Electronic device

Abstract

This application discloses an electronic device. A first antenna element includes a first signal source, a first radiator, and a first matching circuit. The first radiator includes a first ground point, a first feed point, and a first free end, arranged sequentially. The first signal source is electrically connected to the first feed point to excite the first radiator to support at least a first GPS frequency band. One end of a bandpass circuit is electrically connected to the first feed point, and the other end of the bandpass circuit is grounded. The bandpass circuit operates in a band-stop state for the first GPS frequency band. A second antenna element includes a second signal source and a second radiator. The second radiator includes a second free end, a second feed point, and a second ground point, arranged sequentially. The second free end is coupled to the first free end via a slot. The second signal source is electrically connected to the second feed point to excite the second radiator to support a target frequency band. The bandpass circuit operates in a bandpass state for the target frequency band. The electronic device provided by this application can cover multiple frequency bands and has good performance.

Description

Technical Field

[0001] This application relates to the field of communication technology, specifically to an electronic device. Background Technology

[0002] With the development of communication technology, antennas have become a particularly important part of electronic device communication. As the communication needs of electronic devices increase, how to design high-performance antennas that cover multiple frequency bands has become a technical problem that needs to be solved. Summary of the Invention

[0003] This application provides an electronic device that can cover multiple frequency bands and has good performance.

[0004] This application provides an electronic device, including a first antenna module and a second antenna module that are independently arranged and both disposed on the top of the electronic device. The first antenna module includes:

[0005] A first antenna element, comprising a first signal source, a first radiator, and a first matching circuit, wherein the first radiator includes a first ground point, a first feed point, and a first free end arranged sequentially; the first signal source is electrically connected to the first feed point to excite the first radiator to at least support the first GPS frequency band; the first matching circuit includes a bandpass circuit, one end of which is electrically connected to the first feed point, and the other end of which is grounded; the bandpass circuit operates in a band-stop state for the first GPS frequency band; and the first ground point is grounded.

[0006] The second antenna unit includes a second signal source and a second radiator. The second radiator includes a second free end, a second feed point, and a second ground point arranged sequentially. The second free end is coupled to the first free end through a gap. The second ground point is grounded. The second signal source is electrically connected to the second feed point to excite the second radiator to support a target frequency band. The minimum frequency of the target frequency band is greater than the maximum frequency of the first GPS frequency band. The bandpass circuit is in a bandpass state for the target frequency band. The second antenna module is located on the side of the first antenna unit away from the second antenna unit, and the first ground point is located between the first free end and the second antenna module. The second antenna module is used to support a second GPS frequency band.

[0007] This application provides an electronic device that reduces efficiency degradation caused by mutual interference between two GPS-band antennas by independently configuring two GPS-band antennas. Both GPS-band antennas are positioned at the top of the electronic device, enabling them to generate more lateral current modes on a reference ground plane, thus increasing the proportion of radiated energy in the upper hemisphere and improving GPS performance. The device utilizes a first antenna module comprising a first antenna unit and a second antenna unit. The first antenna unit includes a first signal source, a first radiator, and a first matching circuit. The first radiator includes a first ground point, a first feed point, and a first free end arranged sequentially. The first signal source is electrically connected to the first feed point to excite the first radiator to support at least the first GPS band. The first matching circuit includes a bandpass circuit, one end of which is electrically connected to the first feed point, and the other end is grounded. The bandpass circuit operates in a band-stop state for the first GPS band. The second antenna unit includes a second signal source and a second radiator. The second radiator includes a second free end, a second feed point, and a second ground point arranged sequentially. The second free end is coupled to the first free end through a gap. A second signal source is electrically connected to the second feed point to excite the second radiator to support the target frequency band. The minimum frequency of the target frequency band is greater than the maximum frequency of the first GPS frequency band. The bandpass circuit is in a bandpass state for the target frequency band. By setting a bandpass circuit in the first matching circuit that is in a bandpass state for the target frequency band and a band-stop state for the first GPS frequency band, the target frequency band is grounded, reducing the interference of the target frequency band to the first GPS frequency band, improving the radiation efficiency of the first GPS frequency band, and enabling the electronic equipment to cover multiple frequency bands and achieve high performance. The second antenna module is placed on the side of the first antenna unit away from the second antenna unit, and the first ground point is located between the first free end and the second antenna module. The second antenna module is used to support the second GPS frequency band, realizing the separate design of the antennas for the first and second GPS frequency bands, reducing the mutual influence between the antennas of the second and first GPS frequency bands. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

[0009] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0010] Figure 2 yes Figure 1 A schematic diagram of the exploded structure of the provided electronic device;

[0011] Figure 3 yes Figure 2 A schematic diagram of the antenna assembly on the provided electronic device;

[0012] Figure 4 yes Figure 3 A schematic diagram of the structure of the first antenna module;

[0013] Figure 5 yes Figure 4 A schematic diagram of the structure of the first type of first matching circuit in China;

[0014] Figure 6 yes Figure 3 A schematic diagram of the structure of the second antenna module in the middle of the plane;

[0015] Figure 7 yes Figure 4 The first antenna unit supports the radiation pattern of the GPS-L1 band;

[0016] Figure 8 yes Figure 4 A schematic diagram of the structure of the second type of first matching circuit;

[0017] Figure 9 yes Figure 4 A schematic diagram of the third type of first matching circuit in the circuit;

[0018] Figure 10 yes Figure 3 Current distribution diagram of the first resonant mode on the first antenna module;

[0019] Figure 11 yes Figure 3 A schematic diagram of the structure of the first matching circuit of the first antenna module, which includes a tuning circuit;

[0020] Figure 12 yes Figure 3 Current distribution diagram of the second resonant mode on the first antenna module;

[0021] Figure 13 yes Figure 3 Current distribution diagram of the third resonant mode on the first antenna module;

[0022] Figure 14 yes Figure 3 Current distribution diagram of the fourth resonant mode on the first antenna module;

[0023] Figure 15 yes Figure 4 A schematic diagram of the second matching circuit in the middle;

[0024] Figure 16 yes Figure 4 S-parameter curves of the first antenna element and the second antenna element;

[0025] Figure 17 yes Figure 4Radiation efficiency curves and overall efficiency curves of the first antenna element, the second antenna element;

[0026] Figure 18 These are the S-parameter curves of the second antenna unit in this application embodiment when the switching unit is switched to different states;

[0027] Figure 19 This is a schematic diagram of the structure of the second radiator of the second antenna unit as a detection electrode in an embodiment of this application.

[0028] Explanation of icon numbers:

[0029] Electronic device 1000; Antenna assembly 100; First antenna module 100a; Second antenna module 100b; Display screen 200; Middle frame 300; Back cover 400; Middle plate 310; Frame 320; Top edge 321; Bottom edge 322; First side edge 323; Second side edge 324; First antenna element 10; Second antenna element 20; First signal source 101; First radiator 102; First matching circuit M1; First ground point A; First feed point B; First free end C; Bandpass circuit N1; Second signal source 201; Second radiator 202; Second free end D; Second feed point E; Second ground point F; Second matching circuit M2; Second inductor L2; Third inductor L3; First capacitor C1; Third antenna element 30; Fourth antenna element 40; Third signal... Source 301; Third radiator 302; Third ground point G; Third feed point H; Third free terminal I; Third matching circuit M3; Fourth signal source 401; Fourth radiator 402; Fourth free terminal J; Fourth feed point K; Fourth ground point O; Fourth matching circuit M4; Reference ground 50; Band-resistance circuit N2; First inductor element L1; Second capacitor element C2; Tuning circuit T; Switching branch Q; Switching unit Q1; First electrical connection point W1; Second electrical connection point W2; Third electrical connection point W3; Fourth electrical connection point W4; Fifth electrical connection point W5; First switching branch R1; Second switching branch R2; Third switching branch R3; Fourth switching branch R4; Third capacitor element C3; Fourth capacitor element C4; Fifth capacitor element C5; Sixth capacitor element C6; Detection circuit 60. Detailed Implementation

[0030] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described in this application are only a part of the embodiments, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without creative effort are within the protection scope of this application.

