Antenna module, middle frame assembly and electronic device
By designing antenna operating modes with different radiation efficiencies, the problem of antenna mismatch with usage scenarios was solved, and excellent communication performance was achieved in different scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD
- Filing Date
- 2022-06-21
- Publication Date
- 2026-06-26
AI Technical Summary
The existing antenna is not compatible with the usage scenario, which prevents the communication performance from being fully utilized.
Design an antenna module comprising a first antenna and a second antenna. By setting a first feed point electrically connected to a power supply, the first antenna generates first and second resonant modes under excitation, and the second antenna generates a third resonant mode under coupled feeding, forming two operating modes with different radiation efficiencies to match different application scenarios.
In different usage scenarios, the antenna module can select the working mode that best matches the scenario, thereby improving communication performance.
Smart Images
Figure CN117317568B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of communication technology, specifically to an antenna module, a mid-frame assembly, and an electronic device. Background Technology
[0002] With the continuous development of electronic devices, they have become indispensable entertainment and social tools in people's daily lives, and people's demands for these devices are also increasing. Taking mobile phones as an example, current mobile phones are generally equipped with antennas to transmit and receive electromagnetic wave signals in corresponding frequency bands to realize the phone's wireless communication function. However, the antennas in related technologies do not have a high degree of matching with the usage scenarios, resulting in the antenna's communication performance not being fully utilized. Summary of the Invention
[0003] This application provides an antenna module having a first operating mode and a second operating mode with different radiation efficiencies, and including a first antenna and a second antenna; the first antenna is provided with a first feed point electrically connected to a power supply; a first end of the first antenna is grounded, and a second end of the first antenna and a third end of the second antenna are spaced apart and coupled to each other; wherein, when the antenna module is in the first operating mode, the first antenna is used to generate a first resonant mode and a second resonant mode, and the first resonant mode and the second resonant mode together support the transmission and reception of electromagnetic wave signals in a first frequency band; when the antenna module is in the second operating mode, the first antenna is used to generate the first resonant mode, and the second antenna is used to generate a third resonant mode under the coupled feed excitation of the first antenna, and the first resonant mode and the third resonant mode together support the transmission and reception of electromagnetic wave signals in the first frequency band.
[0004] Another embodiment of this application provides a mid-frame assembly, which includes: the aforementioned antenna module, a substrate, and a frame; the substrate is provided with a ground plane and a power supply; the first power supply point is electrically connected to the power supply, and the first end of the first antenna is electrically connected to the ground plane; the frame surrounds the periphery of the substrate, and the first antenna and the second antenna are disposed on the frame.
[0005] This application embodiment also provides an electronic device, the electronic device including: the above-described mid-frame assembly, display screen and back cover; the display screen is disposed on one side of the frame, and the back cover is disposed on the other opposite side of the frame.
[0006] The antenna module provided in this application embodiment has a first feeding point electrically connected to a power supply on the first antenna. The first antenna can generate a first resonant mode and a second resonant mode under the excitation signal of the power supply. This allows the antenna module to support the transmission and reception of electromagnetic wave signals in a first frequency band using both the first and second resonant modes, forming a first operating mode. Furthermore, a second antenna is provided at a distance from and coupled to the first antenna. The second antenna can generate a third resonant mode under the coupled power supply excitation of the first antenna. This allows the antenna module to support the transmission and reception of electromagnetic wave signals in the first frequency band using both the first and third resonant modes, forming a second operating mode with different radiation efficiencies than the first operating mode. Thus, within the same frequency band, the antenna module can have a first operating mode and a second operating mode with different radiation efficiencies. It can select the operating mode with a higher degree of matching to the usage scenario from the first and second operating modes, allowing the communication performance of the antenna module to be better utilized in different usage scenarios. Attached Figure Description
[0007] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0008] Figure 1 This is a schematic diagram of the structure of the electronic device 10 provided in the embodiments of this application;
[0009] Figure 2 yes Figure 1 A structural diagram of the middle frame component 300;
[0010] Figure 3 yes Figure 2 A schematic diagram of the connection structure between the center feed power supply 312 and the antenna module 330;
[0011] Figure 4 yes Figure 3 A schematic diagram of the structure of the first feed power supply 3121 and the first antenna 331;
[0012] Figure 5 yes Figure 4 A schematic diagram of the structure of the first tuning circuit 3312;
[0013] Figure 6 yes Figure 3 A schematic diagram of the structure of the second feed power supply 3122 and the second antenna 332;
[0014] Figure 7 yes Figure 6A schematic diagram of the structure of the second tuning circuit 3322;
[0015] Figure 8 yes Figure 6 A schematic diagram of the 3323 intermediate filter circuit;
[0016] Figure 9 yes Figure 3 Return loss curve of antenna module 330 operating in the first frequency band;
[0017] Figure 10 yes Figure 3 The overall efficiency curve of the antenna module 330 operating in the first frequency band;
[0018] Figure 11 yes Figure 3 Return loss curve of antenna module 330 operating in the second frequency band;
[0019] Figure 12 yes Figure 3 The overall efficiency curve of the antenna module 330 operating in the second frequency band. Detailed Implementation
[0020] As used herein, “electronic device” (or simply “terminal”) includes, but is not limited to, means configured to receive / transmit communication signals via a wired connection (such as via a Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital Cable, Direct Cable Connection, and / or another data connection / network) and / or via a wireless interface (e.g., for cellular networks, Wireless Local Area Networks (WLANs), Digital Television Networks such as DVB-H networks, Satellite Networks, AM-FM Broadcast Transmitters, and / or another communication terminal). A communication terminal configured to communicate via a wireless interface may be referred to as a “wireless communication terminal,” a “wireless terminal,” or a “mobile terminal.” Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that may combine cellular radiotelephone with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, notepads, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or handheld receivers or other electronic devices that include radiotelephone transceivers. A mobile phone is an electronic device equipped with a cellular communication module.
