WO2024098969A1 - Antenna apparatus and electronic device - Google Patents

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 is provided with a feed point and a first ground point, the feed point is connected to a feed source, and the first radiator is used for supporting a first frequency band and a second frequency band of 5G signals. The second radiator and the first radiator are arranged at an interval, and the second radiator is provided with a second ground point. There is a gap between the second radiator and the first radiator; when the first radiator radiates a signal of the second frequency band, the radiation energy is coupled to the second radiator by means of the gap, so that the second radiator and the first radiator can jointly support the second frequency band of 5G signals; the center frequency of the second frequency band is within the frequency band range of the first frequency band. Thus, the current is shunted by the first radiator and the second radiator, and current concentration of the antenna apparatus when supporting 5G signals can be alleviated to a certain extent, thereby making the SAR value of the antenna apparatus relatively low.

Description

Antenna device and electronic equipment

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese application No. 202211413917.5, filed on November 11, 2022, the entire contents of which are hereby incorporated by reference for all purposes.

Technical Field

The present application relates to the field of mobile communication technology, and more specifically, to an antenna device and an electronic device.

Background technique

With the development and progress of science and technology, communication technology has achieved rapid development and great progress. With the improvement of communication technology, the popularity of smart electronic products has reached an unprecedented level. More and more smart terminals or electronic devices have become an indispensable part of people's lives, such as smart phones, smart bracelets, smart watches, smart TVs and computers. At present, communication antennas are usually set in electronic devices to meet the communication needs of users. With the increasing demand for communication efficiency and types, the power of antennas in electronic devices is also increasing, resulting in greater radiation effect of antennas on the human body, which will have an adverse effect on the human body.

Summary of the invention

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

According to the 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 is provided with a feeding point and a first grounding point, the feeding point is used to connect a feed source; the first radiator is used to support the first frequency band and the second frequency band of the fifth generation mobile communication technology (5th Generation Mobile Communication Technology, 5G) signal. The second radiator is spaced apart from the first radiator, and the second radiator is provided with a second grounding point. A gap is provided between the second radiator and the first radiator, and when the first radiator radiates the signal of the second frequency band, the radiation energy is coupled to the second radiator through the gap, so that the second radiator can support the second frequency band of the 5G signal together with the first radiator, and the center frequency of the second frequency band is within the frequency band range of the first frequency band.

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 arranged in the housing.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any 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 of FIG. 1 .

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

FIG. 4 is a schematic diagram showing dimensions of the antenna device of the embodiment of FIG. 3 .

FIG. 5 is a schematic structural diagram of an application example of the antenna device provided in an embodiment of the present application.

FIG. 6 is an S-parameter diagram of the antenna device shown in FIG. 5 .

FIG. 7 is a schematic diagram of a simulation of the radiation efficiency of the antenna device shown in FIG. 5 .

FIG. 8 is a schematic diagram of an actual test of the radiation efficiency of the antenna device shown in FIG. 5 .

FIG. 9 is a schematic diagram of device loss simulation of the antenna device shown in FIG. 5 when switching frequency bands through a tuning circuit.

FIG. 10 is a schematic diagram of electric field distribution of the antenna device shown in FIG. 5 when supporting LTE signals.

FIG11 is a schematic diagram of the electric field distribution of the antenna device shown in FIG5 when supporting the 5G signal N78 frequency band.

FIG12 is a schematic diagram of SAR hotspot distribution of the antenna device shown in FIG5 when supporting the 5G signal N78 frequency band.

FIG. 13 is a schematic diagram of an electronic device provided in an embodiment of the present application.

FIG. 14 is a schematic diagram of the internal structure of the electronic device shown in FIG. 13 .

Detailed ways

In order to enable those skilled in the art to better understand 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. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

If certain words are used in the specification and claims to refer to specific components, those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use differences in names as a way to distinguish components, but use differences in components' functions as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

As used in the embodiments of the present application, "electronic devices" include, but are not limited to, devices configured to receive/send communication signals via a wireline connection (e.g., via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and/or another data connection/network) and/or via a wireless interface (e.g., 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 another communication terminal). A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", "electronic device", and/or "electronic device". Examples of electronic devices include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet/intranet access, web browsers, notepads, calendars, and/or global positioning system (GPS) receivers; and conventional laptop and/or palmtop receivers, game consoles, or other electronic devices that include radiotelephone transceivers.

The Specific Absorption Rate (SAR) is usually called the absorption ratio or absorption rate, which refers to the electromagnetic wave energy absorption ratio of electronic equipment. The specific meaning is: under the action of the external electromagnetic field, an induced electromagnetic field will be generated in the human body. Since all organs of the human body are lossy media, the electromagnetic field in the body will generate induced currents, causing the human body to absorb and dissipate electromagnetic energy. SAR is often used in biodosimetry to characterize this physical process. The meaning of SAR is the electromagnetic power absorbed or consumed by unit mass of human tissue, in units of 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 conductivity of human tissue, expressed in S/m;

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

SAR in human tissue is proportional to the square of the electric field strength in the 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, the genetic characteristics of typical tissues of the exposed human body, 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 10g, and the US standard is less than 1.6mw/g per gram.

At present, the commonly used methods to reduce the SAR value are mainly the following: (1) directly reducing the antenna transmission power to reduce the absorption of electromagnetic waves by the human body, but it is difficult to ensure the total radiated power (TRP) requirement by reducing the antenna transmission power. If the TRP is too low, the communication quality is also low, which usually cannot meet the increasingly high communication requirements in the market; (2) reducing the antenna transmission power in different scenarios, using human tissue detection devices (SAR SENSOR), only reducing the transmission power when the human body is close to the electronic device, it is also difficult to ensure the total radiated power requirement; (3) using a power divider to transmit the antenna transmission power through multiple antennas, but the current development trend of electronic devices is that the thickness is getting thinner and thinner, resulting in smaller and smaller antenna space, and it is difficult to provide space for additional antennas; (4) adding a grounding branch under the antenna floor to make the current distribution on the antenna more uniform, but this solution is only for FPC type antennas, not for electronic devices with metal frames, and 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 response to the above problems, the inventors of the present application have found after extensive and repeated research that the SAR hotspots of the antennas of current electronic devices are basically concentrated in the areas with strong current distribution on the radiator, that is, the larger the current density on the radiator, the larger the corresponding SAR value. In this regard, the inventors propose the antenna device of the present application and an electronic device having the antenna device. The radiator of the antenna device includes a first radiator and a second radiator. The first radiator is provided with a feeding point and a first grounding point. The feeding point is used to connect the feed source; the first radiator is used to support the first frequency band and the second frequency band of the fifth generation mobile communication technology (5th Generation Mobile Communication Technology, 5G) signal. The second radiator is spaced apart from the first radiator, and the second radiator is provided with a second grounding point; a gap is provided between the second radiator and the first radiator. When the first radiator radiates the signal of the second frequency band, the radiation energy is coupled to the second radiator through the gap, so that the second radiator can jointly support the second frequency band of the 5G signal with the first radiator. The center frequency of the second frequency band is in the first frequency band. Within the frequency band of a frequency band. Therefore, by setting the second radiator to be able to support the second frequency band together with the first radiator, and the center frequency of the second frequency band is within the frequency band of the first frequency band, when the first radiator radiates the signal of the second frequency band, the second radiator can generate resonance about the second frequency band, and the two can jointly radiate the signal of at least part of the frequency band (that is, the signal of the second frequency band), so that the current corresponding to the second frequency band on the first radiator is shunted by the second radiator, which can improve the current distribution of the first radiator, thereby being able to improve the current concentration of the antenna device when supporting 5G signals to a certain extent, thereby effectively reducing the overall SAR value of the antenna device. Therefore, the antenna device provided in the embodiment of the present application has a lower SAR value when radiating 5G signals.