[0031] 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 in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0032] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, an assembly or device comprising one or more components is not limited to the one or more components listed, but may optionally also include one or more components not listed but inherent to the exemplified product, or one or more components that it should have based on the described function.

[0033] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of this application. The electronic device 1000 includes, but is not limited to, devices with communication functions such as mobile phones, tablets, laptops, computers, wearable devices, drones, robots, and digital cameras. This embodiment uses a mobile phone as an example for illustration; other electronic devices can refer to this embodiment.

[0034] Please see Figure 2 The electronic device 1000 includes an antenna assembly 100. The antenna assembly 100 can improve antenna efficiency.

[0035] Please see Figure 2Taking a mobile phone as an example, the working environment of the antenna assembly 100 is illustrated below. The electronic device 1000 includes a display screen 200, a mid-frame 300, and a back cover 400 arranged sequentially along its thickness. The mid-frame 300 includes a mid-plate 310 and a frame 320 surrounding the mid-plate 310. The display screen 200, mid-plate 310, and back cover 400 are stacked sequentially, forming receiving spaces between the display screen 200 and mid-plate 310, and between mid-plate 310 and back cover 400, to accommodate components such as the motherboard, camera module, receiver module, battery, and various sensors. One side of the frame 320 surrounds the edge of the display screen 200, and the other side surrounds the edge of the back cover 400, forming the complete external structure of the electronic device 1000. In this embodiment, the frame 320 and mid-plate 310 are an integral structure, while the frame 320 and back cover 400 can be separate structures. In other embodiments, the frame 320 and the back cover 400 may be an integral structure, or the frame 320 and the back cover 400 may be separate structures. The above describes the working environment of the antenna assembly 100 using a mobile phone as an example, but the antenna assembly 100 of this application is not limited to the above working environment.

[0036] Please see Figure 3 The frame 320 includes a top edge 321 and a bottom edge 322 disposed opposite to each other, and a first side edge 323 and a second side edge 324 connecting the top edge 321 and the bottom edge 322. The top edge 321 is the side away from the ground when the user holds and uses the electronic device 1000, and the bottom edge 322 is the side facing the ground when the user holds and uses the electronic device 1000. The first side edge 323 is the right side when the user faces the back cover 400 of the electronic device 1000, and the second side edge 324 is the left side when the user faces the back cover 400 of the electronic device 1000. Figure 3 The frame 320 in the image is a rear view of the back cover 400 side.

[0037] The antenna assembly 100 includes a first antenna module 100a and a second antenna module 100b, both independently disposed and located on the top of the electronic device 1000. The term "independent" in this application means that the first antenna module 100a and the second antenna module 100b are not mutually coupled or the coupling current between them is extremely small and negligible. Both the first antenna module 100a and the second antenna module 100b are located on the top of the electronic device 1000. It is understood that the feed position of the first antenna module 100a is located at the top edge 321 of the electronic device 1000, and the feed position of the second antenna module 100b is also located at the top edge 321 of the electronic device 1000. Specific examples of the feed position located at the top edge 321 of the electronic device 1000 will be provided later, taking into account the placement of the radiators.

[0038] Please see Figure 4The first antenna module 100a includes at least a first antenna element 10 and a second antenna element 20.

[0039] The first antenna unit 10 includes a first signal source 101, a first radiator 102, and a first matching circuit M1.

[0040] The first radiator 102 serves as the port for transmitting and receiving radio frequency (RF) signals in the first antenna module 100a. The RF signals are transmitted in the air medium as electromagnetic waves. This application does not specifically limit the material of the first radiator 102. Optionally, the first radiator 102 may be made of a conductive material, including but not limited to conductive materials such as metals and alloys.

[0041] This application does not specifically limit the shape of the first radiator 102. For example, the shape of the first radiator 102 includes, but is not limited to, strip, sheet, rod, coating, film, etc. Figure 4 The first radiator 102 shown is merely an example and does not limit the shape of the first radiator 102 provided in this application. In this embodiment, the first radiator 102 is always strip-shaped. This application does not limit the extension trajectory of the first radiator 102. Optionally, the first radiator 102 may extend along a straight line, a curve, or a bend. In this embodiment, the first radiator 102 is straight. The first radiator 102 described above may be a line of uniform width on its extension trajectory, or it may be a strip of varying width, such as one with a gradually changing width or a widened region.

[0042] This application does not specifically limit the form of the first radiator 102. Optionally, the form of the first radiator 102 includes, but is not limited to, a metal frame 320, a metal frame embedded in a plastic frame 320, a metal first radiator 102 located within or on the surface of the frame 320, a flexible circuit board antenna formed on a flexible printed circuit board (FPC), a laser direct-formed antenna (LDS), a printed direct-formed antenna (PDS), a conductive sheet antenna (e.g., a metal bracket antenna), etc. In the embodiments of this application, the first radiator 102 may be a mechanical design antenna (MDA) designed using the embedded metal of the electronic device 1000 itself.

[0043] Please see Figure 4 The first radiator 102 includes a first grounding point A, a first feed point B, and a first free end C arranged sequentially.

[0044] The first free end C is the end that is disconnected from other structures. The first grounding point A is used for electrical connection to the reference ground system, wherein the electrical connection method includes, but is not limited to, direct connection or indirect connection.

[0045] The first signal source 101 is electrically connected to the first feed point B and is used to excite the first radiator 102 to at least support the first GPS frequency band.

[0046] The first signal source 101 includes, but is not limited to, radio frequency transceiver chips. The first signal source 101 provides a radio frequency excitation current. After the radio frequency excitation current is transmitted to the first radiator 102, and the electrical length of the first radiator 102 satisfies the resonance condition and the impedance matching condition of the first matching circuit M1, it can excite the first radiator 102 to generate a resonant current, forming a resonant mode to support the frequency band corresponding to the resonant current. In this embodiment, the frequency band supported by the first radiator 102 includes the first GPS frequency band. This embodiment uses the GPS-L5 frequency band as an example for illustration.

[0047] In this embodiment, the first signal source 101 is disposed on the motherboard. The electrical connection between the first signal source 101 and the first feed point B includes, but is not limited to, direct soldering or indirect connection via coaxial cable, microstrip line, conductive spring, conductive adhesive, etc. Specifically, the first signal source 101 is electrically connected to the first feed point B via a feed spring (conductive spring) disposed on the motherboard.

[0048] By setting the electrical length of the first radiator 102 and the first matching circuit M1, the first signal source 101 excites the first radiator 102 to form a resonant current supporting the first GPS frequency band. In this application, the mode of the resonant current is referred to as the first resonant mode.

[0049] Please see Figure 4 The first matching circuit M1 includes a bandpass circuit N1, one end of which is electrically connected to the first feed point B, and the other end is grounded. The bandpass circuit N1 operates in a band-stop state for the first GPS frequency band. In other words, the bandpass circuit N1 is equivalent to an open circuit for the first GPS frequency band. The first GPS frequency band signal transmitted by the first signal source 101 will not be grounded via the bandpass circuit N1, but will be transmitted to the first radiator 102 via the first feed point B. The bandpass circuit N1 includes, but is not limited to, capacitive and / or inductive elements.

[0050] Please see Figure 4 The second antenna unit 20 includes a second signal source 201 and a second radiator 202.

[0051] The material and shape of the second radiator 202 can be the same as those of the first radiator 102, both being conductive materials and structural components designed using the embedded metal of the electronic device 1000 itself. In this embodiment, the second radiator 202 is not limited to being straight or bent.

