WO2023103735A1

WO2023103735A1 - Antenna apparatus and electronic device

Info

Publication number: WO2023103735A1
Application number: PCT/CN2022/132621
Authority: WO
Inventors: 周林
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-12-07
Filing date: 2022-11-17
Publication date: 2023-06-15
Also published as: CN116247420A

Abstract

The present application relates to an antenna apparatus and an electronic device. The antenna apparatus comprises a first radiator and a second radiator. The first radiator comprises a free end, a first connection end, and a feed point and a first grounding point, which are arranged between the free end and the first connection end, wherein the feed point is used to be connected to a feed source. The second radiator comprises a second connection end and a second grounding point, wherein the second connection end is electrically connected to the first connection end. The first radiator is used for supporting a first frequency band and a second frequency band, wherein the first frequency band is different from the second frequency band; and the second radiator is used for supporting a third frequency band, wherein a central frequency point of the first frequency band is within a frequency band range of the third frequency band. In this way, a first radiator and a second radiator are used to jointly radiate signals in at least some frequency bands, such that a current is shunted by the first radiator and the second radiator, and thus the current concentration condition of an antenna apparatus can be balanced to a certain extent, thereby making an SAR value of the antenna apparatus relatively low.

Description

Antenna devices and electronic equipment

Cross References to Related Applications

This application claims priority to Chinese application No. 202111486240.3 filed on December 07, 2021, which is hereby incorporated by reference in its entirety for all purposes.

technical field

The present application relates to the technical field of mobile communications, and more specifically, to an antenna device and electronic equipment.

Background technique

With the development and progress of science and technology, communication technology has developed rapidly and made great progress. With the improvement of communication technology, the popularity of smart electronic products has reached an unprecedented height. More and more smart terminals or electronic devices have become people's An integral part of life, such as smartphones, smart bracelets, smart watches, smart TVs and computers, etc. At present, a communication antenna is usually installed in an electronic device to meet a communication requirement of a user. As people's demand for communication efficiency and types is getting higher and higher, the power of antennas in electronic devices is also increasing, resulting in greater radiation effects from antennas on the human body, which will have adverse effects on the human body.

Contents of the invention

Embodiments of the present application provide an antenna device and electronic equipment.

According to a first aspect of the present application, an embodiment of the present application provides an antenna device, which includes a first radiator and a second radiator. The first radiator includes a free end, a first connection end, a feeding point and a first grounding point arranged between the free end and the first connection end, and the feeding point is used for connecting a feed source. The second radiator includes a second connection end and a second ground point, and the second connection end is electrically connected to the first connection end. The first radiator is used to support the first frequency band and the second frequency band, and the first frequency band and the second frequency band are different; the second radiator is used to support the third frequency band, and the center frequency point of the first frequency band is within the frequency range of the third frequency band Inside.

According to a second aspect of the present application, an embodiment of the present application provides an electronic device, which includes a housing and the above-mentioned antenna device, and a first radiator and a second radiator are integrated into the housing.

According to a third aspect of the present application, an embodiment of the present application provides an electronic device, which includes a frame and the above-mentioned antenna device, where the material of the frame includes metal, and the antenna device is integrated into the frame.

Description of drawings

In order to illustrate the technical solution of the present application more clearly, the accompanying drawings used in the implementation will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the application. As far as the skilled person is concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

Fig. 1 is a schematic diagram of a structure of an antenna device provided by an embodiment of the present application.

FIG. 2 is a schematic diagram of another structure of the antenna device of the embodiment in FIG. 1 .

FIG. 3 is a schematic diagram of another structure of the antenna device of the embodiment in FIG. 1 .

Fig. 4 is a schematic diagram of a structure of an antenna device provided by another embodiment of the present application.

FIG. 5 is a schematic diagram of another structure of the antenna device of the embodiment in FIG. 4 .

6 and 7 are schematic diagrams of another structure of the antenna device of the embodiment shown in FIG. 4 .

FIG. 8 is a schematic diagram of another structure of the antenna device of the embodiment in FIG. 4 .

FIG. 9 is a schematic structural diagram of the first radiator, the feeding circuit and the frequency band selection circuit of the antenna device shown in FIG. 8 .

FIG. 10 is another structural schematic diagram of the frequency band selection circuit shown in FIG. 9 .

Fig. 11 is a schematic structural diagram of an application example of the antenna device provided by the embodiment of the present application.

12-13 are S-parameter diagrams of the antenna device shown in FIG. 11 .

14-15 are simulation diagrams of the electric field distribution of the antenna device shown in FIG. 11 .

16-17 are schematic diagrams of the radiation efficiency of the antenna device shown in FIG. 11 .

Fig. 18 is a schematic diagram of the structure of an antenna device provided by another embodiment of the present application.

Fig. 19 is a schematic diagram of an electronic device provided by an embodiment of the present application.

FIG. 20 is a schematic diagram of the internal structure of the electronic device shown in FIG. 19 .

FIG. 21 is a schematic structural diagram of an antenna device provided by an embodiment of the present application applied to an electronic device.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

If certain terms are used to refer to specific components in the description and claims, those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The description and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to"; "approximately" means that those skilled in the art can solve the problem within a certain error range Technical problems, basically achieve technical results.

"Electronic equipment" as used in the embodiments of this application includes, but is not limited to, configured to be connected via a wire line (such as via a public switched telephone network (PSTN), digital subscriber line (DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (for example, for a cellular network, a wireless local area network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or A device for receiving/transmitting communication signals through a wireless interface of another communication terminal. A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", "electronic device" and/or "electronic equipment". Examples of electronic devices include, but are not limited to, satellite or cellular telephones; Personal Communication Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data communication capabilities; may include radiotelephones, pagers, Internet/Intranet access , a PDA with a web browser, organizer, calendar, and/or Global Positioning System (GPS) receiver; and a conventional laptop and/or palm-sized receiver, game console, or other electronic device including a radiotelephone transceiver.

Electromagnetic wave energy absorption ratio (SAR, Specific Absorption Rate) is usually called absorption ratio or absorption ratio, which refers to the electromagnetic wave energy absorption ratio of electronic equipment. The specific meaning is: under the action of an external electromagnetic field, an induced electromagnetic field will be generated in the human body. Since each organ of the human body is a lossy medium, the electromagnetic field in the body will generate an induced current, causing the human body to absorb and dissipate electromagnetic energy. In biological dosimetry SAR is commonly used to characterize this physical process. The meaning of SAR is the electromagnetic power absorbed or consumed by human tissue per unit mass, and the unit is W/kg, or mw/g. The expression formula is: SAR＝σ|Ei|2/2ρ, where:

Ei is the effective value of the electric field intensity in the cell tissue, expressed in V/m;

σ is the electrical conductivity of human tissue, expressed in S/m;

ρ is the density of human tissue, expressed in kg/m3.

SAR in human tissue is proportional to the square of the electric field strength in that tissue and is determined by the parameters of the incident electromagnetic field (such as frequency, strength, direction, and source of the electromagnetic field), the relative position of the target, and the typical tissue of the exposed human body. genetic characteristics, ground effects, and environmental effects of exposure. At present, many countries and regions have established safety standards for human exposure to electromagnetic waves. For example, among the internationally accepted standards, the European standard is less than 2.0w/kg per 10 grams, and the American standard is less than 1.6mw/g per gram.

At present, the commonly used methods to reduce the SAR value are as follows: (1) directly reduce the transmission power of the antenna to reduce the absorption of electromagnetic waves by the human body, but it is difficult to ensure the total radiated power (TRP) by reducing the transmission power of the antenna requirements, the TRP is too low, and the communication quality is also low, which usually cannot meet the increasing communication requirements in the market; (2) reduce the transmission power of the antenna in different scenarios, and use the human tissue detection device (SAR SENSOR), only when the human body is close to the electronic It is also difficult to ensure the total radiation power requirements when reducing the transmission power of the equipment; (3) The transmission power of the antenna is transmitted through multiple antennas by using a power divider, but the current development trend of electronic equipment is that the thickness is getting thinner and thinner, resulting in antennas The space is getting smaller and smaller, and it is difficult to provide space for additional antennas; (4) Add grounding branches under the antenna floor to make the current distribution on the antenna more uniform, but this solution is only for FPC antennas, not suitable for metal frames Electronic equipment has great limitations. It can be seen that up to now, there is still no better solution that can effectively reduce the SAR of the antenna.