[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.
[0022] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0023] Please see Figures 1 to 2 , Figure 1 This is a schematic diagram of the structure of the electronic device 10 provided in the embodiments of this application. Figure 2 yes Figure 1 A structural diagram of the middle frame component 300.
[0024] The electronic device 10 provided in this application embodiment can specifically be a mobile phone, tablet computer, laptop computer, or smartwatch, or other device with wireless communication capabilities. The following example uses a mobile phone as the electronic device 10 for illustration. Figures 1 to 2 As shown, the electronic device 10 may include a display screen 100, a back cover 200, and a mid-frame assembly 300. The display screen 100 may be disposed on one side of the mid-frame assembly 300, and the back cover 200 may be disposed on the opposite side of the mid-frame assembly 300. The mid-frame assembly 300 can also be used to implement the wireless communication function of the electronic device 10, and the mid-frame assembly 300 may have two operating modes with different radiation efficiencies. It can select the operating mode with a higher degree of matching with the usage scenario, so that the communication performance of the electronic device 10 can be better utilized in different usage scenarios. In the embodiments of this application, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.
[0025] Specifically, the display screen 100 can be disposed on one side of the mid-frame assembly 300, and can be used to provide image display function for the electronic device 10. The display screen 100 can include a display panel, a touch panel, and a transparent cover plate stacked sequentially. The display panel can be a Liquid Crystal Display (LCD) panel or an Organic Light-Emitting Diode (OLED) panel, which can be used to display images. The touch panel can respond to user touch operations and convert the corresponding touch operations into electrical signals to trigger the corresponding functions of the electronic device 10 to achieve human-computer interaction. The transparent cover plate can be used to protect the display panel and the touch panel, and its material can be a rigid material such as glass, or a flexible material such as polyimide (PI) or colorless polyimide (CPI).
[0026] The back cover 200 can be installed on the opposite side of the mid-frame assembly 300, and the display screen 100, the back cover 200, and the mid-frame assembly 300 can together form a receiving cavity to accommodate functional components required by the electronic device 10, such as a battery, camera, circuit board, and fingerprint recognition sensor. The back cover 200 can be made of glass, metal, or plastic. Since the back cover 200 is generally exposed to the external environment, a functional coating can be applied to its outer surface to improve its wear resistance, corrosion resistance, and scratch resistance.
[0027] The mid-frame assembly 300, besides supporting the display screen 100 and the back cover 200, can also be used to realize the wireless communication function of the electronic device 10. For example... Figure 2 As shown, the mid-frame assembly 300 may include a substrate 310, a frame 320, and an antenna module 330. The substrate 310 can support functional devices within the cavity. The frame 320 surrounds the periphery of the substrate 310, with one side connected to the display screen 100 and the opposite side connected to the rear cover 200. The antenna module 330 can be disposed on the frame 320 and can be used to realize the wireless communication function of the electronic device 10. In this embodiment, the antenna module 330 can have two operating modes with different radiation efficiencies. It can select the operating mode with a higher degree of matching with the usage scenario, so that the communication performance of the electronic device 10 can be better utilized in different usage scenarios.