[0052] Please see Figure 4 The second radiator 202 includes a second free end D, a second feed point E, and a second grounding point F arranged sequentially.

[0053] The second free end D is the end that is disconnected from other structures. The second grounding point F is used for electrical connection to the reference ground system, wherein the electrical connection method includes, but is not limited to, direct connection or indirect connection.

[0054] The second free end D is coupled to the first free end C through a gap. The insulating gap between the first free end C and the second free end D, including but not limited to 0.5mm-2mm, allows capacitive coupling between the first radiator 102 and the second radiator 202. To increase the structural strength of the frame, insulating material can be filled into the insulating gap. A strong electric field exists between the first free end C of the first radiator 102 and the second free end D of the second radiator 202, enabling the transmission of current signals even when the first free end C and the second free end D are not in direct contact (not physically connected).

[0055] The second signal source 201 is electrically connected to the second feed point E and is used to excite the second radiator 202 to support the target frequency band. The second signal source 201 includes, but is not limited to, radio frequency transceiver chips. In this embodiment, the second signal source 201 is disposed on the motherboard. The electrical connection between the second signal source 201 and the second feed point E includes, but is not limited to, direct soldering, or indirect methods such as coaxial cables, microstrip lines, conductive springs, and conductive adhesives. Specifically, the second signal source 201 is electrically connected to the second feed point E through a feed spring (conductive spring) disposed on the motherboard.

[0056] Further, please refer to Figure 4 The second antenna unit 20 also includes a second matching circuit M2. The second matching circuit M2 is electrically connected between the second feed point E and the second signal source 201. The second matching circuit M2 includes inductor and / or capacitor elements, and is used to achieve impedance matching to tune the resonant mode formed on the second radiator 202 that supports the target frequency band.

[0057] The minimum frequency of the target frequency band is greater than the maximum frequency of the first GPS frequency band. Optionally, the first GPS frequency band is the GPS-L5 band. The target frequency band includes, but is not limited to, the MHB band, the UHB band, the Wi-Fi 2.4G band, and the Wi-Fi 5G band. The MHB band is 1710MHz-2690MHz. The UHB band includes, but is not limited to, the N78 band and the N79 band. An example is given using a target frequency band including both the MHB and N78 bands.

[0058] The bandpass circuit N1 is in a bandpass state for the target frequency band. The bandpass circuit N1 has a low impedance relative to the target frequency band, and is in a conducting state. In other words, the bandpass circuit N1 is equivalent to a short circuit or low impedance to ground relative to the target frequency band. After the target frequency band excited by the second signal source 201 is transmitted to the first radiator 102 through the coupling gap, it is grounded through the first feed point B and the bandpass circuit N1, thus not affecting the first signal source 101. Therefore, the GPS-L5 frequency band excited by the first signal source 101 will not be affected by the second antenna unit 20, improving the performance of the GPS-L5 frequency band.

[0059] Optional, please refer to Figure 5 The bandpass circuit N1 includes a second inductor L2, a third inductor L3, and a first capacitor C1. One end of the second inductor L2 is electrically connected to the first feed point B, and the other end of the second inductor L2 is electrically connected to one end of the first capacitor C1, the other end of the first capacitor C1 being grounded. One end of the third inductor L3 is electrically connected to the first feed point B, and the other end of the third inductor L3 being grounded.

[0060] This application does not specifically limit the inductance value of the second inductor L2, the inductance value of the third inductor L3, and the capacitance value of the first capacitor C1. For example, the inductance value of the second inductor L2 is 2.7nH, the inductance value of the third inductor L3 is 8.2nH, and the capacitance value of the first capacitor C1 is 2.2pF, but is not limited to these values.

[0061] The second antenna module 100b is located on the side of the first antenna unit 10 away from the second antenna unit 20, and the first grounding point A is located between the first free end C and the second antenna module 100b. The second antenna module 100b is used to support the second GPS frequency band. The first antenna unit 10 is used to support the first GPS frequency band, and the second antenna module 100b is used to support the second GPS frequency band. The first GPS frequency band is the GPS-L1 frequency band, and the second GPS frequency band is the GPS-L5 frequency band; or, the first GPS frequency band is the GPS-L5 frequency band, and the second GPS frequency band is the GPS-L1 frequency band. Of course, in other embodiments, both the first and second GPS frequency bands are the GPS-L1 frequency band; or, both the first and second GPS frequency bands are the GPS-L5 frequency band. The above design ensures that the antennas of the first GPS band and the second GPS band are independent of each other. Since the first grounding point A is located between the antennas of the first GPS band and the second GPS band, the coupling effect between the antennas of the first GPS band and the second GPS band is reduced, and the mutual influence between the antennas of the second GPS band and the first GPS band is reduced.

[0062] This application provides an electronic device 1000 that reduces efficiency degradation caused by mutual interference between two GPS-band antennas by independently configuring two GPS-band antennas. By placing both GPS-band antennas on the top of the electronic device 1000, both antennas can generate more lateral current modes on the reference floor, increasing the proportion of radiated energy in the upper hemisphere and thus improving GPS performance. This is achieved by configuring a first antenna module 100a, including a first antenna element 10 and a second antenna element 20. The first antenna unit 10 includes a first signal source 101, a first radiator 102, and a first matching circuit M1. The first radiator 102 includes a first ground point A, a first feed point B, and a first free end C arranged sequentially. The first signal source 101 is electrically connected to the first feed point B and is used to excite the first radiator 102 to support at least the first GPS frequency band. The first matching circuit M1 includes a bandpass circuit N1. One end of the bandpass circuit N1 is electrically connected to the first feed point B, and the other end of the bandpass circuit N1 is grounded. The bandpass circuit N1 is in a band-stop state for the first GPS frequency band. The second antenna unit 20 includes a second signal source 20. 1 and a second radiator 202, the second radiator 202 including a second free end D, a second feed point E and a second ground point F arranged sequentially, the second free end D and the first free end C are coupled through a gap, the second signal source 201 is electrically connected to the second feed point E, used to excite the second radiator 202 to support the target frequency band, the minimum frequency of the target frequency band is greater than the maximum frequency of the first GPS frequency band; wherein, the bandpass circuit N1 is in a bandpass state for the target frequency band; by setting the bandpass circuit N1 in the first matching circuit M1 in a bandpass state for the target frequency band and a bandstop state for the first GPS frequency band, the target frequency band is turned on. By grounding the device, interference from the target frequency band to the first GPS frequency band is reduced, and the radiation efficiency of the first GPS frequency band is improved, enabling the electronic device 1000 to cover multiple frequency bands and achieve high performance. Specifically, by placing the second antenna module 100b on the side of the first antenna unit 10 away from the second antenna unit 20, and with the first grounding point A located between the first free end C and the second antenna module 100b, the second antenna module 100b is used to support the second GPS frequency band. This achieves separate antenna design for the first and second GPS frequency bands, reducing the mutual influence between the antennas of the second and first GPS frequency bands.

[0063] Please see Figure 6 The second antenna module 100b includes a third antenna element 30 and a fourth antenna element 40.

[0064] Please see Figure 6 The third antenna unit 30 includes a third signal source 301 and a third radiator 302.

[0065] The material and shape of the third radiator 302 can be the same as those of the first radiator 102, both being conductive materials and structural components designed using the embedded metal of the electronic device 1000 itself. In this embodiment, the third radiator 302 is not limited to being straight or bent.

[0066] Please see Figure 6 The third radiator 302 includes a third grounding point G, a third feed point H, and a third free end I, arranged sequentially. The third free end I is an end disconnected from other structures. The third grounding point G is used for electrical connection to a reference ground system, wherein the electrical connection method includes, but is not limited to, direct connection or indirect connection.