Therefore, in view of the above problems, the inventors of the present application have found after a large number of repeated studies that the SAR hotspots of the antennas of current electronic equipment are basically concentrated in the area where the current distribution on the radiator is strong, that is, the current density on the radiator The larger the area, the larger the corresponding SAR value. In view of this, the inventor proposes the antenna device of the present application and electronic equipment including the antenna device. The radiator of the antenna device includes a first radiator and a second radiator, and the first radiator includes a free end, a first connection end, a feed point and a first ground point arranged between the free end and the first connection end , the feed point is used to connect the feed source; the second radiator includes a second connection end and a second ground point, and the second connection end is electrically connected to the first connection end. The first radiator is used to support the first frequency band and the second frequency band, and the first frequency band and the second frequency band are different; the second radiator is used to support the third frequency band, and the center frequency point of the first frequency band is within the frequency range of the third frequency band Inside. Therefore, by setting the first radiator to be able to support the first frequency band, and the center frequency point of the first frequency band is within the frequency range of the third frequency band, when the second radiator radiates the signal of the third frequency band, the first radiation The body can generate resonance about the third frequency band, and the two can jointly radiate at least part of the signal of the frequency band (that is, the signal of the third frequency band), so that the current corresponding to the third frequency band on the second radiator is shunted by the first radiator, The current distribution of the second radiator can be improved, so that the current concentration of the antenna device can be balanced to a certain extent, thereby effectively reducing the overall SAR value of the antenna device. Therefore, the antenna device provided by the embodiment of the present application has a lower SAR value.

The antenna device and electronic equipment proposed in the present application will be further described below in conjunction with specific implementation methods and schematic drawings.

Referring to FIG. 1 , an embodiment of the present application provides an antenna device 100 , which includes a radiator 10 and a feeding circuit 30 connected to the radiator 10 . The radiator 10 is used to receive and transmit radio frequency signals, and the feeding circuit 30 is used to feed excitation current to the radiator 10 so that the radiator 10 can resonate to radiate radio frequency signals. The feed circuit 30 is suitable for being connected to and controlled by the main board of the electronic device.

The radiator 10 includes a first radiator 12 and a second radiator 14 , and the first radiator 12 and the second radiator 14 are electrically connected to each other. In the embodiment of the present application, the electrical connection relationship between the first radiator 12 and the second radiator 14 may be realized through direct connection of physical structures, or may be realized through electrical coupling or magnetic coupling structures. For example, in the embodiment shown in FIG. 1 , the first radiator 12 and the second radiator 14 are directly connected through a physical structure, so as to realize the electrical connection relationship between the two. It should be understood that although the structures of the first radiator 12 and the second radiator 14 are shown in different figures in FIG. The limitation of the structure of the radiator 10, for example, in this embodiment, the radiator 10 including the first radiator 12 and the second radiator 14 can be an integrated antenna radiator, the first radiator 12 and the second radiator The materials of the body 14 may be the same, or there may be no clear dividing line between the two, and even in other embodiments, the structures of the first radiator 12 and the second radiator 14 may also have a relatively obvious dividing line. boundaries. Further, in the embodiment of the present application, the first radiator 12 may be any one of a flexible circuit board radiator, a laser direct forming radiator, a printing direct forming radiator, or a metal radiator. The second radiator 14 can also be any one of a flexible circuit board radiator, a laser direct forming radiator, a printing direct forming radiator or a metal branch, and the material or shape of the first radiator 12 and the second radiator 14 The methods may be the same or different, and this application does not limit this.

In the embodiment of the present application, the first radiator 12 includes a free end 122 , a first connection end 123 , a feed point 127 and a first ground point 128 . The free end 122 and the first connecting end 123 are located at opposite ends of the first radiator 12 , and the feeding point 127 and the first grounding point 128 are disposed between the free end 122 and the first connecting end 123 .

The feed point 127 is used to connect the feed source in the feed circuit 30 . The feed point 127 is disposed on the first radiator 12 relatively close to the second radiator 14 , so that the distance between the feed point 127 and the free end 122 is greater than the distance between the feed point 127 and the first connection end 123 .

Further, the first ground point 128 is grounded through the inductor L0. The position of the first ground point 128 on the first radiator 12 is adjacent to the feeding point 127, so that the first radiator 12 roughly forms an IFA (Inverted-F Antenna, IFA) antenna structure, and the impedance of the first radiator 12 can be made The matching is better, and the volume is small, the structure is simple, and the preparation cost is lower. The first ground point 128 is also arranged on the first radiator 12 at a position relatively close to the second radiator 14, so that the distance between the first ground point 128 and the free end 122 is greater than the distance between the first ground point 128 and the first connection end 123. distance.

In some embodiments, as in the embodiment shown in FIG. 1 , the first grounding point 128 and the feeding point 127 can be arranged on the first radiator 12 at intervals, but the distance between the two is limited within a specified distance. , for example, the distance between the first ground point 128 and the feeding point 127 should be less than or equal to 5mm, so as to ensure that the inductance of the first radiator 12 introduced by the first ground point 128 is small, so that the first radiator 12 The impedance matching performance is better. Further, the first ground point 128 may be located between the feed point 127 and the free end 122 , or the first ground point 128 may be located between the feed point 127 and the first connection end 123 .

In other embodiments, the potential of the first ground point 128 may be the same as that of the feed point 127. As shown in FIG. 2, the first ground point 128 may be the same point as the feed point 127, so that The inductance introduced by the location 128 is small, which makes the impedance matching performance of the first radiator 12 better. In this embodiment, the inductor L0 can be connected in parallel with the feed circuit 30 . The specific grounding form of the first grounding point 128 can be realized by a structure such as a grounding shrapnel, and the specific structure of the feeding point 127 can also be realized by a structure such as a feeding shrapnel, which is not limited in this application.

The second radiator 14 includes a second connection end 141 and a second ground point 147, the second connection end 141 is located at the part of the second radiator 14 close to the first radiator 12, and the second connection end 141 is connected to the first Terminal 123 is electrically connected. In the embodiment of the present application, the electrical connection relationship between the second connection end 141 and the first connection end 123 can be realized through direct connection of physical structures, or through electric coupling or magnetic coupling structures, as shown in FIG. 2 In the illustrated embodiment, the second connection end 141 is directly connected to the first connection end 123 so that the second connection end 141 is electrically connected to the feed source of the feed circuit 30 via the first connection end 123 and the feed point 127 . It should be understood that a certain element referred to in the embodiment of the present application includes an "end" part, which can be understood as a part occupying a certain physical space, and the "end" part is located at the end area of the corresponding element, for example, The "end" portion may be a part of the extended end of the element. If the "end" portion has a certain extension size, the extension size may not be greater than one-half of the overall extension size of the element; for another example, the The "end" part can also be the end surface or end line of the extended end of the element.

In the embodiment of the present application, the first radiator 12 may be used to send or/and receive at least one signal of an operating frequency band, and the signal may be, for example, a Long Term Evolution (LTE) signal. The working frequency band of the signal radiated by the first radiator 12 can include at least one frequency band of LTE, such as B1 frequency band (1.92GHz-2.17GHz), B3 frequency band (1.71GHz-1.88GHz), B2 frequency band (1.85GHz-1.99GHz) , B5 frequency band (0.824GHz-0.894GHz), B8 frequency band (0.88GHz-0.96GHz), B28 frequency band (0.703GHz-0.803GHz), B40 frequency band (2.30GHz-2.40GHz), B41 frequency band (2.496GHz-2.690GHz) etc. The signal radiated by the first radiator 12 can also be a new air interface (New Radio, NR) signal, etc., and its working frequency band can also include at least one frequency band of NR, such as N1 frequency band (1.92GHz-2.17GHz), N2 frequency band (1.85 GHz-1.99GHz) and so on. In the embodiment of the present application, the frequency band supported by the first radiator 12 may cover at least one of the above-mentioned working frequency bands. For example, the frequency range supported by the first radiator 12 can cover the frequency ranges of multiple operating frequency bands, such as covering the frequency ranges of B1, B3/N3 frequency bands and B5/N5 frequency bands, then the first radiator 12 can send or/and Receive signals in B1, B3/N3 frequency band or B5/N5 frequency band.

