Antenna module and electronic device

Abstract

This application discloses an antenna module and an electronic device, belonging to the field of communication technology. The antenna module includes a radiating element and a feed source. The radiating element includes a first radiator, a second radiator, and a conductive element. The first and second radiators are of the same size, with a first end of the first radiator facing the first end of the second radiator, and a first gap between them. The conductive element has an elongated structure; the first end of the first radiator is electrically connected to a first portion of the conductive element, and the first end of the second radiator is electrically connected to a second portion of the conductive element. Both ends of the conductive element are grounded. The feed source is electrically connected to a third portion of the conductive element, located in the middle region of the conductive element, with the first and second portions distributed on opposite sides of the third portion. Under the feeding action of the feed source, the first and second radiators generate pairs of radiating currents with opposite directions and the same magnitude.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to an antenna module and an electronic device. Background Technology

[0002] Specific Absorption Rate (SAR) refers to the ratio of electromagnetic energy absorbed by the human body from mobile phones or wireless products. To meet SAR standard requirements, most manufacturers now incorporate SAR reduction measures into the antenna design of their electronic devices.

[0003] In related technologies, a common and effective method is to add a SAR sensor to electronic devices. When a human body approaches the electronic device, the SAR sensor detects this and reduces the transmission power of the electronic device, thus reducing SAR; when the human body moves away from the electronic device, the transmission power returns to normal. Another method is to utilize the reflection or deflection of electromagnetic fields by metals to reduce the electromagnetic field energy radiated by the antenna into human tissue, thereby reducing SAR at its source.

[0004] However, SAR sensor devices require a large suspended metal structure and also need to be designed in conjunction with the SAR sensor circuitry. This increases the difficulty of antenna design. Furthermore, when the SAR sensor is working, the antenna's transmission power is significantly reduced, which also greatly affects the antenna's signal quality. Schemes that utilize metal to reflect or direct electromagnetic fields require a large enough area of ​​metal structure to work. However, the antenna design space of general electronic devices is very compact. Implementing an additional metal structure is not only a challenge, but it also reduces the antenna clearance and affects antenna performance.

[0005] As can be seen from the above, the SAR reduction schemes of antenna modules in related technologies have the problem of reducing antenna performance. Summary of the Invention

[0006] The purpose of this application is to provide an antenna module and electronic device that can solve the problem that reducing the SAR of antenna modules in related technologies will reduce antenna performance.

[0007] In a first aspect, embodiments of this application provide an antenna module, including: a radiating element and a feed source;

[0008] The radiation unit includes a first radiator, a second radiator, and a conductive element;

[0009] The first radiator and the second radiator are the same size, the first end of the first radiator is opposite to the first end of the second radiator, and there is a first gap between the first end of the first radiator and the first end of the second radiator.

[0010] The conductive component has an elongated strip structure. The first end of the first radiator is electrically connected to the first part of the conductive component, and the first end of the second radiator is electrically connected to the second part of the conductive component. Both ends of the conductive component are grounded.

[0011] The feed source is electrically connected to the third part of the conductive element, wherein the third part is located in the middle region of the conductive element, and the first part and the second part are distributed on opposite sides of the third part;

[0012] Under the power supplied by the feed source, the first radiator and the second radiator generate radiation current pairs with opposite directions and the same magnitude.

[0013] Secondly, embodiments of this application provide an electronic device including the antenna module described in the first aspect.

[0014] In this embodiment, the feed source powers the middle region of the conductive element, while both ends of the conductive element are grounded. By electrically connecting the first end of the first radiator to the first part of the conductive element, and the first end of the second radiator to the second part of the conductive element, radiated currents of the same magnitude but opposite directions can be formed on the first and second radiators. This radiated current pair allows the electric field null point of the antenna module to be located in the middle of the first gap between the first and second radiators, while the electric field strength points are located at the ends far from the first gap, thereby dispersing the SAR hotspots of the antenna module and reducing the SAR peak value. This solution does not require reducing the antenna's RF power, nor does it require additional metal structures occupying antenna layout space, and it does not affect antenna performance. Attached Figure Description

[0015] Figure 1 This is one of the structural schematic diagrams of an antenna module provided in the embodiments of this application;

[0016] Figure 2 This is a second schematic diagram of the structure of an antenna module provided in an embodiment of this application;

[0017] Figure 3 yes Figure 2 A schematic diagram of the current mode of the first frequency band of the antenna module shown.

[0018] Figure 4 yes Figure 2 A schematic diagram of the current mode of the second frequency band of the antenna module shown.

[0019] Figure 5a It is one of the first current modes of a monopole antenna in related technologies;

[0020] Figure 5bIt is the second current mode of the first monopole antenna in related technologies;

[0021] Figure 6a It is one of the second current modes of monopole antennas in related technologies;

[0022] Figure 6b It is the second current mode of the second type of monopole antenna in related technologies;

[0023] Figure 7a It is one of the third current modes of monopole antennas in related technologies;

[0024] Figure 7b It is the second of the third current modes of monopole antennas in related technologies;

[0025] Figure 8a It is one of the fourth current modes of monopole antennas in related technologies;

[0026] Figure 8b It is the second of the fourth current modes of monopole antennas in related technologies;

[0027] Figure 8c It is the third of the fourth current modes of monopole antennas in related technologies;

[0028] Figure 8d It is the fourth current mode of the fourth type of monopole antenna in related technologies;

[0029] Figure 9a It is one of the fifth current modes of monopole antennas in related technologies;

[0030] Figure 9b It is the second of the fifth current modes of monopole antennas in related technologies;

[0031] Figure 10a yes Figure 2 The diagram shows the current distribution of the antenna module in the B3 band.

