Electronic device

Abstract

The application provides an electronic device, a radiator is arranged on a first side of a frame, the radiator comprises a first ground terminal, a feed point and a first free end arranged in sequence; a signal source is electrically connected to the feed point, the signal source is used to provide an excitation signal of a satellite communication frequency band, a resonant structure is arranged on at least one of a side where a top edge is located, a side where the first side is located and a side where a second side is located, the resonant structure comprises a second ground terminal and a second free end, a direction in which the first ground terminal points to the first free end is the same as or does not intersect with a direction in which the second ground terminal points to the second free end; the signal source is used to excite a first resonant mode on the radiator to support a first frequency band, and to excite a floor current formed on a reference floor, the resonant structure forms a second resonant mode to support a second frequency band at least under the excitation of the floor current, a center frequency point of the first frequency band is greater than or equal to a center frequency point of the second frequency band, and good satellite communication is achieved.

Description

Technical Field

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

[0002] When designing antennas on electronic devices to implement satellite communication functions (such as Tiantong satellite communication and Beidou satellite communication), how to achieve good satellite communication for electronic devices becomes a technical problem that needs to be solved. Summary of the Invention

[0003] This application provides an electronic device for achieving good satellite communication.

[0004] An electronic device provided in this application includes:

[0005] The reference floor includes the first floor edge, the second floor edge, the third floor edge, and the fourth floor edge connected in sequence;

[0006] A frame surrounds the periphery of the reference floor. The frame includes a top edge, a first side edge, a bottom edge, and a second side edge that are connected to each other. The top edge is opposite to and spaced apart from the first floor edge. The first side edge is opposite to and spaced apart from the second floor edge. The second side edge is opposite to and spaced apart from the third floor edge. The bottom edge is opposite to and spaced apart from the fourth floor edge.

[0007] Antenna assembly, the antenna assembly comprising:

[0008] A radiator is disposed on the first side. The radiator includes a first grounding terminal, a feed point and a first free end arranged in sequence. The first grounding terminal is electrically connected to the reference ground. The direction of the first grounding terminal pointing to the first free end is the same as or does not intersect with the direction of the second grounding terminal pointing to the second free end.

[0009] A signal source, electrically connected to the feed point, is used to provide an excitation signal for the satellite communication frequency band; and

[0010] At least one resonant structure is provided on at least one of the top edge, the first side edge, and the second side edge, and the resonant structure includes a second grounding terminal and a second free terminal, wherein the second grounding terminal is electrically connected to the reference ground.

[0011] The signal source is used to excite the radiator to form a first resonant mode supporting a first frequency band and to excite the reference ground to form a ground current. The resonant structure forms a second resonant mode supporting a second frequency band at least under the excitation of the ground current. The center frequency of the first frequency band is greater than or equal to the center frequency of the second frequency band.

[0012] The electronic device provided in this application is designed with a radiator located on the first side of a frame. The radiator includes a first ground terminal, a feed point, and a first free terminal arranged sequentially. The first ground terminal is electrically connected to a reference ground. A signal source is electrically connected to the feed point and is used to provide an excitation signal for the satellite communication frequency band. A resonant structure is located on at least one of the top edge, the first side, and the second side. The resonant structure includes a second ground terminal and a second free terminal. The second ground terminal is electrically connected to the reference ground. The direction from the first ground terminal to the first free terminal is the same as or does not intersect with the direction from the second ground terminal to the second free terminal. The signal source is used to excite the radiator to form a first resonant mode supporting the first frequency band and to excite the reference ground to form a ground current. The resonant structure forms a second resonant mode supporting the second frequency band at least under the excitation of the ground current. The center frequency of the first frequency band is greater than or equal to the center frequency of the second frequency band. Through the above design, the radiator and the resonant structure resonate. The resonant structure is used to change the current distribution on the reference ground, thereby tuning the radiation pattern of the antenna assembly and achieving good satellite communication. Attached Figure Description

[0013] 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.

[0014] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0015] Figure 2 This is a partially exploded view of the electronic device provided in the embodiments of this application;

[0016] Figure 3 This is a partial schematic diagram of the back cover side of the electronic device provided in the embodiments of this application;

[0017] Figure 4 This is a partial schematic diagram of the first antenna assembly and reference ground provided in the embodiments of this application;

[0018] Figure 5 This is a schematic diagram of the matching circuit provided in an embodiment of this application;

[0019] Figure 6 This is a partial schematic diagram of the second type of antenna assembly and reference ground provided in the embodiments of this application;

[0020] Figure 7 This is a schematic diagram of the antenna assembly including the tuning circuit provided in the embodiments of this application;

[0021] Figure 8 This is a schematic diagram of a tuning circuit provided in an embodiment of this application;

[0022] Figure 9This is a schematic diagram of the matching circuit and tuning circuit provided in the embodiments of this application;

[0023] Figure 10 This is the total field pattern of the radiator in an antenna array without a resonant structure provided in the embodiments of this application;

[0024] Figure 11 This is the 2D radiation pattern of the radiator in the antenna array without a resonant structure provided in the embodiments of this application;

[0025] Figure 12 This is the left-hand circular polarization pattern of the radiator in the antenna array without a resonant structure provided in the embodiments of this application;

[0026] Figure 13 The embodiment of this application provides a total field pattern in which the first resonant structure and the radiator are both located on the first side, and the second free end of the first resonant structure and the first free end of the radiator both face the top edge.

[0027] Figure 14 This application embodiment provides a different total field pattern where both the first resonant structure and the radiator are located on the first side, and the second free end of the first resonant structure and the first free end of the radiator are both facing the top edge.

[0028] Figure 15 The embodiment of this application provides a left-hand circular polarization pattern in which the first resonant structure and the radiator are both located on the first side, and the second free end of the first resonant structure and the first free end of the radiator both face the top edge.

[0029] Figure 16 This is a 2D orientation pattern of left-hand circular polarization provided in the embodiments of this application, in which the first resonant structure and the radiator are both disposed on the first side and the second free end of the first resonant structure and the first free end of the radiator are both facing the top edge.

[0030] Figure 17 The embodiment of this application provides a total field pattern in which the first resonant structure and the radiator are both located on the first side, and the second free end of the first resonant structure and the first free end of the radiator both face the bottom edge.

[0031] Figure 18 The first resonant structure and the radiator provided in this application embodiment are both disposed on the first side, and the second free end of the first resonant structure and the first free end of the radiator are both facing the bottom edge in a 2D orientation pattern.

[0032] Figure 19 This is a schematic diagram of the first resonant structure and the radiator located on the same side of the rotation according to an embodiment of this application;

[0033] Figure 20This is the total field radiation diagram of the antenna group without a resonant structure in the foldable device provided in this application embodiment;

[0034] Figure 21 The total field radiation direction of the first resonant structure and the radiator in the foldable device provided in this application embodiment is located on the same side of the rotation. Figure 1 ;

[0035] Figure 22 The total field radiation direction of the first resonant structure and the radiator in the foldable device provided in this application embodiment is located on the same side of the rotation. Figure 2 ;

[0036] Figure 23 The total field radiation direction of the antenna array without a resonant structure in the foldable device provided in this application embodiment is... Figure 3 ;

[0037] Figure 24 This is the left-hand circularly polarized radiation pattern of the antenna array without a resonant structure in the foldable device provided in this application embodiment;

[0038] Figure 25 The total field radiation direction of the first resonant structure and the radiator in the foldable device provided in this application embodiment is located on the same side of the rotation. Figure 2 ;

[0039] Figure 26 This is a left-handed circularly polarized field radiation pattern in the foldable device provided in this application embodiment, where the first resonant structure and the radiator are located on the same side of the rotation.

[0040] Figure 27 This is a total field radiation diagram of the antenna array without a resonant structure near the head in the foldable device provided in this application embodiment;

[0041] Figure 28 This is a total field radiation diagram of the first resonant structure and the radiator in the foldable device provided in the embodiments of this application, which are located on the same side of the rotation.

[0042] Figure 29 This is a schematic diagram of a structure with a resonant structure on the top edge, provided in an embodiment of this application.

[0043] Figure 30 This is the total field pattern of the second resonant structure and the radiator provided in the embodiments of this application;

[0044] Figure 31 This is a left-handed circularly polarized 3D radiation pattern of the second resonant structure and the radiator provided in the embodiments of this application;

[0045] Figure 32 This is a left-handed circularly polarized 2D radiation pattern of the second resonant structure and the radiator provided in the embodiments of this application;

[0046] Figure 33 This is a schematic diagram of the current distribution of the radiator and the reference ground in an antenna array without a resonant structure provided in an embodiment of this application;

[0047] Figure 34 This is a schematic diagram of the current distribution of the second resonant structure, radiator, and reference ground provided in the embodiments of this application;

[0048] Figure 35 This is a diagram showing the upper hemisphere radiation ratio of an antenna array without a resonant structure provided in an embodiment of this application.

[0049] Figure 36 This is a diagram showing the upper hemisphere radiation ratio of the antenna group formed by the second resonant structure at the top edge and the radiator in the embodiment of this application.

[0050] Figure 37 This is a schematic diagram of the antenna array provided in the embodiments of this application, which simultaneously includes a first resonant structure and a second resonant structure;

[0051] Figure 38 This is the total field pattern of the first resonant structure, the second resonant structure, and the radiator provided in the embodiments of this application;

[0052] Figure 39 This is a left-handed circularly polarized 3D pattern of the first resonant structure, the second resonant structure, and the radiator provided in the embodiments of this application;

[0053] Figure 40 This is a left-handed circularly polarized 2D pattern of the first resonant structure, the second resonant structure, and the radiator provided in the embodiments of this application;

[0054] Figure 41 This is a schematic diagram of the current distribution of the first resonant structure, the second resonant structure, the radiator, and the reference ground provided in the embodiments of this application;

[0055] Figure 42 This is a diagram showing the upper hemisphere radiation ratio of the antenna group formed by the first resonant structure, the second resonant structure, and the radiator in the embodiments of this application.

[0056] Figure 43 This is a schematic diagram of a structure with a resonant structure on the second side provided in an embodiment of this application;

[0057] Figure 44 This is a schematic diagram of the structure provided in this application embodiment, showing that the direction of the second grounding terminal of the third resonance pointing to the second free end is the same as the direction of the first grounding terminal A1 of the radiator pointing to the first free end;

[0058] Figure 45This is a partial schematic diagram of an antenna assembly disposed in a foldable device according to an embodiment of this application;

[0059] Figure 46 This is the total field pattern of the first resonant structure, the second resonant structure, and the radiator in the foldable device provided in this application embodiment, all located on the same side of the rotation.

[0060] Figure 47 This is a left-handed circularly polarized 3D radiation pattern of the first resonant structure, the second resonant structure, and the radiator in the foldable device provided in this application embodiment, all located on the same side of the rotation.

[0061] Figure 48 This is a left-handed circularly polarized 2D radiation pattern of the first resonant structure, the second resonant structure, and the radiator in the foldable device provided in this application embodiment, all located on the same side of the rotation.