The second radiator 14 can be used to send and/or receive signals of at least one working frequency band, and its working frequency band can include at least one frequency band of LTE, such as the above-mentioned B1 frequency band, B2 frequency band, B3 frequency band and so on.

Further, in the embodiment of the present application, the first radiator 12 is used to support the first frequency band and the second frequency band, and the first frequency band and the second frequency band are different. The second radiator 14 is used to support the third frequency band, and the center frequency point of the first frequency band is within the frequency range of the third frequency band, so that when the second radiator 14 radiates the signal of the third frequency band, the first radiator 12 can generate Regarding the resonance of the third frequency band, the two can jointly radiate signals of at least part of the frequency band (that is, signals of the third frequency band), so that the current corresponding to the third frequency band on the second radiator 14 is shunted by the first radiator 12, which can Improving the current distribution of the second radiator 14 can balance the current concentration of the antenna device 100 to a certain extent, thereby effectively reducing the overall SAR value of the antenna device 100 . It should be understood that, in the embodiment of the present application, the two frequency bands are "different" means that the frequency ranges of the two frequency bands are not completely the same, for example, the frequency ranges of the two frequency bands may be completely different (such as the two frequency bands have different intersection), as another example, the frequency ranges of two frequency bands may also partially overlap (for example, there is an intersection between the two, and at least part of the frequency of one frequency band is within the range of another frequency band).

Further, in the embodiment of the present application, the second frequency band is lower than the first frequency band and lower than the third frequency band. It should be understood that "the second frequency band is lower than the first frequency band and lower than the third frequency band" means that the frequency range of the second frequency band is lower than the frequency range of the first frequency band and lower than the frequency range of the third frequency band, It may have the following specific circumstances: for example, the highest frequency of the second frequency band is lower than the lowest frequency of the first frequency band, and lower than the lowest frequency of the third frequency band; for another example, the highest frequency of the second frequency band is lower than the lowest frequency of the first frequency band frequency, or lower than the lowest frequency in the third band. In some embodiments, the second frequency band may be a low frequency band, for example, the second frequency band may include at least one of the aforementioned frequency bands B5, B8, and B28. The third frequency band may be approximately the same as the first frequency band, that is, the first radiator 12 and the second radiator 14 may be used to transmit or/and receive signals in approximately the same operating frequency band. The first radiator 12 and the second radiator 14 are shunted, so as to reduce the current peak value on the second radiator 14 and optimize its electric field distribution, thereby reducing the SAR value of the antenna device 100 . It should be understood that, at this time, the number of working frequency bands of signals supported by the first radiator 12 and the second radiator 14 may be one or more. For example, the third frequency band is the same as the first frequency band, both of which can be 1.7GHz to 2.2GHz, and the frequency range of this frequency band covers the frequency range of B1 and B3 frequency bands, so the first radiator 12 and the second radiator 14 can both support the work The frequency bands are signals in the B1 and B3 frequency bands.

Further, the first frequency band and the third frequency band may be intermediate frequency bands, but their ranges may not be completely the same. For example, the first frequency band and the third frequency band may include at least one of the above-mentioned B1, B2, and B3 frequency bands, or the center frequency of the first frequency band and the center frequency of the third frequency band are both in the frequency range of 1.7-2.2 GHz Inside. Therefore, the first radiator 12 is used to support the mid-frequency band and the low-frequency band, and the second radiator 14 is used to support the mid-frequency band. When the first radiator 12 supports the first frequency band, the central frequency point of the first frequency band may be within the frequency range of the third frequency band, for example, the central frequency point of the first frequency band may be within the range of the intermediate frequency band.

It should be understood that the third frequency band mentioned in this application should not be strictly limited to the intermediate frequency band, for example, the third frequency band may cover the intermediate frequency band, or the center frequency point of the third frequency band is within the intermediate frequency band, or The third frequency band and the intermediate frequency band have overlapping frequency band ranges, which means that the upper limit value of the frequency band range of the third frequency band can be slightly offset with respect to the upper limit value of the intermediate frequency band (such as the frequency band range of the third frequency band The upper limit value of the frequency band can be slightly greater than or slightly smaller than the upper limit value of the intermediate frequency band), the lower limit value of the frequency range of the third frequency band can be slightly offset relative to the lower limit value of the intermediate frequency band (such as the frequency band of the third frequency band The lower limit value of the range can be slightly greater than or slightly smaller than the lower limit value of the intermediate frequency band), then the center frequency point of the first frequency band is within the frequency range of the third frequency band, and the following situations can exist: the center of the first frequency band The frequency point is in the intermediate frequency band; or the center frequency point of the first frequency band is in the third frequency band but not in the intermediate frequency band. In these cases, when the second radiator 14 is radiating the signal of the third frequency band, the first radiator 12 can generate resonance about the first frequency band, and the two can jointly radiate at least part of the signal of the frequency band (that is, the signal of the third frequency band signal), the first radiator 12 can also shunt the current of the second radiator 14 .

In some implementation manners, the third frequency band may be a sub-frequency band of the first frequency band, that is, the first frequency band covers the third frequency band. At this time, the number of working frequency bands of signals that can be supported by the first radiator 12 is more than that of the working frequency bands of signals that can be supported by the second radiator 14 . The number of working frequency bands of signals supported by the second radiator 14 is one or more, and the working frequency bands of signals supported by the first radiator 12 include the working frequency bands of signals supported by the second radiator 14 . For example, the third frequency band is 1.8GHz˜1.85GHz, and the range of this frequency band covers the frequency range of the B1 frequency band. The first frequency band is from 1.7GHz to 2GHz, and the frequency range covers the frequency ranges of the B1 and B3 frequency bands, and also covers the frequency range of the third frequency band.

Further, in order to support the above-mentioned first frequency band and second frequency band, the first radiator 12 is configured to work in the corresponding resonant mode, such as the first radiator 12 can work in the first resonant mode and be different from the first resonant mode The second resonance mode, wherein the first resonance mode indicates that the first radiator 12 produces resonance in the first frequency band, and the second resonance mode indicates that the first radiator 12 produces resonance in the second frequency band. Specifically, a specified current path is formed on the first radiator 12 from the feeding point 127 to the free end 122, and the high-order mode of the specified current path is used to form the first resonance mode to radiate the signal of the first frequency band, thereby dispersing the second The current distribution on the radiator corresponding to the third frequency band. The fundamental mode of the designated current path is used to form a second resonance mode to radiate a signal of the second frequency band. For example, the first radiator 12 has an appropriate equivalent electrical length, so that the specified current path can form the resonance of the 1/2 wavelength mode of the first frequency band, or form the resonance of the 3/4 wavelength mode of the first frequency band, or form the resonance of the first frequency band The resonance of the 5/8 wavelength mode of a frequency band, or the resonance of the 5/4 wavelength mode forming the first frequency band (that is, the first resonance mode), where the first frequency band can be an intermediate frequency band or a high frequency band; at the same time The equivalent electrical length of the first radiator 12 also enables the specified current path to form a resonance of a 1/4 wavelength mode of the second frequency band (that is, the second resonance mode), wherein the second frequency band may be a low frequency band.

In some embodiments, the first radiator 12 can also be used to support high-frequency frequency bands, such as the above-mentioned B40 and B41 frequency bands. For example, the first radiator 12 has an appropriate equivalent electrical length, so that the specified current path can form the high frequency band. The resonance of the 3/4 wavelength mode of the frequency band. Further, the equivalent electrical length of the second radiator 14 is smaller than the equivalent electrical length of the first radiator 12, and the second radiator 14 can generate the resonance of the 1/4 wavelength mode of the third frequency band, wherein the third frequency band can If it is an intermediate frequency band, when the first radiator 12 produces the resonance of the high-order mode of the first frequency band, and the second radiator 14 produces the resonance of the fundamental mode of the third frequency band, the two can radiate at least part of the frequency band at the same time. (such as the signal of the third frequency band), so that the current corresponding to the third frequency band on the second radiator 14 is shunted by the first radiator 12 , which can improve the current distribution of the second radiator 14 .

In the embodiment of the present application, the first radiator 12 can be arranged at an appropriate equivalent electrical length so that the first radiator 12 can work in the above-mentioned first resonant mode without requiring additional impedance elements.