[0032] Figure 10b yes Figure 2 The diagram shows the current distribution of the antenna module in the B1 band.

[0033] Figure 10c yes Figure 2 The diagram shows the current distribution of the antenna module in the B7 band.

[0034] Figure 10d yes Figure 2 The diagram shows the current distribution of the antenna module in the N78 frequency band.

[0035] Figure 11 yes Figure 2A schematic diagram of the antenna parameter curves for the antenna module shown.

[0036] Figure 12 yes Figure 2 A schematic diagram of the efficiency curve of the antenna module shown.

[0037] Figure 13 This is the third schematic diagram of the structure of an antenna module provided in the embodiments of this application;

[0038] Figure 14a yes Figure 11 The diagram shows the current distribution of the antenna module in the B3 band.

[0039] Figure 14b yes Figure 11 The diagram shows the current distribution of the antenna module in the B1 band.

[0040] Figure 14c yes Figure 11 The diagram shows the current distribution of the antenna module in the B7 band.

[0041] Figure 14d yes Figure 11 The diagram shows the current distribution of the antenna module in the N78 frequency band.

[0042] Figure 15a yes Figure 11 A schematic diagram of antenna parameter curves after the four antenna elements in the antenna module are combined.

[0043] Figure 15b yes Figure 11 A schematic diagram of the passive efficiency curves of the four antenna elements combined in the antenna module shown.

[0044] Figure 16a This is one of the structural schematic diagrams of the electronic device provided in the embodiments of this application;

[0045] Figure 16b This is a second schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0046] Figure 16c This is the third schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0047] Figure 16d This is the fourth schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0049] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0050] The antenna module and electronic device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0051] See Figure 1 An antenna module provided in this application includes: a radiating element 1 and a feed 2;

[0052] Radiation unit 1 includes a first radiator 11, a second radiator 12, and a conductive element 13;

[0053] The first radiator 11 and the second radiator 12 have the same size. The first end of the first radiator 11 is opposite to the first end of the second radiator 12, and there is a first gap 10 between the first end of the first radiator 11 and the first end of the second radiator 12.

[0054] The conductive element 13 has a long strip structure. The first end of the first radiator 11 is electrically connected to the first part A of the conductive element 13, and the first end of the second radiator 12 is electrically connected to the second part C of the conductive element 13. The two ends of the conductive element 13 are grounded respectively.

[0055] The feed source 2 is electrically connected to the third part B of the conductive element 13, wherein the third part B is located in the middle region of the conductive element 12, and the first part A and the second part B are distributed on opposite sides of the third part B.

[0056] Under the power supply provided by the feed source 2, the first radiator 11 and the second radiator 12 generate radiation current pairs with opposite directions and the same magnitude.

[0057] In some embodiments, the first end of the first radiator 11 and the first part A of the conductive member 13 can be connected by any electrical connection structure such as a first spring or a first metal tongue. Similarly, the first end of the second radiator 12 and the second part C of the conductive member 13 can also be connected by any electrical connection structure such as a second spring or a second metal tongue. No specific limitation is made on the electrical connection structure here.

[0058] It should be noted that the first end of the first radiator 11 is opposite to the first end of the second radiator 12, and the second ends of the first radiator 11 and the second radiator 12 extend in opposite directions. Thus, the first radiator 11 and the second radiator 12 have the same size and extend in opposite directions. At the same time, the conductor 13 is fed in the middle, and the two ends of the conductor 13 are grounded respectively. Thus, the two ends of the conductor 13 serve as the return paths of the radiated currents on the first radiator 11 and the second radiator 12, so that the first radiator 11 and the second radiator 12 can form a pair of radiated currents of the same size and opposite directions. This pair of radiated currents can make the electric field zero point on the antenna module located at the middle position of the first gap 10 between the first radiator 11 and the second radiator 12, and form electric field strength points in the regions of the first radiator 11 and the second radiator 12 away from the first gap 10, thereby realizing the dispersion of SAR hotspots of the antenna module and reducing SAR peak values.

[0059] In some embodiments, the conductive element 13 can be any elongated FPC, microstrip line, metal strip, etc. For ease of explanation, in the embodiments of this application, the conductive element 13 is usually described as a second microstrip line, which does not constitute a specific limitation.

[0060] In some embodiments, the electrical lengths of the first radiator 11 and the second radiator 12 are respectively 1 / 4 wavelength of the operating frequency band of the feed.

[0061] It is worth mentioning that the radiating current pairs on the first radiator 11 and the second radiator 13, which are of the same magnitude but opposite in direction, will not change with the resonant frequency of the first radiator 11 and the second radiator 13. In other words, the size of the first radiator 11 and the second radiator 13 can be flexibly set according to the operating frequency band required by the antenna module. Furthermore, regardless of the antenna frequency band, the current patterns on the first radiator 11 and the second radiator 12 always maintain a radiating current pair of 1 / 4 wavelength with opposite directions and the same magnitude.

