Antenna components and electronic devices

Abstract

This application discloses an antenna assembly and electronic device, belonging to the field of communication equipment technology. The antenna assembly includes a feed section (240), a ground section (120), a line antenna (100), and a slot antenna (200). The line antenna (100) and the slot antenna (200) are electrically connected or coupled together. One of the line antenna and the slot antenna is connected to the feed section (240), and the other is connected to the ground section (120). The length of the orthographic projection of the slot antenna (200) onto the line antenna (100) is less than the length of the line antenna (100).

Description

Technical Field

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

[0002] With the rapid development of key technologies such as full-screen displays, the trend towards thinner and lighter electronic devices with extremely high screen-to-body ratios has emerged. However, this design significantly reduces the space available for antenna placement. In environments with limited antenna space, traditional antennas struggle to meet the performance requirements of multiple communication bands. Therefore, realizing multiple resonant modes in electronic devices to satisfy their multi-communication band requirements has become a pressing issue. Summary of the Invention

[0003] The purpose of this application is to provide an antenna assembly and electronic device that enables the antenna of the electronic device to generate multiple resonant modes, thereby meeting the needs of the electronic device for multiple communication frequency bands.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application provide an antenna assembly, including a feed section, a ground section, a line antenna, and a slot antenna;

[0006] The linear antenna and the slotted antenna are electrically connected or coupled together. One of the linear antenna and the slotted antenna is connected to the feed section, and the other is connected to the ground section. The length of the orthographic projection of the slotted antenna onto the linear antenna is less than the length of the linear antenna.

[0007] Secondly, embodiments of this application provide an electronic device, including a circuit board and the antenna assembly described above, wherein the power supply part is electrically connected to the radio frequency transceiver circuit of the circuit board, and the grounding part is electrically connected to the ground layer of the circuit board.

[0008] In the embodiments of this application, the line antenna and the slot antenna are electrically connected or coupled together, with one of them connected to the feed section and the other connected to the ground section. In the scheme disclosed in this application, the line antenna and the slot antenna each correspond to different frequencies of their resonant modes, thus enabling the implementation of multiple resonant modes on electronic devices. This satisfies the multi-communication frequency band requirements of electronic devices and expands their application scenarios. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the electronic device disclosed in the embodiments of this application;

[0010] Figure 2 This is a schematic diagram of the antenna assembly disclosed in the embodiments of this application;

[0011] Figure 3 This is a cross-sectional view of the first type of electronic device disclosed in the embodiments of this application;

[0012] Figure 4 This is a cross-sectional view of the second type of electronic device disclosed in the embodiments of this application;

[0013] Figure 5 for Figure 3 and Figure 4 A schematic diagram of the antenna assembly in the shown electronic device;

[0014] Figure 6 for Figure 5 Current distribution diagram at resonance 1;

[0015] Figure 7 for Figure 5 Current distribution diagram at mid-resonance 2;

[0016] Figure 8 for Figure 3 and Figure 4 The diagram shows the relationship between the reflection coefficient of the antenna assembly and frequency from 0.5 to 6 GHz.

[0017] Figure 9 This is a cross-sectional view of the third electronic device disclosed in the embodiments of this application;

[0018] Figure 10 for Figure 9 A schematic diagram of the antenna assembly of the electronic device shown.

[0019] Figure 11 for Figure 10 Current distribution diagram at resonance 1;

[0020] Figure 12 for Figure 10 Current distribution diagram at mid-resonance 2;

[0021] Figure 13 for Figure 10 The diagram shows the relationship between the reflection coefficient of the antenna assembly and frequency from 2 to 6 GHz.

[0022] Figure 14 for Figure 10 The graph shows the relationship between frequency and efficiency of the antenna assembly.

[0023] Figure 15 This is a cross-sectional view of the fourth electronic device disclosed in the embodiments of this application;

[0024] Figure 16 for Figure 15 A schematic diagram of the antenna assembly of the electronic device shown.

[0025] Figure 17 for Figure 16 Current distribution diagram at resonance 1;

[0026] Figure 18 for Figure 16 Current distribution diagram at mid-resonance 2;

[0027] Figure 19 for Figure 16 The diagram shows the relationship between the reflection coefficient and frequency of the antenna assembly from 2.5 to 6 GHz.

[0028] Figure 20 for Figure 16 The graph shows the relationship between frequency and efficiency of the antenna assembly.

[0029] Figure 21 This is a schematic diagram of the antenna assembly in the case of ground bias without bias as disclosed in the embodiments of this application;

[0030] Figure 22 for Figure 21 Current distribution diagram at resonance 1;

[0031] Figure 23 for Figure 21 Current distribution diagram at mid-resonance 2;

[0032] Figure 24 for Figure 21 The diagram shows the relationship between the reflection coefficient and frequency of the antenna assembly from 3 to 6 GHz.