[0028] Specifically, the substrate 310 can be made of a conductive metal, and a ground plane 311 and a power supply 312 can be disposed on the substrate 310. The ground plane 311 can be electrically connected to the antenna module 330 for grounding, and can also be electrically connected to other circuit structures in the electronic device 10 that require grounding. The power supply 312 can be electrically connected to the antenna module 330 and can be used to emit electrical signals to excite the antenna module 330 to resonate and transmit and receive electromagnetic wave signals, thereby realizing the wireless communication function of the electronic device 10. Simultaneously, the power supply 312 can include a first power supply 3121 and a second power supply 3122, where the first power supply 3121 can be a mid-to-high frequency power supply, and the second power supply 3122 can be a low-frequency power supply, enabling the antenna module 330 to simultaneously support the transmission and reception of electromagnetic wave signals in both low-frequency and mid-to-high frequency bands. In this embodiment, the mid-to-high frequency band can be 1710MHz-2690MHz, and the low-frequency band can be 700MHz-960MHz.
[0029] Optionally, the substrate 310 can also be made of glass, ceramic, or rigid plastic, or a combination of metal and rigid plastic. Meanwhile, the ground plane 311 and the power supply 312 can also be disposed on the circuit board within the receiving cavity, and are not limited to being disposed on the substrate 310. Furthermore, the first power supply 3121 is not limited to a mid-to-high frequency power supply, and the second power supply 3122 is not limited to a low-frequency power supply; their specific types can be adjusted according to design requirements, and this embodiment does not impose any limitations on this.
[0030] The frame 320 can also be made of a conductive metal, and it and the substrate 310 can be an integral structure, formed together using processes such as stamping. For example... Figure 2 As shown, the frame 320 can surround the periphery of the substrate 310, and the frame 320 can include a first frame 321, a second frame 322, a third frame 323, and a fourth frame 324 connected end to end. The first frame 321, the second frame 322, the third frame 323, and the fourth frame 324 can surround the periphery of the substrate 310 and together with the substrate 310 form a corresponding open structure, allowing the display screen 100 and the back cover 200 to be respectively installed on opposite sides of the substrate 310, forming a receiving cavity together with the mid-frame assembly 300. Simultaneously, the first frame 321 and the third frame 323 can be arranged opposite each other, and the second frame 322 and the fourth frame 324 can be arranged opposite each other, forming a rectangle to match the shape of the electronic device 10. In addition, the corners where the first border 321, the second border 322, the third border 323 and the fourth border 324 meet can also be rounded.
[0031] Alternatively, the material of the frame 320 may not be limited to conductive metal; it may also be glass, ceramic, or rigid plastic, or a combination of rigid plastic and metal. This embodiment does not limit this.
[0032] The terms "first," "second," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature.
[0033] Please combine Figure 2 See Figure 3 , Figure 3 yes Figure 2 A schematic diagram of the connection structure between the center feed power supply 312 and the antenna module 330.
[0034] like Figures 2 to 3 As shown, the antenna module 330 may include a first antenna 331 and a second antenna 332. The first antenna 331 may be located at the corner where the first frame 321 and the second frame 322 meet, and the second antenna 332 may be located at the corner where the first frame 321 and the fourth frame 324 meet. Simultaneously, the second end a of the first antenna 331 on the first frame 321 may be spaced apart from the third end b of the second antenna 332 on the first frame 321, forming a first gap 301 between the first antenna 331 and the second antenna 332. The width of the first gap 301 may be less than a preset value (e.g., 5mm), allowing the first antenna 331 and the second antenna 332 to couple with each other. Furthermore, the first end c of the first antenna 331 on the second frame 322 may be electrically connected to a ground plane 311 for grounding, and the fourth end d of the second antenna 332 on the fourth frame 324 may remain open, forming a second gap 302 with the fourth frame 324. In this embodiment, the first antenna 331 can be electrically connected to the first feed power supply 3121, and the second antenna 332 can be electrically connected to the second feed power supply 3122. The first antenna 331 and the second antenna 332 can resonate under the excitation of the electrical signals of the first feed power supply 3121 and the second feed power supply 3122 to support the transmission and reception of electromagnetic wave signals in the mid-to-high frequency band and the low frequency band.
[0035] It is understandable that the aforementioned "coupling" means that an electric field can be generated between the first antenna 331 and the second antenna 332, and the electrical signal on the first antenna 331 can be transmitted to the second antenna 332 through the electric field, and the electrical signal on the second antenna 332 can also be transmitted to the first antenna 331 through the electric field, so that the first antenna 331 and the second antenna 332 can also achieve electrical signal conduction even when they are disconnected.