[0062] In this embodiment, a 1 / 4 wavelength current pattern with opposite directions and the same size can be constructed on the first radiator 11 and the second radiator 12. In this way, the current pattern can make the electric field zero point on the antenna module located at the middle position of the first gap 10 between the first radiator 11 and the second radiator 12, while the electric field strength points are located at both ends far away from the first gap 10, so that the two electric field strength points are as far apart as possible, which can more effectively reduce the SAR peak.

[0063] Of course, in other embodiments, the electric lengths of the first radiator 11 and the second radiator 13 can be 1 / 2 wavelength or 3 / 4 wavelength of the operating frequency band of the feed, respectively. In this case, the distance between the electric field strength points on the first radiator 11 and the second radiator 12 may be reduced compared to the 1 / 4 wavelength current mode. However, as long as the radiation currents on the first radiator 11 and the second radiator 12 are opposite in direction and the same in magnitude, the effect of dispersing SAR hotspots can be achieved.

[0064] For ease of explanation, this embodiment of the application uses the example of a 1 / 4 wavelength current mode formed on the first radiator 11 and the second radiator 12 as an example, which does not constitute a specific limitation.

[0065] In some implementations, such as Figure 2 As shown, the radiation unit 1 also includes: a first filtering module 14, a second filtering module 15, a third filtering module 16 and a fourth filtering module 17;

[0066] The first end of the conductive component 13 is grounded through the first filter module 14 and the second filter module 15, and the second end of the conductive component 13 is grounded through the third filter module 16 and the fourth filter module 17.

[0067] The operating frequency band of the feed source 2 includes a first frequency band and a second frequency band. The upper limit frequency of the first frequency band is lower than the lower limit frequency of the second frequency band. The passband of the first filter module 14 and the third filter module 16 includes the first frequency band, and the stopband of the first filter module 14 and the third filter module 16 includes the second frequency band. The passband of the second filter module 15 and the fourth filter module 17 includes the second frequency band, and the stopband of the second filter module 15 and the fourth filter module 17 includes the first frequency band.

[0068] Under the passband effect of the first filter module 14, the electrical length of the first radiator 11 is 1 / 4 wavelength of the first frequency band; under the passband effect of the third filter module 16, the electrical length of the second radiator 12 is 1 / 4 wavelength of the first frequency band; under the passband effect of the second filter module 15, the electrical length of the first radiator 11 is 1 / 4 wavelength of the second frequency band; under the passband effect of the fourth filter module 17, the electrical length of the second radiator 12 is 1 / 4 wavelength of the second frequency band.

[0069] In some implementations, the first filter module 14, the second filter module 15, the third filter module 16, and the fourth filter module 17 can be electrically connected to the end of the conductive component 13 via pads.

[0070] In some implementations, the upper frequency limit of the first frequency band, i.e. the highest frequency in the first frequency band, is lower than the lower frequency limit of the second frequency band, i.e. the lowest frequency in the second frequency band. In this case, the first filter module 14 and the third filter module 16 may include low-pass high-impedance devices, and the second filter module 15 and the fourth filter module 17 may include high-pass low-impedance devices.

[0071] For ease of explanation, in this embodiment of the application, the first frequency band includes a low-frequency (LB) band, such as the B1 or B3 band, and the second frequency band includes a mid-high frequency (MHB) band, such as the B7, B40, or New Radio (NR) band, as an example. In this case, the first filter module 14 and the third filter module 16 may include low-pass high-impedance devices, and the second filter module 15 and the fourth filter module 17 may include high-pass low-impedance devices.

[0072] It should be noted that, based on the inductive loading of the low-pass, high-impedance devices in the first filter module 14 and the third filter module 16, the equivalent electrical lengths of the first radiator 11 and the second radiator can be shortened, so that the equivalent electrical lengths of the first radiator 11 and the second radiator are respectively matched with 1 / 4 wavelength of the MHB band. Furthermore, based on the capacitive loading of the low-pass, high-impedance devices in the second filter module 15 and the fourth filter module 17, the equivalent electrical lengths of the first radiator 11 and the second radiator can be increased, so that the equivalent electrical lengths of the first radiator 11 and the second radiator are respectively matched with 1 / 4 wavelength of the LB band. Thus, in both the MHB and LB bands, a 1 / 4 wavelength current mode can be formed on the first radiator 11 and the second radiator 12, and the radiated currents on the first radiator 11 and the second radiator 12 remain opposite in direction and the same in magnitude.

[0073] For example: for the B7 band, B40 band, or NR band, it is in Figure 2 The current modes on the antenna module shown are as follows: Figure 3 As indicated by the middle arrow, by Figure 3It can be seen that the current signals of the B7 band, B40 band, or NR band are transmitted to the first gap 10 from the second end of the first radiator 11 and the second end of the second radiator 12, respectively, and are grounded through the high-pass low-impedance devices at both ends of the conductive element 13, namely the first filter module 14 and the third filter module 16.