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

Referring to FIG. 1 , an embodiment of the present application provides an antenna device 100, which includes an antenna body 10 and a feed source 30 connected to the antenna body 10. The antenna body 10 is used to receive and transmit radio frequency signals, and the feed source 30 is used to feed an excitation current into the antenna body 10 so that the antenna body 10 can resonate to radiate radio frequency signals. The feed source 30 is suitable for being connected to the mainboard of an electronic device and can be controlled by the mainboard of the electronic device. The feed source 30 can be understood as a whole radio frequency (RF) circuit connected to the radio frequency front end of the antenna body 10. For example, the feed source 30 can include devices such as a radio frequency transceiver, a low noise power amplifier (Low Noise Amplifier, LNA), a power amplifier (Power Amplifier, PA), and a filter, wherein the radio frequency transceiver is used to control the signal (it can also be controlled by a processor in the electronic device). Furthermore, the radio frequency transceiver can be integrated with other devices (such as LNA, PA, filter, etc.) to form a chip module, which can be formed on the mainboard of the electronic device.

The antenna body 10 is used to send or/and receive signals of at least one working frequency band, which may include, for example, fifth generation mobile communication technology (5th Generation Mobile Communication Technology, 5G) new radio (New Radio, NR) signals, and its working frequency band may also include at least one frequency band of 5G NR, such as N1 band (1.92GHz-2.17GHz), N2 band (1.85GHz-1.99GHz), N38 band (2.570GHz-2.620GHz), N41 band (2.496GHz-2.690GHz), N78 band (3.30GHz-3.80GHz), etc.

The antenna body 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 can be realized by direct connection of a physical structure, or by an electrical coupling or magnetic coupling structure. For example, in the embodiment shown in FIG. 1, the first radiator 12 and the second radiator 14 are connected by a slot coupling structure, thereby realizing the electrical connection relationship between the two. Specifically, the second radiator 14 and the first radiator 12 are arranged at intervals, and a slot 16 is provided between the two, and the first radiator 12 and the second radiator 14 are coupled through the slot 16. It should be understood that the slot 16 can be a gap portion opened on the antenna body 10. For example, when preparing the antenna body 10, the slot 16 is formed on the substrate of the antenna body 10 by cutting, stamping, etc., so as to divide the antenna body 10 into the first radiator 12 and the second radiator 14. In other embodiments, the gap 16 may be an assembly gap portion of the antenna body 10. For example, the antenna body 10 is assembled from a first radiator 12 and a second radiator 14. When the first radiator 12 and the second radiator 14 are assembled, a predetermined distance is separated therefrom. Thus, 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 source 30 through the feeding point 127, and the second radiator 14 is not directly connected to the feed source 30, but the first radiator 12 couples and feeds the second radiator 14, so that the second radiator 14 can radiate radio frequency signals. It should be understood that although different figures are used in FIG. 1 to show the structures of the first radiator 12 and the second radiator 14, they are made for the convenience of explaining the scheme and should not be regarded as limiting the structure of the antenna body 10 provided in the present application. In the embodiment of the present application, the first radiator 12 can be any one of a flexible circuit board radiator, a laser direct forming radiator, a printed direct forming radiator, or a metal radiating branch (such as a metal inlay on the structure), and a metal frame antenna body. The second radiator 14 can also be any one of a flexible circuit board radiator, a laser direct forming radiator, a printed direct forming radiator, or a metal branch (such as a metal inlay on the structure), and a metal frame antenna body, and the material or forming method of the first radiator 12 and the second radiator 14 can be the same or different, and the present application does not limit this.

The first radiator 12 is provided with a feeding point 127 and a first grounding point 128, and the first grounding point 128 is located on the first radiator 12 and is adjacent to the feeding point 127. As an example, the first radiator 12 roughly forms an IFA (Inverted-F Antenna, IFA) antenna structure, which can make the impedance matching of the first radiator 12 better, and it has a small size, a simple structure, and a lower preparation cost.

In the embodiment of the present application, the first radiator 12 is used to support the first frequency band of the 5G signal. The feeding point 127 is used to connect the feed source in the feed source 30, and the feed source feeds the excitation current to the first radiator 12 through the feeding point, so that the first radiator 12 can radiate the 5G signal of the first frequency band. Signal. The first radiator 12 and the second radiator 14 are both used to support the second frequency band of the 5G signal. In the embodiment of the present application, the second radiator 14 is a parasitic branch of the first radiator 12. When the first radiator 12 radiates the signal of the second frequency band, the radiation energy is coupled to the second radiator 14 via the gap 16, so that the second radiator 14 can radiate the 5G signal of the second frequency band. The center frequency of the second frequency band is within the frequency band range of the first frequency band. Therefore, when the first radiator 12 radiates the signal of the second frequency band, the second radiator 14 can generate resonance about the second frequency band, and the two can jointly radiate the signal of at least part of the frequency band (that is, the signal of the second frequency band), so that the current corresponding to the second frequency band on the first radiator 12 is shunted by the second radiator 14, which can improve the current distribution of the first radiator 12, and then can improve the current concentration of the antenna device 100 when supporting 5G signals to a certain extent, and effectively reduce the overall SAR value of the antenna device 100.

In this embodiment, the second frequency band supported by the second radiator 14 may be substantially the same as the first frequency band, that is, the first radiator 12 and the second radiator 14 may be used to send or/and receive 5G signals in substantially the same working frequency band, so that the second radiator 14 can disperse the current distribution corresponding to the first frequency band on the first radiator 12. Specifically, the excitation current from the feed source 30 is shunted by the first radiator 12 and the second radiator 14, so that the current peak on the first radiator 12 can be reduced and its electric field distribution can be optimized, thereby facilitating the reduction of the SAR value of the antenna device 100. It should be understood that at this time, the number of working frequency bands of 5G signals supported by the first radiator 12 and the second radiator 14 may be one or more. For example, the second frequency band is the same as the first frequency band, and both may be in the frequency band range of 2.496GHz-2.69GHz and the frequency band range of 3.3GHz-3.80GHz, which covers the frequency band range of N41 and N78 frequency bands. Then, the first radiator 12 and the second radiator 14 can both support signals with working frequency bands of N41 and N78 frequency bands.