[0062] Figure 49 This is a schematic diagram of the current distribution of the first resonant structure, the second resonant structure, and the radiator in the foldable device provided in this application embodiment, all located on the same side of the rotating body;

[0063] Figure 50 This is a diagram showing the radiation ratio of the upper hemisphere in the foldable device provided in this application embodiment, where the first resonant structure, the second resonant structure, and the radiator are located on the same side of the rotation.

[0064] Figure 51 This is a schematic diagram of another antenna assembly provided in this application embodiment disposed on a folding device;

[0065] Figure 52 This is a schematic diagram of the second type of first resonant structure provided in the embodiments of this application;

[0066] Figure 53 This is a schematic diagram of the structure of the antenna assembly provided in the embodiments of this application, which also includes a second signal source and a first switching unit;

[0067] Figure 54 This is a schematic diagram showing that the antenna assembly provided in this application embodiment also includes a third signal source and a second switching unit;

[0068] Figure 55 This is a schematic diagram showing that the antenna assembly provided in this application embodiment also includes a fourth signal source and a third switching unit;

[0069] Figure 56 The antenna assembly provided in this application embodiment also includes a fifth signal source and a fourth switching unit. Detailed Implementation

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] Please see Figure 2 , Figure 2This is a partially exploded view of electronic device 1000. The electronic device 1000 includes an antenna assembly 100. Taking a mobile phone as an example, the working environment of the antenna assembly 100 is illustrated. 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 frame 320 may be a conductive frame. Of course, in other embodiments, the electronic device 1000 may not have a 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 the mid-plate 310, and between the mid-plate 310 and the 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 of the frame 320 surrounds the edge of the back cover 400, forming a complete appearance structure of the electronic device 1000. In this embodiment, the frame 320 and the middle plate 310 are an integral structure, while the frame 320 and the back cover 400 can be separate structures. The above describes the working environment of the antenna assembly 100 taking a mobile phone as an example, but the antenna assembly 100 of this application is not limited to the above working environment.

[0075] Please see Figure 3 , Figure 3 The image shows the rear view of the electronic device 1000. The frame 320 includes a top edge 321 and a bottom edge 323 disposed opposite to each other, and a first side edge 322 and a second side edge 324 connecting the top edge 321 and the bottom edge 323. The top edge 321 is the side away from the ground when the user holds and uses the electronic device 1000 in portrait mode, and the bottom edge 323 is the side facing the ground when the user holds and uses the electronic device 1000 in portrait mode. The first side edge 322 is the left side when the user holds and uses the electronic device 1000 in portrait mode. The second side edge 324 is the right side when the user holds and uses the electronic device 1000 in portrait mode. Alternatively, the first side edge 322 can also be the right side when the user holds and uses the electronic device 1000, and the second side edge 324 can be the left side when the user holds and uses the electronic device 1000.

[0076] Optional, please refer to Figure 3The electronic device 1000 also includes a reference ground plane 500. The reference ground plane 500 is located within the frame 320. The reference ground plane 500 is generally rectangular in shape. Various slots, holes, etc., are formed on the reference ground plane 500's reference ground edge as needed to accommodate components or avoid other structures within the mobile phone. The reference ground plane 500 includes, but is not limited to, the metal alloy portion of the middle plate 310 and the reference ground metal portion of the circuit board (including the main board 600 and sub-boards). In general, the reference ground system in the electronic device 1000 can be equivalent to a roughly rectangular shape, hence the name reference ground plane 500. However, the term "reference ground plane 500" does not imply that the reference ground is plate-shaped or a rectangular plate.

[0077] Please see Figure 3 The reference floor 500 includes a first floor edge 511, a second floor edge 512, a third floor edge 513, and a fourth floor edge 514 connected sequentially. The first floor edge 511 is opposite to and spaced apart from the top edge 321, and the second floor edge 512 is opposite to and spaced apart from the first side edge 322. The third floor edge 513 is opposite to and spaced apart from the bottom edge 323, and the fourth floor edge 514 is opposite to and spaced apart from the second side edge 324.

[0078] Optionally, the length of the first floor edge 511 is similar to or equal to the length of the third floor edge 513. The length of the second floor edge 512 is similar to or equal to the length of the fourth floor edge 514. The first floor edge 511 and the third floor edge 513 are the shorter sides of the reference floor 500. The second floor edge 512 and the fourth floor edge 514 are the longer sides of the reference floor 500.

[0079] The specific structure of the antenna assembly 100 is illustrated below with reference to the accompanying drawings.

[0080] Please see Figure 3 and Figure 4 The antenna assembly 100 includes a radiator 10, a first signal source 20, and at least one resonant structure 30.

[0081] This application does not specifically limit the material of the radiator 10. Optionally, the radiator 10 may be made of a conductive material, including but not limited to conductive materials such as metals and alloys. This application does not specifically limit the shape of the radiator 10. For example, the shape of the radiator 10 may include, but is not limited to, strip-shaped, sheet-shaped, rod-shaped, coated, or thin-film-shaped. Figure 3The radiator 10 shown is merely an example and does not limit the shape of the radiator 10 provided in this application. In this embodiment, the radiator 10 is strip-shaped. This application does not limit the extension trajectory of the radiator 10. Optionally, the radiator 10 can extend along a straight line, a curve, or a bend. The radiator 10 described above can be a line of uniform width on its extension trajectory, or it can be a strip of varying width, such as one with a gradually changing width or a widened region.

[0082] This application does not specifically limit the form of the radiator 10. Optionally, the form of the radiator 10 includes, but is not limited to, a metal frame 320, a metal frame embedded in a plastic frame 320, a metal radiator 10 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-directly formed antenna (LDS), a printed-directly formed antenna (PDS), a conductive sheet antenna (e.g., a metal bracket antenna), etc. In this embodiment, the radiator 10 is taken as part of the metal frame 320 of the electronic device 1000. This application is not limited to the specific location of the radiator 10 on the frame 320.

[0083] Please see Figure 3 and Figure 4 The radiator 10 is disposed on the first side 322. The radiator 10 is spaced apart along the second floor edge 512.

[0084] The head-and-hand satellite communication mode is a communication mode in which the operator holds the electronic device 1000 near their head. In this mode, because the antenna 321 on the top edge is close to the head, it is easily affected by the head medium loading, resulting in detuning (frequency offset), severe efficiency reduction, or inability to transmit or receive satellite signals. The radiator 10 located on the first side 322 provided in this application embodiment is relatively far from the head, for example, the distance from the center of the head is greater than 5cm. The head medium loading has little or no impact on the radiator 10 on the first side 322, so that the antenna assembly 100 provided in this application embodiment can also work normally in the head-and-hand satellite communication mode.

[0085] Furthermore, the top-edge 321 antenna, being close to the human head in head-and-hand satellite communication mode, poses a risk of super SAR (super SAR). In contrast, the radiator 10 provided in this embodiment is located relatively far from the human head, thus reducing the risk of super SAR.

[0086] Please see Figure 3 and Figure 4 The radiator 10 includes a first grounding terminal A1, a feed point B, and a first free terminal D1 arranged sequentially. The first grounding terminal A1 is electrically connected to the reference floor 500.

[0087] The free end mentioned in this application refers to the end that is disconnected from other conductive parts on the frame 320 by an insulating gap and is not electrically connected to the reference floor 500. To ensure the structural strength of the frame 320 of the electronic device 1000, the aforementioned insulating gap is filled with insulating material.

[0088] The first grounding terminal A1 is electrically connected to the reference floor 500. The first grounding terminal A1 described in this application refers to the location where the reference floor 500 is electrically connected. The electrical connection method includes, but is not limited to, direct or indirect electrical connection. For example, the first grounding terminal A1 returns to ground via a grounding spring. As another example, the first grounding terminal A1 of the radiator 10 is interconnected with a portion of the reference floor 500, i.e., through a physical grounding method.

[0089] The direction from the first grounding terminal A1 to the first free terminal D1 is the same as or does not intersect with the direction from the second grounding terminal A2 to the second free terminal D2.

[0090] For example, when the resonant structure 30 is located on the side where the first side 322 is located or on the side where the second side 324 is located, the direction in which the first grounding terminal A1 points to the first free terminal D1 is the same as the direction in which the second grounding terminal A2 points to the second free terminal D2. For example, the direction in which the first grounding terminal A1 points to the first free terminal D1 and the direction in which the second grounding terminal A2 points to the second free terminal D2 both point towards the top edge 321; or, the direction in which the first grounding terminal A1 points to the first free terminal D1 and the direction in which the second grounding terminal A2 points to the second free terminal D2 both point towards the bottom edge 323.

[0091] For example, when the resonant structure 30 is located on the side where the top edge 321 is located, the direction from the first grounding terminal A1 to the first free end D1 does not intersect with the direction from the second grounding terminal A2 to the second free end D2. Further, the first side edge 322 is the right side of the back view of the frame 320. In this case, the direction from the first grounding terminal A1 to the first free end D1 is upward along the first side edge 322. The direction from the second grounding terminal A2 to the second free end D2 is to the left along the top edge 321. The resonant structure 30 is located to the left of the line containing the radiator 10, and the free end of the resonant structure 30 faces to the left. In this case, the direction from the first grounding terminal A1 to the first free end D1 does not intersect with the direction from the second grounding terminal A2 to the second free end D2. In this embodiment, the second grounding terminal A2 is located closer to the first side edge 322 to enhance the coupling effect between the radiator 10 and the resonant structure 30.

[0092] It should be noted that both the radiator 10 and the resonant structure 30 are located on the first side 322, and the direction of the first grounding terminal A1 pointing to the first free terminal D1 is upward, while the direction of the second grounding terminal A2 pointing to the second free terminal D2 is downward. This situation is not considered to be the case where the direction of the first grounding terminal A1 pointing to the first free terminal D1 and the direction of the second grounding terminal A2 pointing to the second free terminal D2 do not intersect.

[0093] The first signal source 20 is electrically connected to the feed point B. The first signal source 20 is used to provide excitation signals for the satellite communication frequency band.

[0094] Please see Figure 3 and Figure 4 The first signal source 20 is electrically connected to the feed point B. The first signal source 20 includes, but is not limited to, an RF transceiver chip. In this embodiment, the first signal source 20 is mounted on the motherboard 600. The electrical connection between the first signal source 20 and the feed point B includes, but is not limited to, indirect connections via coaxial cables, conductive springs, etc. Specifically, the first signal source 20 is electrically connected to the feed point B via a feed spring (conductive spring) mounted on the motherboard 600.

[0095] Please see Figure 3 and Figure 4The antenna assembly 100 further includes a matching circuit M1. The matching circuit M1 is electrically connected between the first signal source 20 and the feed point B. The matching circuit M1 and the first signal source 20 can be connected via a coaxial line, and the matching circuit M1 and the feed point B are electrically connected via a feed spring (conductive spring). The matching circuit M1 includes at least one of a capacitor and an inductor. By adjusting the impedance matching between the first signal source 20 and the radiator 10, the matching circuit M1 facilitates the excitation of a resonant mode on the radiator 10.