[0074] For example, for the B1 or B3 frequency band, it is in Figure 2 The current modes on the antenna module shown are as follows: Figure 4 As indicated by the middle arrow, by Figure 4 It can be seen that the current signals of the B1 or B3 frequency bands are transmitted to the first gap 10 from the second end of the first radiator 11 and the second end of the second radiator 12, respectively, and are grounded through the low-pass high-impedance devices at both ends of the conductive element 13, namely the second filter module 15 and the fourth filter module 17.

[0075] It is worth mentioning that, in related technologies, at least two current modes can be constructed on the same antenna to cover both LB and MHB.

[0076] For example, for a monopole antenna, it is generally possible to excite the 1 / 4 mode and 3 / 4 mode of the antenna body to cover LB and MHB. However, from the current distribution on the antenna body, the current modes of LB and MHB are different. Among them, the 1 / 4 mode of a traditional monopole antenna is as follows: Figure 5a As shown, the 3 / 4 pattern is as follows Figure 5b As shown.

[0077] For example, for an inverted-F antenna (IFA), it is generally possible to excite the antenna body in 1 / 4 mode and 3 / 4 mode to cover LB and MHB. However, from the current distribution on the antenna body, the current modes of LB and MHB are different. Among them, the 1 / 4 mode of a traditional IFA antenna is as follows: Figure 6a As shown, the 3 / 4 pattern is as follows Figure 6b As shown.

[0078] For example, the IFA+ switching antenna scheme can typically excite 1 / 4 mode and 3 / 4 mode of the antenna body to cover LB and MHB or more frequency bands. However, from the current distribution on the antenna body, the current modes of LB and MHB are different. Among them, the 1 / 4 mode of the IFA+ switching antenna is as follows: Figure 7a As shown, the 3 / 4 pattern is as follows Figure 7b As shown.

[0079] For example, a T-antenna design can typically excite 1 / 4 mode of the long and short sides, 3 / 4 mode of the long side, and 1 / 2 mode of the entire stub to cover LB and MHB or more frequency bands. However, from the current distribution on the antenna body, the current modes of LB and MHB are different. Specifically, the 1 / 4 mode of the long side of the T-antenna is as follows: Figure 8a As shown, the short side 1 / 4 pattern is as follows Figure 8b As shown, the 3 / 4 pattern of the long side is as follows Figure 8c As shown, the 1 / 2 pattern of the pruning node is as follows Figure 8d As shown.

[0080] For example, the IFA+ parasitic antenna scheme can typically excite both unidirectional and antidirectional current distributions on the antenna body to cover LB and MHB or more frequency bands. However, from the perspective of the current distribution on the antenna body, the current modes of LB and MHB are different. Among them, the unidirectional current distribution is as follows: Figure 9a As shown, the reverse current distribution is as follows Figure 9b As shown.

[0081] As can be seen from the above, antenna schemes in related technologies require the construction of at least two current modes on the same antenna to cover both LB and MHB. When this antenna scheme is used to combine multiple antennas, the modes of LB and MHB will also be different. Therefore, when a single antenna body in related technologies implements multi-frequency broadband antennas such as LB and MHB, the antenna implementation mechanisms operating in different frequency bands are all different. For example, a multi-frequency broadband antenna can be constructed by using the fundamental mode + higher-order modes of the antenna, or by using switching to implement a multi-frequency broadband antenna, or by combining different modes of the antenna. Due to the different modes of the antenna, when one mode has low SAR characteristics, other modes, due to significant differences from that mode, frequency offset, or mode incompatibility, will prevent the antenna from achieving high-performance low SAR characteristics across the entire bandwidth. For these reasons, when the antenna scheme on the same electronic device is composed of antenna units from the above-mentioned related technologies combined and stacked to form a multi-antenna array, the difference in modes of the basic antenna elements will result in the inability to achieve low SAR characteristics across the overall bandwidth.

[0082] In this embodiment, four filtering modules can be used to achieve frequency selection. The feed 2 simultaneously provides excitation signals for both the first and second frequency bands. The first frequency band signal on the first radiator 11 is grounded through the first filtering module 14, the first frequency band signal on the second radiator 12 is grounded through the third filtering module 16, the second frequency band signal on the first radiator 11 is grounded through the second filtering module 15, and the second frequency band signal on the second radiator 12 is grounded through the fourth filtering module 17. Furthermore, in passband mode, the four filtering modules can adjust the equivalent electrical length of the first radiator 11 and the second radiator 12, enabling the antenna module of this embodiment to simultaneously cover both the LB and MHB frequency bands. This ensures that both the MHB and LB frequency bands can form a 1 / 4 wavelength current mode on the first radiator 11 and the second radiator 12, while maintaining the radiated current pairs on the first radiator 11 and the second radiator 12 as opposite in direction and equal in magnitude.

[0083] For example, if the first frequency band is lower than the second frequency band, and the wavelength of the center frequency point of the first frequency band is greater than the wavelength of the center frequency point of the second frequency band, then the first filter module 14 can be a low-pass, high-impedance module. For the first frequency band signal on the first radiator 11, the first filter module 14 is in a conducting state. At this time, the conducting first filter module 14 is equivalent to an inductive load, acting on the first radiator 11, which will extend the equivalent electrical length of the first radiator 11, so that the equivalent electrical length of the first radiator 11 matches 1 / 4 of the wavelength of the first frequency band. The second filter module 15 can be a high-pass, low-impedance module. For the second frequency band signal on the first radiator 11, the second filter module 15 is in a conducting state. At this time, the conducting second filter module 15 is equivalent to a capacitive load, acting on the first radiator 11, which will shorten the equivalent electrical length of the first radiator 11, so that the equivalent electrical length of the first radiator 11 matches 1 / 4 of the wavelength of the second frequency band.

