CN211208677U - Antenna and electronic device - Google Patents
Antenna and electronic device Download PDFInfo
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- CN211208677U CN211208677U CN201921877063.XU CN201921877063U CN211208677U CN 211208677 U CN211208677 U CN 211208677U CN 201921877063 U CN201921877063 U CN 201921877063U CN 211208677 U CN211208677 U CN 211208677U
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Abstract
The present application relates to an antenna and an electronic device, wherein the antenna comprises an antenna body, a feed point and a ground point; the antenna body is respectively connected with the feed point and the grounding point; the antenna also comprises a resonance branch, and the resonance branch is connected with the feed point; the length of the resonance branch is one quarter wavelength, so that a central frequency point generated by the resonance branch is located in the central frequency point range of the antenna body and is used for dispersing the radiation hot spot of the antenna body. Through the parallel resonance branch at the feed point on the antenna, the radiation hot point of the antenna is dispersed, and the current density of the antenna can be reduced, so that the SAR of the antenna is effectively reduced, and the radiation efficiency of the antenna is not influenced.
Description
Technical Field
The present application relates to the field of antenna technologies, and in particular, to an antenna and an electronic device.
Background
With the development of wireless communication technology, miniaturized multiband built-in antennas have become the development direction of handheld communication terminal antennas. This type of antenna generates a high Specific Absorption Rate (SAR), which affects human health. SAR is an important index for measuring radiation of wireless terminal products with communication functions to human bodies. SAR refers to the electromagnetic power absorbed or consumed by a unit mass of human tissue, in W/kg, which represents the effect of radiation on the human body, the lower the SAR value, the less radiation is absorbed.
Conventionally, the SAR is reduced by arranging a wave-absorbing material on the antenna, however, the wave-absorbing material is lossy, so that the radiation efficiency of the antenna is reduced while the SAR is reduced, and the overall performance of the antenna is reduced.
SUMMERY OF THE UTILITY MODEL
The application provides an antenna and electronic equipment, can effectively reduce the SAR of antenna and can not influence the radiation efficiency of antenna.
An antenna comprising an antenna body, a feed point and a ground point; the antenna body is respectively connected with the feed point and the grounding point; the antenna also comprises a resonance branch, and the resonance branch is connected with the feed point; the length of the resonance branch is one quarter wavelength, so that a central frequency point generated by the resonance branch is located in the central frequency point range of the antenna body and is used for dispersing the radiation hot spot of the antenna body.
In one embodiment, the number of the resonant stubs is one.
In an embodiment, the resonant stub is linear and perpendicular to the antenna body.
In an embodiment, the resonant branch is linear and forms an included angle with the antenna body.
In one embodiment, the resonant stub is of a bent type.
In one embodiment, the resonant stub includes a first bent portion and a second bent portion, and the first bent portion and the second bent portion are perpendicular.
In an embodiment, the number of the resonant branches is multiple, the multiple resonant branches are all connected with the feeding point, and the multiple resonant branches are arranged at an angle.
In one embodiment, the angle between any two of the resonant stubs is the same.
In one embodiment, the resonant branches are made of metal.
An electronic device comprises the antenna.