[0033] Figure 25 for Figure 21 The graph shows the relationship between the frequency and efficiency of the antenna assembly.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100 - Linear antenna, 110 - First strip conductor, 111 - Third end, 112 - Fourth end, 120 - Grounding part, 200 - Slot antenna, 210 - Second strip conductor, 220 - First electrical connection part, 230 - Second electrical connection part, 240 - Feed part, 250 - Third strip conductor, 260 - First end, 270 - Second end, 310 - Cavity, 320 - First gap, 330 - Second gap, 410 - Circuit board, 420 - Back cover, 430 - Circuit board bracket, 440 - Screen bracket, 450 - Display screen, L1 - First dimension, L2 - Second dimension, L3 - First distance, L4 - Second distance, L5 - Third distance, L6 - Fourth distance, L7 - Fifth distance, L8 - Sixth distance. Detailed Implementation

[0036] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] 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 terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. 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.

[0038] The antenna components and electronic devices provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0039] Please refer to Figures 1 to 25 This application discloses an antenna assembly used in an electronic device. The antenna assembly transmits and receives electromagnetic wave signals, allowing the electronic device to communicate with networks or other devices using communication technologies. These communication technologies include, but are not limited to, Bluetooth (BT), Global Positioning System (GPS), Wi-Fi, Global System for Mobile Communications (GSM), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), 5G, Sub-6G, and other future communication technologies.

[0040] Furthermore, electronic devices can share mobile data or wireless networks with other devices (such as mobile phones, watches, tablets, or other devices capable of transmitting and receiving electromagnetic signals) via antenna components. For example, when another device enables data sharing, the electronic device can access that network by receiving its antenna signal. This ensures that the user experience of the electronic device is not affected by insufficient or depleted data.

[0041] The disclosed antenna assembly includes a feed section 240, a ground section 120, a line antenna 100, and a slot antenna 200. The line antenna 100 and the slot antenna 200 are electrically connected or coupled together. One of the line antenna 100 and the slot antenna 200 is connected to the feed section 240, and the other is connected to the ground section 120. The length of the orthographic projection of the slot antenna 200 onto the line antenna 100 is less than the length of the line antenna 100. Specifically, the radio frequency transceiver circuit of the circuit board 410 of the electronic device is connected to the feed section 240, and the ground plane of the circuit board 410 is electrically connected to the ground section 120.

[0042] In specific operation, when the grounding part 120 is connected to the linear antenna 100 and the feed part 240 is connected to the slot antenna 200, when the RF transceiver circuit emits an RF signal that excites the resonant mode of the slot antenna 200, the RF signal is transmitted to the slot antenna 200 through the feed part 240, and the slot antenna 200 radiates electromagnetic wave signals according to the RF signal. Furthermore, when the electromagnetic wave signal received by the slot antenna 200 can be converted into an RF signal, the RF signal is transmitted to the RF transceiver circuit through the feed part 240.

[0043] When the radio frequency transceiver circuit emits a radio frequency signal that matches the resonant mode of the line antenna 100, the resonant mode of the line antenna 100 is excited. In addition, when the electromagnetic wave signal received by the line antenna 100 can be converted into a radio frequency signal, the radio frequency signal is transmitted to the feed unit 240 through the line antenna 100, and the radio frequency signal is transmitted to the radio frequency transceiver circuit through the feed unit 240.

[0044] In the embodiments disclosed in this application, since the length of the antenna determines its resonant frequency, the length of the orthogonal projection of the slot antenna 200 onto the line antenna 100 is less than the length of the line antenna 100. Therefore, the slot antenna 200 and the line antenna 100 have different lengths, and thus the slot antenna 200 and the line antenna 100 correspond to different resonant mode frequencies. Therefore, multiple resonant modes can be realized on electronic devices, thereby meeting the needs of multiple communication frequency bands of electronic devices and increasing the application scenarios of electronic devices.

[0045] Furthermore, in the prior art, the supports at both ends of the slotted antenna are electrically connected to the ground plane of the circuit board 410. In other words, the slotted antenna in the prior art has two grounding terminals at both ends, thus the slotted antenna in the prior art is a "one-feed, two-ground" connection structure. In contrast, the antenna assembly disclosed in this application has only one grounding part and one feeding part, so the connection structure between the antenna assembly disclosed in this application and the circuit board 410 is much simpler.

[0046] In the embodiments disclosed in this application, the linear antenna 100 and the slotted antenna 200 are both connected to the circuit board 410 via the feed section 240, and are both connected to the ground section 120. Therefore, the antenna in the electronic device disclosed in this application has only one ground section 120 and one feed section 240. Compared with the structure of the slotted antenna in the related technology, the scheme disclosed in this application not only adds multiple resonant modes and achieves wideband coverage, but also has only one feed section 240 and one ground section 120 in the antenna structure of the electronic device in this application. Therefore, the structure is simpler, the aperture is smaller, and the installation space occupied by the circuit board 410 is smaller, thus making the antenna size smaller and alleviating the tight antenna arrangement situation.