[0036] Specifically, the antenna module 330 can have a first operating mode and a second operating mode. When the antenna module 330 is in the first operating mode, the first antenna 331 can generate a first resonant mode and a second resonant mode, which together support the transmission and reception of electromagnetic wave signals in a first frequency band. When the antenna module 330 is in the second operating mode, the first antenna 331 can generate a first resonant mode, and the second antenna 332 can generate a third resonant mode under the coupled feeding excitation of the first antenna 331. The first and third resonant modes together support the transmission and reception of electromagnetic wave signals in the first frequency band. Thus, since the resonant modes generated by the antenna module 330 in the first and second operating modes are different, the antenna module 330 can have different radiation efficiencies in the first and second operating modes. Within the same frequency band, the antenna module 330 can select the operating mode with a higher degree of matching to the usage scenario from the first and second operating modes, allowing the communication performance of the antenna module 330 to be better utilized in different usage scenarios.
[0037] Furthermore, when the antenna module 330 is in the first operating mode, the second antenna 332 can also generate a fourth resonant mode under the excitation of the second feed power supply 3122, and the fourth resonant mode can support the transmission and reception of electromagnetic wave signals in the second frequency band. When the antenna module 330 is in the second operating mode, in addition to generating a third resonant mode under the coupling feed of the first antenna 331, the second antenna 332 can also generate a fourth resonant mode under the excitation of the second feed power supply 3122 to support the transmission and reception of electromagnetic wave signals in the second frequency band. In both the first and second operating modes, the antenna module 330 can support the transmission and reception of electromagnetic wave signals in the first or second frequency band independently, or it can support the transmission and reception of electromagnetic wave signals in both the first and second frequency bands simultaneously. For example, when the antenna module 330 is in the first operating mode, both the first antenna 331 and the second antenna 332 can be in operation to generate the first resonant mode, the second resonant mode, and the fourth resonant mode to jointly support the transmission and reception of electromagnetic wave signals in the first and second frequency bands. When the antenna module 330 is in the second working mode, both the first antenna 331 and the second antenna 332 can be in working state. The first antenna 331 can generate only the first resonant mode, while the second antenna 332 can generate the third resonant mode and the fourth resonant mode, so as to use the first resonant mode, the third resonant mode and the fourth resonant mode to jointly support the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band.
[0038] The first frequency band can be the aforementioned mid-to-high frequency band, and the second frequency band can be the aforementioned low frequency band. The first frequency band may further include a first sub-band and a second sub-band, and the first sub-band may include at least one of the B1 and B3 frequency bands, while the second sub-band may include the B41 frequency band. The second frequency band may include at least one of the B5, B8, B28A, and B28B frequency bands. Simultaneously, the first resonant mode can support the transmission and reception of electromagnetic wave signals in the first sub-band, the second resonant mode can support the transmission and reception of electromagnetic wave signals in the second sub-band, and the third resonant mode can also support the transmission and reception of electromagnetic wave signals in the second sub-band. Thus, in the first operating mode, the antenna module 330 can support the transmission and reception of electromagnetic wave signals in the B1, B3, and B41 frequency bands using only the first and second resonant modes generated by the first antenna 331. In the second operating mode, the antenna module 330 can simultaneously utilize the first antenna 331 and the second antenna 332 to generate a first resonant mode and a third resonant mode to jointly support the transmission and reception of electromagnetic wave signals in the B1, B3, and B41 frequency bands.
[0039] Optionally, the first frequency band may also include both mid-high frequency and ultra-high frequency (3300MHz-5000MHz) bands, allowing the first frequency band to have multiple different sub-bands in addition to the first and second sub-bands, to support the transmission and reception of electromagnetic wave signals in bands such as WIFI 2.4G, N78, and N79. The transmission and reception of electromagnetic wave signals in multiple different sub-bands can be supported by resonance generated by the first antenna 331, or by resonance generated by the second antenna 332 under the feed coupling excitation of the first antenna 331; this embodiment does not limit this. In the description of this application, "multiple" means at least two, such as two, three, or four, unless otherwise explicitly specified.
[0040] Please see Figures 4 to 5 , Figure 4 yes Figure 3 A schematic diagram of the structure of the first feed power supply 3121 and the first antenna 331. Figure 5 yes Figure 4 A schematic diagram of the structure of the first tuning circuit 3312.
[0041] like Figures 4 to 5As shown, the first antenna 331 may include a first stub 3311 and a first tuning circuit 3312. The first stub 3311 may be disposed on a first frame 321 and a second frame 322, with one end of the first stub 3311 on the first frame 321 being the second end a of the first antenna 331, and the other end of the first stub 3311 on the second frame 322 being the first end c of the first antenna 331. Simultaneously, the first stub 3311 may have a first feed point e for electrical connection to a first feed power supply 3121, and can generate a first resonant mode and a second resonant mode under the excitation of the electrical signal from the first feed power supply 3121. The first feed power supply 3121 can be electrically connected to the first feed point e through the first tuning circuit 3312, and the first tuning circuit 3312 can not only be used to tune the first and second resonant modes generated on the first stub 3311 and the third resonant mode generated on the second antenna 332, but also to remove interference between the first stub 3311 and the second antenna 332.