In some embodiments, the first frequency band and the second frequency band may both be high frequency bands, but the ranges of the two may not be exactly the same. For example, the first frequency band and the second frequency band may include at least one of the above-mentioned N41 and N78 frequency bands, or the center frequency of the first frequency band (or the center frequency of at least one sub-band of the first frequency band) and the center frequency of the second frequency band (or the center frequency of at least one sub-band of the second frequency band) are both within the frequency band range of 2.496 GHz-3.80 GHz. When the first frequency band supported by the first radiator 12 is a high frequency band, the center frequency of the second frequency band may be within the frequency band range of the first frequency band, for example, the center frequency of the second frequency band may also be within the range of the high frequency band.

It should be understood that the first frequency band mentioned in the present application should not be strictly limited to the high frequency band. For example, the first frequency band can cover the high frequency band, or the center frequency of the first frequency band is within the frequency band of the high frequency band, or the first frequency band and the high frequency band have overlapping frequency bands, which means that the upper limit of the frequency band of the first frequency band can be slightly offset relative to the upper limit of the high frequency band (such as the upper limit of the frequency band of the first frequency band can be slightly greater than or less than the upper limit of the high frequency band), and the lower limit of the frequency band of the first frequency band can be slightly offset relative to the lower limit of the high frequency band (such as the lower limit of the frequency band of the first frequency band can be slightly greater than or less than the lower limit of the high frequency band). Based on this, "the center frequency of the second frequency band is within the frequency band of the first frequency band" can exist in the following multiple situations: the center frequency of the second frequency band is within the high frequency band; or the center frequency of the second frequency band is within the first frequency band but not within the high frequency band. In these cases, when the first radiator 12 radiates signals in the first frequency band, the second radiator 14 can generate resonance about the first frequency band, and the two can jointly radiate signals of at least part of the frequency band (that is, signals of the first frequency band), and the second radiator 14 can also shunt the current of the first radiator 12.

In some embodiments, the second frequency band may be a sub-band of the first frequency band, that is, the first frequency band covers the second frequency band. At this time, the number of operating frequency bands of 5G signals supported by the first radiator 12 is greater than the number of operating frequency bands of 5G signals supported by the second radiator 14. The number of operating frequency bands of signals supported by the second radiator 14 is one or more, and the operating frequency band of signals supported by the first radiator 12 includes the operating frequency band of signals supported by the second radiator 14. For example, the center frequency of the second frequency band falls within the frequency band range of 3.30 GHz-3.80 GHz, which covers the frequency range of the N78 frequency band. The center frequency of the first frequency band falls within the frequency band range of 3.30 GHz-3.80 GHz or/and falls within the frequency band range of 2.496 GHz-2.690 GHz, which covers the frequency range of the N78 frequency band or/and the N41 frequency band, and basically covers the frequency band range of the second frequency band.

Further, in order to support the above-mentioned first frequency band and second frequency band, the first radiator 12 and the second radiator 14 are configured to operate in corresponding resonant modes. For example, the first radiator 12 can operate in a first resonant mode, and the first resonant mode indicates that the first radiator 12 generates resonance in the first frequency band. Specifically, the first radiator 12 has a first free end 1211 away from the second radiator 14, and the portion of the first radiator 12 from the feeding point 127 to the first free end 1211 forms a first current path, and the low-order mode of the first current path is used to form a first resonant mode to radiate the signal of the first frequency band. For example, the first radiator 12 has a suitable equivalent electrical length, so that the first current path can form a resonance of a 1/4 wavelength mode of the first frequency band (that is, a first resonant mode), and the first frequency band here can be a high frequency band.

The portion of the first radiator 12 from the feeding point 127 to the slot 16 and the second radiator 14 together form a second current path, and the balanced mode or high-order mode of the second current path is used to form a second resonant mode, and the second resonant mode characterizes the resonance of the first radiator 12, the slot 16 and the second radiator 14 in the second frequency band. For example, the first radiator 12, the slot 16 and the second radiator 14 have a suitable equivalent electrical length, so that the second current path can form a resonance of a 1/2 wavelength ring mode of the second frequency band, or a resonance of a 3/4 wavelength mode of the second frequency band, or a resonance of a 5/8 wavelength mode of the second frequency band, or a resonance of a 5/4 wavelength mode of the second frequency band (that is, a second resonant mode), and the second frequency band here can be a high frequency band. Therefore, when the first frequency band and the second frequency band are substantially the same, the antenna body 10 can use different resonant modes to cover the first frequency band, and the current corresponding to the first frequency band is dispersed, which is conducive to reducing the SAR value.

In an embodiment of the present application, the signal radiated by the antenna body 10 may also include a Long Term Evolution (LTE) signal. The working frequency band of the signal radiated by the antenna body 10 may include at least one frequency band of LTE, such as a low frequency band (LB band), and the sub-bands of the LB band may include: B5 band (0.824GHz-0.894GHz), B8 band (0.88GHz-0.96GHz), B20 band (0.791GHz-0.862GHz), and B28 band (0.703GHz-0.803GHz); for example, a medium frequency band (MB band), and the sub-bands of the MB band may include: B1 band (1.92GHz-2.17GHz), B3 band (1.71GHz-1.88GHz), and B2 band (1.85GHz-1.99GHz); for example, a high frequency band (HB band), and the sub-bands of the HB band may include: B40 band (2.30GHz-2.40GHz), B41 band (2.496GHz-2.690GHz), and the like. Therefore, the antenna device 100 provided in this embodiment can simultaneously support the fourth generation mobile communication technology (4th Generation Mobile Communication Technology, 4G) signal and the 5G signal, and the SAR value of the radiated 5G signal is relatively low, which can solve the problem of high SAR value corresponding to the 5G signal in related technologies.

Specifically in the present embodiment, the first radiator 12 is also used to support the third frequency band of the LTE signal, and the second radiator 14 is also used to support the fourth frequency band of the LTE signal, and the third frequency band is different from the fourth frequency band. 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 can be completely different (such as there is no intersection between the two), and for another example, the frequency ranges of the two frequency bands can 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 the other frequency band). In some embodiments, the center frequency of the third frequency band is higher than the center frequency of the fourth frequency band. For example, the center frequency of the sub-bands of the third frequency band can all be higher than the center frequency of the sub-bands of the fourth frequency band. As an example, the third frequency band may be a high frequency band, or the center frequency of the third frequency band falls within the frequency band range of 2.30 GHz-3.690 GHz, for example, the center frequency of the sub-band of the third frequency band falls within the frequency band range of 2.30 GHz-2.40 GHz (B40 band) or/and falls within the frequency band range of 2.496 GHz-2.690 GHz (B41 band); the fourth frequency band may be a medium frequency band, or the center frequency of the fourth frequency band falls within the frequency band range of 1.71 GHz-2.17 GHz, for example, the center frequency of the sub-band of the fourth frequency band may fall within the frequency band range of 1.92 GHz-2.17 GHz (B1 band) or/and fall within the frequency band range of 1.71 GHz-1.88 GHz (B3 band). In short, in some embodiments, the antenna body 10 including the first radiator 12 and the second radiator 14 is used to support the medium frequency band and the high frequency band (MHB) of the LTE signal.