[0047] Furthermore, the length of the slot antenna 200 projected onto the line antenna 100 is less than the length of the line antenna 100. Along the length of the line antenna 100, the slot antenna 200 does not protrude from the line antenna 100; therefore, the length of the antenna assembly disclosed in this application is approximately 0.5λ. 线 , λ 线 Since the antenna is a wavelength of the linear antenna 100, the antenna assembly disclosed in this application is shorter in length, and therefore smaller in size, occupying less mounting space on the circuit board 410, thus further alleviating the tight antenna arrangement situation.

[0048] In the above embodiments, the length direction of the linear antenna 100 can intersect with the length direction of the slot antenna 200. For example, the angle between the length direction of the linear antenna 100 and the length direction of the slot antenna 200 can be 45° or 90°. In this case, the antenna assembly is large in both directions, which results in a large clearance area for the antenna to be reserved in the electronic device, leading to a large internal installation space occupied by the antenna in the electronic device.

[0049] Therefore, in another optional embodiment, the length direction of the slot antenna 200 is parallel to the length direction of the line antenna 100. Here, the length directions of both the line antenna 100 and the slot antenna 200 are the directions of maximum size for their respective dimensions.

[0050] In this scheme, the linear antenna 100 and the slotted antenna 200 have the same length direction. That is to say, the size of the antenna assembly in both its length direction and its width direction is small, which further reduces the size of the antenna assembly and thus can further alleviate the tightness of antenna arrangement.

[0051] In a specific scheme, such as Figure 3 As shown, the linear antenna 100 has a first dimension L1 along its length, and the slot antenna 200 has a second dimension L2 along its length. The first dimension L1 is larger than the second dimension L2. At this time, the length of the antenna assembly is 0.5λ. 线 .

[0052] In another alternative embodiment, the wire antenna 100 may include a first strip conductor 110. The slot antenna 200 may include a second strip conductor 210 and an electrical connection portion. The first strip conductor 110 is the radiator of the wire antenna 100, and the second strip conductor 210 is the radiator of the slot antenna 200. The electrical connection portion may be electrically connected to both ends of the second strip conductor 210, where the two ends of the second strip conductor 210 are the two ends of the second strip conductor 210 along the length direction of the wire antenna 100. The length of the second strip conductor 210 in the orthographic projection of the first strip conductor 110 is less than the length of the first strip conductor 110. The electrical connection portion is located between the first strip conductor 110 and the second strip conductor 210, and one end of the electrical connection portion away from the second strip conductor 210 is electrically connected or coupled to the first strip conductor 110. One of the first strip conductor 110 and the second strip conductor 210 may be connected to the feed portion 240, and the other may be connected to the ground portion 120.

[0053] For example, when the power supply section 240 is connected to the first strip conductor 110, the grounding section 120 is connected to the second strip conductor 210. When the power supply section 240 is connected to the second strip conductor 210, the grounding section 120 is connected to the first strip conductor 110. The power supply section 240 or the grounding section 120 is located between the two ends of the second strip conductor 210. Here, the power supply section 240 and the grounding section 120 can be a portion of the first strip conductor 110 or the second strip conductor 210, or they can be connection structures such as wires connected to the first strip conductor 110 or the second strip conductor 210.

[0054] In specific operation, when the grounding part 120 is connected to the first strip conductor 110 and the power supply part 240 is connected to the second strip conductor 210, when the frequency band of the radio frequency signal emitted by the radio frequency transceiver circuit can excite the resonant mode of the second strip conductor 210, the radio frequency signal is transmitted to the second strip conductor 210 through the power supply part 240, and the second strip conductor 210 radiates electromagnetic wave signals according to the radio frequency signal. Furthermore, when the electromagnetic wave signal received by the second strip conductor 210 can be converted into a radio frequency signal, the radio frequency signal is transmitted to the radio frequency transceiver circuit through the power supply part 240.

[0055] When the frequency band of the radio frequency signal emitted by the radio frequency transceiver circuit matches the resonant mode of the first strip conductor 110, the second strip conductor 210 transmits the radio frequency signal to the first strip conductor 110 through the end of the electrical connection portion away from the second strip conductor 210, thereby exciting the resonant mode of the in-line antenna 100. Furthermore, when the electromagnetic wave signal received by the first strip conductor 110 can be converted into a radio frequency signal, the radio frequency signal is transmitted to the feed section 240 through the second strip conductor 210, and then transmitted to the radio frequency transceiver circuit through the feed section 240.

[0056] In this scheme, the slotted antenna 200 can be electrically connected or coupled to the line antenna 100 through the electrical connection parts at both ends. Therefore, there is no need to set up other electrical connection structures or coupling structures to connect to the line antenna 100, which makes the antenna assembly structure simpler and the cost lower.