For example, the physical physical length of the first radiator 12 may be designed within an appropriate range to configure the equivalent electrical length of the first radiator 12 . Specifically, the physical length of the first radiator 12 may be equal to one-half, three-quarters, or four-fifths of the wavelength of the first frequency band, so that the first resonance mode is the corresponding 1/2 wavelength mode, 3/4 wavelength mode or 3/4 wavelength mode.

As another example, the equivalent electrical length of the first radiator 12 may be configured by introducing a suitable impedance element into the circuit of the first radiator 12 . In the embodiment shown in FIG. 2 , the antenna device 100 may further include an impedance element 70, and the first radiator 12 may further include a third ground point 129 disposed between the free end 122 and the feeding point 127, the third ground point 129 Site 129 is grounded through impedance element 70 . The equivalent electrical length after the first radiator 12 is grounded through the impedance element 70 enables the first radiator 12 to work in the first resonant mode. Further, the impedance element 70 may include a capacitor or an inductor. When the physical physical length of the first radiator 12 is too short to form the first resonant mode, the third ground point 129 can be grounded through a capacitor to adjust the equivalent electrical length of the first radiator 12 to support the first resonant mode . When the physical physical length of the first radiator 12 is too long to form the first resonance mode, the third ground point 129 can be grounded through inductance to adjust the equivalent electrical length of the first radiator 12 to support the first resonance mode . In other embodiments, the impedance element 70 may include a capacitor and an inductor at the same time, and the capacitor and the inductor may be connected to the third ground point 129 through a switch (not shown in the figure). When the first radiator 12 needs to work in the first In the resonant mode, the capacitor or inductor can be connected to the loop by switching the switch. It should be understood that the capacitance value of the capacitor and the inductance value of the inductor may be set according to a specific working frequency band of the first radiator 12 , which is not limited in this embodiment of the present application.

Further, in this embodiment, in order to ensure that the first radiator 12 can support the first frequency band and the second frequency band, the antenna device 100 may also include a frequency band selection circuit 50, one end of the frequency band selection circuit 50 is grounded, and the other end is connected to the radiator 10 The frequency band selection circuit 50 is configured to connect different impedance elements into the loop of the antenna device 100, so that the radiator 10 can switchably radiate radio frequency signals of different frequency bands.

The frequency band selection circuit 50 can be connected to the part from the feeding point 127 to the free end 122 on the first radiator 12, which is used to adjust the equivalent electrical length of the first radiator 12, so that the first radiator 12 supports the first band or second band. In the embodiment of the present application, the frequency band selection circuit 50 may include a plurality of parallel-connected adjustment inductors L1, and the frequency band selection circuit 50 is configured to connect at least one of the plurality of adjustment inductors L1 into the loop of the first radiator 12, so as to Adjust the equivalent electrical length of the first radiator 12 so that the first radiator 12 supports multiple sub-bands of the second frequency band. When the second frequency band is a low-frequency band, its frequency range can be 0.703GHz～0.894GHz. Can include B5 (uplink frequency range 0.824～0.849GHz, downlink frequency range 0.869～0.894GHz), B8 (uplink frequency range 0.880～0.915GHz, downlink frequency range 0.925～0.960GHz), B28 (uplink frequency range 0.703～0.748GHz, downlink frequency range 0.758～0.803 GHz). In this embodiment, the frequency band selection circuit 50 can be connected to the third ground point 129 , and the third ground point 129 can also be grounded through the frequency band selection circuit 50 . For example, the frequency band selection circuit 50 may be grounded directly or connected in parallel with the impedance element 70 to be grounded.

The above-mentioned embodiments of the present application provide a possible structure of the radiator 10, in which the electrical connection relationship between the first radiator 12 and the second radiator 14 is realized by direct physical structure connection. The present application will also provide some other embodiments. In some other embodiments, there may not be a direct physical connection relationship between the first radiator 12 and the second radiator 14. For example, the two may be spaced apart from each other. The electrical connection relationship can be realized through the structure of electrical coupling or magnetic coupling.

Please refer to FIG. 4 . FIG. 4 shows a possible structure of the radiator 10 in these embodiments. The first radiator 12 and the second radiator 14 of the radiator 10 are arranged at intervals, and a gap 16 is formed therebetween. It should be understood that the gap 16 may be a gap part opened on the radiator 10. For example, when the radiator 10 is prepared, the gap 16 is formed on the base material of the radiator 10 by cutting, stamping, etc., so that the radiator 10 is divided into a first radiator 12 and a second radiator 14; in some other embodiments, the gap 16 can be an assembly gap part of the radiator 10, for example, the radiator 10 is composed of the first radiator 12 and the second radiator 14, when the first radiator 12 and the second radiator 14 are assembled, there is a predetermined distance between them, so the space between the first radiator 12 and the second radiator 14 forms the gap 16.

In this embodiment, the first radiator 12 is directly connected to the feed circuit 30 through the feed point 127, and the second radiator 14 is not directly connected to the feed circuit 30, but the first radiator 12 serves as the second radiator. The body 14 is coupled to the feed, so that the second radiator 14 can radiate radio frequency signals. The first radiator 12 receives the first excitation current sent by the feed circuit 30 to radiate the signal of the first frequency band, and the radiated energy is coupled to the second radiator 14, so that the second radiator 14 radiates the signal of the third frequency band, due to the first The central frequency point of the frequency band is within the frequency range of the third frequency band, so that the first radiator 12 and the second radiator 14 can jointly radiate signals of at least part of the frequency band (such as signals corresponding to high SAR values (B1, B3 frequency bands, etc.) ), the excitation current is shunted by the first radiator 12 and the second radiator 14, which can balance the current concentration of the antenna device 100 to a certain extent, thereby effectively reducing the overall SAR value of the antenna device 100.

It should be understood that this embodiment does not limit the specific feeding form of coupling between the first radiator 12 and the second radiator 14 . For example, as an example, the first radiator 12 can couple and feed the second radiator 14 in the form of slot coupling. At this time, the gap 16 between the first radiator 12 and the second radiator 14 can be used as Coupling slot; as another example, the first radiator 12 can couple and feed the second radiator 14 by configuring the dedicated first connection end 123 as a coupling part, then the first radiator 12 and the second radiator 14 The gap 16 is the gap between the dedicated coupling part and the second radiator 14 . Further, it should be understood that the specific shape of the gap 16 is not limited, and it should be understood as a space defined by the boundary structures of the opposite parts of the first radiator 12 and the second radiator 14 that are spaced apart from each other, for example, When the ends of the first radiator 12 and the second radiator 14 are facing each other, the specific shape of the gap 16 can be the gap between the ends of the first radiator 12 and the second radiator 14; When the sides of the first radiator 12 and the second radiator 14 face each other (for example, they are substantially parallel), the specific form of the gap 16 can be a gap between the side edges of the first radiator 12 and the second radiator 14 .

The antenna device 100 provided in this embodiment will be further described below with reference to FIG. 4 , so as to introduce the coupling feeding form, coupling feeding structure and working principle of the radiator 10 . For the sake of brevity, the radiator 10 (including the second radiator 14 and the first radiator 12, etc.) Each part of the body 10 can actually have a certain width; similarly, each part of the radiator 10 appears as a relatively flat structure in the figure, however, in practice, in order to avoid such as the microphone hole of the electronic device, the earphone Jacks, receiver holes and other parts, each part of the radiator 10 may have certain features such as bends, holes, and gaps. The actual specific shape of the radiator 10 should not be limited by the drawings provided in the embodiments of this application.

In this embodiment, the first connection end 123 of the first radiator 12 is spaced apart from the second connection end 141 of the second radiator 14, and the first connection end 123 is coupled to the second connection end 141 so that the second connection The end 141 is electrically connected to the feed source of the feed circuit 30 via the first connection end 123 and the feed point 127 .

In this embodiment, the first radiator 12 further includes a main body portion 121 , the main body portion 121 is substantially straight and strip-shaped, and the first connecting end 123 and the free end 122 are respectively located at opposite ends of the main body portion 121 . The first connecting end 123 can have a certain extension length, and it can be continuous with the main body 121 . The whole formed by the first connecting end 123 and the main body 121 is generally straight, and the whole generally extends along the first direction X. The first connecting end 123 and the second radiator 14 are relatively spaced apart in the second direction Y to couple the radiant energy to the second radiator 14 . Wherein, the second direction Y intersects the first direction X, and the angle between them may be greater than or equal to 45 degrees. In this embodiment, the second direction Y and the first direction X may be perpendicular to each other.