[0067] The third signal source 301 is electrically connected to the third feed point H, and is used to excite the third radiator 302 to support the second GPS frequency band and the first Wi-Fi frequency band. In this embodiment, the second GPS frequency band is the GPS-L1 frequency band. The first Wi-Fi frequency band is either the Wi-Fi 2.4G frequency band or the Wi-Fi 5G frequency band. In this embodiment, the first Wi-Fi frequency band is the Wi-Fi 2.4G frequency band.

[0068] The third signal source 301 includes, but is not limited to, radio frequency transceiver chips. In this embodiment, the third signal source 301 is disposed on the motherboard. The electrical connection between the third signal source 301 and the third feed point H includes, but is not limited to, direct soldering, or indirect methods such as coaxial cable, microstrip line, conductive spring, conductive adhesive, etc. Specifically, the third signal source 301 is electrically connected to the third feed point H through a feed spring (conductive spring) disposed on the motherboard.

[0069] Further, please refer to Figure 6 The third antenna unit 30 also includes a third matching circuit M3. The third matching circuit M3 is electrically connected between the third feed point H and the third signal source 301. The third matching circuit M3 includes an inductor and / or a capacitor, and is used to achieve impedance matching to tune the third radiator 302 to form a resonant mode supporting the second GPS band and the first Wi-Fi band.

[0070] Please see Figure 6 The fourth antenna unit 40 includes a fourth signal source 401 and a fourth radiator 402.

[0071] The material and shape of the fourth radiator 402 can be the same as those of the first radiator 102, both being conductive materials and structural components designed using the embedded metal of the electronic device 1000 itself. In this embodiment, the fourth radiator 402 is not limited to being straight or bent.

[0072] Please see Figure 6The fourth radiator 402 includes a fourth free end J, a fourth feed point K, and a fourth ground point O arranged sequentially. The fourth free end J is an end disconnected from other structures. The fourth ground point O is used for electrical connection to a reference ground system, wherein the electrical connection method includes, but is not limited to, direct connection or indirect connection.

[0073] The fourth free end J is coupled to the third free end I through a gap. The insulating gap between the third free end I and the fourth free end J, including but not limited to 0.5mm-2mm, allows capacitive coupling between the third radiator 302 and the fourth radiator 402. To increase the structural strength of the frame, insulating material can be filled into the insulating gap. A strong electric field exists between the third free end I of the third radiator 302 and the fourth free end J of the second radiator 202, enabling the transmission of current signals even when the third free end I and the fourth free end J are not in direct contact (not physically connected).

[0074] The fourth signal source 401 is electrically connected to the fourth feed point K, and is used to excite the fourth radiator 402 to support the second Wi-Fi band and the UHB band. In this embodiment, the second Wi-Fi band is the Wi-Fi 5G band. In this embodiment, the UHB band is the N78 band as an example.

[0075] In this embodiment, the fourth signal source 401 is disposed on the motherboard. The electrical connection between the fourth signal source 401 and the fourth feed point K includes, but is not limited to, direct soldering, or indirect methods such as coaxial cable, microstrip line, conductive spring, or conductive adhesive. Specifically, the fourth signal source 401 is electrically connected to the fourth feed point K through a feed spring (conductive spring) disposed on the motherboard.

[0076] Further, please refer to Figure 6 The fourth antenna unit 40 also includes a fourth matching circuit M4. The fourth matching circuit M4 is electrically connected between the fourth feed point K and the fourth signal source 401. The fourth matching circuit M4 includes an inductor and / or a capacitor, and is used to achieve impedance matching to tune the fourth radiator 402 to form a resonant mode supporting the second Wi-Fi band and the UHB band.

[0077] As can be seen from the above, the first antenna module 100a and the second antenna module 100b provided in this application can support GPS-L1 band, GPS-L5 band, Wi-Fi 2.4G band, Wi-Fi 5G band, MHB band, and N78 band. By designing the power supply position, independent design, and matching circuit of the first antenna module 100a and the second antenna module 100b, GPS performance is improved while covering multiple frequency bands.

[0078] Please see Figure 3 The electronic device 1000 also includes a reference ground plane 50. The reference ground plane 50 is disposed within the area enclosed by the frame 320. The reference ground plane 50 is the aforementioned reference ground system, which includes, but is not limited to, the metal alloy portion of the middle plate and the reference ground metal portion of the circuit board (including the main board and sub-board). Generally speaking, the reference ground system in the electronic device 1000 can be equivalent to a roughly rectangular shape, hence the name reference ground plane 50. However, reference ground plane 50 does not imply that the reference ground is plate-shaped or a rectangular plate.

[0079] Please see Figure 3 and Figure 4 The first radiator 102 is located on the top edge 321. Furthermore, the first feed point B is also located on the top edge 321, meaning the feed position of the first antenna element 10 is located on the top edge 321. A portion of the second radiator 202 is located on the top edge 321, and another portion is located on the first side edge 323. The first radiator 102 is further away from the first side edge 323 than the second radiator 202. Specifically, in the direction from the second side edge 324 to the first side edge 323, the first ground point A, the first feed point B, and the first free end C of the first radiator 102, the second free end D of the second radiator 202, and the second feed point E are sequentially arranged, with the second ground point F located on the first side edge 323.

[0080] Please see Figure 3 and Figure 4 The first feed point B is located at the top edge 321, not close to the first side edge 323. Thus, in the resonant mode supporting the GPS-L5 band, the ground current formed by the first antenna element 10 on the reference ground 50 is primarily a lateral current, i.e., it excites a lateral current mode on the reference ground 50, where the current direction is parallel to the top edge 321. The first antenna element 10, in its resonant mode supporting the GPS-L5 band, primarily exhibits a lateral current mode on the reference ground 50, which can increase the proportion of radiated energy from the GPS-L5 band in the upper hemisphere.

[0081] Please see Figure 3 and Figure 6A portion of the radiator (i.e., the third radiator 302) of the third antenna unit 30 is located on the top edge 321. Another portion of the radiator of the third antenna unit 30 is located on the second side edge 324. The feed point (i.e., the third feed point H) of the radiator of the third antenna unit 30 is located on the top edge 321, meaning the feed position of the first antenna unit 10 is located on the top edge 321. The radiator (i.e., the fourth radiator 402) of the fourth antenna unit 40 is located on the top edge 321. The fourth radiator 402 is further away from the second side edge 324 than the third radiator 302. Specifically, from the first side edge 323 to the second side edge 324, the fourth ground point O, the fourth feed point K, and the fourth free end J of the fourth radiator 402, the third free end I of the third radiator 302, and the third feed point H are sequentially arranged, with the third ground point G located on the second side edge 324.

[0082] Please see Figure 3 and Figure 6 The third feed point H is located at the top edge 321, not close to the second side edge 324. Thus, the ground current formed on the reference ground plane 50 in the resonant mode supporting the GPS-L1 band by the third antenna element 30 is mainly a lateral current, i.e., it excites a lateral current mode on the reference ground plane 50, where the current direction is parallel to the top edge 321. The fact that the resonant mode of the third antenna element 30 supporting the GPS-L1 band is mainly a lateral current mode on the reference ground plane 50 can increase the proportion of radiated energy of the GPS-L1 band in the upper hemisphere, making the upper hemisphere proportion of both the GPS-L1 and GPS-L5 bands approximately 50%.

[0083] Please see Figure 7 , Figure 7 The first antenna element 10 provided in this application supports the radiation pattern of the GPS-L5 band. As can be seen from the radiation pattern of the GPS-L5 band, the radiation pattern is basically balanced vertically, with the upper hemisphere accounting for 50%, indicating good GPS performance.

[0084] The structure of the first matching circuit M1 is illustrated below with reference to the accompanying drawings.