[0057] In the above embodiment, the first strip conductor 110 extends along its direction, which is the length direction of the linear antenna 100. Therefore, the dimension of the first strip conductor along its extension direction is the first dimension L1 mentioned above, and the dimension of the second strip conductor 210 along its extension direction is the second dimension L2.

[0058] This application discloses various combination structures of line antenna 100 and slot antenna 200. Of course, line antenna 100 and slot antenna 200 can also be other combination structures, which are not limited herein.

[0059] Please refer to Figure 3 and Figure 4In one specific embodiment, the electrical connection portion may include a first electrical connection portion 220 and a second electrical connection portion 230, which may be respectively disposed at both ends of the second strip conductor 210. The ends of the first electrical connection portion 220 and the second electrical connection portion 230 opposite to the second strip conductor 210 may be electrically connected to the first strip conductor 110; here, electrical connection refers to direct contact electrical connection. The first strip conductor 110, the first electrical connection portion 220, the second electrical connection portion 230, and the second strip conductor 210 form a cavity 310. In this scheme, the first strip conductor 110 covers the opening of the slot structure formed by the slot antenna 200. At this time, the linear antenna 100 and the slot antenna 200 are in contact, and the stacking thickness of the linear antenna 100 and the slot antenna 200 is small. Therefore, the size of the antenna assembly in the thickness direction can be set smaller, which is beneficial to the development of thinner and lighter electronic devices.

[0060] Please refer to Figure 15 and Figure 16 In another optional embodiment, the electrical connection portion may include a first electrical connection portion 220 and a second electrical connection portion 230, which may be respectively disposed at both ends of the second strip conductor 210. Both the first electrical connection portion 220 and the second electrical connection portion 230 have a first gap 320 with the first strip conductor 110, and both are coupled to the first strip conductor 110. In this scheme, the first strip conductor 110 is coupled to the first electrical connection portion 220 and the second electrical connection portion 230, facilitating the distribution of the line antenna 100 and the slot antenna 200 on different components, thereby enabling the combined assembly of the line antenna 100 and the slot antenna 200 when space is insufficient for a single component.

[0061] Please refer to Figure 9 In another optional embodiment, the electrical connection portion may include a first electrical connection portion 220, a second electrical connection portion 230, and a third strip conductor 250. The second strip conductor 210, the first electrical connection portion 220, the third strip conductor 250, and the second electrical connection portion 230 can be connected end-to-end to form a ring structure. A second gap 330 may exist between the third strip conductor 250 and the first strip conductor 110, and the third strip conductor 250 and the first strip conductor 110 can be coupled together. In this scheme, the slot antenna 200 has a ring structure, and the coupling connection between the third strip conductor 250 and the first strip conductor 110 increases the feeding area of ​​the line antenna 100 and the slot antenna 200, thus further improving the feeding performance of the line antenna 100 and the slot antenna 200. Simultaneously, the coupling connection also facilitates the distribution of the line antenna 100 and the slot antenna 200 on different components, thereby enabling the assembly of the line antenna 100 and the slot antenna 200 when space is insufficient for a single component.

[0062] In the antenna design of electronic devices, the impact of electromagnetic radiation on the human body must also be considered. The more energy of electromagnetic waves absorbed by the human body, the greater the impact of electromagnetic radiation on the human body. Therefore, the embodiments disclosed in this application, by setting up a composite antenna composed of a slotted antenna 200 and a wire antenna 100, enable the composite antenna of electronic devices to generate multiple resonant modes to achieve wideband coverage in environments with limited antenna arrangement, while also ensuring that multiple resonant modes meet the requirements for low SAR values, thereby reducing the impact of electromagnetic radiation on the human body.

[0063] In one optional embodiment, the antenna assembly disclosed in this application may have a first resonant mode and a second resonant mode. The first resonant mode may be the common-mode mode of the line antenna 100. The second resonant mode may be the differential-mode mode of the slot antenna 200.

[0064] In the above embodiments, the feed section 240 or ground section 120 may have a first connection point with the slot antenna 200, and the feed section 240 or ground section 120 may have a second connection point with the line antenna 100. Whether it is the common-mode mode of the line antenna 100 or the differential-mode mode of the slot antenna 200, the current generated is distributed in opposite directions on both sides of the first and second connection points. At this time, the magnetic fields at the first and second connection points are out of phase, and their amplitudes are roughly canceled out. Therefore, the magnetic field is mainly distributed on both sides of the first and second connection points, forming two SAR hotspots on both sides. At this time, the energy of the radiated electromagnetic waves is relatively dispersed, and the resonant SAR values ​​of the differential-mode mode of the slot antenna 200 and the common-mode mode of the line antenna 100 are relatively low.