[0042] Specifically, the first branch 3311 may include a first sub-branch 33111 and a second sub-branch 33112 that are connected, and the extension directions of the first sub-branch 33111 and the second sub-branch 33112 may intersect. The first sub-branch 33111 may be disposed on the first frame 321, and the second sub-branch 33112 may be disposed on the second frame 322. Simultaneously, a first feed point e may be disposed on the first sub-branch 33111, and the end of the first sub-branch 33111 away from the second sub-branch 33112 may be the aforementioned second end a. The end of the second sub-branch 33112 away from the first sub-branch 33111 may be the aforementioned first end c. Optionally, the extension directions of the first sub-branch 33111 and the second sub-branch 33112 may also be perpendicular.
[0043] The first tuning circuit 3312 can be electrically connected to the first feed point e and the first feed power supply 3121 respectively, and the first tuning circuit 3312 can also be electrically connected to the ground plane 311 for grounding. It can be used to tune the first resonant mode, the second resonant mode and the third resonant mode, and to remove interference between the first antenna 331 and the second antenna 332. Figure 5 As shown, the first tuning circuit 3312 can be composed of a switch control circuit, an adjustable capacitor (unit pF), and an adjustable inductor (unit NH). By setting the parameters of the capacitor, inductor, and resistor, and by turning the switch off, the first tuning circuit 3312 can have frequency selection and filtering functions. The specific principle of the first tuning circuit 3312 can be found in existing technology. Figure 5The circuit structure of the first tuning circuit 3312 shown and the specific values of its capacitor and inductor are only one of the embodiments that can be used in this application. Its circuit structure and the specific values of its capacitor and inductor can also be adjusted according to design requirements. This embodiment does not limit this.
[0044] Please see Figures 6 to 8 , Figure 6 yes Figure 3 A schematic diagram of the structure of the second feed power supply 3122 and the second antenna 332. Figure 7 yes Figure 6 A schematic diagram of the structure of the second tuning circuit 3322. Figure 8 yes Figure 6 A schematic diagram of the 3323 filter circuit.
[0045] like Figures 6 to 8 As shown, the second antenna 332 may include: a second stub 3321, a second tuning circuit 3322, a filter circuit 3323, and a filter capacitor 3324. The second stub 3321 can be disposed on the first frame 321 and the fourth frame 324, with one end of the second stub 3321 on the first frame 321 being the third end b of the aforementioned second antenna 332, and the other end of the second stub 3321 on the fourth frame 324 being the fourth end d of the aforementioned second antenna 332. Simultaneously, the second stub 3321 may be provided with a second feed point f for electrical connection to the second power supply 3122, and a return point g for electrical connection to the ground plane 311. The second stub 3321 can generate a fourth resonant mode not only under the excitation of the electrical signal from the second power supply 3122, but also under the coupled feed excitation of the first stub 3311. The second tuning circuit 3322 can be electrically connected to the second branch 3321. It can not only tune the fourth resonant mode generated on the second branch 3321, but also cooperate with the first tuning circuit 3312 to remove interference between the first branch 3311 and the second branch 3321. The second power supply 3122 can be electrically connected to the second power supply point f through the filter circuit 3323. One end of the filter capacitor 3324 can be electrically connected to the return point g, and the other end can be electrically connected to the grounding ground 311 for grounding. Both the filter circuit 3323 and the filter capacitor 3324 can be used to remove high-frequency interference caused by the first branch 3311.
[0046] The second branch 3321 may include a third sub-branch 33211 and a fourth sub-branch 33212 that are connected, and the extension directions of the third sub-branch 33211 and the fourth sub-branch 33212 may intersect. The third sub-branch 33211 may be disposed on the first frame 321, and the fourth sub-branch 33212 may be disposed on the fourth frame 324. Simultaneously, a second feed point f may be disposed on the third sub-branch 33211, and a return point g may be disposed on the fourth sub-branch 33212. Furthermore, the end of the third sub-branch 33211 away from the fourth sub-branch 33212 may be the aforementioned third end b. The end of the fourth sub-branch 33212 away from the third sub-branch 33211 may be the aforementioned fourth end d. Optionally, the extension directions of the third sub-branch 33211 and the fourth sub-branch 33212 may also be perpendicular.