[0084] Similarly, for the first frequency band signal on the second radiator 12, the third filter module 16 is in the conducting state. At this time, the conducting third filter module 16 is equivalent to an inductive load, acting on the second radiator 12, which will extend the equivalent electrical length of the second radiator 12, so that the equivalent electrical length of the second radiator 12 matches 1 / 4 wavelength of the first frequency band. For the second frequency band signal on the second radiator 12, the fourth filter module 17 is in the conducting state. At this time, the conducting fourth filter module 17 is equivalent to a capacitive load, acting on the second radiator 12, which will shorten the equivalent electrical length of the second radiator 12, so that the equivalent electrical length of the second radiator 12 matches 1 / 4 wavelength of the second frequency band.

[0085] Thus, for the first frequency band and the second frequency band, the current modes constructed on the first radiator 11 and the second radiator 12 are the same, so low SAR characteristics of the first frequency band and the second frequency band can be achieved simultaneously.

[0086] For example: Suppose that the filter modules, such as the first filter module 14, the second filter module 15, the third filter module 16, and the fourth filter module 17, are all connected to the ground plane to achieve grounding. In this case, for the B3 frequency band, Figure 2 The current distribution in the antenna module shown is as follows Figure 10a As shown; for the B1 band, Figure 2 The current distribution in the antenna module shown is as follows Figure 10b As shown; for the B7 band, Figure 2 The current distribution in the antenna module shown is as follows Figure 10c As shown; for the N78 frequency band, Figure 2 The current distribution in the antenna module shown is as follows Figure 10d As shown. By Figures 10a to 10d It is evident that B3, B1, B7, and N78 all operate in the same mode across all high frequencies, meaning that the same antenna body forms a reverse-symmetrical current distribution across the entire frequency band.

[0087] It is worth mentioning that, such as Figure 2 The antenna module shown achieves low SAR characteristics in both the MHB and LB bands while also exhibiting high antenna radiation performance.

[0088] For example: Figure 11 As shown, Figure 2 The diagram shows the antenna parameter curves of the antenna module shown; as follows: Figure 12 As shown, Figure 2 The diagram shows the efficiency curve of the antenna module. Figure 11 In the diagram, the solid line represents the S11 parameter curve of the antenna module, and the dashed line represents the S22 parameter curve of the antenna module. The S11 parameter is an important scattering parameter (S-parameter) of the antenna, used to characterize the reflection characteristics of the antenna input port. Figure 12 In the diagram, the solid line represents the overall system efficiency parameter after considering the matching circuit during electromagnetic simulation using simulation software, while the dashed line represents the ratio of the actual power radiated by the antenna module to the total power provided by the excitation source, obtained through simulation software. Figure 11 and Figure 12 It can be seen that, Figure 2 The antenna module shown can achieve low S11 and S22 parameters and high overall system efficiency throughout the MHB and LB frequency bands. That is, the antenna module of this application embodiment has good antenna radiation performance.

[0089] It should be noted that, in this embodiment, the example of a single radiator using a monopole antenna structure is used for illustration. In other embodiments, the single radiator can use any other antenna structure such as an IFA antenna, loop antenna, slot antenna, monopole antenna, patch antenna, etc., as long as the two antennas in the same radiating element 1 are the same size and are centrally symmetrical.

[0090] In some implementations, such as Figure 13 As shown, the antenna module provided in this application embodiment may include two radiating elements, respectively labeled as the first radiating element 101 and the second radiating element 102;

[0091] The third part B in the first radiating unit 101 and the third part B in the second radiating unit 102 are electrically connected to the feed source 2 through the combining component 3.

[0092] In this embodiment, after the two radiating elements 1 are re-circuited and fed, the SAR hotspots of the antenna module can be dispersed a second time, thus achieving lower SAR characteristics.

[0093] In some implementations, the combining component 3 includes at least one of the following:

[0094] First microstrip line, coaxial line, RF combiner.

[0095] For example: Figure 13 As shown, taking the combining component 3 including a first microstrip line as an example, the first microstrip line includes a first branch 31, a second branch 32 and a bus 33. One end of the first branch 31 and the second branch 32 are respectively connected to the third part B in the two radiating units 1, and the other end of the first branch 31 and the second branch 32 are respectively connected to the feed source 2 through the bus 33.

[0096] Of course, the first microstrip line can be replaced with a coaxial line, or a radio frequency combiner can be used for feeding; no specific limitations are made here.

[0097] In this embodiment, the combined feeding of two radiating units 1 can be achieved using a simple circuit or radio frequency combiner.

[0098] In some implementations, such as Figure 13 As shown, the antenna module in this embodiment further includes: a phase modulation device 4;

[0099] The phase modulation device 4 is connected between the feed source 2 and the first radiation unit 101 so that the feed signal of the second radiation unit 101 and the feed signal of the second radiation unit 102 have a phase difference.