[0065] It should be noted that the current intensity on both sides of the connection point between the power supply section 240 and the grounding section 120 and the line antenna 100 or the slot antenna 200 needs to be similar. Therefore, the connection point between the power supply section 240 or the grounding section 120 and the line antenna 100 or the slot antenna 200 needs to be located in the middle of the first strip conductor 110 or the second strip conductor 210.

[0066] To enable the antenna assembly to have better low SAR performance, in another optional embodiment, the slot antenna 200 has a first end 260 and a second end 270 along its length direction. The distance between the first connection point and the first end 260 can be a first distance L3, and the distance between the first connection point and the second end can be a second distance L4. The ratio of the first distance L3 to the second distance L4 can be greater than or equal to 0.8 and less than or equal to 1.2.

[0067] In this scheme, the distances between the first connection point and the two ends of the slot antenna 200 are not significantly different. Therefore, the slot antenna 200 has better compatibility with the connection point of the feed section 240 or the ground section 120. This results in a smaller difference in the current intensity on both sides of the connection point between the feed section 240 or the ground section 120 and the slot antenna 200, thus further meeting the requirements for low SAR performance of the antenna.

[0068] Preferably, the ratio of the first distance L3 to the second distance L4 can be equal to 1. In this case, the slot antenna 200 is centrally symmetrical about the feed part 240 or the ground part 120 and its connection point.

[0069] The first end 260 and the second end 270 of the aforementioned slot antenna 200 can be the two ends of the second strip conductor 210 along its extension direction.

[0070] In another optional embodiment, the wire antenna 100 has a third end 111 and a fourth end 112 along its length. The distance between the second connection point and the third end 111 can be a third distance L5, and the distance between the second connection point and the fourth end 112 can be a fourth distance L6. The ratio of the third distance L5 to the fourth distance L6 can be greater than or equal to 0.8 and less than or equal to 1.2.

[0071] In this scheme, the distances between the second connection point and the third end 111 and the fourth end 112 are not significantly different. Therefore, the linear antenna 100 has better symmetry with respect to the feed section 240 or the ground section 120 and its connection point. This results in a smaller difference in the current intensity on both sides of the connection point between the feed section 240 or the ground section 120 and the slot antenna 200, thus further meeting the requirements for low SAR performance of the antenna.

[0072] Preferably, the ratio of the third distance L5 to the fourth distance L6 can be equal to 1. In this case, the linear antenna 100 is centrally symmetrical about the feed section 240 or the ground section 120 and its connection point.

[0073] The third end 111 and the fourth end 112 of the aforementioned linear antenna 100 can be the two ends of the first strip conductor 110 along its extension direction.

[0074] In another alternative embodiment, the distance by which the third end 111 protrudes relative to the first end 260 can be a fifth distance L7. The distance by which the fourth end 112 protrudes relative to the second end 270 can be a sixth distance L8. The ratio of the fifth distance L7 to the sixth distance L8 can be greater than or equal to 0.8 and less than or equal to 1.2.

[0075] In this scheme, the protrusion distances at both ends of the line antenna 100 and the slot antenna 200 are not significantly different, thus making the overall symmetry performance of the line antenna 100 and the slot antenna 200 better, thereby further meeting the requirements of low SAR performance of the antenna.

[0076] Preferably, the ratio of the fifth distance L7 to the sixth distance L8 can be equal to 1. In this case, the linear antenna 100 and the slotted antenna 200 have a symmetrical structure.

[0077] In the above embodiments, the more symmetrical the structure composed of the line antenna 100 and the slot antenna 200, the lower its SAR value. Therefore, in another optional embodiment, the ratio of the first distance L3 to the second distance L4 can be equal to 1. The ratio of the third distance L5 to the fourth distance L6 can be equal to 1. The ratio of the fifth distance L7 to the sixth distance L8 can be equal to 1. In this scheme, the connection point between the feed section 240 or the ground section 120 and the line antenna 100 and the slot antenna 200 is a symmetrical point of the line antenna 100 and the slot antenna 200. Therefore, the line antenna 100 and the slot antenna 200 form a symmetrical image with respect to the feed section 240 or the ground section 120 and its connection point, thus further meeting the low SAR performance requirements of the antennas of electronic devices.

[0078] Based on the antenna assembly disclosed in the embodiments of this application, the embodiments of this application also disclose an electronic device, which includes the display module described in any of the embodiments above.

[0079] The electronic device disclosed in this application also includes a circuit board 410 for mounting electronic components, such as a central processing unit (CPU), a battery management unit, and a baseband processing unit. Furthermore, the circuit board 410 can be a rigid circuit board, a flexible circuit board, or a rigid-flex circuit board. The feed section 240 of the antenna assembly is electrically connected to the radio frequency transceiver circuit of the circuit board 410, and the ground section 120 is electrically connected to the ground plane of the circuit board 410.