[0085] Please see Figure 8The first matching circuit M1 further includes a band-stop circuit N2. One end of the band-stop circuit N2 is electrically connected to the first feed point B, and the other end is electrically connected to the first signal source 101. The band-stop circuit N2 is in a band-stop state for the target frequency band and a band-pass state for the first GPS frequency band. In other words, the band-pass circuit N1 is equivalent to an open circuit for the target frequency band and a short circuit or low impedance state for the first GPS frequency band. The first GPS frequency band can be transmitted from the first signal source 101 to the first radiator 102 via the band-stop circuit N2. The target frequency band signal emitted by the second signal source 201 is coupled to the first radiator 102, then grounded via the band-pass circuit N1 and blocked by the band-stop circuit N2, without affecting the first signal source 101. This avoids the first GPS frequency band (GPS-L5 frequency band) being affected by the second antenna unit 20, further improving the performance of the first GPS frequency band (GPS-L5 frequency band). The band-stop circuit N2 includes, but is not limited to, capacitors and / or inductors.

[0086] This application further blocks the influence of the signal transmitted by the second signal source 201 on the first signal source 101 by setting a band-stop circuit N2 in the first matching circuit M1, thereby further improving the performance of the first signal source 101 in transmitting and receiving the first GPS frequency band (GPS-L5 frequency band).

[0087] Optional, please refer to Figure 8 The circuit N2 with resistance includes a first inductor L1. One end of the first inductor L1 is electrically connected to the first feed point B, and the other end is electrically connected to the first signal source 101. The first inductor L1 is a large inductor. This application does not specifically limit the inductance value of the first inductor L1. Optionally, the inductance value of the first inductor L1 is 10nH, but it is not limited to this value. The first inductor L1 can pass low frequencies and block high frequencies, that is, it can conduct the first GPS frequency band (GPS-L5 band) and block the passage of the target frequency band, so that the first signal source 101 can smoothly transmit and receive the first GPS frequency band (GPS-L5 band) and block the target frequency band from interfering with the first signal source 101.

[0088] Optional, please refer to Figure 9The first matching circuit M1 further includes a second capacitor element C2. One end of the second capacitor element C2 is electrically connected to the first feed point B, and the other end of the second capacitor element C2 is grounded. The second capacitor element C2 is used to adjust the electrical length of the first radiator 102 so that the electrical length of the first radiator 102 matches the resonant mode formed by the first radiator 102 under the excitation of the first signal source 101, which is 1 / 4 wavelength of the first GPS frequency band. In other words, the electrical length of the first radiator 102 is close to 1 / 4 wavelength of the first GPS frequency band, which promotes the formation of the resonant mode of the first radiator 102 under the excitation of the first signal source 101, thereby supporting the first GPS frequency band.

[0089] Optionally, the second capacitor element C2 is a small capacitor. The second capacitor element C2 is also used to conduct the target frequency band (e.g., the MHB+N78 frequency band) to ground, so that the target frequency band (e.g., the MHB+N78 frequency band) is grounded through the second capacitor element C2, thereby avoiding the target frequency band (e.g., the MHB+N78 frequency band) from affecting the first signal source 101.

[0090] The above is an example of the first matching circuit M1. The first matching circuit M1 can also have other structures.

[0091] Please see Figure 10 For the first antenna element 10, the first signal source 101 can excite the first radiator 102 to form a first resonant mode supporting the first GPS frequency band. The resonant current of the first resonant mode is distributed between the first free end C and the first ground point A. Optionally, the resonant current of the first resonant mode can flow from the first free end C to the first ground point A. Due to the periodicity of the current, the resonant current of the first resonant mode can also flow from the first ground point A to the first free end C.

[0092] The first resonant mode is a quarter-wavelength mode of the first GPS frequency band. In other words, the electrical length of the first radiator 102 is close to one-quarter wavelength of the center frequency of the first GPS frequency band. The first antenna element 10 provided in this embodiment is an IFA antenna. The first resonant mode is a quarter-wavelength mode. The quarter-wavelength mode is the ground state mode of the IFA antenna, which has relatively high efficiency, ensuring that the first antenna element 10 has relatively high efficiency when operating in the first GPS frequency band.

[0093] For the first antenna element 10, the first signal source 101 can also excite the first radiator 102 to support the LB band. In other words, the first resonant mode can also support the LB band. The LB band is 703MHz-960MHz. Optionally, the LB band includes, but is not limited to, the N28 band.

[0094] Please see Figure 11 The first matching circuit M1 further includes a tuning circuit T. The equivalent capacitance of the tuning circuit T for the LB band is different from the equivalent capacitance of the tuning circuit T for the first GPS band. Specifically, the equivalent capacitance of the tuning circuit T for the LB band is smaller than the equivalent capacitance of the tuning circuit T for the first GPS band. The first radiator 102, in conjunction with the tuning circuit T, makes the effective electrical length of the first radiator 102 (including the electrical length of the tuning circuit T) close to 1 / 4 wavelength of the LB band (e.g., the N28 band) and also close to 1 / 4 wavelength of the first GPS band (e.g., the GPS-L5 band). The tuning circuit T includes inductive and / or capacitive elements.

[0095] This embodiment incorporates a low-frequency antenna into the first antenna unit 10, enabling the first antenna unit 10 to support both the GPS-L5 band and the LB band. This achieves multi-band coverage while also increasing the proportion of energy from the GPS-L5 and GPS-L1 bands in the upper hemisphere, thereby improving the performance of the GPS-L5 and GPS-L1 bands.

[0096] In this embodiment, the first antenna module 100a is located on the right side of the top edge 321 of the electronic device 1000 (rear view), and the second antenna module 100b is located on the left side of the top edge 321 of the electronic device 1000 (rear view). Of course, in other embodiments, the first antenna module 100a may also be located on the left side of the top edge 321 of the electronic device 1000 (rear view), and the second antenna module 100b may be located on the right side of the top edge 321 of the electronic device 1000 (rear view).

[0097] Optionally, the target frequency band includes the MB band. The MB band is 1710MHz-2170MHz. For example, the MB band includes at least one of the B1 band, B3 band, B40 band, and B41 band.

[0098] Please see Figure 12 The second signal source 201 excites the second radiator 202 to form a second resonant mode supporting the MB frequency band. The resonant current of the second resonant mode is distributed between the second ground point F and the second free end D. Optionally, the resonant current of the second resonant mode can flow from the second free end D to the second ground point F. Due to the periodicity of the current, the resonant current of the second resonant mode can also flow from the second ground point F to the second free end D.

[0099] The second resonant mode is a quarter-wavelength mode of the MB band. In other words, the electrical length of the second radiator 202 is close to one-quarter of the wavelength of the center frequency of the MB band. The second antenna element 20 provided in this embodiment is an IFA antenna. The second resonant mode is a quarter-wavelength mode. The quarter-wavelength mode is the fundamental mode of the IFA antenna and has relatively high efficiency, ensuring that the second antenna element 20 has relatively high efficiency when operating in the MB band.

[0100] Optionally, the target frequency band may also include the HB band. The HB band is 2300MHz-2690MHz. For example, the HB band includes at least one of the B40 band and the B41 band.

[0101] Please see Figure 13 The second signal source 201 excites the second radiator 202 and the first radiator 102 to form a third resonant mode supporting the HB band. Because the first radiator 102 has a relatively long branch length and is coupled to the second radiator 202, when the resonant current of the third resonant mode is generated on the second radiator 202, a strong current is simultaneously generated on the first radiator 102. The resonant current of the third resonant mode is distributed between the second feed point E and the second free end D, and between the first free end C and the first ground point A. The resonant current between the second feed point E and the second free end D has the same direction as the resonant current between the first free end C and the first ground point A. Optionally, the resonant current of the third resonant mode can flow from the first ground point A to the first free end C, and from the second free end D to the second feed point E. Due to the periodicity of the current, the resonant current of the third resonant mode can also flow from the second feed point E to the second free end D, and from the first free end C to the first ground point A.