Please refer to FIG. 2 . In this embodiment, the feeding point 127 is disposed at a position on the first radiator 12 that is relatively far from the second radiator 14. Since the first free end 1211 is the end position on the first radiator 12 that is far from the second radiator 14, the distance between the feeding point 127 and the slot 16 is greater than the distance between the feeding point 127 and the first free end 1211. Therefore, the side of the first radiator 12 that is close to the second radiator 14 can form the long arm of the IFA antenna, and the other side can form the short arm of the IFA antenna, so that the first radiator 12 or the antenna body 10 has more radiation modes, which is beneficial for the antenna device 100 to cover more frequency bands, and the working frequency band of the antenna device 100 is wider. Furthermore, since there is a strong current point at or near the feeding point 127, the feeding point 127 of this embodiment is relatively far from the second radiator 14, and the strong current point on the first radiator 12 can be relatively far from the strong current point on the second radiator 14, so that the electric field distribution on the antenna body 10 is relatively more dispersed, which is beneficial to reduce the overall SAR value of the antenna body 100. It should be understood that a certain element referred to in the embodiments of the present application includes an "end" portion, and the "end" portion can be understood as a portion occupying a certain physical space, and the "end" portion is located in the end area of the element to which it belongs. For example, the "end" portion can be a part of the entity at the extended end of the element. For example, the "end" portion has a certain extension size, and its extension size may not be greater than one half of the overall extension size of the element; for another example, the "end" portion can also be a structure such as an end face or end line at the extended end of the element.

The first grounding point 128 is also disposed on the first radiator 12 at a position relatively far from the second radiator 14, so that the distance between the first grounding point 128 and the slot 16 is greater than the distance between the first grounding point 128 and the first free end 1211. Furthermore, the distance between the first grounding point 128 and the slot 16 is greater than or equal to the distance between the feeding point 127 and the slot 16, so that the first grounding point 128 is close to the feeding point 127. The first grounding point 128 is set or located between the feeding point 127 and the first free end 1211. In some embodiments, the first grounding point 128 can be set on the first radiator 12 at an interval from the feeding point 127, but the distance between the two is limited to a specified distance, for example, the distance between the first grounding point 128 and the feeding point 127 should be less than or equal to 5 mm, so as to ensure that the inductance introduced by the first grounding point 128 to the first radiator 12 is small, so that the impedance matching performance of the first radiator 12 is better. In some embodiments, the potential of the first grounding point 128 can be the same as the potential of the feeding point 127, for example, the first grounding point 128 can be the same point as the feeding point 127, so that the inductance introduced by the first grounding point 128 is small, so that the impedance matching performance of the first radiator 12 is better. The specific grounding form of the first grounding point 128 can be achieved by structures such as grounding springs, and the specific structural form of the feeding point 127 can also be achieved by structures such as feeding springs, which are not limited in this application.

The second radiator 14 is provided with a second grounding point 147, and the second grounding point 147 is located at a portion of the second radiator 14 relatively far from the first radiator 12. Specifically, the second radiator 14 has a second free end 1411 far from the first radiator 12, and the distance between the second grounding point 147 and the gap 16 is greater than the distance between the second grounding point 147 and the second free end 1411.

Furthermore, in this embodiment, in order to ensure that the antenna body 10 can support the first frequency band, the second frequency band, the third frequency band and the fourth frequency band, the antenna device 100 may also include a tuning circuit 50, one end of the tuning circuit 50 is grounded, and the other end is connected to the antenna body 10, and the tuning circuit 50 is used to adjust the frequency deviation of the antenna device 100. The tuning circuit 50 can also be configured to use different impedance elements to be connected to the loop of the antenna body 10, so that the antenna body 10 can switchably radiate radio frequency signals of different frequency bands.

The tuning circuit 50 can be connected to the first radiator 12 or the second radiator 14. Specifically, in the embodiment shown in FIG2 , the second grounding point 147 of the second radiator 14 is grounded through the tuning circuit 50. The tuning circuit 50 includes a switch module 52 and at least two tuning branches 54, the at least two tuning branches 54 are connected in parallel, and the switch module 52 is connected to the at least two tuning branches 54. The tuning circuit 50 is configured to selectively connect at least one of the at least two tuning branches 54 to the loop of the second radiator 14 through the switch module 52, so that the second radiator 14 can switchably radiate signals of the second frequency band or the fourth frequency band, or sub-frequency bands of these frequency bands based on the excitation current.

In some embodiments, at least two tuning branches 54 include a first branch 541 and a second branch 543, one end of the first branch 541 is grounded and the other end is connected to the second radiator 14, and the second 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, so as to change the impedance of the loop when connected to the loop of the second radiator 14, so as to adjust the second radiator 14 to a suitable impedance matching to radiate the signal of the required 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, and both are controlled by the switch module 52. The switch module 52 selectively connects the first capacitor C1 or/and the first inductor L1 to the loop of the second radiator 14. The capacitance value of the first capacitor C1 and the inductance of the first inductor L1 can be set according to the specific working frequency band of the second radiator 14, and the embodiment of the present application is not limited to this.

Please refer to FIG. 3. In some embodiments, at least two tuning branches 54 further 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 second radiator 14. The fourth branch 547 is connected in parallel with the third branch 545. Further, the fourth branch 547, the third branch 545, and 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 second radiator 14, so as to adjust the second radiator 14 to a suitable impedance match to radiate the signal of the required frequency band. In some embodiments, the third branch 545 includes a second inductor L2, and the fourth branch 547 includes a 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 are all 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 to the loop of the second radiator 14 to obtain a signal of a required frequency band. 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 second radiator 14, and the embodiment of the present application is not limited to this.

In the present embodiment, the switch module 52 is connected to the tuning branch 54, and is used to control the on-off of the grounding path of the radiator 10 through each tuning branch 54. The switch module 52 can be connected between the tuning branch 54 and the second radiator 14, or can be connected between the tuning branch 54 and the reference ground terminal. In the present embodiment, the switch module 52 includes at least two switches, and the at least two switches are arranged in a one-to-one correspondence with the at least two tuning branches 54, and each switch is connected to a corresponding tuning branch 54 to control the on-off of the grounding path of the antenna body 10 through the first grounding point 128 and the corresponding tuning branch 54. In the present embodiment, each switch can be a single-pole single-throw switch or an electronic switch tube, etc. Among them, the electronic switch tube can be a MOS tube, a transistor, etc. In the embodiment of the present application, the switch module 52 is The specific components are not further limited, as long as they meet the on-off control conditions of the grounding paths corresponding to the multiple tuning branches 54.

The above-mentioned antenna device 100 equips the antenna body 10 with a tuning circuit 50, and connects at least one of the at least two tuning branches 54 to the loop of the second radiator 14 via the switch module 52. It is possible to adjust the impedance matching of the second radiator 14 with the help of different tuning branches 54, so that the second radiator 14 can operate in different frequency bands, such as multiple sub-bands of the second frequency band or the fourth frequency band, thereby broadening the operating frequency band of the second radiator 14 and achieving higher stability in frequency modulation.