[0096] Further, please refer to Figure 5 The matching circuit M1 may also include a matching switch M11 and multiple matching branches M12 electrically connected to the matching switch. The matching switch M11 switches different matching branches M12 to achieve the switching of the frequency band (first frequency band) supported by the radiator 10 or to achieve impedance matching when switching different signals (Tiantong satellite frequency band or mobile communication frequency band) supported by the radiator 10.

[0097] The resonant structure 30 is located on at least one of the sides of the top edge 321, the first side edge 322, and the second side edge 324.

[0098] For example, when there is only one resonant structure 30, the resonant structure 30 can be located on the side where the top edge 321 is located, or on the side where the first side edge 322 is located, or on the side where the second side edge 324 is located.

[0099] For example, when there are two resonant structures 30, the resonant structures 30 can be located on any two sides of the side where the top edge 321 is located, the side where the first side edge 322 is located, and the side where the second side edge 324 is located.

[0100] For example, when there are three resonant structures 30, the resonant structures 30 can be located on three of the following sides: the top side 321, the first side 322, and the second side 324.

[0101] Optionally, the resonant structure 30 may be part of the frame or part of the reference floor 500.

[0102] Please see Figure 3 and Figure 4 The resonant structure 30 includes a second ground terminal A2 and a second free terminal D2. The second ground terminal A2 is electrically connected to the reference ground plane 500.

[0103] The first signal source 20 is used to excite the radiator 10 to form a first resonant mode supporting a first frequency band, and to excite the reference ground 500 to form a ground current. The resonant structure 30 forms a second resonant mode supporting a second frequency band at least under the excitation of the ground current. The center frequency of the first frequency band is greater than or equal to the center frequency of the second frequency band.

[0104] The first signal source 20 is used to excite the radiator 10 to form a first resonant mode supporting the first frequency band, and to excite the reference ground 500 to form a ground current.

[0105] The resonant structure 30, at least under the excitation of the ground current, forms a second resonant mode supporting the second frequency band. The center frequency of the first frequency band is greater than or equal to the center frequency of the second frequency band.

[0106] Specifically, the first signal source 20 provides an excitation signal in the satellite communication frequency band to excite a first resonant current to be generated on the radiator 10 and a ground current to be formed on the reference ground 500. Simultaneously, under resonant conditions, the electrical length of the resonant structure 30 guides the ground current to concentrate within the resonant structure 30, forming a second resonant mode supporting the second frequency band. Optionally, the first frequency band covers the satellite communication frequency band, and the first resonant mode is the main radiating mode, enabling the antenna assembly 100 to support the satellite communication frequency band, facilitating satellite communication for electronic devices.

[0107] The second resonant mode on the resonant structure 30 is an auxiliary radiation mode. The resonant structure 30 tunes the radiation pattern of the antenna assembly 100 by changing the current distribution of the reference ground 500. On the other hand, the resonant point of the second resonant mode formed by the resonant structure 30 is equal to the resonant point of the first resonant mode, so as to form a wide bandwidth with the first resonant mode and enhance the energy radiation of the antenna assembly 100 in the satellite frequency band. Furthermore, the resonant point of the second resonant mode formed by the resonant structure 30 is smaller than the resonant point of the first resonant mode, which can improve the resonant efficiency of the first resonant mode.

[0108] Optionally, the resonant point of the second resonant mode (the center frequency of the second frequency band) is slightly smaller than the resonant point of the first resonant mode (the center frequency of the first frequency band). This application does not specifically limit the resonant point of the second resonant mode. The reference is that the energy percentage of the upper hemisphere of the antenna assembly 100 formed by the resonant structure 30 is greater than or equal to a preset upper hemisphere energy percentage. The preset upper hemisphere energy percentage is the energy percentage of the upper hemisphere when the resonant structure 30 is not set, for example, 40%. For example, if the resonant point of the first resonant mode is 2.0 GHz and the resonant point of the second resonant mode is 1.9 GHz, the energy percentage of the upper hemisphere when the antenna assembly 100 is working is 70%, and the resonant point of the second resonant mode is considered to include 1.9 GHz. As another example, if the resonant point of the first resonant mode is 2.0 GHz and the resonant point of the second resonant mode is 1.2 GHz, the energy percentage of the upper hemisphere when the antenna assembly 100 is working is 39%, and 1.2 GHz is considered unsuitable as the resonant point of the second resonant mode.

[0109] The electronic device 1000 provided in this application embodiment features a radiator 10 disposed on the first side 322 of a frame. The radiator 10 includes a first ground terminal A1, a feed point B, and a first free terminal D1 arranged sequentially. The first ground terminal A1 is electrically connected to a reference ground plane 500. A first signal source 20 is electrically connected to the feed point B and is used to provide excitation signals for satellite communication frequency bands. A resonant structure 30 is disposed on at least one of the sides of the top edge 321, the first side 322, and the second side 324. The resonant structure 30 includes a second ground terminal A2 and a second free terminal D2. The second ground terminal A2 is electrically connected to the reference ground plane 500. The first ground terminal A1... The direction pointing to the first free end D1 is the same as or does not intersect with the direction pointing to the second free end D2 from the second ground end A2. The first signal source 20 is used to excite the radiator 10 to form a first resonant mode supporting the first frequency band and to excite the reference ground 500 to form a ground current. The resonant structure 30 forms a second resonant mode supporting the second frequency band at least under the excitation of the ground current. The center frequency of the first frequency band is greater than or equal to the center frequency of the second frequency band. The radiator 10 and the resonant structure 30 are resonant through the above design. The resonant structure 30 is used to change the current distribution on the reference ground 500, thereby tuning the radiation pattern of the antenna assembly 100 and achieving good satellite communication.

[0110] The following embodiments of this application take the example where both the first frequency band supported by the first resonant mode and the second frequency band supported by the second resonant mode cover satellite communication frequency bands.

[0111] Optionally, in this embodiment of the application, a resonant structure 30 is provided on the side where the first side 322 is located, or on the side where the top side 321 is located, or on the side where the second side 324 is located. The resonant structure 30 can guide the current on the reference ground 500 to be more concentrated near the resonant structure 30. By changing the current distribution on the reference ground 500, the radiation pattern of the antenna assembly 100 is tuned, the energy ratio of the upper hemisphere is increased, and thus good satellite communication of electronic equipment is achieved.

[0112] Optionally, when there is one resonant structure 30, one resonant structure 30 and radiator 10 can form an antenna pair. When there are multiple resonant structures 30, multiple resonant structures 30 and radiator 10 can form an antenna cluster.

[0113] Furthermore, the main radiation pattern formed by the antenna assembly 100 in the first resonant mode and the second resonant mode points towards the side where the top edge 321 is located. Generally, the electronic device 1000 is used with the top edge 321 pointing towards the air. By pointing the main radiation pattern of the antenna assembly 100 towards the side where the top edge 321 is located, it is possible for the electronic device 1000 to establish direct communication with satellite equipment.

[0114] Optionally, the resonant structure 30 is located on the side where the top edge 321 is located. The resonant structure 30 is used to guide the current on the reference ground plane 500 to the region near the top edge 321. In this way, the longitudinal current intensity of the upper half of the reference ground plane 500 is enhanced, and the contribution of the longitudinal ground plane current of the upper half of the reference ground plane 500 to the radiation of the antenna assembly 100 is enhanced. The radiation pattern of the antenna assembly 100 is oriented towards the side where the top edge 321 is located, thereby improving the upper hemisphere energy ratio of the antenna assembly 100 in the satellite communication frequency band. The longitudinal direction is parallel to the edge of the second ground plane.

[0115] Optionally, the resonant structure 30 is located on the side where the first side 322 is located. The resonant structure 30 and the radiator 10 form an antenna pair. The phase relationship between the resonant structure 30 and the radiator 10 is designed so that the radiation pattern of the antenna assembly 100 is oriented towards the side where the top edge 321 is located, thereby increasing the energy ratio of the antenna assembly 100 in the upper hemisphere of the satellite communication frequency band.

[0116] Optionally, the resonant structure 30 is located on the side where the second side 324 is located. The resonant structure 30 is used to guide the current on the reference ground 500 to the region near the second side 324. In this way, the lateral current intensity of the reference ground 500 is enhanced, so that the radiation pattern of the antenna assembly 100 is oriented towards the side where the top edge 321 is located, thereby improving the upper hemisphere energy ratio of the antenna assembly 100 in the satellite communication frequency band. The lateral direction is parallel to the first ground edge 511.

[0117] The following example, with reference to the accompanying drawings, illustrates how the resonant structure 30 of this application is configured to increase the energy ratio of the upper hemisphere of the antenna assembly 100.

[0118] Optional, please refer to Figure 4 The at least one resonant structure 30 includes a first resonant structure 31. The first resonant structure 31 is located on the side where the first side 322 is located. The direction in which the second ground terminal A2 of the first resonant structure 31 points to the second free terminal D2 is the same as the direction in which the second ground terminal A2 of the radiator 10 points to the first free terminal D1.

[0119] In other words, the first resonant structure 31 and the radiator 10 are located on the same side of the reference floor 500, for example, both are located on the first side edge 322. Furthermore, the free end of the first resonant structure 31 is oriented in the same direction as the free end of the radiator 10.

[0120] For details, please refer to Figure 4 The free end of the first resonant structure 31 and the free end of the radiator 10 both face the side where the top edge 321 is located.

[0121] Please see Figure 6 The free end of the first resonant structure 31 and the free end of the radiator 10 both face the side where the bottom edge 323 is located. If the free end of the first resonant structure 31 faces the opposite direction to the free end of the radiator 10, common mode and differential mode are generated, and a better radiation pattern towards the top edge 321 cannot be formed. By designing the free end of the first resonant structure 31 to face the same direction as the free end of the radiator 10, a better radiation pattern towards the top edge 321 can be formed.

[0122] The first resonant mode is a quarter-wavelength mode that resonates between the first ground terminal A1 and the first free terminal D1 and supports the first frequency band. In other words, the main resonant current of the first resonant mode is distributed between the first ground terminal A1 and the first free terminal D1, that is, across the entire branch of the radiator 10. The electrical length of the radiator 10 is close to or equal to one-quarter of the wavelength of the center frequency of the first frequency band, thereby exciting the formation of a quarter-wavelength mode supporting the first frequency band between the first ground terminal A1 and the first free terminal D1.

[0123] The current distribution of the main resonant current in the first resonant mode includes: flowing from the first ground terminal A1 to the first free terminal D1. Due to the periodicity of the current, at other times, the current flow direction can also be from the first free terminal D1 to the first ground terminal A1.

[0124] The electrical length described in this application can satisfy the following formula:

[0125]

[0126] Where L is the physical length, a is the transmission time of the electrical or electromagnetic signal in the medium, and b is the transmission time in the free scene.

[0127] The radiator 10 described above uses an IFA antenna. The first resonant mode is close to or is a quarter-wavelength mode of the first frequency band. The quarter-wavelength mode is the ground state mode of the IFA antenna and has relatively high efficiency, ensuring that the first frequency band supported by the first resonant mode has relatively high efficiency.