The antenna and the electronic equipment provided by the embodiment of the application, wherein the antenna comprises an antenna body, a feeding point and a grounding point; the antenna body is respectively connected with the feed point and the grounding point; the antenna also comprises a resonance branch, and the resonance branch is connected with the feed point; the length of the resonance branch is one quarter wavelength, so that a central frequency point generated by the resonance branch is located in the central frequency point range of the antenna body and is used for dispersing the radiation hot spot of the antenna body. Through the parallel resonance branch at the feed point on the antenna, the radiation hot point of the antenna is dispersed, and the current density of the antenna can be reduced, so that the SAR of the antenna is effectively reduced, and the radiation efficiency of the antenna is not influenced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a conventional antenna according to an embodiment;
fig. 2 is a diagram of an antenna according to an embodiment;
fig. 3 is a second structural diagram of an antenna according to an embodiment;
fig. 4 is a third structural diagram of an antenna according to an embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and in the accompanying drawings, preferred embodiments of the present application are set forth. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present application, "a number" means at least one, such as one, two, etc., unless specifically limited otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Fig. 1 is a schematic structural diagram of a conventional antenna, and fig. 2 is a schematic structural diagram of an antenna provided in the present application, where as shown in fig. 1, the antenna includes an antenna body 110, a feeding point 120, and a grounding point 130; the antenna body 110 is connected to the feeding point 120 and the grounding point 130, respectively; the antenna further comprises a resonant stub, which is connected to the feeding point 120; the length of the resonant branch is a quarter wavelength, so that a central frequency point generated by the resonant branch 140 is located in the range of the central frequency point of the antenna body 110, and is used for dispersing the radiation hot spot of the antenna body 110.
The antenna body 110 includes a feeding portion connected to the feeding point 120 and a grounding portion connected to the grounding point 130 for radiating a radio frequency signal. The antenna provided by the embodiment of the application can be applied to electronic equipment, and the electronic equipment comprises the antenna, a substrate and a radio frequency transceiving circuit arranged on the substrate; the radio frequency transceiving circuit is connected with the antenna and used for processing the radio frequency signals transmitted and received by the antenna. The electronic device further includes a housing within which the antenna may be housed. The casing is including relative first side, the third side that sets up to and relative second side and the fourth side that sets up, the second side is connected first side the one end of third side, the fourth side is connected first side the other end of third side. The antenna body 110 may be disposed on at least one of the first side, the second side, the third side, and the fourth side. The feeding portion and the grounding portion of the antenna body 110 may be disposed at a side close to the case, so that radiation to a human body may be reduced.
The feeding point 120 is generally understood as a connection position of the cable line and the antenna, and is referred to as a connection point, i.e. the feeding point 120. The grounding point 130 is used to optimize the efficiency of the antenna and to improve the signal transmission, antenna radiation and reception, and the grounding point 130 is the "foundation" of the antenna.
The specific radiation process of the radio frequency signal is as follows: the feeding network transmits the rf signal to the feeding point 120, and feeds the rf signal to the antenna body 110 through the feeding point 120, and the energy coupled to the antenna body 110 excites the resonance of the current, thereby radiating the rf signal to the space. Therefore, when the antenna radiates a signal, the SAR hot spot is mainly concentrated near the feeding point 120 of the antenna, and the resonant branch 140 is connected with the feeding point 120, so that the radiation hot spot of the antenna body 110 can be more effectively dispersed.
The center frequency point generated by the resonant branch 140 is located within the range of the center frequency point of the antenna body 110, so that the function of dispersing the radiation hot spot of the antenna body 110 can be realized.
The wavelength of the center operating frequency of the resonant stub 140 determines the length of the resonant stub 140. Specifically, the relationship between the wavelength and the frequency is an inverse relationship, and the specific calculation formula is: wavelength (unit: m) 300/frequency (unit: MHz). When the central frequency point is 150MHz, the wavelength is 2 m, so the signal about 150MHz is called 2 m wave, and the wavelength of 430MHz is 0.7 m, so the signal about 430MHz is called 70 cm wave. The length of the resonant stub 140 is proportional to the wavelength, and therefore inversely proportional to the frequency, the higher the frequency, the shorter the wavelength, and the shorter the resonant stub 140 can do.
In this embodiment, the length of the resonant stub 140 is set to be a quarter wavelength, which can be understood as a corresponding wavelength of the frequency band where the antenna body 110 is located, so that the central frequency point generated by the resonant stub 140 is located within the range of the central frequency point of the antenna body 110, thereby dispersing the radiation hot spot of the antenna body 110, reducing the current density of the antenna, and effectively reducing the SAR of the antenna. In addition, the length of the resonant stub 140 is set to be a quarter wavelength, so that the radiation and reception effects of the antenna can be optimized.