This embodiment does not limit the specific coupling and feeding form between the first radiator 12 and the second radiator 14. For example, as an example, in the embodiment shown in FIG3 , the first radiator 12 can couple and feed the second radiator 14 in the form of slot coupling, and in this case, the slot 16 between the first radiator 12 and the second radiator 14 can be used as a coupling slot; as another example, the first radiator 12 can couple and feed the second radiator 14 by configuring a dedicated connection end as a dedicated coupling part, and the slot 16 between the first radiator 12 and the second radiator 14 is the gap between the dedicated coupling part and the second radiator 14. Further, it should be understood that the specific defined form of the gap 16 is not limited, and it should be understood as a space defined by the boundary structure of the relative parts of the first radiator 12 and the second radiator 14 spaced apart from each other. For example, when the ends of the first radiator 12 and the second radiator 14 are opposite to each other, the specific form of the gap 16 can be the gap between the ends of the first radiator 12 and the second radiator 14; for example, when the sides of the first radiator 12 and the second radiator 14 are opposite to each other (such as the two are roughly parallel), the specific form of the gap 16 can be the gap between the side edges of the first radiator 12 and the second radiator 14. For the sake of simplicity, the antenna body 10 (including the second radiator 14 and the first radiator 12, etc.) in the drawings of this specification is represented as a simple geometric shape (such as a strip), however, it is understandable that the various parts of the antenna body 10 may actually have a certain width; similarly, the various parts of the antenna body 10 are presented as a relatively flat structure in the figure, however, in practice, in order to avoid parts such as the microphone hole, headphone jack, and receiver hole of an electronic device, the various parts of the antenna body 10 may have certain bends or holes, notches and other features, and the actual specific form of the antenna body 10 should not be limited to the drawings provided in the embodiments of the present application.

Please refer to FIG. 4 . In this embodiment, the first radiator 12 includes a first main body 121 and a first coupling portion 123. The first main body 121 is substantially in the shape of an extended strip. The first free end 1211 is located at one end of the first main body 121. The first coupling portion 123 is connected to one end of the first main body 121 away from the first free end 1211. The first coupling portion 123 may have a certain extension length, and may be continuous with the first main body 121. The first coupling portion 123 and the first main body 121 together form a substantially straight strip-shaped whole, which extends substantially along the first direction X. The first coupling portion 123 and the second radiator 14 are relatively spaced in the first direction X to couple the radiation energy to the second radiator 14. The length of the first coupling portion 123 is the length of the coupling region between the first radiator 12 and the second radiator 14. The length of the first coupling portion 123 can be considered as the length dimension of the first coupling portion 123 along the first direction X. It has been verified in practice that when the length dimension is not less than 3 mm, the normal current excitation effect between the first radiator 12 and the second radiator 14 can be guaranteed. Furthermore, if the distance between the first coupling portion 123 and the second radiator 14 is too large, the current may not be transmitted normally. If the distance is too small, no current excitation effect may be generated. Therefore, the distance range (that is, the width of the gap 16) can be 0.8mm~3mm, which can 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 feeding to reduce the SAR value of the antenna device 100.

In this embodiment, the first coupling portion 123 is connected to one end of the first main body 121 close to the second radiator 14, and the first coupling portion 123 is spaced apart from the second radiator 14 to couple and feed the second radiator 14. In the embodiment, the width dimension D1 of the first coupling portion 123 along the second direction Y is greater than the width dimension D2 of the first main body 121 along the second direction Y. Among them, the second direction Y intersects with the first direction X, and the angle between the two can be greater than or equal to 45 degrees. In this embodiment, the second direction Y and the first direction X can be perpendicular to each other. From a structural point of view, the width of the first coupling portion 123 is wider than the width of the first main body 121, which can make the coupling area between the first coupling portion 123 and the second radiator 14 relatively large, and the energy coupling efficiency is high, which is conducive to dispersing the current to achieve a lower SAR value.

At least a portion of the structure of the first coupling portion 123 and the second radiator 14 may be overlapped to achieve coupling and feeding of the second radiator 14. It should be understood that in the embodiment of the present application, the "overlapping arrangement" of two components means that the projections of the two in the same direction have overlapping parts. For example, the first coupling portion 123 and at least a portion of the structure of the second radiator 14 are overlapped, that is, the projections of the first coupling portion 123 and at least a portion of the second radiator 14 in one direction have overlapping parts, such as the projections of the first coupling portion 123 and the second radiator 14 along the first direction X have overlapping parts. Or/and, the projections of the first coupling portion 123 and the second radiator 14 along the second direction Y may also have overlapping parts.

Specifically in this embodiment, the first coupling portion 123 and the first main body portion 121 are arranged in parallel substantially along the first direction X, the first coupling portion 123 and at least a portion of the second radiator 14 are arranged in parallel and spaced apart in the first direction X (such as the two can extend substantially along the same direction), and the above-mentioned gap 16 is formed between the first coupling portion 123 and the second radiator 14. To ensure the efficiency of energy coupling, the width of the gap 16 can be greater than or equal to 0.8 mm and less than or equal to 3 mm, for example, the width of the gap 16 can be 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, etc.

The second radiator 14 includes a second main body 141 and a second coupling portion 143. The second main body 141 is generally in the shape of an extended strip, and is sequentially extended along the first direction X with the first main body 121. The second free end 1411 is located at one end of the second main body 141, for example, at an end of the second main body 141 away from the gap 16. The second coupling portion 143 is connected to an end of the second main body 141 away from the second free end 1411 and close to the gap 16. The second coupling portion 143 may have a certain extension length, and may be continuous with the second main body 141. The second coupling portion 143 and the second main body 141 together form a generally straight strip-shaped whole, which extends generally along the first direction X. The second coupling portion 143 and the first coupling portion 123 are arranged relatively spaced apart in the first direction X, and the gap 16 is formed between the second coupling portion 143 and the first coupling portion 123. The width dimension D3 of the second coupling portion 143 along the second direction Y is greater than the width dimension D4 of the second main body portion 141 along the second direction Y. Therefore, structurally, the width of the second coupling portion 143 is wider than the width of the second main body portion 141, which can make the coupling area between the second coupling portion 143 and the first coupling portion 123 relatively large, the coupling capacitance is large, the energy coupling efficiency is high, and it is beneficial to disperse the current to achieve a lower SAR value.

Furthermore, the second coupling portion 143 and the first coupling portion 123 are nested, so that the length of the gap 16 formed between the two is longer, which is conducive to increasing the coupling area. In this embodiment, the first coupling portion 123 includes at least one protruding portion, and the first coupling portion 123 is provided with at least one matching groove, the second coupling portion 143 includes at least one matching portion, and the second coupling portion 143 is provided with at least one receiving groove, the protruding portion is embedded in the receiving groove, and the matching portion is embedded in the matching groove, thereby forming a nested structure between the second coupling portion 143 and the first coupling portion 123.