[0102] In this embodiment, the equivalent electrical length between the second feed point E and the second free end D, and between the first free end C and the first ground point A, is close to 1 / 4 wavelength of the center frequency of the HB band, so that a 1 / 4 wavelength mode supporting the HB band is formed on the second radiator 202 between the second feed point E and the second free end D, and on the first radiator 102 between the first free end C and the first ground point A.

[0103] Optionally, the target frequency band may also include the UHB band. The UHB band is a frequency band greater than 2690MHz. For example, the UHB band includes, but is not limited to, at least one of the N78 band and the N79 band.

[0104] Optional, please refer to Figure 14The second signal source 201 excites the second radiator 202 to form a fourth resonant mode supporting the UHB band. The resonant current of the fourth resonant mode is distributed between the second feed point E and the second free end D. The resonant current of the fourth resonant mode can flow from the second feed point E to the second free end D, or from the second free end D to the second feed point E. The fourth resonant mode is a 1 / 4 wavelength mode of the UHB band. In this embodiment, the second feed point E to the second free end D of the second antenna unit 20 is a monopole antenna. The second resonant mode is a 1 / 4 wavelength mode. The 1 / 4 wavelength mode is the fundamental mode of the monopole antenna and has relatively high efficiency, ensuring that the second antenna unit 20 has relatively high efficiency when operating in the UHB band.

[0105] The first antenna unit 10 and the second antenna unit 20 provided in this application embodiment are designed with respect to the electrical length of the first radiator 102, the electrical length of the second radiator 202, the position of the first feed point B, the position of the second feed point E, and the first matching circuit M1 and the second matching circuit M2. This design enables the first antenna unit 10 to form a first resonant mode to support GPS-L5 (or GPS-L5+LB band), and enables the second antenna unit 20 to form a second resonant mode, a third resonant mode, and a fourth resonant mode to support MB band + HB band + N78 band. This achieves coverage of multiple frequency bands while increasing the proportion of GPS-L5 in the upper hemisphere and improving the radiation efficiency of GPS-L5.

[0106] The specific structure of the second matching circuit M2 will be illustrated below with reference to the attached diagram.

[0107] Please see Figure 15 The second matching circuit M2 includes a switching branch Q. The switching branch Q includes a switching unit Q1 and multiple switching branches. One end of the switching unit Q1 is electrically connected to the second feed point E, and the other end of the switching unit Q1 is used to turn on at least one of the multiple switching branches. The switching unit Q1 includes, but is not limited to, a switching transistor, a MOSFET, or a transistor. The switching unit Q1 can form a single conduction path between the second feed point E and the multiple switching branches, or it can form multiple conduction paths.

[0108] The other end of each of the multiple switching branches is grounded and / or electrically connected to the second signal source 201. The switching branch Q is used to switch sub-bands in the target frequency band. For example, the switching branch Q is used to switch sub-bands in the MHB frequency band. For instance, the switching branch Q is used to switch to at least one of the B1, B3, B40, and B41 frequency bands.

[0109] For example, please see Figure 15The switching unit Q1 includes a first electrical connection point W1, a second electrical connection point W2, a third electrical connection point W3, a fourth electrical connection point W4, and a fifth electrical connection point W5. The first electrical connection point W1 is electrically connected to the second feed point E. Please refer to [link / reference]. Figure 15 The multiple switching branches include a first switching branch R1, a second switching branch R2, a third switching branch R3, and a fourth switching branch R4. The second electrical connection point W2 is connected to the first switching branch R1. The third electrical connection point W3 is connected to the second switching branch R2, the fourth electrical connection point W4 is connected to the third switching branch R3, and the fifth electrical connection point W5 is connected to the fourth switching branch R4. Under the control of the electronic device 1000, the switching unit Q1 can enable the first electrical connection point W1 to conduct with one or more of the following electrical connection points: the second electrical connection point W2, the third electrical connection point W3, the fourth electrical connection point W4, and the fifth electrical connection point W5.

[0110] Please see Figure 15 The second matching circuit M2 further includes a third capacitor element C3. One end of the third capacitor element C3 is electrically connected to the second feed point E, and the other end is electrically connected to the second signal source 201. The capacitance value of the third capacitor element C3 is less than a first preset capacitance value. This application does not specifically limit the first preset capacitance value. Optionally, the first preset capacitance value is a small capacitance threshold relative to the MB frequency band, for example, the first preset capacitance value is 2pF, 3pF, etc. The third capacitor element C3 is a small capacitance relative to the MB frequency band. For example, the capacitance value of the third capacitor element C3 is 1pF, but it is not limited to this value. The third capacitor element C3 is used to tune the second radiator 202 to support the MB frequency band, which is beneficial for the second antenna unit 20 to tune to a second resonant mode that supports the MB frequency band.

[0111] Optionally, the plurality of switching branches include at least one series branch. The end of the series branch furthest from the switching unit Q1 is electrically connected to the second signal source 201. For example, one end of the series branch is electrically connected to the second electrical connection point W2, and the other end is electrically connected to the second signal source 201. When the second electrical connection point W2 is connected to the first electrical connection point W1, the series branch is connected in series between the second signal source 201 and the second feed point E. Optionally, the series branch may be the first switching branch R1 described above.

[0112] The target frequency band includes at least one HB band. In this embodiment, the HB band includes, but is not limited to, the B40 band.

[0113] Please see Figure 15When the second antenna unit 20 operates in the HB band, the switching unit Q1 connects the second feed point E to at least one of the series branches, i.e., the second electrical connection point W2 is connected to the first electrical connection point W1. The series branch connected to the second feed point E includes a fourth capacitor element C4. The capacitance value of the fourth capacitor element C4 is greater than a second preset capacitance value, or the series branch connected to the second feed point E is a short-circuit branch to increase the capacitance of the feed series, which is beneficial for tuning to support a larger HB band, such as the B40 band. This application does not specifically limit the second preset capacitance value. Optionally, the second preset capacitance value is a large capacitance threshold relative to the HB band, for example, the second preset capacitance value is 8pF, 9pF, etc. The fourth capacitor element C4 is a large capacitance relative to the HB band, and the series branch is a short circuit relative to the HB band; of course, the series branch can also be a 0-ohm short-circuit branch directly to ground. For example, the capacitance of the fourth capacitor element C4 is 10pF, but it is not limited to this value. The fourth capacitor element C4 is used to tune the second radiator 202 to support a larger HB frequency band, such as the B40 frequency band, which facilitates the second antenna unit 20 to tune to a third resonant mode that supports the B40 frequency band.

[0114] The plurality of switching branches also includes at least one parallel branch. The end of the parallel branch furthest from the switching unit Q1 is grounded. The parallel branch includes an inductive element and / or a capacitive element. Optionally, the second switching branch R2, the third switching branch R3, and the fourth switching branch R4 are all parallel branches with their ends grounded, furthest from the switching unit Q1. The impedance values ​​of the second switching branch R2, the third switching branch R3, and the fourth switching branch R4 are different.

[0115] For example, the second switching branch R2 includes a capacitor with a capacitance of 0.5pF, but is not limited to this value. The third switching branch R3 includes an inductor with an inductance of 7nH, but is not limited to this value. The fourth switching branch R4 includes an inductor with an inductance of 20nH, but is not limited to this value. The above are examples of the second switching branch R2, the third switching branch R3, and the fourth switching branch R4, but are not limited to the above embodiments.

[0116] Optional, please refer to Figure 15The second matching circuit M2 further includes a fifth capacitor element C5. One end of the fifth capacitor element C5 is electrically connected to the second feed point E, and the other end is grounded. The fifth capacitor element C5 is used to adjust the electrical length of the second radiator 202 so that the effective electrical length of the second radiator 202 matches the frequency band supported by the second antenna unit 20, making it easier to form a second resonant mode, a third resonant mode, and a fourth resonant mode on the second radiator 202. This application does not specifically limit the capacitance value of the fifth capacitor element C5. For example, the capacitance value of the fifth capacitor element C5 is 0.3pF, but it is not limited to this value.