As shown in fig. 1, the antenna is an IFA antenna with low frequency + intermediate frequency, and at the intermediate frequency of 2GHz, the SAR hot spot is very concentrated, mainly near the feeding point 120 of the IFA antenna. If the human body approaches the antenna, strong radiation is generated to the human body. As shown in fig. 2, after the resonant stub 140 is connected in parallel to the feeding point 120 of the antenna body 110, the SAR hot spot is not concentrated near the feeding point 120, but dispersed around the resonant stub 140, so that the current density of the antenna is greatly reduced, and the SAR is effectively reduced.
The antenna provided by the embodiment of the present application includes an antenna body 110, a feeding point 120, and a grounding point 130; the antenna body 110 is connected to the feeding point 120 and the grounding point 130, respectively; the antenna further comprises a resonance branch 140, the resonance branch 140 is connected with the feed point 120, and a central frequency point generated by the resonance branch 140 is located in the range of the central frequency point of the antenna body 110 and used for dispersing the radiation hot spot of the antenna body 110. By connecting the resonant branches 140 in parallel at the feed point 120 of the antenna, the radiation hot spot of the antenna is dispersed, and the current density of the antenna can be reduced, so that the SAR of the antenna is effectively reduced, and the radiation efficiency of the antenna is not affected.
In an embodiment, the resonant branch 140 is made of a metal material, and the metal material is a low-loss material, so that the influence of the resonant branch 140 on the radiation efficiency of the antenna can be reduced.
In one embodiment, as shown in fig. 2, the number of the resonant branches 140 is one, and the resonant branches 140 are linear and perpendicular to the antenna body 110. The resonant branches 140 are arranged perpendicular to the antenna body 110, so that a good dispersion effect can be achieved by fewer resonant branches 140. It can be understood that the resonant branch 140 may form an included angle with the antenna body 110, as shown in fig. 3, the resonant branch 140 and the antenna body 110 form an included angle, and although the hot spot dispersion area is changed relative to the vertical arrangement, the SAR hot spots may be dispersed, the current density is reduced, and the effect of reducing SAR is achieved.
In one embodiment, the resonant stubs 140 are arranged in a bent type. In one embodiment, as shown in fig. 4, the resonant stub includes a first bending portion 141 and a second bending portion 142, and the first bending portion 141 and the second bending portion 142 are perpendicular. The antenna is disposed on a first side of the housing of the electronic device, wherein the antenna body 110 is disposed in parallel along the first side, and the feeding point 120 and the grounding point 130 of the antenna are disposed on a side close to the housing. The first bending portion 141 of the resonant branch 140 is disposed at the first side and is parallel to the antenna body 110, the second bending portion 142 of the resonant branch 140 is disposed at the second side, and the first bending portion 141 is perpendicular to the second bending portion 142. As can be seen from fig. 4, the radiation hot spot of the antenna is dispersed along the first bending portion 141 and the second bending portion 142, so that the radiation hot spot of the antenna can be dispersed in multiple directions, thereby more effectively reducing the current density and achieving the effect of reducing the SAR. When a user uses the electronic equipment, the user cannot be radiated by the antenna in multiple directions of the electronic equipment.
It is understood that the second bending part 142 may also be disposed at a fourth side adjacent to the first side. The present embodiment is described only by taking the antenna disposed at the first side as an example. Of course, the antenna may also be arranged at other sides of the housing, such as the third side. If the antenna is disposed on the third side, the antenna body 110 is disposed in parallel along the third side, and the feeding point 120 and the grounding point 130 of the antenna are disposed on a side close to the housing. The first bending portion 141 of the resonant stub 140 is disposed at the third side and is parallel to the antenna body 110, the second bending portion 142 of the resonant stub 140 is disposed at the second side or the fourth side, and the first bending portion 141 is perpendicular to the second bending portion 142.