[0080] In the scheme disclosed in this application, the linear antenna 100 and the slot antenna 200 correspond to different frequencies of the resonant modes, thus enabling the realization of multiple resonant modes on electronic devices, thereby meeting the needs of multiple communication frequency bands of electronic devices and increasing the application scenarios of electronic devices.

[0081] The electronic devices disclosed in this application can be smartphones, tablets, e-book readers, wearable devices such as smartwatches, video game consoles, etc. This application does not limit the specific types of electronic devices.

[0082] In the above embodiments, the electronic device may further include a back cover 420, a circuit board bracket 430, a screen bracket 440, and a display screen 450. The back cover 420 serves as the battery cover for the electronic device. The circuit board bracket 430 supports the circuit board 410, and the screen bracket 440 supports the display screen 450. The screen bracket 440 can also be connected to the back cover 420, and both the screen bracket 440 and the back cover 420 can form the housing of the electronic device. The back cover 420, circuit board bracket 430, circuit board 410, screen bracket 440, and display screen 450 can be stacked sequentially. The linear antenna 100 and the slotted antenna 200 can be disposed on at least one of the back cover 420 and the circuit board bracket 430.

[0083] In the above embodiments, the line antenna 100 and the slot antenna 200 can be formed on at least one of the back cover 420 and the circuit board support 430 using laser engraving technology. Of course, the line antenna 100 or the slot antenna 200 can also be formed in other ways, which are not limited herein.

[0084] In another alternative embodiment, the first strip conductor 110 and the second strip conductor 210 may be respectively disposed on both sides of the circuit board support 430, and at least a portion of the electrical connection portion is embedded within the circuit board support 430. For example, in the above embodiment, at least a portion of the first electrical connection portion 220 and the second electrical connection portion 230 are embedded between the circuit board support 430.

[0085] In this scheme, the first strip conductor 110 and the second strip conductor 210 are respectively disposed on both sides of the circuit board support 430, so that the first strip conductor 110 and the second strip conductor 210 are less likely to interfere with each other, thereby improving the performance of the antenna of the electronic device.

[0086] Please see Figure 8 , Figure 8 yes Figure 3 and Figure 4 The diagram shows the relationship between the reflection coefficient and frequency of the antenna assembly from 0.5 to 6 GHz. The antenna of the electronic device can generate two resonances, resonance 1 and resonance 2, from 0.5 to 6 GHz. Resonance 1 is the common-mode mode of the wire antenna, and its current distribution direction is as follows... Figure 6 As shown, Figure 6 The black solid arrow indicates the current distribution direction in the common-mode mode of the linear antenna 100. Resonance 2 represents the differential-mode mode of the slot antenna 200, and its current distribution direction is as follows... Figure 7 As shown, Figure 7 The direction of the current indicated by the black solid arrow is the current distribution direction in the differential mode of the slot antenna 200.

[0087] A SAR hotspot is defined as an area where the average SAR value is greater than or equal to 1.2 compared to the average SAR value of the surrounding area. In this case, the area is called a SAR hotspot. Alternatively, it can be described as an area where a maximum SAR value occurs. The area surrounding this maximum SAR value is then called a SAR hotspot. Table 1 below shows the data from this application. Figure 3 The table shows a comparison of SAR performance between the proposed scheme and the traditional IFA antenna scheme.

[0088] Table 1

[0089]

[0090] As shown in Table 1 above, the SAR values ​​of the antenna components disclosed in this application are 1.67 and 1.63 for resonance 1 and resonance 2, respectively, which are significantly lower than the SAR value of 4.19 for the IFA antenna, and have obvious low SAR characteristics.

[0091] Please see Figure 13 , Figure 13 yes Figure 9 and Figure 10 The diagram shows the relationship between the reflection coefficient and frequency of the antenna assembly in the 2 to 6 GHz range. The antenna assembly can generate two resonances, resonance 1 and resonance 2, in the 2 to 6 GHz range. Resonance 1 is the common-mode mode of the wire antenna 100. Figure 11 This is a schematic diagram of the current distribution in the common-mode mode of the linear antenna 100. Resonance 2 represents the differential-mode mode of the slot antenna 200. Figure 12 This is a schematic diagram of the current distribution in the differential mode of the slot antenna 200. Table 2 below shows the current distribution in this application. Figure 9 The table shows a comparison of SAR performance between the proposed scheme and the traditional IFA antenna scheme.

[0092] Table 2

[0093]

[0094] As shown in Table 2, after SAR value normalization, compared with the traditional IFA antenna, the SAR values ​​of the two resonant modes of the antenna component in this application are both less than one-quarter of the SAR values ​​of the IFA antenna, exhibiting significant low SAR characteristics.