[0117] Please see Figure 16 , Figure 16 yes Figure 4 The S-parameter curves of the first antenna element 10 and the second antenna element 20. Figure 16 Curve a is the S-parameter curve of the first antenna element 10. Figure 16 Curve b is the S-parameter curve of the second antenna element 20. From curve a, it can be seen that the first antenna element 10 supports the GPS-L5 frequency band, and from curve b, it can be seen that the second antenna element 20 supports the MB+HB+N78 frequency band. Thus, the first antenna module 100a can simultaneously support the GPS-L5+MB+HB+N78 frequency band.

[0118] Please see Figure 17 , Figure 17 yes Figure 4 The radiation efficiency curves and overall efficiency curves of the first antenna element 10 and the second antenna element 20 are shown. Curve a represents the radiation efficiency curve of the first antenna element 10, curve b represents the overall efficiency curve of the first antenna element 10, curve c represents the radiation efficiency curve of the second antenna element 20, and curve d represents the overall efficiency curve of the second antenna element 20. From the radiation efficiency curves and overall efficiency curves of the first antenna element 10 and the second antenna element 20, it can be seen that the first antenna element 10 has relatively good efficiency in the GPS-L5 frequency band. The second antenna element 20 also exhibits good efficiency in the MB, HB, and N78 frequency bands.

[0119] Please see Figure 18 , Figure 18 These are the S-parameter curves of the switching unit Q1 in the second antenna unit 20 of this application embodiment when it switches to different states. From Figure 18 As can be seen from this, curve a is Figure 15When the fourth electrical connection point W4 and the first electrical connection point W1 are connected, the S-parameters are determined. When the switching unit Q1 is switched to this state, the second antenna unit 20 has a resonant point between 2.1 GHz, so the second antenna unit 20 can support the B1 frequency band. In addition, the second antenna unit 20 has a resonant point near 3.6 GHz, so the second antenna unit 20 can support the N78 frequency band.

[0120] Curve b is Figure 15 When the first electrical connection point W1 is disconnected from the second electrical connection point W2, the third electrical connection point W3, the fourth electrical connection point W4, and the fifth electrical connection point W5, the S-parameters of the second antenna unit 20 are all disconnected. When the switching unit Q1 is switched to this state, the second antenna unit 20 has resonant points near 1.7GHz, 2.6GHz, and 3.5GHz. Therefore, the second antenna unit 20 can support the B3+B41+N78 frequency band.

[0121] Curve c is Figure 15 The S-parameters of the second antenna unit 20 when the first electrical connection point W1 is electrically connected to the second electrical connection point W2 and the fifth electrical connection point W5 are shown. When the switching unit Q1 is switched to this state, the second antenna unit 20 has a resonant point near 2.4GHz, so the second antenna unit 20 can support the B40 frequency band. The above three switching states of the switching unit Q1 are examples, and the switching unit Q1 also includes other switching states. As can be seen from the above, the second antenna unit 20 provided in this application can better cover all frequency bands of MHB and the N78 frequency band by switching the switching unit Q1 to different conduction states.

[0122] In meeting the Specific Absorption Rate (SAR) standard for electromagnetic waves, electronic device 1000 typically achieves SAR compliance by controlling the power back-off of the antenna element when a person approaches it. How to implement SAR hotspot coverage detection on electronic device 1000 is a technical problem that needs to be solved.

[0123] In this embodiment, the second radiator 202 is also used as the detection electrode for detecting SAR hotspot coverage. The specific implementation method is as follows:

[0124] Optional, please refer to Figure 19 The second antenna unit 20 further includes a sixth capacitor element C6. One end of the sixth capacitor element C6 is electrically connected to the second grounding point F, and the other end of the sixth capacitor element C6 is grounded, so that the second radiator 202 can also be used as a detection electrode for SAR value adjustment.

[0125] The sixth capacitor element C6 is a large capacitor. It is a DC blocking capacitor, isolating DC signals or small AC signals. It acts as an open circuit for DC signals or small AC signals. The second grounding point F of the second radiator 202 is grounded through the sixth capacitor element C6. The second feed point E of the second radiator 202 is connected to the second signal source 201 through the third capacitor element C3. Thus, both the sixth capacitor element C6 and the third capacitor element C3 isolate DC signals or small AC signals, making the second radiator 202 appear to float relative to the DC signals or small AC signals.

[0126] Please see Figure 19 The electronic device 1000 further includes a detection circuit 60. The detection circuit 60 is electrically connected to the second radiator 202 and is used to detect whether the subject under test is close to the second radiator 202 and the area near the second radiator 202. Optionally, the detection circuit 60 may be electrically connected to the second feed point E.

[0127] In this application, the second radiator 202 is located at the corner, enabling it to be used for proximity detection within a certain angle range corresponding to the top edge 321 and the first side edge 323.

[0128] Furthermore, the second radiator 202 and the detection circuit 60 form a proximity sensor for detecting whether the subject under test is approaching. Furthermore, the detection circuit 60 is provided with a large AC-blocking inductor (e.g., an inductance of 82nH) at the location where it is electrically connected to the second radiator 202 to prevent high-frequency AC signals from flowing to the second radiator 202.

[0129] When a hand or head approaches the second radiator 202, the second radiator 202 senses the capacitance change caused by the approach of the human body to determine the human body's proximity. After determining that the human body is close, the controller reduces the transmission power of the second antenna unit 20 and / or the antenna units near the second antenna unit 20, thereby achieving the purpose of intelligent SAR reduction.

[0130] The above describes an implementation where the second radiator 202 also functions as a proximity sensor to detect whether the subject is approaching. In other implementations, other radiators can be designed to be suspended and thus used as proximity sensors to detect whether the subject is approaching.

[0131] The third antenna unit 30 provided in this application supports the GPS-L1 + Wi-Fi 2.4G band. Specifically, the third signal source 301 excites the third radiator 302 to generate a left-handed mode from the third free end I to the third ground point G, supporting the GPS-L1 band. The third signal source 301 excites the third radiator 302 to generate an IFA mode from the third free end I to the third ground point G, supporting the Wi-Fi 2.4G band. The fourth signal source 401 excites the fourth radiator 402 to generate an IFA mode from the fourth free end J to the fourth ground point O, supporting the N78 band. The fourth signal source 401 excites the fourth radiator 402 to generate a dual-wavelength mode from the fourth free end J to the fourth feed point K, and a 3 / 4 wavelength mode from the third free end I to the third ground point G, supporting the Wi-Fi 5G band.

[0132] In this embodiment, the positions of the third antenna unit 30 and the fourth antenna unit 40 can be interchanged. In addition, the positions of the first antenna module 100a and the second antenna module 100b can be interchanged.

[0133] In this application, the antenna supporting GPS-L1 (hereinafter referred to as the L1 antenna) and the antenna supporting GPS-L5 (hereinafter referred to as the L5 antenna) are designed separately. This ensures that the GPS-L5 antenna and the GPS-L1 antenna do not interfere with each other. Meanwhile, the GPS-L5 antenna achieves an efficiency of 8dB and an upper hemisphere energy share of over 50%, meeting usage requirements. The GPS-L1 antenna achieves an efficiency of approximately -4.5dB and an upper hemisphere energy share of over 50%, ensuring accurate positioning. Through the matching design of the L5 antenna, the MHB+N78 antenna and the GPS-L5 antenna do not affect each other. The matching circuit of the MHB+N78 antenna uses a series switch, which increases the series capacitance and facilitates B40 band tuning.

[0134] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, and such improvements and refinements are also considered to be within the protection scope of this application.