[0100] The first radiation unit 101 is either of the two radiation units 1, and the second radiation unit 102 is the other one of the two radiation units 1 besides the first radiation unit 101.

[0101] In some embodiments, the phase difference between the feed signal of the second radiating unit 101 and the feed signal of the second radiating unit 102 is 90°. This enables the feed signal of the second radiating unit 101 to be orthogonal to the feed signal of the second radiating unit 102, thereby achieving a high degree of isolation between the second radiating unit 101 and the second radiating unit 102.

[0102] Of course, the phase difference between the feed signal of the second radiating unit 101 and the feed signal of the second radiating unit 102 may be any phase difference greater than 0 and less than 180°, which is not specifically limited here. Of course, the isolation performance is optimal when the phase difference between the feed signal of the second radiating unit 101 and the feed signal of the second radiating unit 102 is 90°.

[0103] In this embodiment, the isolation between the second radiation unit 101 and the second radiation unit 102 is improved by the phase difference between the two radiation units 1. In this way, the second radiation unit 101 and the second radiation unit 102 can use 4 antenna units to radiate and form two sets of radiation current pairs with similar size and opposite direction. This can further form a zero electric field in the middle and a large electric field at both ends between the two sets of antenna pairs, thereby realizing the secondary dispersion of SAR hotspots.

[0104] In some embodiments, the line length between the feed source 2 and the first radiating unit 101 is a first length, and the line length between the feed source 2 and the second radiating unit 102 is a second length. The first length and the second length are different, so that the feed signal of the second radiating unit 101 and the feed signal of the second radiating unit 102 have a phase difference.

[0105] Wherein, the first radiation unit 101 is any one of the two radiation units 1, and the second radiation unit 102 is one of the two radiation units 1 other than the first radiation unit 101.

[0106] Similar to the above embodiment, the phase difference between the feed signal of the second radiating unit 101 and the feed signal of the second radiating unit 102 is 90°. This enables the feed signal of the second radiating unit 101 to be orthogonal to the feed signal of the second radiating unit 102, thereby achieving a high degree of isolation between the second radiating unit 101 and the second radiating unit 102.

[0107] Unlike the previous embodiment, this embodiment does not require additional phase-tuning devices. The second radiating element 101 and the second radiating element 102 can be connected via a first microstrip line or coaxial line. Feeding can be achieved at a 90° phase difference between the second radiating element 101 and the second radiating element 102 on this first microstrip line or coaxial line. This feed point on the first microstrip line or coaxial line serves as the feed signal point for the entire antenna module. MHB and NR radio frequency signals are fed in from here, and through the first microstrip line or notification line, feed signals with a 90° phase difference to the second radiating element 101 and the second radiating element 102 respectively. This also achieves high isolation between the second radiating element 101 and the second radiating element 102, thereby achieving secondary dispersion of SAR hotspots.

[0108] This embodiment achieves the same beneficial effects as the phase modulation device scheme in the previous embodiment, and the structure is simpler.

[0109] It is worth noting that, assuming the combining component 3 is the first microstrip line, the MHB and NR full-band signals provided by the feed 2 reach the second radiating unit 101 and the second radiating unit 102 through the first microstrip line. The MHB and NR full-band signals enter the first radiator 11 and the second radiator 12, which are of the same size but have opposite routing directions, through the conductive element 13 for external radiation. Since the feed signal is fed from the central region of the conductive element 13 connecting the first radiator 11 and the second radiator 12, and the first radiator 11 and the second radiator 12 have opposite orientations and the same size, a pair of radiation currents of similar magnitude but opposite directions will appear on the first radiator 11 and the second radiator 12. If the resonance generated by this pair of currents occurs at B1 or B3, then within the frequency range of B1 or B3, a zero electric field point will be formed in the middle of the first radiator 11 and the second radiator 12, while the electric field points at both ends will be larger, thereby achieving SAR hotspot dispersion. As mentioned earlier, if the resonance formed by the current pair is in the B7, B40, or NR frequency band, and the grounding points of the first radiator 11 and the second radiator 12 are grounded through two sets of low-pass, high-impedance devices on both sides of the conductive element 13, then if two more sets of high-pass, low-impedance devices are grounded at the same locations on both sides, then the B7, B40, or NR antenna will resonate because of the same antenna pair. When this high-frequency resonance is formed, the current on the two antenna pairs is of similar magnitude but opposite direction. The antenna will form a zero electric field in the middle and a large electric field at both ends, thereby achieving SAR hotspot dispersion.

[0110] In this way, by using radiators of the same size but facing opposite directions, a central feed, and a filter module, two pairs of radiating currents of similar size but opposite directions are formed on the radiators. This creates a zero electric field in the middle and a large electric field at both ends, thereby achieving SAR hotspot dispersion. Most importantly, such a resonant structure can be achieved in the intermediate frequency B1 or B3, and in the high frequency B7 or B40 or NR, thus achieving a low SAR effect across the entire high frequency range.

[0111] Furthermore, by combining the two radiating elements 1 again through the first microstrip line, and by controlling the length of the line connecting the two radiating elements 1 or by using a phase shifter or similar device, a 90° phase difference is created between the two radiating elements 1. This further disperses radiating current pairs of similar magnitude but opposite directions on the two radiating elements 1. The antenna will then achieve a zero electric field in the middle of the four antenna radiators and a larger electric field at both ends, thereby achieving secondary dispersion of SAR hotspots and ultimately achieving low SAR characteristics under the 0mm 10g SAR requirement.