[0047] The second tuning circuit 3322 can be electrically connected to the third sub-segment 33211 located between the third terminal b and the second feed point f of the third sub-segment 33211, and the second tuning circuit 3322 can also be electrically connected to the ground plane 311 for grounding. It can be used to tune the fourth resonant mode and remove interference between the first antenna 331 and the second antenna 332 by switching. Figure 7 As shown, the second tuning circuit 3322 can be composed of a switch control circuit, an adjustable capacitor, and an adjustable inductor. By setting the parameters of the capacitor, inductor, and resistor, and by turning the switch on and off, the second tuning circuit 3322 can have frequency selection and filtering functions. The specific principle of the second tuning circuit 3322 can be found in existing technology. Figure 7 The circuit structure of the second tuning circuit 3322 shown and the specific values of its capacitor and inductor are only one of the embodiments that can be used in this application. Its circuit structure and the specific values of its capacitor and inductor can also be adjusted according to design requirements. This embodiment does not limit this.
[0048] The filter circuit 3323 can be electrically connected to the second feed point f and the second feed power supply 3122, respectively. For example... Figure 8 As shown, the filter circuit 3323 can be composed of capacitors and inductors, forming a band-stop circuit to remove high-frequency interference between the first branch 3311 and the second branch 3321. One end of the filter capacitor 3324 can be electrically connected to the return ground point g, and the other end can be electrically connected to the ground plane 311 for grounding. It can be used to realize low-frequency large capacitor return to ground and cooperate with the second tuning circuit 3322 to realize the switching of the fourth resonant mode. It is understood that... Figure 8 The filter circuit 3323 shown is only one of the embodiments that can be used in this application. The circuit structure and specific values of capacitors and inductors of the filter circuit 3323 can also be adjusted according to design requirements. This embodiment does not limit this.
[0049] Optionally, the first resonant mode can be a 1 / 4 wavelength mode between the first terminal c and the second terminal a, and the second resonant mode can be a 1 / 4 wavelength mode between the first terminal c and the second terminal a. The third resonant mode can be a double wavelength mode between the third terminal b and the fourth terminal d, and the fourth resonant mode can be a 1 / 4 wavelength mode between the third terminal b and the return point g. The first resonant mode can be generated by an electrical signal excitation from the first feed power supply 3121 coupled to the first feed point e through a capacitor and inductor connected in series on the first tuning circuit 3312, while the second resonant mode can be generated by an electrical signal excitation from the first feed power supply 3121 directly fed to the first feed point e through a small inductor on the first tuning circuit 3312 that is 0 ohms (the resistance of the capacitor and inductor connected in series) or switched by a switch.
[0050] Please see Figures 9 to 10 , Figure 9 yes Figure 3 Return loss curve of antenna module 330 operating in the first frequency band. Figure 10 yes Figure 3 The overall efficiency curve of the antenna module 330 operating in the first frequency band.
[0051] Figure 9 Curve L1 represents the return loss curve for the antenna module 330 in its first operating mode, supporting electromagnetic wave signal transmission and reception in the 1710MHz-2690MHz frequency band (including bands B1, B3, and B41). Curve L2 represents the return loss curve for the antenna module 330 in its second operating mode, supporting electromagnetic wave signal transmission and reception in the 1710MHz-2690MHz frequency band (including bands B1, B3, and B41). Curve L3 represents the return loss curve for the antenna module 330 in its second operating mode, supporting electromagnetic wave signal transmission and reception in the 1920MHz-2690MHz frequency band (including bands B1 and B41).
[0052] Figure 10 Curve L4 represents the overall efficiency of antenna module 330 in its first operating mode, supporting electromagnetic wave signal transmission and reception in the 1710MHz-2690MHz frequency band. Curve L5 represents the overall efficiency of antenna module 330 in its second operating mode, supporting electromagnetic wave signal transmission and reception in the 1710MHz-2690MHz frequency band. Curve L6 represents the overall efficiency of antenna module 330 in its second operating mode, supporting electromagnetic wave signal transmission and reception in the 1920MHz-2690MHz frequency band. Figures 9 to 10 As can be seen, the antenna module 330 provided in this application embodiment can meet the design expectations and conforms to the relevant standards for antenna design.
[0053] Table 1 shows the radiation efficiency of the antenna module 330 in this embodiment when it supports the transmission and reception of electromagnetic wave signals in the first frequency band under different usage scenarios.