Specifically in this embodiment, the first coupling portion 123 may include a first protruding portion 1231, a second protruding portion 1233, and a third protruding portion 1235. The first protruding portion 1231 is connected to the end of the first main body 121 and protrudes relative to the first main body 121 along the first direction X. The second protruding portion 1233 is connected to the end of the first main body 121 and protrudes relative to the first main body 121 along the first direction X. The second protruding portion 1233 and the first protruding portion 1231 are arranged substantially parallel and spaced apart. For example, the second protruding portion 1233 and the first protruding portion 1231 are arranged parallel and spaced apart along the second direction Y, so that a first matching groove 1232 is formed between the second protruding portion 1233 and the first protruding portion 1231. The third protruding portion 1235 is connected to the end of the first main body 121 and protrudes relative to the first main body 121 along the second direction Y, so that the size of the first coupling portion 123 as a whole in the second direction Y is greater than the size of the first main body 121 in the second direction Y. Furthermore, the dimension of the third protrusion 1235 in the first direction X is smaller than the dimension of the second protrusion 1233 in the first direction X, that is, the second protrusion 1233 is more protruding toward the second radiation portion 14 relative to the third protrusion 1235, and a step-like structure is formed between the second protrusion 1233 and the third protrusion 1235, and the two together define the second mating groove 1234.

The second coupling portion 143 may include a first matching portion 1431 and a second matching portion 1433. The first matching portion 1431 is connected to the end of the second main body portion 141 and protrudes relative to the second main body portion 141 along the first direction X, and the first matching portion 1431 is at least partially embedded in the first matching groove 1432. A step-like structure is formed between the first matching portion 1431 and the end of the first main body portion 141, and the two together define the first receiving groove 1432, and the first protruding portion 1231 is at least partially embedded in the first receiving groove 1432. The second matching portion 1433 is connected to the end of the second main body portion 141 and protrudes relative to the second main body portion 141 along the first direction X, and the second matching portion 1433 is at least partially accommodated in the second matching groove 1434. The second matching portion 1433 and the first matching portion 1431 are arranged approximately in parallel and spaced apart. For example, the second matching portion 1433 and the first matching portion 1431 are arranged in parallel and spaced apart along the second direction Y, so that a second receiving groove 1434 is formed between the second matching portion 1433 and the first matching portion 1431, and the second protrusion 1433 is at least partially accommodated in the second receiving groove 1434.

Furthermore, in this embodiment, the first radiator 12 may further include a first extension portion 125, which is connected to the first main body portion 121 and extends along the second direction Y. For example, the first extension portion 125 protrudes relative to the first main body portion 121 along the second direction Y. The feeding point 127 and the first grounding point 128 may be arranged at the first extension portion 125, so that the current strong points at the feeding point 127 (or near the feeding point 127) and the first grounding point 128 (or near the first grounding point 128) are relatively farther away from the first main body portion 121, that is, relatively farther away from the main structure of the first radiator 12, which is conducive to dispersing the current on the first radiator 12. Furthermore, by providing the first extension portion 125, the inductance introduced from the feeding point 127 or/and the first grounding point 127 can be adjusted, which is also conducive to tuning the frequency band.

In this embodiment, the second radiator 14 may further include a second extension portion 145, which is connected to the second main body portion 141 and extends along the second direction Y. For example, the second extension portion 145 protrudes relative to the second main body portion 141 along the second direction Y. The location 147 can be arranged at the second extension portion 145, so that the current strong point at the feeding point 127 (or near the feeding point 127) and the second grounding point 147 (or near the second grounding point 147) is relatively farther away from the second main body 141, that is, relatively farther away from the main structure of the second radiation portion 14, which is conducive to dispersing the current on the second radiation body 14. Furthermore, by providing the second extension portion 145, the inductance introduced from the second grounding point 147 can be adjusted, which is also conducive to tuning the frequency band.

Please refer to FIG. 5. In some embodiments of the present application, the antenna body 10 provided in the embodiment of the present application may be in the form of the frame antenna shown in FIG. 5. It can be seen that the antenna body 10 may be in the form of an irregular, curved structure with a notch, which is beneficial for avoiding parts such as the microphone hole, headphone jack, and receiver hole of an electronic device. Although the specific form of the antenna body 10 shown in this embodiment is different from the form of the antenna body 10 in the figure of the previous embodiment, it should be understood that the components, extensions, and directions of the antenna body 10 in this embodiment all cover the features of the antenna body 10 in the figure of the previous embodiment, and the specific structure of the antenna body 10 shown in FIG. 5 should not be understood as a limitation to this solution.

Please refer to Figures 6, 7 and 8. Figure 6 shows a schematic diagram of the S parameters of the antenna device 100 of the embodiment shown in Figure 5, and Figure 7 shows a schematic diagram of the simulation of the radiation efficiency of the antenna device 100 of the embodiment shown in Figure 5. It can be seen from the figure that the antenna device 100 can support multiple frequency bands of LTE signals in multiple resonant modes, and all have high radiation efficiency. Figure 8 shows a schematic diagram of the actual test of the radiation efficiency of the antenna device 100 shown in Figure 5. It can be seen from the figure that in the actual test diagram, the efficiency trend of the antenna device 100 is basically corresponding to the efficiency trend in the simulation test in Figure 7, so the antenna device 100 provided in this embodiment has a high radiation efficiency.

Please refer to Figure 9, which shows a schematic diagram of device loss simulation when the antenna device 100 shown in Figure 5 switches the frequency band through the tuning circuit 50. It can be seen that the performance loss is small when the switch of this scheme is switched, and the scheme of connecting the tuning circuit 50 to the second radiator 14, when switching the MHB frequency band through the tuning circuit 50, has little impact on the radiation performance of the antenna device 100.

Please refer to Figure 10, which shows a schematic diagram of the electric field distribution of the antenna device 100 of the embodiment shown in Figure 5 when supporting LTE signals. (A), (B), and (C) in Figure 10 respectively represent the electric field distribution radiated when the resonant frequency of the antenna device 100 is in the B1 frequency band, the B3 frequency band, and the B41 frequency band. It can be seen from the figure that under the harsh environment of the current antenna device 100 (in the test, the antenna device 100 is used in an electronic device with a small clearance area around it, for example, the antenna device 100 is metal directly below and around it), the performance of the antenna device 100 is still good.

Please refer to Figures 11 and 12. Figure 11 shows a grayscale schematic diagram of the electric field distribution of the antenna device 100 of the embodiment shown in Figure 5 when supporting 5G signals, which represents the electric field distribution radiated when the resonant frequency of the antenna device 100 is in the N78 frequency band; Figure 12 shows a schematic diagram of the SAR hotspot distribution when the resonant frequency of the antenna device 100 is in the N78 frequency band. As can be seen from Figure 11, when the antenna device 100 radiates the signal in the N78 frequency band, the electric field strength point is divided into two parts, one of which is the 1/4 wavelength resonance mode generated by the first current path of the first radiator 12, and the other is the 1/2 wavelength ring mode resonance generated by the second current path formed by the coupling of the branch first radiator 12 and the second radiator 14. When the antenna device 100 radiates the signal in the N78 frequency band, the position of the electric field strength point also corresponds to the SAR hotspot distribution in Figure 12, wherein there is no longer an extremely strong single current point on the antenna body 10, but it is dispersed into two secondary current points, and the single point peak value of the current is reduced. Furthermore, as shown in Table 1 below, the SAR value corresponds to the corresponding active performance total radiated power (Total Radiation Power, TRP). When the TRP is 21dBm, the test shows that the SAR value is still lower than 1.0W/kg, indicating that the SAR value corresponding to the N78 frequency band is at a relatively good level.