[0095] Please see Figure 19 , Figure 19 yes Figure 15 and Figure 16 The diagram shows the relationship between the antenna's reflection coefficient and frequency from 2.5 to 6 GHz. The antenna assembly can generate two resonances, resonance 1 and resonance 2, from 2.5 to 6 GHz. Resonance 1 is the common-mode mode of the wire antenna 100. Figure 17 This is a schematic diagram of the current distribution in the common-mode mode of the linear antenna 100. Resonance 2 represents the differential-mode mode of the slot antenna 200. Figure 18 This is a schematic diagram of the current distribution in the differential mode of the slot antenna 200.

[0096] Table 3 below is a summary of this application. Figure 15 The table shows a comparison of SAR performance between the proposed scheme and the traditional IFA antenna scheme.

[0097] Table 3

[0098]

[0099]

[0100] As shown in Table 3, after SAR value normalization, compared with the traditional IFA antenna, the SAR values ​​of the two resonant modes of the antenna in this application are less than one-quarter of the SAR values ​​of the IFA antenna, exhibiting obvious low SAR characteristics.

[0101] To better illustrate that the connection points between the feed section 240 and the ground section 120 and the linear antenna 100 or the slotted antenna 200 in this application need to be located at the middle of the first strip conductor 110 or the second strip conductor 210, please refer to [link to relevant documentation]. Figures 21 to 25 .according to Figures 21 to 23 Therefore, the connection point between the feed section 240 and the second strip conductor 210 is offset to the left of the second strip conductor 210. The connection point between the ground section and the first strip conductor 110 is located in the middle of the first strip conductor. At this time, the feed ground of the antenna assembly is not offset. Please refer to... Figure 24 , Figure 24 yes Figure 21 The diagram shows the relationship between the reflection coefficient and frequency of the antenna assembly in the 3-6 GHz range. The antenna assembly can produce two resonances in the 3-6 GHz range, resonance 1 and resonance 2. Figure 22 As shown, resonance 1 represents the common-mode mode of the linear antenna 100. Since the grounding position is not biased, current flows back from the grounding position, thus forming a common-mode mode. Figure 23 As shown, in resonance 2, the current generated by the slot antenna 100 is clearly oriented to the left, and the differential mode of the slot antenna 200 is not formed. At this time, resonance 1 generates a double hot spot, while resonance 2 generates a single hot spot. Table 4 below shows the results of this application. Figure 21 The scheme shown is the same as Figure 5 The table shows a comparison of SAR performance for the proposed schemes.

[0102] Table 4

[0103]

[0104]

[0105] As shown in Table 4, compared with the case of "no feed offset and no ground offset", the normalized SAR of Resonator 1 is slightly higher, while the normalized SAR of Resonator 2 is significantly higher. The reasons for this phenomenon are as follows:

[0106] The mode of "feed biased but ground biased" resonance 1 is similar to the mode of "feed biased and ground biased" resonance 1, but the symmetry of the current distribution is relatively poor, so the magnetic field cancellation is relatively weak and the SAR value is slightly higher.

[0107] The mode of the "feed-off ground not biased" resonance 2 changes, there is no reverse current, that is, no magnetic field cancellation, the current is concentrated in the middle of the antenna structure, the SAR hotspot map is a single hotspot, and the SAR value is significantly higher.

[0108] 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 assembly, characterized by The antenna assembly comprises a feeding portion (240), a grounding portion (120), a wire antenna (100) and a slot antenna (200); The wire antenna (100) and the slot antenna (200) are electrically connected or coupled, one of the wire antenna (100) and the slot antenna (200) is connected to the feeding portion (240), and the other is connected to the grounding portion (120); the length of the slot antenna (200) in the orthographic projection of the wire antenna (100) is less than the length of the wire antenna (100); The antenna assembly has a first resonant mode and a second resonant mode, the first resonant mode is a common mode of the wire antenna (100), and the second resonant mode is a differential mode of the slot antenna (200).

2. The antenna assembly of claim 1, wherein, The wire antenna (100) comprises a first strip conductor (110), the slot antenna (200) comprises a second strip conductor (210) and an electrical connection portion, the electrical connection portion is electrically connected to both ends of the second strip conductor (210), the length of the second strip conductor (210) in the orthographic projection of the first strip conductor (110) is less than the length of the first strip conductor (110); the electrical connection portion is located between the first strip conductor (110) and the second strip conductor (210), one end of the electrical connection portion away from the second strip conductor (210) is electrically connected or coupled to the first strip conductor (110); one of the first strip conductor (110) and the second strip conductor (210) is connected to the feeding portion (240), and the other is connected to the grounding portion (120).

3. The antenna assembly of claim 2, wherein, The electrical connection portion comprises a first electrical connection portion (220) and a second electrical connection portion (230), the first electrical connection portion (220) and the second electrical connection portion (230) are respectively arranged at both ends of the second strip conductor (210), one end of the first electrical connection portion (220) and the second electrical connection portion (230) away from the second strip conductor (210) is electrically connected to the first strip conductor (110), and the first strip conductor (110), the first electrical connection portion (220), the second electrical connection portion (230) and the second strip conductor (210) form a cavity (310).