[0054] Table 1
[0055]
[0056]
[0057] In Table 1, "Free" refers to the usage scenario where the electronic device 10 is placed in free space, "HL" refers to the usage scenario where the electronic device 10 is held by the user's left hand, "HR" refers to the usage scenario where the electronic device 10 is held by the user's right hand, "BHHL" refers to the usage scenario where the electronic device 10 is held by the user's head and left hand, and "BHHR" refers to the usage scenario where the electronic device 10 is held by the user's head and right hand. In Table 1, "S1" represents the antenna module 330 in the first operating mode, and "S2" represents the antenna module 330 in the second operating mode. As can be seen from Table 1, in the Free usage scenario, the radiation efficiency of the antenna module 330 in the B41 band in the first operating mode is 0.8 dB lower than that in the second operating mode. In the BHHL and BHHR usage scenarios, the radiation efficiency of the antenna module 330 in the B41 band in the first operating mode is approximately 2-3 dB higher than that in the second operating mode. It is evident that the first and second operating modes of the antenna module 330 can have different radiation efficiencies in the B41 frequency band. The antenna module 330 can utilize the difference in radiation efficiency between the first and second operating modes to select the operating mode that best matches the current usage scenario, thereby enabling the communication performance of the antenna module 330 to be better utilized.
[0058] Specifically, under the premise of meeting SAR standards, when the electronic device 10 is in a Free usage scenario, the antenna module 330 operates in the second working mode, enabling it to achieve high radiation efficiency in the B41 frequency band. When the electronic device 10 is in a BHHL or BHHR usage scenario, the antenna module 330 can operate in the first working mode, also achieving high radiation efficiency in the B41 frequency band. Thus, the antenna module 330 maintains high radiation efficiency in different usage scenarios, allowing its communication performance to be better utilized. It is understood that the selection of the first and second working modes of the antenna module 330 can be adjusted according to design requirements and usage scenario needs, and is not limited to the aforementioned selection scheme; this embodiment does not impose such limitations.
[0059] Please see Figures 11 to 12 , Figure 11 yes Figure 3 Return loss curve of antenna module 330 operating in the second frequency band. Figure 12 yes Figure 3 The overall efficiency curve of the antenna module 330 operating in the second frequency band.
[0060] Figure 11 Curve M1 represents the return loss curve for transmitting and receiving electromagnetic wave signals in the 700MHz-780MHz frequency band (B28A band) supported by antenna module 330; curve M2 represents the return loss curve for transmitting and receiving electromagnetic wave signals in the 720MHz-800MHz frequency band (B28B band) supported by antenna module 330; curve M3 represents the return loss curve for transmitting and receiving electromagnetic wave signals in the 824MHz-894MHz frequency band (B5 band) supported by antenna module 330; and curve M4 represents the return loss curve for transmitting and receiving electromagnetic wave signals in the 880MHz-960MHz frequency band (B8 band) supported by antenna module 330.
[0061] Figure 12 Curve M5 represents the overall efficiency of antenna module 330 when transmitting and receiving electromagnetic wave signals in the 700MHz-780MHz frequency band; curve M6 represents the overall efficiency when transmitting and receiving electromagnetic wave signals in the 720MHz-800MHz frequency band; curve M7 represents the overall efficiency when transmitting and receiving electromagnetic wave signals in the 824MHz-894MHz frequency band; and curve M8 represents the overall efficiency when transmitting and receiving electromagnetic wave signals in the 880MHz-960MHz frequency band. Figures 11 to 12 As can be seen, the antenna module 330 provided in this application embodiment can meet the design expectations and conforms to the relevant standards for antenna design.
[0062] Table 2 shows the radiation efficiency of antenna module 330 in different usage scenarios when it only supports the transmission and reception of electromagnetic wave signals in the second frequency band.
[0063] Table 2
[0064] frequency band Free HL HR BHHL BHHR B28A -6.3db -8.1db -10.5db -10.3db -12.8db B28B -6.4db -8.2db -10.3db -10.3db -12.6db B5 -6.1db -9db -9.6db -10.9db -12.1db B8 -6.1db -9.5db -9.5db -11.4db -12db
[0065] The antenna module 330 provided in this embodiment of the application has a first feed point e electrically connected to a power supply 312 on a first antenna 331. The first antenna 331 can generate a first resonant mode and a second resonant mode under the excitation signal of the power supply 312. This allows the antenna module 330 to support the transmission and reception of electromagnetic wave signals in a first frequency band using both the first and second resonant modes, forming a first operating mode. Furthermore, a second antenna 332 is provided at an interval from and coupled to the first antenna 331. The second antenna 332 can generate a third resonant mode under the coupled power supply excitation of the first antenna 331. This allows the antenna module 330 to support the transmission and reception of electromagnetic wave signals in the first frequency band using both the second and third resonant modes, forming a second operating mode with different radiation efficiencies than the first operating mode. Thus, within the same frequency band, the antenna module 330 can have a first operating mode and a second operating mode with different radiation efficiencies. It can select the operating mode with a higher degree of matching with the usage scenario from the first and second operating modes, allowing the communication performance of the antenna module 330 to be better utilized in different usage scenarios.
[0066] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.