[0128] The second resonant mode is a 1 / 4 wavelength mode that resonates between the second ground terminal A2 and the second free terminal D2 and supports the second frequency band. In other words, the main resonant current of the second resonant mode is distributed between the second ground terminal A2 and the second free terminal D2, that is, across the entire branch of the resonant structure 30. The electrical length of the resonant structure 30 is close to or equal to 1 / 4 wavelength of the center frequency of the second frequency band, so as to excite the formation of a 1 / 4 wavelength mode supporting the second frequency band between the second ground terminal A2 and the second free terminal D2.

[0129] The main resonant current distribution in the second resonant mode includes a flow from the second ground terminal A2 to the second free terminal D2. Due to the periodicity of the current, at other times, the current flow direction can also be from the second free terminal D2 to the second ground terminal A2.

[0130] Optionally, both the first and second frequency bands cover the Tiantong satellite communication frequency band (1980-2200MHz), or the continuous frequency band formed by the first and second frequency bands covers the Tiantong satellite communication frequency band (1980-2200MHz).

[0131] Please see Figure 4 and Figure 6 The first resonant structure 31 and the radiator 10 form an antenna pair.

[0132] Further, please refer to Figure 4 and Figure 6 The first resonant structure 31 is located on the side of the radiator 10 away from the top edge 321. By designing the radiator 10 to be located between the first resonant structure 31 and the top edge 321, the phase of the first resonant current of the radiator 10 in the first resonant mode lags behind the phase of the second resonant current of the first resonant structure 31 in the second resonant mode. The radiation direction is from the phase-leading direction to the phase-lagging direction. Thus, the radiation direction of the antenna assembly 100 is from the first resonant structure 31 to the radiator 10, that is, the radiation direction of the antenna assembly 100 is towards the top edge 321.

[0133] Optionally, the first resonant structure 31 and the radiator 10 are located on the same side, and the first resonant structure 31 and the radiator 10 are coupled through the ground current on the reference ground 500. That is, the first signal source 20 excites the radiator 10 to form a first resonant current and the reference ground 500 to form a ground current, and also forms a resonance condition at the electrical length of the first resonant structure 31, attracting more ground current, and forming a second resonant current on the first resonant structure 31. In addition, the first grounding end A1 is a strong magnetic field position, the second free end D2 is a strong electric field position, and a coupling gap is formed between the first grounding end A1 and the second free end D2. Alternatively, the first free end D1 is a strong electric field position, the second grounding end A2 is a strong magnetic field position, and a coupling gap is formed between the second grounding end A2 and the first free end D1. The radiator 10 and the first resonant structure 31 constitute a magnetic field-electric field coupling structure, that is, the radiator 10 and the first resonant structure 31 are also spatially coupled.

[0134] The coupling effect between the radiator 10 and the first resonant structure 31 affects the phase difference of the current on the radiator 10 and the first resonant structure 31. Therefore, the phase difference of the current on the first resonant structure 31 and the radiator 10 can be tuned by designing the coupling strength between the radiator 10 and the first resonant structure 31. In addition, the phase difference of the current on the first resonant structure 31 and the radiator 10 can be tuned by tuning the center point size of the first frequency band and the center point size of the second frequency band.

[0135] Optional, please refer to Figure 7 The radiator 10 includes a first connection point E1. The first connection point E1 is located between the second grounding terminal A2 and the second free terminal D2, or the first connection point E1 is located at the second grounding terminal A2.

[0136] Optional, please refer to Figure 7 The antenna assembly 100 includes a tuning circuit T1. One end of the tuning circuit T1 is electrically connected to the first connection point E1, and the other end of the tuning circuit T1 is grounded. The tuning circuit T1 is used to tune the resonant frequency of the resonant structure 30, that is, to tune the center frequency of the second frequency band.

[0137] The tuning circuit T1 includes, but is not limited to, components such as inductors and capacitors.

[0138] Further, please refer to Figure 8 The tuning circuit T1 further includes a tuning switch T11 and multiple tuning branches T12. One end of the tuning switch T11 is electrically connected to the first connection point E1, one end of each of the multiple tuning branches T12 is electrically connected to the other end of the tuning switch T11, and the other end of each of the multiple tuning branches T12 is grounded.

[0139] Each of the tuning branches T12 has a different impedance value. For example, the multiple tuning branches T12 may be multiple capacitors with different capacitance values; or, the multiple tuning branches T12 may be multiple inductors with different inductance values; or, the multiple tuning branches T12 may include multiple capacitors with different capacitance values ​​and multiple inductors with different inductance values. By adjusting the tuning switch T11 electrically connected to different devices, the equivalent electrical length electrically connected to the radiator 10 and the tuning branch T12 is adjusted, thereby switching the resonant point size of the second resonant mode.

[0140] Optionally, the tuning branch T12 includes an adjustable capacitor.

[0141] When the tuning circuit T1 is provided, the equivalent electrical length formed by the stub between the second ground terminal A2 and the second free terminal D2 of the first resonant structure 31 and the tuning circuit T1 is close to 1 / 4 wavelength of the resonant point of the second resonant mode.

[0142] In other embodiments, the resonant structure 30 may also not include the tuning circuit T1, and the electrical length between the second ground terminal A2 and the second free terminal D2 of the resonant structure 30 has met the conditions for resonance to occur on the resonant structure 30 (for example, the electrical length is close to 1 / 4 wavelength of the second frequency band).

[0143] This application does not impose specific limitations on the structure of the matching circuit M1.

[0144] For example, please see Figure 9 The matching circuit M1 includes a first inductor L1 and a first capacitor C1. The first inductor L1 is electrically connected between the feed point B and the first signal source 20. One end of the first capacitor C1 is electrically connected between the first inductor L1 and the first signal source 20, and the other end of the first capacitor C1 is grounded. This application does not specify the inductance value of the first inductor L1 or the capacitance value of the first capacitor C1.

[0145] This application does not impose specific limitations on the structure of the tuning circuit T1.

[0146] For example, please see Figure 9 The tuning circuit T1 includes a second capacitor element C2 and a second inductor element L2. One end of the second capacitor element C2 is electrically connected to a first connection point E1 between the second ground terminal A2 and the second free terminal D2, and the other end of the second capacitor element C2 is grounded. One end of the second inductor element L2 is electrically connected to one end of the second capacitor element C2, and the other end of the second inductor element L2 is grounded. This application does not specifically limit the inductance value of the second inductor element L2 or the capacitance value of the second capacitor element C2.

[0147] In the antenna assembly 100 without the resonant structure 30, the radiator 10 is located on the first side 322, and the second free end D2 of the radiator 10 points to the side where the top edge 321 is located. The resonant point of the radiator 10 under the excitation of the first signal source 20 is 2 GHz.

[0148] Please see Figure 10 , Figure 10 This is the total field pattern of the radiator 10 in the antenna assembly 100 without the resonant structure 30 provided in this embodiment of the application. As shown in the figure, the total field pattern of the radiator 10 of the antenna assembly 100 points to the side where the top edge 321 is located and the side where the bottom edge 323 is located. This is because the phase distribution of the resonant current on the radiator 10 is such that the current phase of the first ground terminal A1 leads and the current phase of the first free terminal D1 lags, thus forming a radiation direction pointing to the top edge 321. In addition, since the ground current on the reference ground 500 is transmitted longitudinally towards the side where the bottom edge 323 is located, a radiation direction pointing to the bottom edge 323 is formed.

[0149] Please see Figure 11 , Figure 11 This is a 2D radiation pattern of the radiator 10 in the antenna assembly 100 without the resonant structure 30 provided in this embodiment of the application. Theta is taken as 0-90° representing the energy distribution in the upper hemisphere. As shown in the figure, the energy distribution of the antenna assembly 100 in the upper hemisphere is smaller than that in the lower hemisphere.

[0150] The radiator 10 of the antenna assembly 100 accounts for 40% of the energy in the upper hemisphere of the Tiantong satellite frequency band. This indicates that in the antenna assembly 100 without the resonant structure 30, the radiator 10 is located on the first side 322, and the electronic device 1000 occupies a relatively low position in the upper hemisphere of the radiation pattern in the satellite head-to-hand communication scenario.

[0151] Please see Figure 12 , Figure 12 This is the left-hand circular polarization pattern of the radiator 10 in the antenna assembly 100 without the resonant structure 30 provided in this embodiment of the application. The left-hand circular polarization pattern also points towards the bottom edge 323.

[0152] The following description uses the example of the first resonant structure 31 and the radiator 10 both being located on one side of the reference ground 500, with the center frequency of the first frequency band and the center frequency of the second frequency band both being 2GHz, to explain the performance of the antenna assembly 100, including its total field pattern and circular polarization pattern.

[0153] Please see Figure 4 and Figure 13 , Figure 13The embodiment of this application shows that both the first resonant structure 31 and the radiator 10 are located on the first side 322, and the second free end D2 of the first resonant structure 31 and the first free end D1 of the radiator 10 both face the top edge 321. As shown in the figure, the total field pattern of the radiator 10 of the antenna assembly 100 points to the side where the top edge 321 is located. Compared with the embodiment where the radiator 10 of the antenna assembly 100 is located on the first side 322 without the resonant structure 30, the radiated energy of the antenna assembly 100 towards the bottom edge 323 is greatly reduced, and the main radiation direction of the antenna assembly 100 is towards the top edge 321, so that when the electronic device 1000 is working in the satellite communication frequency band, the antenna assembly 100 can establish a signal connection with the satellite equipment at the top.

[0154] Please see Figure 14 , Figure 14 This embodiment of the application shows that both the first resonant structure 31 and the radiator 10 are located on the first side 322, and the second free end D2 of the first resonant structure 31 and the first free end D1 of the radiator 10 both face the top edge 321. As can be seen from the total field pattern, the main radiation direction of the antenna assembly 100 faces the top edge 321, exhibiting a relatively small directivity coefficient and a relatively large coverage angle range (e.g., the angle corresponding to the dashed line in the figure). This facilitates rapid connection of the electronic device 1000 during satellite communication and allows the electronic device 1000 to move with the operator during satellite communication, maintaining connection with the satellite even when the electronic device 1000 is moving or changing its orientation.

[0155] Please see Figure 15 , Figure 15 This embodiment of the application shows a left-hand circular polarization pattern where the first resonant structure 31 and the radiator 10 are both located on the first side 322, and the second free end D2 of the first resonant structure 31 and the first free end D1 of the radiator 10 both face the top side 321. The total directional gain is 2 dBi, and the left-hand circular polarization gain is 1.568 dBi. This indicates that left-hand circular polarization is the dominant polarization. In Tiantong satellite communication, left-hand circular polarization wave transmission is primarily used. As shown in the figure, the most dominant direction of the left-hand circular polarization pattern is upward, and the angular coverage range in the upward direction (e.g., the angle corresponding to the dashed line in the figure) is relatively large.

