line between the first slot 21 and the second slot 31, makes the echo depth and bandwidth of 5G WiFi better than S11 of the traditional antenna. In other words, the echo depth and bandwidth of the terminal antenna of the utility model are better than those of the traditional antenna. Figure 3 and Figure 4The passive efficiency of both groups can reach -5dB, and the antenna radiation emission parameters of the two routings can be 14dB. In comparison, although the mobile terminal of the utility model reduces the detection SAR sensor, the overall performance of the mobile terminal antenna of the utility model has not been weakened, that is, the passive efficiency can also reach -5dB, and the overall routing radiation emission parameters can reach 14dB, which is equivalent to the traditional routing performance. However, the SAR value of the zero-millimeter top surface 1g of the coupled routing 5G WiFi in the terminal antenna of the utility model is 1.45W / KG, so it can meet the performance requirements, while the traditional single routing 5G WiFi zero-millimeter top surface 1g SAR value is as high as 2.61W / KG. It can be seen from this that the terminal antenna of the utility model significantly reduces the SAR value of 5G WiFi.

[0032] In summary, the utility model provides a terminal antenna and a mobile terminal for reducing the SAR value, wherein the terminal antenna for reducing the SAR value comprises a feeding point 32, a grounding point 22, a first radiation area 10, a second radiation area 20 and a third radiation area 30; the third radiation area 30 is electrically connected to the feeding point 32, and the second radiation area 20 is electrically connected to the grounding point 22; a first slot 21 is provided on the second radiation area 20, and a second slot 31 is provided on the third radiation area 30, and the first slot 21 and the second slot 31 are coupled to each other; one end of the first slot 21 is located between the feeding point 32 and the grounding point 22, and extends toward the second radiation area 20, and the second slot 31 is located beside the feeding point 32. The terminal antenna for reducing the SAR value of the utility model can not only simplify the antenna structure and reduce the components for testing the SAR value sensor, but also improve the radiation performance of the antenna.

[0033] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. In addition, the different parts between the various embodiments can also be used in combination with each other, and the present utility model is not limited to this.

[0034] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A terminal antenna for reducing SAR value, characterized in that: The terminal antenna for reducing the SAR value includes a feeding point, a grounding point, a first radiation area, a second radiation area and a third radiation area; the third radiation area is electrically connected to the feeding point, and the second radiation area is electrically connected to the grounding point; A first slot is provided on the second radiation area, and a second slot is provided on the third radiation area, and the first slot and the second slot are coupled to each other; one end of the first slot is located between the feeding point and the grounding point and extends toward the second radiation area, and the second slot is located beside the feeding point.

2. The terminal antenna for reducing SAR value according to claim 1, characterized in that: The first slot is in an L shape, and one end of the first slot extends from between the feeding point and the grounding point to an end of the first radiation area.

3. The terminal antenna for reducing SAR value according to claim 2, characterized in that: The second slit is in an L shape, and the second slit is opened from an end of the third radiation area and extends to the other end close to the third radiation area.

4. The terminal antenna for reducing SAR value according to claim 3, characterized in that: The first radiation area, the second radiation area, and the third radiation area are sequentially connected to form an IFA antenna.

5. The terminal antenna for reducing SAR value according to claim 4, characterized in that: The first radiation area, the second radiation area and the third radiation area are all configured as IFA radiation antennas.

6. The terminal antenna for reducing SAR value according to claim 5, characterized in that: The first radiation area is configured as a radiation branch of the GPS frequency band; the second radiation area is configured as a radiation branch of the WiFi frequency band; and the third radiation area is configured as a radiation branch of the 2.4G WiFi frequency band and the BT frequency band.

7. The terminal antenna for reducing SAR value according to claim 6, characterized in that: The first slot and the second slot are coupled to generate a bandwidth of the 5G WiFi band.

8. The terminal antenna for reducing SAR value according to claim 7, characterized in that: The width of the first gap and the second gap is in the range of 1.5 mm±0.

1.

9. The terminal antenna for reducing SAR value according to claim 8, characterized in that: The coupling spacing between the first gap and the second gap is in the range of 1 mm to 2 mm.

10. A mobile terminal, characterized in that: The mobile terminal comprises the terminal antenna for reducing the SAR value as described in any one of claims 1-9.

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