Table 1

Therefore, the antenna device 100 provided in the embodiment of the present application includes a first radiator 12 and a second radiator 14. The radiator 14 is spaced apart from the first radiator 12, and the first radiator 12 is configured to receive an excitation current via a feeding point 127 to radiate a signal in a second frequency band. When the first radiator 12 operates in the second frequency band, the first radiator 12 can couple and feed the second radiator 14, so that the second radiator 14 and the first radiator 12 work together in the second frequency band. Since the center frequency point of the second frequency band is within the frequency band range of the first frequency band, the two can jointly radiate at least part of the signal in the first frequency band, or it is considered that the two jointly radiate the signal in the second frequency band. At this time, the excitation current input through the feeding point 127 is shunted by the first radiator 12 and the second radiator 14, which can improve the current concentration condition of the antenna device 100 to a certain extent, thereby reducing the current peak of the second radiator 14, so that the SAR value of the antenna device 100 meets the specified requirements.

13 , the present embodiment further provides an electronic device 200 , which may be, but not limited to, a mobile phone, a tablet computer, a smart watch, etc. The electronic device 200 of this embodiment is described by taking a mobile phone as an example.

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

In some embodiments, 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 may be a liquid crystal display panel (LCD), and in some embodiments, the display panel may also be a touch display screen.

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

Please refer to FIG. 14 . The middle frame 1011 may be an integrally formed structure, which can be structurally divided into a bearing portion 1012 and a frame 1013 surrounding the bearing portion 1012. It should be understood that the "bearing portion 1012" and the "frame 1013" are only named for the convenience of description. The structure filled with oblique lines in the figure is only for identification and does not represent the actual structure of the two. There may be no obvious dividing line between the two, or two or more parts may be assembled together. The naming of "bearing portion 1012" and "frame 1013" should not limit the structure of the middle frame 1011. The bearing portion 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. The frame 1013 is connected to the periphery of the bearing portion 1012. Further, the frame 1013 is arranged around the periphery of the bearing portion 1012, and protrudes relative to the surface of the bearing 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 housing 1010 and the display screen 1003 together form the appearance surface of the electronic device 200 .

In this embodiment, the antenna device 1004 may be any antenna device 100 provided in the above embodiments, or may have a combination of any one or more features of the above antenna devices 100. The relevant features may refer to the above embodiments and will not be described in detail in this embodiment.

In some embodiments, the antenna device 1004 is integrated into the housing 1001. For example, the antenna device 100 can be disposed in the middle frame 1011 or in the rear housing 1010. This specification does not limit this. Similar to the aforementioned antenna device 100, the antenna device 100 of this embodiment may include a first radiator 12 and a second radiator 14. The first radiator 12 and the second radiator 14 may be disposed in the middle frame 1011 (for example, integrated in the mounting portion 1012 or the frame 1013) or the rear housing 1010.

Further, in the embodiment shown in FIG. 14 , the frame 1013 is at least partially made of metal, for example, the material of the frame 1013 may include aluminum alloy, magnesium alloy, etc. The antenna device 1004 is integrated in the frame 1013, which can also be understood as using the structure of the frame 1013 itself to form the radiation branch of the antenna body 10. In this embodiment, the frame 1013 is provided with a gap 1014, which is connected to the outside and divides the frame 1013 into at least two parts, and the antenna device 1004 is integrated in at least two parts of the frame 1013, and the gap 1014 is the gap 16 in the above embodiment. In this way, using the metal frame 1013 as a part of the radiator of the antenna device 1004 is conducive to saving space in the electronic device 400, and also provides a larger clearance area for the antenna device 1004, which is conducive to ensuring a higher radiation efficiency. A non-shielding body (not shown in the figure) may be provided in the gap 1014. The non-shielding body is made of non-metal (such as resin, etc.) and has the property of passing electromagnetic wave signals to allow the antenna device 1004 to transmit signals. The outer surface of the non-shielding body is flush with the outer surface of the frame 1013 to ensure the integrity of the appearance of the electronic device 200.

Furthermore, the antenna body 10 (the first radiator 12 and the second radiator 14) can be any one of a flexible circuit board radiator, a laser direct forming radiator, a printed direct forming radiator, a metal branch (such as a metal insert on a structure), and a metal frame antenna body. For example, the antenna body 10 (the first radiator 12 and the second radiator 14) can also be a metal branch, which can be directly attached to the surface of the frame 1013. For another example, the frame 1013 can be made of non-metal, and the antenna device 100 can be integrated into the frame 1013. For example, the frame 1013 can be made of materials such as plastics and resins, and the materials of the frame 1013 include plastics/plastics/resins, etc. For example, the material of the frame 1013 may include engineering plastics such as polycarbonate (PC) or/and acrylonitrile-butadiene-styrene copolymer (ABS), or may include composite materials, such as engineering plastics with added high-performance fibers (carbon fiber or/and glass fiber or/and Kevlar fiber). In such an embodiment, the antenna body 10 of the antenna device 100 (such as the first radiator 12 or/and the second radiator 14) can be a flexible circuit board radiator, which can be integrated into the frame 1013 by insert molding (such as the first radiator 12 or/and the second radiator 14 of the antenna body 10 is integrally embedded in the frame 1013), or integrated into the frame 1013 by attachment (such as the first radiator 12 or/and the second radiator 14 of the antenna body 10 is attached to the surface of the frame 1013).

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 carrier 1012, so that the top frame 1017 and the bottom frame 1019 are substantially opposite to each other. The above-mentioned antenna body 10 can be integrated into at least one of the top frame 1017 and the bottom frame 1019. In 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 antenna body 10 can be integrated into at least one of the top frame 1017 and the bottom frame 1019, the antenna device 1004 serves as the top antenna or/and the bottom antenna of the electronic device 200, and the SAR value generated is lower, which is more beneficial to human health. It should be understood that the above-mentioned "top" and "bottom" are based on the normal usage state of the electronic device 200. For example, when the electronic device 200 is placed vertically in the length direction and the display screen 1003 faces the user, the end of the electronic device farther from the ground is considered to be the "bottom" and the other end is considered to be the "top".