[0156] Please see Figure 16 , Figure 16This is a 2D radiation pattern of left-hand circular polarization provided in this embodiment, where the first resonant structure 31 and the radiator 10 are both located on the first side 322, and the second free end D2 of the first resonant structure 31 and the first free end D1 of the radiator 10 both face the top edge 321. Since the total field gain of the antenna assembly 100 radiating towards the top edge 321 increases after the first resonant structure 31 is set, the circular polarization field gain of the antenna assembly 100 radiating towards the top edge 321 also increases. Here, Theta is taken as 0-90° representing the energy distribution in the upper hemisphere. As shown in the figure, the total field energy distribution of the antenna assembly 100 in the upper hemisphere is much greater than that in the lower hemisphere. Since the Tiantong satellite communication band transmits through left-hand circular polarization waves, the proportion of left-hand circular polarization field energy in the upper hemisphere increases in this embodiment, thus improving the efficiency of the Tiantong satellite communication band.

[0157] As can be seen from the figure, the antenna assembly 100 has a large coverage angle range for the energy radiation of the left-hand circularly polarized wave in the upper hemisphere, which facilitates the rapid connection of the electronic device 1000 during Tiantong satellite communication and enables the electronic device 1000 to move with the operator during Tiantong satellite communication, for example, the electronic device 1000 can maintain its connection with Tiantong satellite while moving or changing its azimuth.

[0158] Compared to the embodiment where the radiator 10 of the antenna assembly 100 is located on the first side 322 without the resonant structure 30, the radiated energy of the antenna assembly 100 towards the bottom edge 323 is greatly reduced. The main radiation direction of the antenna assembly 100 is towards the top edge 321, so that when the electronic device 1000 is operating in the satellite communication frequency band, the antenna assembly 100 can establish a signal connection with the satellite equipment at the top. The energy ratio of the antenna assembly 100 in the upper hemisphere is 75%. Compared to the radiator 10 without the resonant structure 30 having an upper hemisphere energy ratio of 40%, the embodiment of this application provides the first resonant structure 31, which greatly improves the upper hemisphere energy ratio.

[0159] Please see Figure 6 and Figure 17 , Figure 17The embodiment of this application shows that both the first resonant structure 31 and the radiator 10 are located on the first side 322, and the second free end D2 of the first resonant structure 31 and the first free end D1 of the radiator 10 both face the bottom edge 323. As shown in the figure, the total field pattern of the radiator 10 of the antenna assembly 100 points to the side where the top edge 321 is located. Compared with the embodiment where the radiator 10 of the antenna assembly 100 is located on the first side 322 without the resonant structure 30, the radiated energy of the antenna assembly 100 towards the bottom edge 323 is greatly reduced, and the main radiation direction of the antenna assembly 100 is towards the top edge 321, so that when the electronic device 1000 is working in the satellite communication frequency band, the antenna assembly 100 can establish a signal connection with the satellite equipment at the top.

[0160] Please see Figure 18 , Figure 18 This embodiment of the application shows a 2D radiation pattern where the first resonant structure 31 and the radiator 10 are both located on the first side 322, and the second free end D2 of the first resonant structure 31 and the first free end D1 of the radiator 10 both face the bottom edge 323. Theta is defined as the energy distribution in the upper hemisphere (0-90°). As shown in the figure, the total field energy distribution of the antenna assembly 100 in the upper hemisphere is much greater than that in the lower hemisphere.

[0161] Compared to the embodiment where the radiator 10 of the antenna assembly 100 is located on the first side 322 without the resonant structure 30, the radiated energy of the antenna assembly 100 toward the bottom side 323 is greatly reduced. The main radiating direction of the antenna assembly 100 is toward the top side 321, so that when the electronic device 1000 is working in the satellite communication frequency band, the antenna assembly 100 can make signal connection with the satellite equipment at the top.

[0162] The above explains that the first free end D1 of the radiator 10 in the antenna assembly 100 and the second free end D2 of the first resonant structure 31, when facing the top edge 321 or the bottom edge 323, can form a radiation direction mainly towards the top edge 321, and have a high proportion of energy in the upper hemisphere.

[0163] The antenna assembly 100 provided in this application can also achieve wide-coverage circularly polarized signal transmission by designing the first resonant structure 31 and the radiator 10 to form an antenna pair.

[0164] Please refer to Table 1-1. Table 1-1 compares the efficiency, efficiency when a human is near, and SAR (Specific Absorption Rate) values ​​of the antenna assembly 100 provided in this application embodiment with and without the first resonant structure 31 forming an antenna pair with the radiator 10 in a free scene. Specifically, when the first resonant structure 31 is provided to form an antenna pair with the radiator 10, the efficiency in a free scene and the efficiency when a human is near both increase, and the SAR value when a human is near decreases, thereby reducing the risk of SAR exceeding the limit.

[0165] Table 1-1

[0166]

[0167] Optionally, the electronic device 1000 may be a non-foldable device or a foldable device.

[0168] When the electronic device 1000 is a foldable device, the reference floor 500 includes a first floor 520, a pivot 530 and a second floor 540 connected in sequence, and the at least one resonant structure 30 and the radiator 10 are both located on the same side of the pivot 530.

[0169] Please see Figure 19 , Figure 19 This is a schematic diagram of the structure provided in the embodiment of this application, in which the first resonant structure 31 and the radiator 10 are located on the same side of the rotating shaft 530.

[0170] Please see Figure 20 , Figure 20 This is the total field radiation pattern of the antenna assembly 100 in the foldable device provided in this application embodiment, without the resonant structure 30. As shown in the figure, when the electronic device 1000 is a foldable device, the width of the reference floor 500 increases. The total field radiation pattern of the radiator 10 of the antenna assembly 100 mainly points to the side where the bottom edge 323 is located. At this time, the energy proportion of the upper hemisphere of the antenna assembly 100 is 30%.

[0171] Please see Figure 21 , Figure 21 The total field radiation direction of the first resonant structure 31 and the radiator 10 in the foldable device provided in this application embodiment is located on the same side of the rotating shaft 530. Figure 1 As shown in the figure, when the electronic device 1000 is a folding device, the width of the reference floor 500 increases. Due to the presence of the first resonant structure 31, under its influence, the total field pattern of the radiator 10 of the antenna assembly 100 mainly points to the side where the top edge 321 is located. At this time, the energy proportion of the upper hemisphere of the antenna assembly 100 is 63%.

[0172] Please see Figure 22 , Figure 22The total field radiation direction of the first resonant structure 31 and the radiator 10 in the foldable device provided in this application embodiment is located on the same side of the rotating shaft 530. Figure 2 As shown in the figure, when the electronic device 1000 is a folding device, the width of the reference floor 500 increases. By tuning the tuning circuit T1 electrically connected to the first resonant structure 31, the second frequency point is tuned to a suitable position, and the coupling between the first resonant structure 31 and the radiator 10 is adjusted to a suitable degree, thereby improving the efficiency of the first frequency band and thus increasing the upward radiation gain. At this time, the energy proportion of the upper hemisphere of the antenna assembly 100 is 72%.

[0173] Please see Figure 23 , Figure 23 The total field radiation direction of the antenna assembly 100 in the foldable device provided in this application embodiment without the resonant structure 30 is... Figure 3 When the electronic device 1000 is held in hand, with the finger touching the first resonant structure 31, the upward radiation of the radiation pattern increases compared to the free scenario, although the main radiation direction is still towards the bottom edge 323. At this time, the energy proportion of the upper hemisphere is 45%.

[0174] Please see Figure 24 , Figure 24 This is the left-hand circularly polarized radiation pattern of the antenna assembly 100 in the foldable device provided in this application embodiment, without the resonant structure 30. When the electronic device 1000 is in a handheld state, with the fingers touching the first resonant structure 31, the upward radiation of the radiation pattern increases compared to the free scenario, and the upward radiation component of the left-hand circularly polarized pattern also increases.

[0175] Please see Figure 25 , Figure 25 The total field radiation direction of the first resonant structure 31 and the radiator 10 in the foldable device provided in this application embodiment is located on the same side of the rotating shaft 530. Figure 2 When the electronic device 1000 is in a handheld state, with the fingers touching the first resonant structure 31, compared to the embodiment without the first resonant structure 31, the upward radiated energy increases, the main radiation direction is towards the top edge 321, and the energy proportion of the upper hemisphere increases to 51.7%.

[0176] Please see Figure 26 , Figure 26This is a left-handed circularly polarized field radiation pattern of the first resonant structure 31 and the radiator 10 in the foldable device provided in this application embodiment, both located on the same side of the rotation shaft 530. When the electronic device 1000 is in a handheld state, with the fingers touching the first resonant structure 31, compared to the embodiment without the first resonant structure 31, the upward radiated energy increases, and the main radiation direction is towards the top edge 321. In addition, the proportion of left-handed circular polarization also increases. It can be seen that the radiation direction of the left-handed circularly polarized field is mainly towards the top edge 321.

[0177] Please see Figure 27 , Figure 27 This is the total field radiation pattern of the antenna assembly 100 near the head of the foldable device provided in this application embodiment, without the resonant structure 30. It can be seen that the total field radiation pattern of the radiator 10 of the antenna assembly 100 mainly points to the side where the bottom edge 323 is located.

[0178] Please see Figure 28 , Figure 28 This is the total field radiation pattern of the first resonant structure 31 and the radiator 10 in the foldable device provided in this application embodiment, which are located on the same side of the rotation shaft 530. Under the action of the first resonant structure 31 and the action of the head dielectric loading, the radiation pattern of the antenna assembly 100 is mainly oriented towards the top edge 321, and has a large angular coverage range in the upward radiation direction.

[0179] Please refer to Table 1-2. Table 1-2 compares the efficiency, efficiency when a human is near, and SAR value of the antenna assembly 100 provided in this application embodiment with and without the first resonant structure 31 forming an antenna pair with the radiator 10 in a free scene. Specifically, when the first resonant structure 31 is provided to form an antenna pair with the radiator 10, both the efficiency in a free scene and the efficiency when a human is near increase, while the SAR value when a human is near decreases, thereby reducing the risk of SAR exceeding the limit.

[0180] Table 1-2

[0181]

[0182] Please see Figure 29 , Figure 29 This is a schematic diagram of a structure with a resonant structure 30 on the top edge 321.

[0183] Optional, please refer to Figure 29 The at least one resonant structure 30 includes a second resonant structure 32. The second resonant structure 32 is disposed on the side where the top edge 321 is located. Specifically, the second resonant structure 32 may be disposed on the reference floor 500 on the side where the top edge 321 is located or on the top edge 321 itself. The structure and function of the second resonant structure 32 can be described with reference to the structure and function of the first resonant structure 31.

[0184] The second free end D2' of the second resonant structure 32 faces the side where the second side 324 is located. The first free end D1 of the radiator 10 faces the side where the top edge 321 is located. That is, the first free end D1 of the radiator 10 is relatively close to the second ground end A2' of the second resonant structure 32 to form a magnetic field-electric field coupling structure.