Specifically, in this embodiment, the first connection end 123 is connected to an end of the main body 121 close to the second radiator 14, and at least part of the structure of the first connection end 123 and the second radiator 14 is overlapped to realize alignment. Coupling feed of the second radiator 14 . It should be understood that, in the embodiment of the present application, "overlapping" two components means that projections of the two components in the same direction have overlapping parts. For example, the first connecting end 123 and at least a part of the second radiator 14 are overlapped, that is, the projections of the first connecting end 123 and at least a part of the second radiator 14 in one direction have overlapping parts, for example, the first Projections of the connection end 123 and the second radiator 14 along the second direction Y have overlapping portions. Specifically, in this embodiment, the first connecting end 123 is roughly in the shape of a strip, which is generally extended along the first direction X, and at least a part of the first connecting end 123 and the second radiator 14 are spaced side by side in the second direction Y. Set (for example, the two can be substantially parallel), the above-mentioned gap 16 is formed between the first connecting end 123 and the second radiator 14 .

When the feed circuit 30 feeds power to the first radiator 12, the excitation current passes through the main body 121 and reaches the first connection end 123. At this time, the first radiator 12 radiates the signal of the first frequency band, and the radiation can pass through the gap 16 to excite the The current on the second radiator 16 thus resonates, and at this time, the first radiator 12 radiates signals in the third frequency band. The center frequency of the first frequency band and the center frequency of the third frequency band can both be within the frequency band range of 1.7-2.2GHz. For example, both the third frequency band and the first frequency band can be 1.7GHz-2.2GHz. This frequency band covers B1 /B3 frequency band range, then the first radiator 12 and the second radiator 14 can both support signals whose working frequency band is the B1/B3 frequency band; The frequency range of the B1 frequency band is specified. At this time, the first frequency band may be 1.7 GHz to 2 GHz, and the frequency range covers the frequency ranges of the B1 and B3 frequency bands, and also covers the frequency range of the third frequency band.

The length of the first connecting end 123 is the length of the coupling region between the first radiator 12 and the second radiator 14. It has been verified in practice that when the length is not less than 3mm, the distance between the first radiator 12 and the second radiator 14 can be guaranteed. normal current excitation effect. Furthermore, if the distance between the first connection end 123 and the parasitic unit 14 is too large, the current may not be transmitted normally. If the distance is too small, the current excitation effect may not be generated. Therefore, the distance may be 1-3 mm, which may be Ensure the normal current excitation effect between the first radiator 12 and the second radiator 14, that is, the second radiator 14 can load the first radiator 12 and shunt the feed, so as to reduce the SAR value.

In this embodiment, the grounding point 127 and the third feeding point 129 are arranged on the main body 121 at intervals, and the feeding point 127 is closer to the first connecting end 123 than the third grounding point 129, so that the first radiation The body 12 roughly forms an IFA (Inverted-F Antenna, IFA) antenna structure, which is small in size, simple in structure, easy to match, and low in manufacturing cost.

Please refer to FIG. 5 , in some embodiments, the first radiator 12 may further include a first extension portion 125, the first extension portion 125 is connected to the end of the main body portion 121 away from the first connection end 123, which is used to ensure the first The radiator 12 has sufficient physical length, so that the first radiator 12 can work in the second frequency band (such as a low frequency band). In this embodiment, the first extension portion 125 can be regarded as the free end 122 of the first radiator 12 . The first extension portion 125 is bent relative to the main body portion 121 . Further, the first extension portion 125 is substantially in the shape of a bar, which is substantially extended along the second direction Y. In this embodiment, the first extension part 125 is bent relative to the main body part 121, so that the coverage area of the radiator 10 can be reduced, and the first radiator 12 can be adapted to the structure of the electronic device (such as the structure of the electronic device). frame structure, etc., the first radiator 12 can be used as a frame antenna of an electronic device).

Further, in this embodiment, the second radiator 14 is approximately in an “L” shape, and further includes a second extension portion 143 connected to the second connection end 141 .

In this embodiment, the second connecting end 141 is substantially in the shape of a straight strip, which extends substantially along the first direction X. As shown in FIG. The second connection end 141 is at least partly disposed opposite to the first connection end 123 in the second direction Y. It should be understood that, in this specification, two parts are "at least partly arranged at a distance from each other", which can be understood as that all/one end/or half/or 1/3 of the length of the two parts are relatively spaced or overlapped . For example, the second connection end 141 is at least partially spaced apart from the first connection end 123, that is, all/or half or 1/3 of the length of the second connection end 141 is relatively spaced or overlapped with the first connection end 123. of. At least part of the structure of the second connection end 121 is relatively spaced from the first connection end 123, so that the second connection end 121 can receive the energy transmitted through the first connection end 123, thereby exciting the current on the second radiator 14, so that the second connection end 121 The two radiators 14 generate resonance.

The second extension portion 143 is connected to an end of the second connection end 141 away from the first radiator 12 , and is bent relative to the second connection end 141 . The second extension part 143 is used to ensure that the second radiator 14 has a sufficient physical length so that the second radiator 14 can work in a third frequency band (such as an intermediate frequency band). In this embodiment, the second extension portion 143 is substantially strip-shaped, and is substantially extended along the second direction Y, and is spaced apart from the first extension portion 125 . In this embodiment, the second extension part 143 is bent relative to the second connection end 141, so that the coverage area of the radiator 10 can be reduced on the basis of ensuring a sufficient physical length, and the second radiator 14 can be adapted to the application The structure of the electronic device (such as the frame structure of the electronic device, etc.).

In this embodiment, the second grounding point 147 of the second radiator 14 is set on the second connecting end 141 instead of on the second extension portion 143, thereby forming an IFA antenna structure, which is small in size, simple in structure, Easy to match and low cost to prepare. Certainly, in other embodiments, the second grounding point 147 may also be disposed on the second extension portion 143 .

In the embodiment shown in FIG. 5 , the first radiator 12 and the second radiator 14 are roughly arranged in parallel and spaced apart to realize coupling feeding to the second radiator 14. It should be understood that, in other embodiments, The first radiator 12 and the second radiator 14 can use each other's setting space to form a basically nested or nested relationship to realize coupling and feeding to the second radiator 14, so that the coverage of the antenna device 100 can be further reduced. area. For example, referring to FIG. 6, in the embodiment shown in FIG. 6, the first radiator 12 utilizes its own shape to form a gap 110, and at least part of the structure of the second radiator 14 is accommodated in the gap 110, so that The structure of the radiator 10 is more compact.

Specifically, the notch 110 is formed at an end of the first radiator 12 close to the second radiator 14 , which is jointly defined by the side of the first connecting end 123 and the end of the main body 121 . Please also refer to FIG. 7 , the first connecting end 123 has a first width W1 along the second direction Y, the main body portion 121 has a second width W2 along the second direction Y, the first width W1 is smaller than the second width W2, and the second When a connecting end 123 is connected to the end of the main body 121, one side of the first connecting end 123 is flush with the corresponding side of the main body 121. The side forms a stepped structure, so that the first connecting end 123 and the main body 121 jointly define the above-mentioned gap 110, at least part of the structure of the second connecting end 141 of the second radiator 14 is accommodated in the gap 110, and the second connecting end 141 It is relatively spaced from the end of the main body 121 , so that the area covered by the radiator of the antenna device 100 can be reduced.

Further, please refer to FIG. 8 , in some embodiments, the second radiator 14 may further include a protruding portion 145 , and the protruding portion 145 is connected to the connection between the second extension portion 143 and the second connection end 141 . In this embodiment, the whole formed by the protruding portion 145 and the second extension portion 143 extends along the second direction Y, so that the protruding portion 145 protrudes on the side opposite to the second connecting end 141. At this time, the protruding The portion 145 and the second connecting end 141 also jointly define a notch (not shown), the first connecting end 123 is located in the notch, and the protruding portion 145 is spaced apart from the end of the first connecting end 123 . In this embodiment, the protruding portion 145 is used to ensure the length of the second radiator 14 and the higher radiation efficiency, and at the same time, the first radiator 12 and the second radiator 14 can be formed by using the mutual installation space to form a basic structure. The nested or nested relationship further reduces the coverage area of the radiator 10 .