In the antenna device and electronic device provided in the embodiment of the present application, the antenna device includes a first radiator and a second radiator, the first radiator is provided with a feeding point and a first grounding point, and the feeding point is used to connect the feed source; the first radiator is set to be able to support the first frequency band of the fifth generation mobile communication technology (5th Generation Mobile Communication Technology, 5G) signal, and the second radiator supports the second frequency band of the 5G signal, and the center frequency of the second frequency band is within the frequency band range of the first frequency band, so that when the first radiator radiates the signal of the first frequency band, the second radiator simultaneously generates resonance about the second frequency band, and the resonance is basically close to the first frequency band, so that the two can jointly radiate the signal of at least part of the frequency band (that is, the signal of the first frequency band), so that the current corresponding to the first frequency band on the first radiator is shunted by the second radiator, which can improve the current distribution of the first radiator, so that the current concentration of the antenna device as a whole when supporting 5G signals can be improved to a certain extent, thereby effectively reducing the overall SAR value of the antenna device. Therefore, the antenna device provided in the embodiment of the present application has a lower SAR value when supporting 5G signals.

It should be noted that, in the specification 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 a central component at the same time (that is, the two are indirectly connected). In the description of this specification, the description of reference terms "one embodiment", "some embodiments" or "other embodiments" etc. means that the specific features, structures, materials or specifics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or specifics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the features of different embodiments or examples described in this specification without contradicting each other.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (22)

1. An antenna device, comprising:

   a first radiator, wherein the first radiator is provided with a feeding point and a first grounding point, the feeding point being used to connect a feed source; the first radiator is used to support a first frequency band and a second frequency band of a fifth generation mobile communication technology (5th Generation Mobile Communication Technology, 5G) signal;

   The second radiator is spaced apart from the first radiator, and the second radiator is provided with a second grounding point; a gap is provided between the second radiator and the first radiator, and when the first radiator radiates the signal of the second frequency band, the radiation energy is coupled to the second radiator through the gap, so that the second radiator can support the second frequency band together with the first radiator, and the center frequency of the second frequency band is within the frequency band range of the first frequency band.
2. The antenna device according to claim 1, wherein the first radiator has a first free end away from the second radiator, and the distance between the feeding point and the slot is greater than the distance between the feeding point and the first free end.
3. The antenna device according to claim 1 or 2, wherein the distance between the first ground point and the slot is greater than or equal to the distance between the feed point and the slot.
4. The antenna device according to any one of claims 1 to 3, wherein the potential of the feeding point is the same as that of the first grounding point, or the feeding point and the first grounding point are the same point.
5. The antenna device according to any one of claims 1 to 4, wherein the second radiator has a second free end away from the first radiator, and the distance between the second grounding point and the gap is greater than the distance between the second grounding point and the second free end.
6. The antenna device according to any one of claims 1 to 5, wherein the first radiator includes a first main body portion and a first coupling portion connected to the first main body portion, the second radiator includes a second main body portion and a second coupling portion connected to the second main body portion, the first coupling portion and the second coupling portion are nested, and the gap is arranged between the first coupling portion and the second coupling portion.
7. The antenna device as described in claim 6, wherein the first coupling portion includes at least one protrusion, and the first coupling portion is provided with at least one mating groove; the second coupling portion includes at least one mating portion, and the second coupling portion is provided with at least one accommodating groove; the protrusion is embedded in the accommodating groove, and the mating portion is embedded in the mating groove.
8. The antenna device as described in claim 6 or 7, wherein the first main body portion and the second main body portion are extended in sequence along the first direction, the first radiator also includes a first extension portion, the first extension portion is connected to the first main body portion and protrudes along the second direction relative to the first main body portion, the second direction intersects with the first direction, the feeding point and the first grounding point are arranged on the first extension portion; the second radiator also includes a second extension portion, the second extension portion is connected to the second main body portion and protrudes along the second direction relative to the second main body portion, and the second grounding point is arranged on the second extension portion.
9. The antenna device according to any one of claims 6 to 8, wherein the first main body portion and the second main body portion are sequentially extended along a first direction, a width dimension of the first coupling portion along the second direction is greater than a width dimension of the first main body portion along the second direction, wherein the second direction is perpendicular to the first direction; or/and,

   The first main body portion and the second main body portion are sequentially extended along a first direction, a width dimension of the second coupling portion along a second direction is greater than a width dimension of the second main body portion along the second direction, wherein the second direction is perpendicular to the first direction.
10. The antenna device according to any one of claims 1 to 9, wherein the first radiator is further used to support a third frequency band of a Long Term Evolution (LTE) signal, and the second radiator is further used to support a fourth frequency band of an LTE signal. The third frequency band is different from the fourth frequency band.
11. The antenna device according to claim 10, wherein:

    The third frequency band is a high frequency band; or,

    The fourth frequency band is a medium frequency band.
12. The antenna device according to claim 10 or 11, wherein:

    The central frequency point of the third frequency band falls within the frequency band range of 2.30 GHz-3.690 GHz; or,

    The center frequency point of the fourth frequency band falls within the frequency band range of 1.71 GHz-2.17 GHz.
13. The antenna device according to any one of claims 10 to 12, wherein the antenna device further comprises a tuning circuit, and the second grounding point is grounded through the tuning circuit.
14. The antenna device as claimed in claim 13, wherein the tuning circuit includes a switch module and at least two tuning branches, and at least two of the tuning branches are connected in parallel; the tuning circuit is configured to selectively connect at least one of the at least two tuning branches to the loop of the second radiator through the switch module.
15. The antenna device according to any one of claims 1 to 9, wherein the second frequency band is the same as the first frequency band, so that the second radiator can disperse the current distribution on the first radiator corresponding to the first frequency band.
16. The antenna device according to claim 15, wherein:

    The first radiator has a first free end away from the second radiator, a portion of the first radiator from the feeding point to the first free end forms a first current path, a low-order mode of the first current path is used to form a first resonance mode, and the first resonance mode represents that the first radiator generates resonance in the first frequency band;

    The portion of the first radiator from the feeding point to the gap and the second radiator together form a second current path, and the balanced mode or high-order mode of the second current path is used to form a second resonant mode. The second resonant mode characterizes the resonance of the first radiator and the second radiator in the second frequency band.
17. The antenna device according to any one of claims 15 or 16, wherein the first frequency band is a high frequency band.
18. The antenna device according to any one of claims 15 to 17, wherein the center frequency of the first frequency band falls within a frequency band range of 2.496 GHz to 2.690 GHz; or

    The center frequency point of the first frequency band falls within the frequency band range of 3.30 GHz-3.80 GHz.
19. An electronic device comprises a housing and the antenna device according to any one of claims 1 to 18, wherein the first radiator and the second radiator are arranged in the housing.
20. The electronic device as claimed in claim 19, wherein the shell includes a carrying portion and a frame connected to the carrying portion, and the first radiator and the second radiator are integrated into the frame.
21. The electronic device as claimed in claim 20, wherein the material of the frame includes plastic, the first radiator and the second radiator are both flexible circuit board radiators, and the first radiator and the second radiator are superimposed on the surface of the frame or embedded in the frame.
22. An electronic device, comprising a frame and the antenna device according to any one of claims 1 to 18, wherein the frame is made of metal, the frame is provided with a gap, the gap of the frame divides the frame into two parts, the antenna device is integrated in the frame, and the gap of the frame is a gap between a second radiator and the first radiator.