[0185] The second resonant structure 32 is used to guide the distribution of the floor current in the region near the first floor edge 511, thereby increasing the floor current intensity of the reference floor 500 in the region near the first floor edge 511, and thus enhancing the radiation pattern toward the top edge 321 and increasing the energy ratio of the upper hemisphere.

[0186] Optionally, the distance between the second resonant structure 32 and the first side 322 is greater than the distance between the second resonant structure 32 and the second side 324. In other words, the second resonant structure 32 is located on the top edge 321 near the radiator 10. Further, the second ground terminal A2 is located on the top edge 321 near the first side 322. Since the floor current on the side of the first floor edge 511 near the radiator 10 is relatively strong, the second resonant structure 32 is placed near the radiator 10, making it easier for the second resonant structure 32 to be excited by the floor current and form resonance. Moreover, the coupling between the second resonant structure 32 and the radiator 10 is stronger, guiding more floor current to the upper half of the reference floor 500, further enhancing the radiation pattern towards the top edge 321 and increasing the energy proportion of the upper hemisphere.

[0187] Under the excitation of the first signal source 20, a first resonant current is formed on the radiator 10, and a floor current is formed on the reference floor 500. The floor current includes a first sub-current and a second sub-current. The first sub-current is distributed between the first ground terminal A1 and the first floor edge 511. The second sub-current is distributed between the first ground terminal A1 and the fourth floor edge 514. The second resonant structure 32 guides more of the floor current on the reference floor 500 to the vicinity of the second resonant structure 32, so that the current intensity of the first sub-current is greater than that of the second sub-current, and the current intensity of the upper half of the reference floor 500 is greater than that of the lower half of the reference floor 500, thereby enhancing the radiation towards the top edge 321 and increasing the energy proportion of the upper hemisphere.

[0188] Please see Figure 30 , Figure 30This is the total field pattern of the second resonant structure 32 and the radiator 10 provided in this embodiment. As shown in the figure, the total field pattern of the radiator 10 of the antenna assembly 100 mainly points towards the side where the top edge 321 is located. Compared with the embodiment where the radiator 10 of the antenna assembly 100 is located on the first side 322 without the resonant structure 30, the radiated energy of the antenna assembly 100 towards the bottom edge 323 is greatly reduced, and the main radiation direction of the antenna assembly 100 is towards the top edge 321, so that when the electronic device 1000 is working in the satellite communication frequency band, the antenna assembly 100 can establish a signal connection with the satellite equipment at the top.

[0189] Please see Figure 31 , Figure 31 This is a left-hand circularly polarized 3D radiation pattern of the second resonant structure 32 and the radiator 10 provided in this application embodiment. As shown in the figure, the radiation pattern of the left-hand circularly polarized component of the radiator 10 of the antenna assembly 100 mainly points towards the side where the top edge 321 is located. Compared to the embodiment where the radiator 10 of the antenna assembly 100 is located on the first side 322 without the resonant structure 30, the left-hand circularly polarized radiation energy of the antenna assembly 100 towards the bottom edge 323 is greatly reduced, and the main radiation direction of the left-hand circularly polarized component of the antenna assembly 100 is towards the top edge 321. Left-hand circularly polarized waves are mainly used for transmission during Tiantong satellite communication to facilitate signal connection between the antenna assembly 100 and the Tiantong satellite equipment at the top when the electronic device 1000 is operating in the Tiantong satellite communication frequency band.

[0190] Please see Figure 32 , Figure 32 This is a 2D radiation pattern of the second resonant structure 32 and the radiator 10 with left-hand circular polarization provided in this embodiment. Since the total gain of the antenna assembly 100 radiating towards the top edge 321 increases after the second resonant structure 32 is set, the gain of the left-hand circularly polarized field radiated by the antenna assembly 100 towards the top edge 321 also increases. Here, Theta is taken as 0-90° representing the left-hand circularly polarized energy distribution in the upper hemisphere. As shown in the figure, the left-hand circularly polarized energy distribution of the antenna assembly 100 in the upper hemisphere is much larger than that in the lower hemisphere. Since the Tiantong satellite communication band transmits through left-hand circularly polarized waves, the proportion of left-hand circularly polarized field energy in the upper hemisphere increases in this embodiment, thus improving the efficiency of the Tiantong satellite communication band.

[0191] Please see Figure 33 , Figure 33This is a schematic diagram of the current distribution of the radiator 10 and the reference ground plane 500 in an antenna assembly 100 without the resonant structure 30 provided in this embodiment of the application. As shown in the figure, the current on the reference ground plane 500 includes a longitudinal current flowing towards the first ground plane edge 511, a longitudinal current flowing towards the fourth ground plane edge 514, and a transverse current flowing towards the second side edge 324. The longitudinal current flowing towards the first ground plane edge 511 and the longitudinal current flowing towards the fourth ground plane edge 514 are both relatively strong. This indicates that without the second resonant structure 32, the longitudinal current on the long side and the transverse current on the short side plate are excited, forming upward and downward antenna radiation.

[0192] Please see Figure 34 , Figure 34 This is a schematic diagram of the current distribution of the second resonant structure 32, radiator 10, and reference ground 500 provided in this embodiment. As shown in the figure, the current on the reference ground 500 includes longitudinal current flowing towards the first ground edge 511, longitudinal current flowing towards the fourth ground edge 514, and transverse current flowing towards the second side edge 324. The longitudinal current flowing towards the first ground edge 511 is significantly stronger than the longitudinal current flowing towards the fourth ground edge 514. Due to the presence of the second resonant structure 32 at the top, the longitudinal current in the upper half of the long side of the reference ground 500 is enhanced, while the longitudinal current in the lower half of the reference ground 500 is weakened, resulting in upward antenna radiation.

[0193] Please see Figure 35 , Figure 35 This is a diagram showing the upper hemisphere radiation ratio of the antenna assembly 100 without the resonant structure 30 provided in this embodiment of the application. As shown in the diagram, point 1 represents the upward radiated energy, and point 2 represents the total radiated energy. It can be seen that the upper hemisphere radiation ratio of the antenna assembly 100 without the resonant structure 30 is 40%.

[0194] Please see Figure 36 , Figure 36 This is a diagram showing the upper hemisphere radiation ratio of the antenna assembly 100, which forms an antenna pair with the radiator 10 and the second resonant structure 32 of the top edge 321 provided in this embodiment of the application. As shown in the figure, point 2 represents the upward radiated energy, and point 1 represents the total radiated energy. It can be seen that the upper hemisphere radiation ratio of the antenna assembly 100 without the resonant structure 30 is 57%.

[0195] The antenna assembly 100 provided in this application embodiment can improve the circular polarization directivity of the side antenna of the electronic device 1000 and the upper hemisphere radiation ratio. The main radiator 10 is located on the long side of the electronic device 1000, which reduces SAR backoff in head-and-hand communication mode compared to the top position, making it more suitable for head-and-hand communication mode. A resonant structure 30 is set at a specific position on the top of the electronic device 1000. Due to the guiding effect of the top resonant structure 30 on the main radiator 10, the longitudinal current of the upper half of the electronic device 1000 is enhanced, thereby improving the upper hemisphere radiation ratio and the gain of the circular polarization antenna of the electronic device 1000, and improving the user experience.

[0196] Please see Figure 37 , Figure 37 This is a schematic diagram of the antenna assembly 100 provided in this application embodiment, which simultaneously includes a first resonant structure 31 and a second resonant structure 32. The at least one resonant structure 30 includes a first resonant structure 31 and a second resonant structure 32. The first resonant structure 31 is located on the side where the first side 322 is located. The direction in which the second ground terminal A2 of the first resonant structure 31 points to the second free terminal D2 is the same as the direction in which the second ground terminal A2 of the radiator 10 points to the first free terminal D1. The second resonant structure 32 is located on the side where the top edge 321 is located. Specifically, the second resonant structure 32 may be located on the reference ground 500 on the side where the top edge 321 is located, or it may be located on the top edge 321 itself. A description of the structure and function of the second resonant structure 32 can be found in the description of the structure and function of the first resonant structure 31. The second free terminal D2' of the second resonant structure 32 faces the side where the second side 324 is located. The first free terminal D1 of the radiator 10 faces the side where the top edge 321 is located. That is, the first free end D1 of the radiator 10 is relatively close to the second ground end A2' of the second resonant structure 32 to form a magnetic field-electric field coupling structure.

[0197] The second resonant structure 32 is used to guide the distribution of the floor current in the region near the first floor edge 511, thereby increasing the floor current intensity of the reference floor 500 in the region near the first floor edge 511, and thus enhancing the radiation pattern toward the top edge 321 and increasing the energy ratio of the upper hemisphere.

[0198] Please see Figure 38 , Figure 38This is the total field pattern of the first resonant structure 31, the second resonant structure 32, and the radiator 10 provided in this embodiment. As shown in the figure, the total field pattern of the radiator 10 of the antenna assembly 100 mainly points towards the side where the top edge 321 is located. The downward sidelobes are further reduced. Compared with the embodiment where the radiator 10 of the antenna assembly 100 is located on the first side 322 without the resonant structure 30, the radiated energy of the antenna assembly 100 towards the bottom edge 323 is further reduced. The main radiation direction of the antenna assembly 100 is towards the top edge 321, so that when the electronic device 1000 is operating in the satellite communication frequency band, the antenna assembly 100 can establish a signal connection with the satellite equipment at the top.

[0199] Please see Figure 39 , Figure 39 This is a 3D radiation pattern of the left-hand circularly polarized radiation pattern of the first resonant structure 31, the second resonant structure 32, and the radiator 10 provided in this application embodiment. As shown in the figure, the radiation pattern of the left-hand circularly polarized component of the radiator 10 of the antenna assembly 100 mainly points towards the side where the top edge 321 is located, and the downward sidelobes in the left-hand circularly polarized field are further reduced. Compared to the embodiment where the radiator 10 of the antenna assembly 100 is located on the first side 322 without the resonant structure 30, the left-hand circularly polarized radiation energy of the antenna assembly 100 towards the bottom edge 323 is further reduced, and the main radiation direction of the left-hand circularly polarized component of the antenna assembly 100 is towards the top edge 321. Left-hand circularly polarized waves are mainly used for transmission during Tiantong satellite communication to facilitate signal connection between the antenna assembly 100 and the Tiantong satellite equipment at the top when the electronic device 1000 is operating in the Tiantong satellite communication frequency band.

[0200] Please see Figure 40 , Figure 40 This is a 2D radiation pattern of the left-hand circularly polarized antenna array 10, consisting of the first resonant structure 31, the second resonant structure 32, and the radiator 10, provided in this embodiment. Because the total gain of the antenna assembly 100 radiating towards the top edge 321 is further increased after the first and second resonant structures 31 and 32 are added, the gain of the left-hand circularly polarized field radiated by the antenna assembly 100 towards the top edge 321 is also further increased. Here, Theta is taken as 0-90° representing the left-hand circularly polarized energy distribution in the upper hemisphere. As shown in the figure, the left-hand circularly polarized energy distribution of the antenna assembly 100 in the upper hemisphere is much greater than that in the lower hemisphere. Since the Tiantong satellite communication band transmits through left-hand circularly polarized waves, the proportion of left-hand circularly polarized field energy in the upper hemisphere increases in this embodiment, thus improving the efficiency of the Tiantong satellite communication band.