Claims

1. An electronic device, characterized in that, The first antenna module includes a first antenna module and a second antenna module, both independently configured and located on the top of the electronic device. The first antenna module includes: A first antenna element, comprising a first signal source, a first radiator, and a first matching circuit, wherein the first radiator includes a first ground point, a first feed point, and a first free end arranged sequentially, the first signal source being electrically connected to the first feed point for exciting the first radiator to support at least a first GPS frequency band, the first matching circuit including a bandpass circuit, one end of the bandpass circuit being electrically connected to the first feed point, the other end of the bandpass circuit being grounded, the bandpass circuit being in a band-stop state for the first GPS frequency band, and the first ground point being grounded; and The second antenna element includes a second signal source and a second radiator. The second radiator includes a second free end, a second feed point, and a second ground point arranged sequentially. The second free end is coupled to the first free end through a gap. The second ground point is grounded. The second signal source is electrically connected to the second feed point to excite the second radiator to support the target frequency band. The minimum frequency of the target frequency band is greater than the maximum frequency of the first GPS frequency band. The bandpass circuit is in a bandpass state for the target frequency band. The second antenna module is located on the side of the first antenna unit away from the second antenna unit, and the first grounding point is located between the first free end and the second antenna module. The second antenna module is used to support the second GPS frequency band.

2. The electronic device as claimed in claim 1, characterized in that, The first matching circuit further includes a band-stop circuit, one end of which is electrically connected to the first feed point, and the other end of which is electrically connected to the first signal source. The band-stop circuit is in a band-stop state for the target frequency band and in a band-pass state for the first GPS frequency band.

3. The electronic device as described in claim 2, characterized in that, The circuit with resistance includes a first inductor, one end of which is electrically connected to the first feed point, and the other end of which is electrically connected to the first signal source.

4. The electronic device as claimed in claim 1, characterized in that, The bandpass circuit includes a second inductor, a third inductor, and a first capacitor. One end of the second inductor is electrically connected to the first feed point, and the other end of the second inductor is electrically connected to one end of the first capacitor. The other end of the first capacitor is grounded. One end of the third inductor is electrically connected to the first feed point, and the other end of the third inductor is grounded.

5. The electronic device as claimed in claim 1, characterized in that, The first matching circuit further includes a second capacitor element, one end of which is electrically connected to the first feed point, and the other end of which is grounded. The second capacitor element is used to adjust the electrical length of the first radiator and to conduct the target frequency band to ground.

6. The electronic device as claimed in claim 1, characterized in that, The first signal source excites the first radiator to form a first resonant mode supporting the first GPS frequency band. The resonant current of the first resonant mode is distributed between the first free end and the first ground point. The first resonant mode is a 1 / 4 wavelength mode of the first GPS frequency band.

7. The electronic device as claimed in claim 1, characterized in that, The first signal source excites the first radiator to support the LB band; the first matching circuit further includes a tuning circuit, wherein the equivalent capacitance of the tuning circuit to the LB band is less than the equivalent capacitance of the tuning circuit to the first GPS band.

8. The electronic device as claimed in claim 1, characterized in that, The target frequency band includes the MB frequency band. The second signal source excites the second radiator to form a second resonant mode that supports the MB frequency band. The resonant current of the second resonant mode is distributed between the second grounding point and the second free end. The second resonant mode is a 1 / 4 wavelength mode of the MB frequency band.

9. The electronic device as claimed in claim 1, characterized in that, The target frequency band also includes the HB frequency band. The second signal source excites the second radiator and the first radiator to form a third resonant mode that supports the HB frequency band. The resonant current of the third resonant mode is distributed between the second feed point and the second free end, and between the first free end and the first ground point. The resonant current between the second feed point and the second free end has the same direction as the resonant current between the first free end and the first ground point.

10. The electronic device as claimed in claim 1, characterized in that, The target frequency band also includes the UHB frequency band. The second signal source excites the second radiator to form a fourth resonant mode that supports the UHB frequency band. The resonant current of the fourth resonant mode is distributed between the second feed point and the second free end. The fourth resonant mode is a 1 / 4 wavelength mode of the UHB frequency band.

11. The electronic device according to any one of claims 1-10, characterized in that, The second antenna unit further includes a second matching circuit. One end of the second matching circuit is electrically connected to the second feed point, and the other end of the second matching circuit is electrically connected to the second signal source. The second matching circuit includes a switch branch Q2, which includes a switch unit and multiple switch branches. One end of the switch unit is electrically connected to the second feed point, and the other end of the switch unit is used to turn on at least one of the multiple switch branches. The other ends of the multiple switch branches are grounded and / or electrically connected to the second signal source. The switch branch Q2 is used to switch sub-bands in the target frequency band.

12. The electronic device as claimed in claim 11, characterized in that, The second matching circuit further includes a third capacitor element, one end of which is electrically connected to the second feed point, and the other end of which is electrically connected to the second signal source. The capacitance value of the third capacitor element is less than a first preset capacitance value. The third capacitor element is used to tune the second radiator to support the MB band.

13. The electronic device as claimed in claim 11, characterized in that, The plurality of switching branches include at least one series branch, the end of which, away from the switching unit, is electrically connected to the second signal source; The target frequency band includes at least one HB frequency band. When the second antenna unit operates in the HB frequency band, the switching unit connects the second feed point to at least one of the series branches. The series branch connected to the second feed point includes a fourth capacitor element. The capacitance value of the fourth capacitor element is greater than a second preset capacitance value. Alternatively, the series branch connected to the second feed point is a short-circuit branch.

14. The electronic device as claimed in claim 11, characterized in that, The plurality of switching branches also include at least one parallel branch, the end of which is grounded away from the switching unit, and the parallel branch includes an inductive element and / or a capacitive element.

15. The electronic device as claimed in claim 11, characterized in that, The second matching circuit further includes a fifth capacitor element, one end of which is electrically connected to the second feed point, and the other end of which is grounded. The fifth capacitor element is used to adjust the electrical length of the second radiator.

16. The electronic device according to any one of claims 1-10, characterized in that, The second antenna unit further includes a sixth capacitor element, one end of which is electrically connected to the second grounding point, and the other end of which is grounded, so that the second radiator can also be used as a detection electrode for SAR value adjustment.

17. The electronic device according to any one of claims 1-10, characterized in that, The second antenna module includes a third antenna element and a fourth antenna element; The third antenna unit includes a third signal source and a third radiator. The third radiator includes a third grounding point, a third feed point and a third free end arranged in sequence. The third grounding point is grounded, and the third signal source is electrically connected to the third feed point to excite the third radiator to support the second GPS frequency band and the first Wi-Fi frequency band. The fourth antenna unit includes a fourth signal source and a fourth radiator. The fourth radiator includes a fourth free end, a fourth feed point, and a fourth ground point arranged sequentially. The fourth free end is coupled to the third free end through a gap. The fourth ground point is grounded. The fourth signal source is electrically connected to the fourth feed point to excite the fourth radiator to support the second Wi-Fi band and the UHB band.

18. The electronic device as claimed in claim 17, characterized in that, The electronic device further includes a frame and a reference ground. The frame includes a top edge, a first side edge, a bottom edge, and a second side edge connected in sequence. The reference ground is disposed within the area enclosed by the frame. The first radiator is disposed on the top edge to excite a transverse current mode on the reference ground. The transverse current mode is a current mode with the current direction parallel to the top edge. A portion of the second radiator is disposed on the top edge, and another portion of the second radiator is disposed on the first side edge.

19. The electronic device as claimed in claim 18, characterized in that, A portion of the third radiator is located on the top edge, and another portion of the third radiator is located on the second side edge. The feed point of the third radiator is located on the top edge to excite a transverse current mode on the reference floor. The fourth radiator is located on the top edge.

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