In this embodiment, the feeding circuit 30 may include a feeding source 32 and a matching circuit 34, the matching circuit 34 is connected between the feeding source 32 and the feeding point 127 of the main body 121, and the matching circuit 34 supplies A radiator 12 is fed with excitation current, so that the main body 121 of the first radiator 12 radiates signals of the first frequency band or the second frequency band.

In this embodiment, the frequency band selection circuit 50 includes a switch module 52 and at least two frequency band selection branches 54, at least two frequency band selection branches 54 are connected in parallel, and the switch module 52 is connected to at least two frequency band selection branches 54. The frequency band selection circuit 50 is configured to selectively connect at least one of the at least two frequency band selection branches 54 into the loop of the first radiator 12 through the switch module 52, so that the first radiator 12 can be based on the first The excitation current can switchably radiate signals of the first frequency band or the second frequency band, or sub-bands of these frequency bands.

Further, when an appropriate frequency band selection branch 54 (such as a branch including an inductor) is connected to the loop of the first radiator 12, the first radiator 12 is configured to receive the second excitation current via the feeding point 127 to radiate signals in the second frequency band, the second frequency band is lower than the first frequency band and lower than the third frequency band, it should be understood that "the second frequency band is lower than the first frequency band and lower than the third frequency band" refers to the second The frequency range of the frequency band is lower than the frequency range of the first frequency band and lower than the frequency range of the third frequency band, which may have the following specific circumstances: for example, the highest frequency of the second frequency band is lower than the lowest frequency of the first frequency band and lower than The lowest frequency of the third frequency band; as another example, the highest frequency of the second frequency band is lower than the lowest frequency of the first frequency band, or lower than the lowest frequency of the third frequency band. In some embodiments, the second frequency band may be a low frequency band, the third frequency band and the first frequency band may be an intermediate frequency band. When the first radiator 12 radiates the signal of the second frequency band, the second radiator 14 does not generate resonance about the second frequency band, therefore, the first radiator 12 can independently resonate the signal of the specified frequency band in response to the second excitation current, In addition, in response to the first excitation current, it can respectively resonate with the second radiator 14 for a signal of another specified frequency band, which broadens the resonant frequency range of the antenna device 100 .

The above-mentioned antenna device 100 is equipped with a frequency band selection circuit 50 for the first radiator 12, and at least one of the at least two frequency band selection branches 54 is connected to the loop of the first radiator 12 through the switch module 52, and can use Different frequency band selection branches 54 adjust the impedance matching of the first radiator 12, so that the first radiator 12 can work in different frequency bands, such as multiple sub-bands of the second frequency band, thereby widening the working frequency band of the first radiator 12 , and avoid adding conductive branches in order to add different frequency bands, to a certain extent, the cost of the antenna device 100 is lower and the occupied space is smaller. Further, in the antenna device 100 described above, one end of the frequency band selection circuit 50 is grounded, and the other end is directly connected to the first radiator 12, and different frequency band selection branches 54 can be optionally connected in parallel to the loop, so that different frequency band selection circuits can be used. The different access states of the branch 54 realize more working frequency bands, and the stability of frequency modulation is higher.

Please refer to FIG. 9, in some embodiments, at least two frequency band selection branches 54 include a first branch 541 and a second branch 543, one end of the first branch 541 is grounded, the other end is connected to the main body 121, and the second The branch 543 is connected in parallel with the first branch 541 . The first branch 541 and the second branch 543 are provided with impedance elements with different impedance values to change the impedance of the loop when connected to the loop of the first radiator 12, thereby adjusting the first radiator 12 to a suitable Impedance matching to radiate signals in the desired frequency band. In some embodiments, the first branch 541 includes a first capacitor C1, and the second branch 543 includes a first inductor L1. The first capacitor C1 is connected in parallel with the first inductor L1 , both of which are controlled by the switch module 52 . The switch module 52 selectively connects the first capacitor C1 and/or the first inductor L1 into the loop of the first radiator 12 . The capacitance value of the first capacitor C1 and the inductance of the first inductor L1 may be set according to a specific working frequency band of the first radiator 12 , which is not limited in this embodiment of the present application.

Please refer to FIG. 10, in some embodiments, at least two frequency band selection branches 54 also include a third branch 545 and a fourth branch 547, one end of the third branch 545 is grounded, and the other end is connected to the main body 121. The fourth branch 547 is connected in parallel with the third branch 545 . Furthermore, the fourth branch 547 , the third branch 545 , the second branch 543 are connected in parallel with the first branch 541 , and are all connected to the switch module 52 . The fourth branch 547 and the third branch 545 are provided with impedance elements with different impedance values to change the impedance of the loop when connected to the loop of the first radiator 12, thereby adjusting the first radiator 12 to a suitable Impedance matching to radiate signals in the desired frequency band. In some embodiments, the third branch 545 includes the second inductor L2, and the fourth branch 547 includes the third inductor L3. The third inductor L3 , the second inductor L2 , the first capacitor C1 , and the first inductor L1 are connected in parallel, and all are controlled by the switch module 52 . In this embodiment, the inductances of the first inductor L1, the second inductor L2, and the third inductor L3 are different. The switch module 52 selectively connects at least one of the first capacitor C1 , the first inductor L1 , the third inductor L3 , and the second inductor L2 into the loop of the first radiator 12 to obtain signals of required frequency bands. The inductances of the first inductor L1, the second inductor L2, and the third inductor L3 can be set according to the specific working frequency band of the first radiator 12, which is not limited in this embodiment of the present application.

In this embodiment, the switch module 52 is connected to the frequency band selection branch 54 and is used to control the on-off of each frequency band selection branch 54 . The switch module 52 can be connected between the frequency band selection branch 54 and the main body 121 , and can also be connected between the frequency band selection branch 54 and the reference ground. In this embodiment, the switch module 52 includes at least two switches, and at least two switches are provided in one-to-one correspondence with at least two frequency band selection branches 54, and each switch is connected to a corresponding frequency band selection branch 54, so as to Controlling the on-off of the corresponding frequency band selection branch 54 . In this embodiment, each switch may be a single pole single throw switch or an electronic switch tube or the like. Wherein, the electronic switch tube may be a MOS tube, a transistor, and the like. In the embodiment of the present application, there is no further limitation on the specific components of the switch module 52 , as long as they meet the on-off control conditions for multiple frequency band selection branches 54 .

Through the frequency band switching module 50 provided in this embodiment, different frequency band selection branches 54 can be used to obtain signals of low frequency bands, and each frequency band under the LB frequency band, such as B5, B8, B28, etc., is subdivided into PRX The frequency band and the DRX frequency band are tuned, so the parallel connection of different frequency band selection branches 54 into the loop can improve the sideband performance of the antenna device 100 and prevent the low frequency bandwidth from being too narrow.

Please refer to FIG. 11. In some specific examples, the shape of the radiator 10 provided by the embodiment of the present application can be the shape of the frame antenna shown in FIG. A regular shape with a curved structure is beneficial to avoid parts such as microphone holes, earphone jacks, and receiver holes of electronic equipment. Although the specific shape of the radiator 10 shown in this embodiment is different from the shape of the radiator 10 in the drawings of the previous embodiments, it should be understood that the components, extensions, and orientations of the radiator 10 in this embodiment all cover The characteristics of the radiator 10 in the figures of the foregoing embodiments are described, and the specific structure of the radiator 10 shown in FIG. 11 should not be construed as a limitation to this solution.

Please refer to Fig. 12 and Fig. 13, Fig. 12 and Fig. 13 have shown the S parameter schematic diagram of the structure of the traditional antenna and the antenna device 100 of the embodiment shown in Fig. 11, as can be seen from the figure, the antenna provided by the present application Compared with the traditional antenna device, the device 100 produces more resonance (resonance point 1) of the 3/4 mode of the intermediate frequency band. This resonance mode corresponds to the resonance of the first radiator in the first frequency band. The resonance point in the figure 2 represents the resonance of the antenna device 100 in the third frequency band, and another resonance point represents the resonance of the antenna device 100 in the second frequency band.