4. The antenna assembly of claim 2, wherein, The electrical connection portion comprises a first electrical connection portion (220) and a second electrical connection portion (230), the first electrical connection portion (220) and the second electrical connection portion (230) are respectively arranged at both ends of the second strip conductor (210), the first electrical connection portion (220) and the second electrical connection portion (230) are both provided with a first gap (320) from the first strip conductor (110), and the first electrical connection portion (220) and the second electrical connection portion (230) are both coupled to the first strip conductor (110). The electrical connection portion comprises a first electrical connection portion (220) and a second electrical connection portion (230), the first electrical connection portion (220) and the second electrical connection portion (230) are respectively arranged at both ends of the second strip conductor (210), the first electrical connection portion (220) and the second electrical connection portion (230) are both provided with a first gap (320) from the first strip conductor (110), and the first electrical connection portion (220) and the second electrical connection portion (230) are both coupled to the first strip conductor (110).

5. The antenna assembly of claim 2, wherein, The electric connection part comprises a first electric connection part (220), a second electric connection part (230) and a third strip conductor (250), the second strip conductor (210), the first electric connection part (220), the third strip conductor (250) and the second electric connection part (230) are sequentially connected in a ring structure, the third strip conductor (250) has a second gap (330) with the first strip conductor (110), and the third strip conductor (250) is coupled to the first strip conductor (110).

6. The antenna assembly of claim 1, wherein, The feeding part (240) or the grounding part (120) has a first connection point with the slot antenna (200), the slot antenna (200) has a first end (260) and a second end (270) along its length direction, the first connection point is a first distance (L3) away from the first end (260), the first connection point is a second distance (L4) away from the second end (270), the ratio of the first distance (L3) to the second distance (L4) is greater than or equal to 0.8 and less than or equal to 1.

2.

7. The antenna assembly of claim 1, wherein, The feeding part (240) or the grounding part (120) has a second connection point with the wire antenna (100), the wire antenna (100) has a third end (111) and a fourth end (112) along its length direction, the second connection point is a third distance (L5) away from the third end (111), the second connection point is a fourth distance (L6) away from the fourth end (112), the ratio of the third distance (L5) to the fourth distance (L6) is greater than or equal to 0.8 and less than or equal to 1.

2.

8. The antenna assembly of claim 1, wherein, The slot antenna (200) has a first end (260) and a second end (270) along its length direction, the wire antenna (100) has a third end (111) and a fourth end (112) along its length direction, the third end (111) protrudes a fifth distance (L7) relative to the first end (260), the fourth end (112) protrudes a sixth distance (L8) relative to the second end (270), the ratio of the fifth distance (L7) to the sixth distance (L8) is greater than or equal to 0.8 and less than or equal to 1.

2.

9. The antenna assembly of claim 1, wherein, The feeding part (240) or the grounding part (120) has a first connection point with the slot antenna (200), the slot antenna (200) has a first end (260) and a second end (270) along its length direction, the first connection point is a first distance (L3) away from the first end (260), the first connection point is a second distance (L4) away from the second end (270), the ratio of the first distance (L3) to the second distance (L4) is equal to 1. The feeding part (240) or the grounding part (120) has a second connection point with the wire antenna (100), the wire antenna (100) has a third end (111) and a fourth end (112) along its length direction, the second connection point is at a third distance (L5) from the third end (111), the second connection point is at a fourth distance (L6) from the fourth end (112), and the ratio of the third distance (L5) to the fourth distance (L6) is equal to 1. The third end (111) protrudes from the first end (260) by a fifth distance (L7), the fourth end (112) protrudes from the second end (270) by a sixth distance (L8), and the ratio of the fifth distance (L7) to the sixth distance (L8) is equal to 1.

10. The antenna assembly of claim 1, wherein, The length direction of the slot antenna (200) is parallel to the length direction of the wire antenna (100).

11. An electronic device, comprising: The electronic device further comprises a back cover (420), a circuit board support (430), a screen support (440), and a display screen (450), the back cover (420), the circuit board support (430), the circuit board (410), the screen support (440), and the display screen (450) are stacked in sequence, and the wire antenna (100) and the slot antenna (200) are arranged on at least one of the back cover (420) and the circuit board support (430).

12. The electronic device of claim 11, wherein, The wire antenna (100) comprises a first strip-shaped conductor (110), the slot antenna (200) comprises a second strip-shaped conductor (210) and an electrical connection part, the first strip-shaped conductor (110) and the second strip-shaped conductor (210) are arranged on two sides of the circuit board support (430) respectively, and at least part of the electrical connection part is embedded in the circuit board support (430). ​

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