[0201] Please see Figure 41 , Figure 41This is a schematic diagram of the current distribution of the first resonant structure 31, the second resonant structure 32, the radiator 10, and the reference ground 500 provided in this embodiment. As shown in the figure, the current on the reference ground 500 is mainly concentrated near the radiator 10, the first resonant structure 31, and the second resonant structure 32. The first resonant structure 31, the second resonant structure 32, and the radiator 10 all resonate. A leading-phase current is formed on the first resonant structure 31, and a lagging-phase current is formed on the radiator 10, forming a radiation direction pointing towards the top edge 321. The second resonant structure 32 increases the longitudinal current intensity in the upper half of the reference ground 500 and decreases the longitudinal current intensity in the lower half, reducing the longitudinal current flowing towards the bottom edge 323 and increasing upward radiation. Under the above dual enhancement effect, upward radiation towards the top edge 321 is formed, with a larger proportion of energy in the upper hemisphere.

[0202] Please see Figure 42 , Figure 42 This is a diagram showing the upper hemisphere radiation ratio of the antenna assembly 100, which forms an antenna cluster with the first resonant structure 31, the second resonant structure 32, and the radiator 10, according to an embodiment of this application. The first resonant structure 31 and the second resonant structure 32 are further enhanced by using the resonant structure 30 on the long side to further suppress the longitudinal current in the lower half. As shown in the diagram, point 2 represents the upward radiated energy, and point 1 represents the total radiated energy. It can be seen that the upper hemisphere radiation ratio of the antenna assembly 100 is further increased to 75.8%.

[0203] Please see Figure 43 , Figure 43 This is a schematic diagram of a structure with a resonant structure 30 on the second side 324.

[0204] Optional, please refer to Figure 43 The at least one resonant structure 30 includes a third resonant structure 33. The third resonant structure 33 is located on the side where the second side 324 is located. Specifically, the third resonant structure 33 can be located on the reference ground 500 on the side where the second side 324 is located, or on the second side 324 itself. The structure and function of the third resonant structure 33 can be referenced to the structure and function of the first resonant structure 31. Due to the arrangement of the third resonant structure 33, the third resonant structure 33 is used to increase the transverse current on the reference ground 500, thereby enhancing upward radiation. The direction of the transverse current is along the direction of the first ground edge 511. For example, if the transverse current on the reference ground 500 is close to half the wavelength of the first frequency band, and the reference ground 500 is approximately a dipole structure, an upward radiation pattern is formed according to the radiation pattern of the dipole structure.

[0205] Optional, please refer to Figure 44The direction in which the second grounding terminal A2 of the third resonant structure 33 points to the second free terminal D2 is the same as the direction in which the first grounding terminal A1 of the radiator 10 points to the first free terminal D1. That is, the orientation of the free terminal of the third resonant structure 33 is the same as the orientation of the free terminal of the first resonant structure 31, for example, both are facing the top edge 321. This application does not specifically limit the position of the third resonant structure 33. Optionally, the third resonant structure 33 may be disposed in the lower half of the reference floor 500 (near the bottom edge 323), or in the upper half of the reference floor 500 (near the top edge 321), or in a position directly opposite (or nearly directly opposite) to the radiator 10.

[0206] Optionally, the at least one resonant structure 30 includes a first resonant structure 31, a second resonant structure 32, and a third resonant structure 33. The first resonant structure 31 is located on the side where the first side edge 322 is located. The direction in which the second ground terminal A2 of the first resonant structure 31 points to the second free terminal D2 is the same as the direction in which the second ground terminal A2 of the radiator 10 points to the first free terminal D1. The second resonant structure 32 is located on the side where the top edge 321 is located. Specifically, the second resonant structure 32 can be located on the reference floor 500 on the side where the top edge 321 is located, or on the top edge 321 itself. The second free terminal D2' of the second resonant structure 32 faces the side where the second side edge 324 is located. The first free terminal D1 of the radiator 10 faces the side where the top edge 321 is located. The second resonant structure 32 is used to guide the floor current distribution in the area near the first floor edge 511, thereby increasing the floor current intensity of the reference floor 500 in the area near the first floor edge 511, thus enhancing the radiation pattern towards the top edge 321 and increasing the energy proportion of the upper hemisphere.

[0207] The third resonant structure 33 is located on the side where the second side 324 is located. Specifically, the third resonant structure 33 can be located on the reference ground 500 on the side where the second side 324 is located, or it can be located on the second side 324. Due to the arrangement of the third resonant structure 33, the third resonant structure 33 is used to increase the lateral current on the reference ground 500, thereby enhancing upward radiation. The direction of the lateral current is along the direction of the first ground edge 511. The direction of the second ground terminal A2 of the third resonant structure 33 pointing to the second free terminal D2 is the same as the direction of the first ground terminal A1 of the radiator 10 pointing to the first free terminal D1.

[0208] Please see Figure 45 When the electronic device 1000 is a foldable device, the reference floor 500 includes a first floor 520, a pivot 530 and a second floor 540 connected in sequence, and the at least one resonant structure 30 and the radiator 10 are both located on the same side of the pivot 530.

[0209] Optional, please refer to Figure 45 The first resonant structure 31, the second resonant structure 32, and the radiator 10 are all located on the same side of the rotating shaft 530.

[0210] Please see Figure 46 , Figure 46 This is the total field pattern of the first resonant structure 31, the second resonant structure 32, and the radiator 10 in the foldable device provided in this application embodiment, all located on the same side of the pivot 530. As shown in the figure, the total field pattern of the radiator 10 of the antenna assembly 100 mainly points towards the side where the top edge 321 is located. The downward sidelobes are further reduced. Compared with the embodiment where the radiator 10 of the antenna assembly 100 is located on the first side 322 without the resonant structure 30, the radiated energy of the antenna assembly 100 towards the bottom edge 323 is further reduced. The main radiation direction of the antenna assembly 100 is towards the top edge 321, so that when the electronic device 1000 is operating in the satellite communication frequency band, the antenna assembly 100 can establish a signal connection with the satellite equipment on the top.

[0211] Please see Figure 47 , Figure 47 This is a left-hand circularly polarized 3D radiation pattern of the first resonant structure 31, the second resonant structure 32, and the radiator 10 in the foldable device provided in this application embodiment, all located on the same side of the rotation shaft 530. As shown in the figure, the radiation pattern of the left-hand circularly polarized component of the radiator 10 of the antenna assembly 100 mainly points towards the top edge 321 and towards the first side edge 322, further reducing the downward sidelobes in the left-hand circularly polarized field. Compared to the embodiment where the radiator 10 of the antenna assembly 100 is located on the first side edge 322 without the resonant structure 30, the left-hand circularly polarized radiation energy of the antenna assembly 100 towards the bottom edge 323 is further reduced, and the main radiation direction of the left-hand circularly polarized component of the antenna assembly 100 is towards the top edge 321 and towards the first side edge 322. Left-hand circularly polarized wave transmission is mainly used for Tiantong satellite communication to facilitate signal connection between the antenna assembly 100 and the Tiantong satellite equipment on top when the electronic device 1000 operates in the Tiantong satellite communication frequency band.

[0212] Please see Figure 48 , Figure 48This is a left-handed circularly polarized 2D radiation pattern of the first resonant structure 31, the second resonant structure 32, and the radiator 10, all located on the same side of the rotation shaft 530 in the foldable device provided in this embodiment. Because the first resonant structure 31 and the second resonant structure 32 are provided, the total gain of the antenna assembly 100 radiating towards the top edge 321 is further increased, thus the gain of the left-handed circularly polarized field radiated by the antenna assembly 100 towards the top edge 321 is also further increased. Here, Theta is taken as 0-90° representing the left-handed circularly polarized energy distribution in the upper hemisphere. As shown in the figure, the left-handed circularly polarized energy distribution of the antenna assembly 100 in the upper hemisphere is much greater than that in the lower hemisphere. Since the Tiantong satellite communication band transmits through left-handed circularly polarized waves, the proportion of left-handed circularly polarized field energy in the upper hemisphere increases in this embodiment, thus improving the efficiency of the Tiantong satellite communication band.

[0213] Please see Figure 49 , Figure 49 This is a schematic diagram of the current distribution in the foldable device provided in this application, where the first resonant structure 31, the second resonant structure 32, and the radiator 10 are located on the same side of the rotating shaft 530. As shown in the diagram, the current on the reference floor 500 is mainly concentrated near the radiator 10, the first resonant structure 31, and the second resonant structure 32. The first resonant structure 31, the second resonant structure 32, and the radiator 10 all resonate. A leading-phase current is formed on the first resonant structure 31, and a lagging-phase current is formed on the radiator 10, creating a radiation direction pointing towards the top edge 321. The second resonant structure 32 increases the longitudinal current intensity in the upper half of the reference floor 500 and decreases the longitudinal current intensity in the lower half, reducing the longitudinal current flowing towards the bottom edge 323 and increasing upward radiation. Under this dual boosting effect, upward radiation towards the top edge 321 is formed, with a larger energy proportion in the upper hemisphere.

[0214] Please see Figure 50 , Figure 50 This is a diagram showing the upper hemisphere radiation ratio of the first resonant structure 31, the second resonant structure 32, and the radiator 10, all located on the same side of the rotation shaft 530 in the foldable device provided in this application embodiment. The first resonant structure 31 and the second resonant structure 32 are further enhanced by using the resonant structure 30 on the long side to further suppress the longitudinal current in the lower half. As shown in the diagram, point 2 represents the upward radiated energy, and point 1 represents the total radiated energy. It can be seen that the upper hemisphere radiation ratio of the antenna assembly 100 is further increased to 77.9%.

[0215] Optional, please refer to Figure 51The reference floor 500 includes a first floor 520, a pivot 530, and a second floor 540 connected in sequence. The second resonant structure 32, located on the side of the top edge 321, and the radiator 10 are located on the same side of the pivot 530. The third resonant structure 33, located on the side of the second side edge 324, and the radiator 10 are located on opposite sides of the pivot 530.

[0216] Furthermore, when the first floor 520 and the second floor 540 are folded, the resonant structure 30 located on the side where the second side 324 is located is on the side of the radiator 10 away from the top edge 321. The orientation of the second free end D2 of the resonant structure 30 located on the side where the second side 324 is located is the same as the orientation of the first free end D1 of the radiator 10. Thus, when the electronic device 1000 is folded, the third resonant structure 33 forms the first resonant structure 31 on the side of the radiator 10 away from the top edge 321. The electronic device 1000 can improve the upward radiation component of satellite communication and increase the proportion of the upper hemisphere in both the unfolded and folded states.