[0112] In this embodiment, an antenna array composed of four monopole antennas is used to realize a low SAR antenna scheme.

[0113] For example: Suppose that two radiating elements 1 are grounded through adjacent sides of the floor, then for the B3 frequency band, Figure 13 The current distribution in the antenna module shown is as follows Figure 14a As shown; for the B1 band, Figure 13 The current distribution in the antenna module shown is as follows Figure 14b As shown; for the B7 band, Figure 13 The current distribution in the antenna module shown is as follows Figure 14c As shown; for the N78 frequency band, Figure 13 The current distribution in the antenna module shown is as follows Figure 14d As shown. By Figures 14a to 14d It is evident that B3, B1, B7, and N78 all operate in the same mode across all high frequencies, meaning that the same antenna body forms a reverse-symmetrical current distribution across the entire frequency band.

[0114] It is worth mentioning that, such as Figure 13 The antenna module shown achieves low SAR characteristics in both the MHB and LB bands while also exhibiting high antenna radiation performance.

[0115] For example: Figure 15a As shown, Figure 13 The diagram shows the antenna parameter curves of the antenna module shown; as follows: Figure 15b As shown, Figure 13 The diagram shows the efficiency curve of the antenna module. Figure 15a The medium curve is specifically as follows Figure 13 The S11 parameter curve of the antenna module shown. Figure 15b The middle curve is specifically for... Figure 13 When the antenna module shown was subjected to electromagnetic simulation using simulation software, the overall system efficiency parameter after the matching circuit was considered. Figure 15a and Figure 15b It can be seen that, Figure 13 The antenna module shown can achieve low S11 parameters and high overall system efficiency throughout the MHB and LB frequency bands, meaning that the antenna module of this application embodiment has good antenna radiation performance.

[0116] Specifically, see Table 1 below. Figure 13 The antenna module shown has efficiency at at least two frequencies in the intermediate frequency (B3, B1), high frequency (B40, B7, B38 / 41), and N78 bands, as well as simulation diagrams of relevant parameters under 0mm 10g body SAR usage conditions and scenarios.

[0117] Table 1

[0118]

[0119] As can be seen from Table 1 above, the antenna module of this application embodiment, under the 0mm 10g body SAR usage state and scenario, can achieve an active total radiated power (TRP) of 19dBm or above when the SAR value is less than 1.1W / kg. This can effectively improve the performance of the antenna transmission system and enhance the user experience.

[0120] This application also provides an electronic device, which includes any of the antenna modules provided in the foregoing embodiments of this application.

[0121] In some embodiments, the electronic device in this application can be a terminal, or it can be any other device besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application does not specifically limit the scope of the electronic device.

[0122] The electronic device provided in this application embodiment may include those described in the foregoing embodiments of this application. Figure 1 , Figure 2 or Figure 13 The antenna module shown can achieve the same beneficial effects, and will not be described again here to avoid repetition.

[0123] In some embodiments, the electronic device in this application includes, for example: Figure 13 In the case of the antenna module shown, four radiators belonging to the two radiating elements 1 in the antenna module can be used to form four 4G+N78 co-frequency antennas. These are combined using four monopole antennas arranged in pairs, where the two monopole antennas in the same pair face opposite directions and are of the same size. Assuming the combination of four sets of high-pass low-impedance devices and four sets of low-pass high-impedance devices, the four pairs of monopole antennas can time-division multiplex the intermediate frequency (B3, B1), high frequency (B7, B40, B41), and N78 frequencies. Figure 13 The conducted power of each channel of the antenna module shown below when the SAR value is less than 1.1 W / kg is as follows:

[0124] Table 2

[0125]

[0126] As shown in Table 2 above, under the 0mm 10g body SAR usage conditions and scenarios of electronic devices, when the SAR value is less than 1.1W / kg, the active TRP of the antenna can reach 19dBm or above. This can effectively improve the performance of the antenna transmission system and enhance the user experience.

[0127] In some implementations, such as Figures 16a to 16d As shown, when the antenna module includes a first radiating unit 101 and a second radiating unit 102, the first radiating unit 101 is disposed on the first side 20 of the electronic device, and the second radiating unit 102 is disposed on the second side 30 of the electronic device.

[0128] The first side 20 and the second side 30 satisfy any of the following:

[0129] like Figure 16a or Figure 16b As shown, the first side 20 and the second side 30 are the two adjacent sides of the electronic device;

[0130] like Figure 16c or Figure 16d As shown, the first side 20 and the second side 30 are the opposite sides of the electronic device.

[0131] In some embodiments, the first side 20 and the second side 30 are adjacent two sides of the electronic device, which may be: the first side 20 is the top side of the electronic device, and the second side 30 is the long side of the electronic device.

[0132] In some embodiments, where the first side 20 and the second side 30 are adjacent side edges of the electronic device, such as... Figure 16a As shown, the first radiation unit 101 and the second radiation unit 102 can be set close to the same apex corner of the electronic device.

[0133] In some embodiments, where the first side 20 and the second side 30 are adjacent side edges of the electronic device, such as... Figure 16b As shown, the second radiation unit 102 can be located in the region of the second side 30 that is far from the first side 20.