Please refer to Fig. 14 and Fig. 15, Fig. 14 and Fig. 15 have shown two kinds of gray-scale simulation diagrams of the electric field distribution simulated by the structure of the antenna device 100 of the traditional antenna and the embodiment shown in Fig. 11, showing that when the antenna The electric field intensity radiated when the resonant frequency of the device 100 is in the lower frequency band (1.65 GHz) of the B3 frequency band. As shown in (A) in Figure 14, the B3 frequency band of the traditional radiator can only be generated by the second radiator, so that the current on the second radiator is too large, and the corresponding SAR value is relatively high. Figure 14 (B) shows that in the improved radiator 10 of the present application, the first radiator 12 can jointly radiate the signal of the B3 frequency band with the second radiator 14, and the current density on the first radiator 12 While increasing, the current density on the second radiator 14 is significantly reduced, and the maximum current density of the entire radiator 10 is reduced from 421.5A/m to 408A/m. It can be seen that the current on the radiator 10 of the antenna device 100 provided by the embodiment of the present application is relatively uniform, and the peak value of the current on the second radiator 14 is reduced, so that the antenna device 100 can achieve a significant SAR reduction effect.

Please refer to Fig. 16 and Fig. 17, Fig. 16 and Fig. 17 show the radiation efficiency diagram of the traditional antenna and the antenna device 100 provided by the embodiment shown in Fig. 11, as can be seen from the figure, compared with the conventional radiator The antenna of the antenna device 100 provided by the embodiment of the present application does not change greatly in antenna efficiency, and still maintains a better radiation efficiency. Therefore, by setting the first radiator 12 and the second radiator 14 in the antenna device 100, the first radiator 12 and the second radiator 14 can shunt the excitation current when the frequency band needs to reduce the SAR value, and improve the performance of the antenna device 100. The distribution of the electric field makes the maximum radiation intensity of the electric field in the frequency band where the SAR value needs to be reduced relatively low, and at the same time, the average value of the overall radiation does not decrease, and the antenna device 100 still has a high radiation efficiency.

Please refer to Table 1 below. Table 1 shows the total radiated power (TRP) of the traditional antenna and the antenna device 100 provided by the embodiment shown in FIG.

Table 1

From the test data in Table 1, it can be seen that the SAR value of the B3 frequency band dropped from 1.89W/Kg to 1.29W/kg, a drop of about 1.8dB, and the SAR value of the B1 frequency band dropped from 1.98W/Kg to 1.59W/kg. decreased by about 1dB. It can be seen that the antenna device 100 of the embodiment of the present application jointly radiates the radio frequency signal originally configured on the second radiator 14 by setting the first radiator 12 and the second radiator 14, that is, the two jointly radiate signals of at least one frequency band ( Such as B3, B1 frequency bands), when it is necessary to reduce the SAR value of the frequency band, the first radiator 12 and the second radiator 14 can shunt the excitation current, so that part of the current on the second radiator 16 is dispersed to the first radiator 12, thereby reducing the current peak value on the second radiator 16, and also making the SAR value of the antenna device 100 meet the specified requirements.

Therefore, the antenna device 100 provided in the embodiment of the present application includes a first radiator 12 and a second radiator 14, the second radiator 14 is spaced apart from the first radiator 12, and the first radiator 12 is configured to The electric point 127 receives the first excitation current to radiate the signal of the first frequency band. When the first radiator 12 works in the first frequency band, the first radiator 12 can couple and feed the second radiator 14, so that the second radiator 14 Working in the third frequency band, since the center frequency point of the first frequency band is within the frequency range of the third frequency band, the two can jointly radiate at least part of the signal of the third frequency band. The shunting of the first radiator 12 and the second radiator 14 can balance the current concentration of the antenna device 100 to a certain extent, thereby reducing the current peak value of the second radiator 14 and making the SAR value of the antenna device 100 meet the specified requirements.

The first radiator 12 provided in the above-mentioned embodiments of this specification couples and feeds the second radiator 14 through the dedicated first connection end 123. It should be understood that, in other embodiments, the first radiator 12 can be The second radiator 14 is coupled and fed in the form of slot coupling. At this time, the gap 16 between the first radiator 12 and the second radiator 14 can be used as a coupling slot, as shown in FIG. 18 .

Please refer to FIG. 18 , in the embodiment shown in FIG. 18 , one end of the first radiator 12 is spaced apart from one end of the second radiator 14 , that is, one end of the first connecting end 123 is connected to the second connecting end 141 One end of the two radiators is arranged at a distance from each other, so that a coupling gap 16 is formed between the second radiator 14 and the first radiator 12. When the first radiator 12 radiates signals in the first frequency band, the radiated energy is coupled to the second radiator through the coupling gap 16. 14, so that the first radiator 12 and the second radiator 14 are coupled and fed through the coupling gap 16 to split the excitation current. At this time, the width of the gap 16 can be greater than or equal to 0.8mm and less than or equal to 1.5mm, for example, the width of the gap 16 can be 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc. wait.

Referring to FIG. 19 , the embodiment of the present application also provides an electronic device 200 , which may be, but not limited to, an electronic device such as a mobile phone, a tablet computer, or a smart watch. The electronic device 200 in this embodiment will be described by taking a mobile phone as an example.

In the embodiment of the present application, the electronic device 200 may further include a casing 1001 and a display screen 1003 and an antenna device 1004 disposed on the casing 1001 . The display screen 1003 is connected to the housing 1001 , and the antenna device 1004 is integrated in the housing 1001 .

In some implementations, the display screen 1003 generally includes a display panel, and may also include a circuit for responding to a touch operation on the display panel. The display panel can be a liquid crystal display panel (Liquid Crystal Display, LCD), and in some embodiments, the display panel can also be a touch screen.

Specifically, in the embodiment of the present application, the casing 1001 includes a rear case 1010 and a middle frame 1011 , and the rear case 1010 and the display screen 1003 are respectively disposed on opposite sides of the middle frame 1011 .

Referring to FIG. 20 , the middle frame 1011 can be integrally formed, and structurally can be divided into a bearing portion 1012 and a frame 1013 surrounding the bearing portion 1012 . It should be understood that the "carrying part 1012" and "frame 1013" are just named divisions for the convenience of expression, and the structure filled with oblique lines in the figure is only for distinguishing and marking, and does not represent the actual structure of the two. There may not be an obvious dividing line between them, or two or more components may be assembled together. The naming of "carrying part 1012" and "frame 1013" should not limit the structure of the middle frame 1011. The carrying part 1012 is used to carry a part of the structure of the display screen 1003, and can also be used to carry or install electronic components of the electronic device 200 such as the motherboard 1005, the battery 1006, the sensor module 1007, etc., and the frame 1013 is connected to the periphery of the carrying part 1012. Further, the frame 1013 is disposed around the outer periphery of the carrying portion 1012 and protrudes relative to the surface of the carrying portion 1012 so that the two together form a space for accommodating electronic components. In this embodiment, the display screen 1003 is covered by the frame 1013 , and the frame 1013 , the rear case 1010 and the display screen 1003 together form the appearance surface of the electronic device 200 .

In this embodiment, the antenna device 1004 can be any antenna device 100 provided in the above embodiments, or can have any one or a combination of features of the antenna device 100 above. The embodiment will not be described in detail.

In some implementations, the antenna device 1004 is integrated into the housing 1001 , for example, the antenna device 100 may be disposed on the middle frame 1011 or the rear case 1010 , which is not limited in this specification. Roughly the same as the aforementioned antenna device 100, the antenna device 100 of this embodiment may include a first radiator 12 and a second radiator 14, and both the first radiator 12 and the second radiator 14 may be disposed on the middle frame 1011 or the rear Shell 1010.

Further, in the embodiment shown in FIG. 20 , the frame 1013 is at least partially made of metal, and the antenna device 1004 is integrated into the frame 1013 . In this embodiment, the frame 1013 includes at least part of a metal structure, and the metal structure forms the radiator 10 . In this way, using the metal frame 1013 as a part of the radiator 10 of the antenna device 1004 helps to save space in the electronic device 200 and provides a larger headroom for the antenna device 1004, which is beneficial to ensure higher radiation efficiency. Further, the radiator 10 can be one of a flexible circuit board antenna radiator, a laser direct molding antenna radiator, and a printing direct molding antenna radiator. Of course, the radiator 10 can also be a metal branch, which can be directly attached to the 1013 s surface.