Claims
1. An antenna module, characterized in that, The antenna module has a first operating mode and a second operating mode with different radiation efficiencies, and includes a first antenna and a second antenna. The first antenna is provided with a first feed point electrically connected to the power supply; the first end of the first antenna is grounded, and the second end of the first antenna and the third end of the second antenna are spaced apart and coupled to each other; wherein, When the antenna module is in the first working mode, the first antenna is used to generate a first resonant mode and a second resonant mode, and the first resonant mode and the second resonant mode together support the transmission and reception of electromagnetic wave signals in the first frequency band. When the antenna module is in the second operating mode, the first antenna is used to generate the first resonant mode, and the second antenna is used to generate the third resonant mode under the coupled feeding excitation of the first antenna. The first resonant mode and the third resonant mode together support the transmission and reception of electromagnetic wave signals in the first frequency band.
2. The antenna module according to claim 1, characterized in that, The first resonant mode is generated by an electrical signal coupled from the power supply to the first power supply point; the second resonant mode is generated by an electrical signal directly fed from the power supply to the first power supply point.
3. The antenna module according to claim 1, characterized in that, The second antenna also includes a return point and a second feed point connected to the power supply, with the return point located between the second feed point and the fourth terminal of the second antenna; the second antenna is used to generate a fourth resonant mode, and the fourth resonant mode supports the transmission and reception of electromagnetic wave signals in the second frequency band; wherein, When the antenna module is in the first operating mode, the first resonant mode, the second resonant mode, and the fourth resonant mode jointly support the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band; when the antenna module is in the second operating mode, the first resonant mode, the third resonant mode, and the fourth resonant mode jointly support the transmission and reception of electromagnetic wave signals in the first frequency band and the second frequency band.
4. The antenna module according to claim 3, characterized in that, The first antenna includes: a first stub and a first tuning circuit; The first branch is provided with the first feed point, and the first branch has a first end and a second end; the first feed point is electrically connected to the power supply through the first tuning circuit; wherein, the first tuning circuit is used to tune the first resonant mode, the second resonant mode and the third resonant mode.
5. The antenna module according to claim 3, characterized in that, The second antenna includes: a second stub and a second tuning circuit; The second branch is provided with the second feed point, and the second branch has the third end and the fourth end; the second tuning circuit is electrically connected to the second branch located between the third end and the second feed point; wherein, the second tuning circuit is used to tune the fourth resonant mode.
6. The antenna module according to claim 5, characterized in that, The second antenna also includes: a filter circuit and a filter capacitor; The second power supply point is electrically connected to the power supply through the filter circuit; one end of the filter capacitor is electrically connected to the return point, and the other end is grounded.
7. The antenna module according to claim 4, characterized in that, The first branch includes a first sub-branch and a second sub-branch that are connected, and the extension directions of the first sub-branch and the second sub-branch intersect; wherein, The end of the first sub-branch that is furthest from the second sub-branch is the second end; the end of the second sub-branch that is furthest from the first sub-branch is the first end; the first feed point is located on the first sub-branch.
8. The antenna module according to claim 5, characterized in that, The second branch includes a third sub-branch and a fourth sub-branch that are connected, and the extension directions of the third sub-branch and the fourth sub-branch intersect; wherein, The end of the third sub-branch away from the fourth sub-branch is the third end; the end of the fourth sub-branch away from the third sub-branch is the fourth end; the second feed point is located on the third sub-branch, and the return point is located on the fourth sub-branch.
9. The antenna module according to claim 3, characterized in that, The first frequency band is a mid-to-high frequency band, and the second frequency band is a low frequency band.
10. The antenna module according to claim 9, characterized in that, The first frequency band includes: a first sub-frequency band and a second sub-frequency band; The first resonant mode supports the transmission and reception of electromagnetic wave signals in the first sub-frequency band, the second resonant mode supports the transmission and reception of electromagnetic wave signals in the second sub-frequency band, and the third resonant mode supports the transmission and reception of electromagnetic wave signals in the first sub-frequency band.
11. The antenna module according to claim 10, characterized in that, The first sub-band includes at least one of the B1 and B3 bands, the second sub-band includes the B41 band, and the second band includes at least one of the B5, B8, B28A, and B28B bands.
12. A mid-frame component, characterized in that, The mid-frame assembly includes: the antenna module, the substrate, and the frame as described in any one of claims 1-11; The substrate is provided with a ground plane and a power supply; the first power supply point is electrically connected to the power supply, and the first end of the first antenna is electrically connected to the ground plane; the frame surrounds the periphery of the substrate, and the first antenna and the second antenna are disposed on the frame.
13. An electronic device, characterized in that, The electronic device includes: the mid-frame assembly, the display screen, and the back cover as described in claim 12; The display screen is disposed on one side of the frame, and the back cover is disposed on the opposite side of the frame.