[0217] Optionally, the resonant structure 30 is part of the frame 320, or the resonant structure 30 is part of the reference floor 500. For example, the resonant structure 30 is formed by extending a branch from the edge of the reference floor 500, or by forming a hollow structure on the reference floor 500 to form the resonant structure 30.

[0218] This application does not limit the specific structure of the resonant structure 30. For example, the resonant structure 30 is L-shaped. In other embodiments, the resonant structure 30 may also be T-shaped, in which case the second resonant mode is the half-wavelength mode at the center frequency of the second frequency band.

[0219] For details, please refer to Figure 52 The resonant structure 30 further includes a third free end D3. The third free end D3 and the second free end D2 are the opposite ends of the resonant structure 30. The electrical length between the third free end D3 and the second free end D2 is close to half the wavelength of the center frequency of the second frequency band, so that the resonant structure 30 forms a half wavelength mode of the center frequency of the second frequency band under the excitation of the ground current.

[0220] Optionally, the distance between the first free end D1 of the radiator 10 and the top edge 321 is 20-60 mm. By setting the distance between the first free end D1 of the radiator 10 and the top edge 321 to 20-60 mm, the radiator 10 is kept as far away from the human head as possible when the electronic device 1000 is in a head-and-hand communication state, thereby reducing the impact of head loading on the efficiency of the antenna assembly 100 and reducing SAR risk. Furthermore, by setting the first free end D1 of the radiator 10 to be relatively far away from the bottom edge 323, the radiator 10 is located in the upper half of the first side edge 322, so as to avoid the first free end D1 near the bottom edge 323 being held by the hand when the electronic device 1000 is in a handheld state, thus preventing problems such as signal blockage.

[0221] The above is an example of radiator 10 operating in the satellite communication frequency band. Radiator 10 can also operate in the mobile communication frequency band.

[0222] Please see Figure 53 The antenna assembly 100 further includes at least one second signal source 40 and a first switching unit K1. The second signal source 40 is used to provide a mobile communication excitation signal. The mobile communication excitation signal includes, but is not limited to, LB band excitation signal, MHB band excitation signal, UHB band excitation signal, Wi-Fi band excitation signal, etc. In this application, the second signal source 40 provides an MHB band excitation signal. When the first and second frequency bands operate in the Tiantong satellite frequency band, the electrical length of the radiator 10 is close to the electrical length corresponding to the MHB band, and thus the radiator 10 is multiplexed as a Tiantong satellite antenna or an MHB antenna.

[0223] The first terminal of the first switching unit K1 is electrically connected to the first feed point B1, and further, is electrically connected to the first feed point B1 via a matching circuit M1. One selection terminal of the first switching unit K1 is electrically connected to the first signal source 20. The other selection terminal of the first switching unit K1 is electrically connected to at least one second signal source 40.

[0224] Further, please refer to Figure 54 The antenna assembly 100 further includes a third signal source 50 and a second switching unit K2. The third signal source 50 is used to provide a mobile communication excitation signal. The fixed terminal of the second switching unit K2 is electrically connected to the first connection point E1 of the first resonant structure 31, and the selected terminal of the second switching unit K2 can be selectively electrically connected to the third signal source 50. When the radiator 10 operates in the satellite communication frequency band, the second switching unit K2 is disconnected. When the radiator 10 operates in the mobile communication frequency band, the second switching unit K2 can be turned on or off.

[0225] Optional, please refer to Figure 55The antenna assembly 100 further includes a fourth signal source 60 and a third switching unit K3. The fourth signal source 60 is used to provide a mobile communication excitation signal. The fixed terminal of the third switching unit K3 is electrically connected to the third connection point E3 of the third resonant structure 33, and the selectable terminal of the third switching unit K3 can be selectively electrically connected to the fourth signal source 60. When the radiator 10 operates in the satellite communication frequency band, the third switching unit K3 is disconnected. When the radiator 10 operates in the mobile communication frequency band, the third switching unit K3 can be turned on or off.

[0226] Optional, please refer to Figure 56 The antenna assembly 100 further includes a fifth signal source 70 and a fourth switching unit K4. The fifth signal source 70 is used to provide satellite communication excitation signals. The fixed terminal of the fourth switching unit K4 is electrically connected to the second connection point E2 of the second resonant structure 32, and the selectable terminal of the fourth switching unit K4 can be selectively connected to the fifth signal source 70. Thus, the second resonant structure 32 can serve as an auxiliary resonant structure 30 when the radiator 10 operates in the satellite frequency band, and of course, it can also serve as a top satellite antenna. The top satellite antenna and the side satellite antenna can be switched according to the strength of the satellite signal.

[0227] The antenna assembly 100 provided in this application embodiment can increase the energy ratio of the upper hemisphere and improve the left-hand circular polarization gain of the upper hemisphere of the mobile phone. Since the main radiating antenna is located on the long side of the mobile phone, it reduces SAR backoff in head-and-hand call mode.

[0228] 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, include: The reference floor includes the first floor edge, the second floor edge, the third floor edge, and the fourth floor edge connected in sequence; A frame surrounds the periphery of the reference floor. The frame includes a top edge, a first side edge, a bottom edge, and a second side edge that are connected to each other. The top edge is opposite to and spaced apart from the first floor edge. The first side edge is opposite to and spaced apart from the second floor edge. The second side edge is opposite to and spaced apart from the third floor edge. The bottom edge is opposite to and spaced apart from the fourth floor edge. Antenna assembly, the antenna assembly comprising: A radiator is disposed on the first side, and the radiator includes a first grounding terminal, a feed point and a first free end arranged in sequence, wherein the first grounding terminal is electrically connected to the reference ground. A signal source, wherein the signal source is electrically connected to the feed point; and At least one resonant structure is provided on at least one of the top edge, the first side edge, and the second side edge. The resonant structure includes a second grounding terminal and a second free terminal. The second grounding terminal is electrically connected to the reference ground. The direction from the first grounding terminal to the first free terminal is the same as or does not intersect with the direction from the second grounding terminal to the second free terminal. The signal source is used to excite the radiator to form a first resonant mode supporting a first frequency band and to excite the reference ground to form a ground current. The resonant structure forms a second resonant mode supporting a second frequency band at least under the excitation of the ground current. The center frequency of the first frequency band is greater than or equal to the center frequency of the second frequency band.

2. The electronic device as claimed in claim 1, characterized in that, The main radiation pattern formed by the antenna assembly in the first resonant mode and the second resonant mode points to the side where the top edge is located.

3. The electronic device as claimed in claim 1, characterized in that, The at least one resonant structure includes a first resonant structure, which is located on the side where the first side is located. The direction of the second grounding terminal of the first resonant structure pointing to the second free end is the same as the direction of the second grounding terminal of the radiator pointing to the first free end.

4. The electronic device as claimed in claim 3, characterized in that, The first resonant structure is located on the side of the radiator away from the top edge.

5. The electronic device as claimed in claim 4, characterized in that, The phase of the first resonant current of the radiator in the first resonant mode lags behind the phase of the second resonant current of the first resonant structure in the second resonant mode.

6. The electronic device as claimed in claim 1, characterized in that, The antenna assembly includes a matching circuit electrically connected between the feed point and the signal source; and / or, The antenna assembly includes a tuning circuit, one end of which is electrically connected between the second ground terminal and the second free terminal, and the other end of which is grounded. The tuning circuit is used to tune the resonant frequency of the resonant structure.

7. The electronic device as claimed in claim 6, characterized in that, The matching circuit includes a first inductor and a first capacitor. The first inductor is electrically connected between the feed point and the signal source. One end of the first capacitor is electrically connected between the first inductor and the signal source, and the other end of the first capacitor is grounded.

8. The electronic device as claimed in claim 6, characterized in that, The tuning circuit includes a second capacitor element and a second inductor element. One end of the second capacitor element is electrically connected between the second ground terminal and the second free terminal, and the other end of the second capacitor element is grounded. One end of the second inductor element is electrically connected to one end of the second capacitor element, and the other end of the second inductor element is grounded.

9. The electronic device as claimed in claim 1 or 2, characterized in that, The at least one resonant structure includes a second resonant structure, which is located on the side where the top edge is located. The second free end of the second resonant structure faces the side where the second side edge is located. The first free end of the radiator faces the side where the top edge is located. The second resonant structure is used to guide the floor current distribution in the region near the first floor edge.

10. The electronic device as claimed in claim 9, characterized in that, The distance between the second resonant structure and the first side is greater than the distance between the second resonant structure and the second side.

11. The electronic device as claimed in claim 9, characterized in that, The floor current includes a first sub-current and a second sub-current. The first sub-current is distributed between the first grounding terminal and the first floor edge, and the second sub-current is distributed between the first grounding terminal and the fourth floor edge. The current intensity of the first sub-current is greater than that of the second sub-current.

12. The electronic device according to any one of claims 3-5, characterized in that, The at least one resonant structure further includes a second resonant structure, which is located on the side where the top edge is located. The second free end of the second resonant structure faces the side where the second side edge is located, and the first free end of the radiator faces the side where the top edge is located. The second resonant structure is used to guide the floor current distribution in the region near the first floor edge.

13. The electronic device as claimed in claim 1 or 2, characterized in that, The at least one resonant structure includes a third resonant structure, which is located on the side where the second side is located. The third resonant structure is used to increase the transverse current on the reference floor, and the direction of the transverse current is along the edge of the first floor.

14. The electronic device as claimed in claim 13, characterized in that, The direction in which the second grounding terminal of the third resonant structure points to the second free terminal is the same as the direction in which the first grounding terminal of the radiator points to the first free terminal.

15. The electronic device as claimed in claim 12, characterized in that, The at least one resonant structure further includes a third resonant structure, which is located on the side where the second side is located. The third resonant structure is used to increase the transverse current on the reference floor, and the direction of the transverse current is along the edge of the first floor.

16. The electronic device as described in any one of claims 1-8, 10-11, and 15, characterized in that, The reference floor includes a first floor, a rotating shaft, and a second floor connected in sequence, and the at least one resonant structure and the radiator are all located on the same side of the rotating shaft.

17. The electronic device as claimed in claim 15, characterized in that, The reference floor includes a first floor, a pivot, and a second floor connected in sequence. The resonant structure located on the top edge and the radiator are located on the same side of the pivot. The resonant structure located on the second side and the radiator are located on opposite sides of the pivot.

18. The electronic device as claimed in claim 17, characterized in that, When the first floor and the second floor are folded, the resonant structure located on the side where the second side is located is located on the side of the radiator away from the top edge, and the orientation of the second free end of the resonant structure located on the side where the second side is located is the same as the orientation of the first free end of the radiator.

19. The electronic device according to any one of claims 1-8, 10, 11, and 14-15, characterized in that, The resonant structure is part of the frame, or the resonant structure is part of the reference ground.

20. The electronic device according to any one of claims 1-8, 10, 11, and 14-15, characterized in that, The resonant structure further includes a third free end, which is opposite to the second free end.

21. The electronic device according to any one of claims 1-8, 10, 11, and 14-15, characterized in that, The distance between the first free end of the radiator and the top edge is 20-60 mm.

Images