In an embodiment, the number of the resonant branches 140 is multiple, the resonant branches 140 are all connected to the feeding point 120, and the resonant branches 140 are disposed at an angle. The plurality of resonance branches 140 are arranged at an angle, so that the radiation hot spot dispersion area is enlarged, the current density is effectively reduced, and the SAR is reduced. In one embodiment, the angles between any two of the resonant stubs 140 are the same, so that the radiation hot spots can be dispersed more uniformly.
As shown in fig. 4, the number of the resonant branches 140 is two, and both of the resonant branches 140 are connected to the feeding point 120. Two resonance branches 140 are the angle setting for the radiation hot spot is dispersed towards different directions along two resonance branches 140, thereby can reduce the density of current more effectively, realizes reducing SAR's effect. When a user uses the electronic equipment, the user cannot be radiated by the antenna in multiple directions of the electronic equipment.
The application also provides an electronic device, which comprises a substrate, a radio frequency transceiver circuit arranged on the substrate, and the antenna; the radio frequency transceiving circuit is connected with the antenna and used for processing the radio frequency signals transmitted and received by the antenna. The electronic device according to the embodiment of the application may be a communication module including a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Mobile Internet Device (MID), a wearable device (e.g., a smart watch, a smart bracelet, a pedometer, etc.), or other antenna array that can be set.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An antenna comprising an antenna body, a feed point and a ground point; the antenna body is respectively connected with the feed point and the grounding point; the antenna is characterized by further comprising a resonance branch, wherein the resonance branch is connected with the feed point; the length of the resonance branch is one quarter wavelength, so that a central frequency point generated by the resonance branch is located in the central frequency point range of the antenna body and is used for dispersing the radiation hot spot of the antenna body.
2. The antenna of claim 1, wherein the number of resonant stubs is one.
3. The antenna of claim 2, wherein the resonant stub is linear and disposed perpendicular to the antenna body.
4. The antenna of claim 2, wherein the resonant stub is linear and disposed at an angle to the antenna body.
5. The antenna of claim 1, wherein the resonating stub is bent.
6. The antenna of claim 5, wherein the resonating stub includes a first bend and a second bend, the first bend and the second bend being perpendicular.
7. The antenna of claim 1, wherein the number of the resonant stubs is plural, the plural resonant stubs are all connected to the feeding point, and the plural resonant stubs are disposed at an angle.
8. The antenna of claim 7, wherein the angle between any two of the resonant stubs is the same.
9. The antenna of claim 1, wherein the resonant stub is made of a metal.
10. An electronic device, characterized in that the electronic device comprises an antenna according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921877063.XU CN211208677U (en) | 2019-11-04 | 2019-11-04 | Antenna and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921877063.XU CN211208677U (en) | 2019-11-04 | 2019-11-04 | Antenna and electronic device |
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| CN211208677U true CN211208677U (en) | 2020-08-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952724A (en) * | 2020-09-28 | 2020-11-17 | 西安电子科技大学 | Antenna module and electronic equipment |
| CN111969305A (en) * | 2020-09-28 | 2020-11-20 | 西安电子科技大学 | Antenna module and communication equipment |
| WO2023103735A1 (en) * | 2021-12-07 | 2023-06-15 | Oppo广东移动通信有限公司 | Antenna apparatus and electronic device |
-
2019
- 2019-11-04 CN CN201921877063.XU patent/CN211208677U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952724A (en) * | 2020-09-28 | 2020-11-17 | 西安电子科技大学 | Antenna module and electronic equipment |
| CN111969305A (en) * | 2020-09-28 | 2020-11-20 | 西安电子科技大学 | Antenna module and communication equipment |
| CN111952724B (en) * | 2020-09-28 | 2022-11-08 | 西安电子科技大学 | Antenna module and electronic equipment |
| CN111969305B (en) * | 2020-09-28 | 2022-12-09 | 西安电子科技大学 | Antenna module and communication equipment |
| WO2023103735A1 (en) * | 2021-12-07 | 2023-06-15 | Oppo广东移动通信有限公司 | Antenna apparatus and electronic device |
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