[0134] In some embodiments, the first side 20 and the second side 30 are opposite sides of the electronic device. For example, the first side 20 may be the left side of the electronic device and the second side 30 may be the right side of the electronic device, or the first side 20 may be the top side of the electronic device and the second side 30 may be the bottom side of the electronic device.

[0135] In some embodiments, when the second side 30 is the bottom edge of the electronic device, a charging interface 201 is provided on the second side of the electronic device. In this case, such as Figure 16c As shown, the charging interface 201 can be disposed within the first gap 10 of the second radiating unit 102, or, as... Figure 16d As shown, the charging interface 201 is located on the side of the first radiator 11 in the second radiating unit 102 that is away from the second radiator 12.

[0136] In this embodiment, the antenna module of this application can be flexibly set on the frame of the electronic device. And because the size of a single radiator in the antenna module is small, it can flexibly avoid structures such as charging ports on the frame, thereby increasing the range of electronic devices to which the antenna module of this application is applicable.

[0137] It should be noted that in this embodiment, the radiator in the present application embodiment is constructed using a metal frame as an example for illustration. Of course, the radiator in the present application embodiment can also be implemented by other means such as flexible circuit board, rigid circuit board, plastic metallization, ceramic metallization, etc., which does not constitute a specific limitation.

[0138] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0139] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An antenna module, characterized in that, include: Radiation element and feed source; The radiation unit includes a first radiator, a second radiator, and a conductive element; The first radiator and the second radiator are the same size, the first end of the first radiator is opposite to the first end of the second radiator, and there is a first gap between the first end of the first radiator and the first end of the second radiator. The conductive component has an elongated strip structure. The first end of the first radiator is electrically connected to the first part of the conductive component, and the first end of the second radiator is electrically connected to the second part of the conductive component. Both ends of the conductive component are grounded. The feed source is electrically connected to the third part of the conductive element, wherein the third part is located in the middle region of the conductive element, and the first part and the second part are distributed on opposite sides of the third part; Under the power supplied by the feed source, the first radiator and the second radiator generate radiation current pairs with opposite directions and the same magnitude.

2. The antenna module according to claim 1, characterized in that, The electrical lengths of the first radiator and the second radiator are each 1 / 4 wavelength of the operating frequency band of the feed source.

3. The antenna module according to claim 2, characterized in that, The radiation unit further includes: a first filtering module, a second filtering module, a third filtering module, and a fourth filtering module; The first end of the conductive component is grounded through the first filter module and the second filter module, and the second end of the conductive component is grounded through the third filter module and the fourth filter module; The operating frequency band of the feed source includes a first frequency band and a second frequency band. The upper limit frequency of the first frequency band is lower than the lower limit frequency of the second frequency band. The passband of the first filter module and the third filter module includes the first frequency band, and the stopband of the first filter module and the third filter module includes the second frequency band. The passband of the second filter module and the fourth filter module includes the second frequency band, and the stopband of the second filter module and the fourth filter module includes the first frequency band. Under the passband effect of the first filter module, the electrical length of the first radiator is 1 / 4 wavelength of the first frequency band; under the passband effect of the third filter module, the electrical length of the second radiator is 1 / 4 wavelength of the first frequency band; under the passband effect of the second filter module, the electrical length of the first radiator is 1 / 4 wavelength of the second frequency band; under the passband effect of the fourth filter module, the electrical length of the second radiator is 1 / 4 wavelength of the second frequency band.

4. The antenna module according to any one of claims 1 to 3, characterized in that, The number of radiation units is two, namely the first radiation unit and the second radiation unit; The third part in the first radiation unit and the third part in the second radiation unit are respectively electrically connected to the feed source through a combining component.

5. The antenna module according to claim 4, characterized in that, The combining component includes at least one of the following: First microstrip line, coaxial line, RF combiner.

6. The antenna module according to claim 4, characterized in that, Also includes: Phase modulation devices; The phase-tuning device is connected between the feed source and the first radiating unit so that the feed signal of the first radiating unit and the feed signal of the second radiating unit have a phase difference.

7. The antenna module according to claim 5, characterized in that, The line length between the feed source and the first radiating element is a first length, and the line length between the feed source and the second radiating element is a second length. The first length and the second length are different so that the feed signal of the first radiating element and the feed signal of the second radiating element have a phase difference.

8. The antenna module according to claim 3, characterized in that, The first frequency band is the low-frequency LB band, and the second frequency band is the mid-to-high-frequency MHB band.

9. An electronic device, characterized in that, Includes the antenna module as described in any one of claims 1 to 8.

10. The electronic device according to claim 9, characterized in that, When the antenna module includes a first radiating element and a second radiating element, the first radiating element is disposed on a first side of the electronic device, and the second radiating element is disposed on a second side of the electronic device; The first side and the second side satisfy any one of the following: The first side and the second side are adjacent two sides of the electronic device; The first side and the second side are the opposite sides of the electronic device.

11. The electronic device according to claim 9, characterized in that, When a charging interface is provided on the second side of the electronic device, the charging interface is located within the first gap of the second radiating unit, or the charging interface is located on the side of the first radiator in the second radiating unit that is away from the second radiator.

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