Further, in the embodiment of the present application, the frame 1013 may include a top frame 1017 and a bottom frame 1019, and the top frame 1017 and the bottom frame 1019 are respectively arranged at opposite ends of the bearing part 1012, so the top frame 1017 and the bottom frame 1019 are approximately mutually Deviate from. The aforementioned radiator 10 may be integrated into at least one of the top frame 1017 and the bottom frame 1019 . In the application, the top frame 1017 and the bottom frame 1019 are respectively located at the top and the bottom of the electronic device 200, therefore, when the radiator 10 can be integrated into at least one of the top frame 1017 and the bottom frame 1019, the antenna device 1004 can be used as the electronic device 200 The top antenna or/and the bottom antenna, which produce a lower SAR value, are more beneficial to human health. It should be understood that the above-mentioned "top" and "bottom" refer to the normal use state of the electronic device 200, for example, when the length direction of the electronic device 200 is placed vertically and the display screen 1003 faces the user, the electronic device is relatively high from the ground. The far end is considered the "bottom" and the other end is considered the "top".

Please refer to FIG. 21 . FIG. 21 shows a schematic structural diagram of an antenna device 100 integrated in a housing 1011 in an embodiment of the present application (the antenna device 100 of the embodiment shown in FIGS. 8-11 ). In this embodiment, the antenna device 100 is a flexible circuit board antenna attached to the bottom frame 1019 of the frame 1013 . At least part of the structure of the radiator 10 extends along the structure of the bottom frame 1019 , and has portions bent along corners of the bottom frame 1019 (such as the first extension portion 125 and the second extension portion 143 ).

In the antenna device and electronic equipment provided in the embodiments of the present application, the antenna device includes a first radiator and a second radiator, the first radiator includes a free end, a first connection end, and a connection between the free end and the first connection end. The feed point between the feed point and the first ground point, the feed point is used to connect the feed source; the second radiator includes a second connection end and a second ground point, the second connection end is electrically connected to the first connection end. The first radiator is used to support the first frequency band and the second frequency band, and the first frequency band and the second frequency band are different; the second radiator is used to support the third frequency band, and the center frequency point of the first frequency band is within the frequency range of the third frequency band Inside. Therefore, by setting the first radiator to be able to support the first frequency band, and the center frequency point of the first frequency band is within the frequency range of the third frequency band, when the second radiator radiates the signal of the third frequency band, the first radiation The body can generate resonance about the third frequency band, and the two can jointly radiate at least part of the signal of the frequency band (that is, the signal of the third frequency band), so that the current corresponding to the third frequency band on the second radiator is shunted by the first radiator, The current distribution of the second radiator can be improved, so that the current concentration of the antenna device can be balanced to a certain extent, thereby effectively reducing the overall SAR value of the antenna device.

Therefore, the antenna device provided by the embodiment of the present application has a lower SAR value. It should be noted that, in the description of this application, when a component is considered to be "set on" another component, it may be connected to or directly set on another component, or there may be an intermediate component (that is, both indirect connection). In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments" or "other embodiments" mean that specific features, structures, materials described in connection with the embodiment or examples, or specifically included in the In at least one embodiment or example of the present application. In this specification, schematic representations of terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine features of different embodiments or examples described in this specification under the condition of not contradicting each other.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

An antenna device, comprising:

The first radiator, the first radiator includes a free end, a first connection end, and a feed point and a first ground point arranged between the free end and the first connection end, the feed point Used to connect the feed;

a second radiator, the second radiator includes a second connection end and a second ground point, the second connection end is electrically connected to the first connection end;

The first radiator is used to support the first frequency band and the second frequency band, the first frequency band and the second frequency band are different; the second radiator is used to support the third frequency band, the first frequency band The central frequency point is within the frequency range of the third frequency band.
The antenna device according to claim 1, wherein the first connection terminal is directly connected to the second connection terminal, so that the second connection terminal passes through the first connection terminal, the feeding point and The feed is electrically connected.
The antenna device according to any one of claims 1-2, wherein the first connection end is spaced apart from the second connection end, and the first connection end is coupled to the second connection end to The second connection end is electrically connected to the feed source via the first connection end and the feed point.
The antenna device according to any one of claims 1-3, wherein the first radiator further comprises a main body part disposed between the first connection end and the free end, and the first connection The end and the main body part extend along a first direction, the second connection end and the first connection end are arranged at intervals relative to each other in a second direction, and the second direction is perpendicular to the first direction.
The antenna device according to claim 4, wherein said first connecting end has a first width along said second direction, said main body portion has a second width along said second direction, said first The width is smaller than the second width, so that the first connection end and the main body jointly define a notch, and the second connection end is accommodated in the notch.
The antenna device according to any one of claims 1-5, wherein the second radiator further comprises a protrusion, the protrusion is disposed at one end of the second connection end, and the protrusion The portion is arranged at a distance from the end of the first connection end.
The antenna device according to any one of claims 1-6, wherein a designated current path is formed on the first radiator from the feeding point to the free end, and the higher-order mode of the designated current path is For forming a first resonance mode, the first resonance mode is characterized by the resonance of the first frequency band generated by the first radiator, so as to disperse the current distribution corresponding to the third frequency band on the second radiator;

The fundamental mode of the specified current path is used to form a second resonance mode different from the first resonance mode; the second resonance mode indicates that the first radiator produces resonance in the second frequency band.
The antenna device according to claim 7, wherein the equivalent electrical length of the first radiator enables the first radiator to work in the first resonant mode.
The antenna device according to any one of claims 7-8, wherein, the first radiator further comprises a third grounding point arranged between the free end and the feeding point, the third The grounding point is grounded through the impedance element; the equivalent electrical length of the first radiator after being grounded through the impedance element enables the first radiator to work in the first resonant mode and the second resonant mode.
The antenna device according to claim 9, wherein the impedance element comprises a capacitor or/and an inductor.
The antenna device according to any one of claims 9-10, wherein the antenna device further comprises a frequency band selection circuit connected to the first radiator, the frequency band selection circuit is configured to adjust the first The equivalent electrical length of the radiator, so that the first radiator supports the first frequency band or the second frequency band.
The antenna device according to claim 11, wherein the frequency band selection circuit comprises a plurality of parallel adjustment inductances, and the frequency band selection circuit is configured to connect at least one of the plurality of adjustment inductances to the first In the loop of the radiator, the equivalent electrical length of the first radiator is adjusted so that the first radiator supports multiple sub-frequency bands of the second frequency band.
The antenna device according to any one of claims 11-12, wherein the third ground point is also grounded through the frequency band selection circuit; or,

The frequency band selection circuit is connected in parallel with the impedance element.
The antenna device according to any one of claims 1-13, wherein the distance between the feeding point and the free end is greater than the distance between the feeding point and the first connecting end; the first grounding point The distance from the free end is greater than the distance between the first ground point and the first connection end, and the first ground point is grounded through an inductance.
The antenna device according to any one of claims 1 to 14, wherein the feed point is at the same potential as the first ground point, or,

The feeding point is the same point as the first grounding point.
The antenna device according to any one of claims 1 to 15, wherein the second frequency band is lower than the first frequency band and lower than the third frequency band.
The antenna device according to any one of claims 1-16, wherein the first frequency band and the third frequency band are intermediate frequency bands, and the second frequency band is low frequency band; or,

The central frequency point of the third frequency band is within the frequency range of the intermediate frequency band; or

Both the central frequency point of the first frequency band and the central frequency point of the third frequency band are within the frequency band range of 1.7-2.2 GHz.
The antenna device according to any one of claims 1 to 17, wherein the first radiator is any one of a flexible circuit board radiator, a laser direct molding radiator, a printing direct molding radiator, or a metal radiator The second radiator is any one of a flexible circuit board radiator, a laser direct structuring radiator, a printing direct structuring radiator or a metal branch.
An electronic device, comprising a casing and the antenna device according to any one of claims 1 to 18, the first radiator and the second radiator are integrated in the casing.
The electronic device according to claim 19, wherein the housing comprises a bearing part and a top frame and a bottom frame connected to the bearing part, and the top frame and the bottom frame are located opposite to the bearing part respectively. At both ends, the first radiator and the second radiator are integrated on the bottom frame.
An electronic device, comprising a frame and the antenna device according to any one of claims 1 to 18, the material of the frame includes metal, and the antenna device is integrated into the frame.