Electronic device

Abstract

The invention discloses electronic equipment, and belongs to the technical field of antennas. The electronic equipment comprises a frame body; the first antenna comprises a first feed and a radiation branch, the first feed is electrically connected with the radiation branch, and the radiation branch is a frame on the frame body; the first parasitic radiation branch is arranged in a surrounding range of the first antenna; wherein the first parasitic radiation branch is in coupling connection with the first antenna; the first parasitic radiation branch comprises at least one grounding end, and the at least one grounding end is far away from the main lobe direction of the directional diagram of the first antenna.

Description

Technical Field

[0001] The present application belongs to the field of antenna technology, and specifically relates to an electronic device. Background Art

[0002] Mobile terminals generally require an omnidirectional antenna pattern because incoming waves have random directions. If the antenna pattern is too directional, communication quality will degrade in certain directions, impacting the user experience. In particular, certain frequencies, such as Wi-Fi bands, have maximum Equivalent Isotropic Radiated Power (EIRP) limits. Any frequencies exceeding this limit are subject to mandatory transmission reduction. Therefore, methods to reduce the directivity of mobile phone antennas have high research and practical value.

[0003] Currently, due to limitations in the overall structure of mobile phone terminals and the layout of antennas, antennas are designed into the device with fixed directivity. However, when the antenna is operating, the metal frame's main ground couples energy, stimulating a ground current mode. This current typically flows along the edges of the metal frame, causing the antenna directivity to deflect in the direction of the frame's ground current. This deflection is most pronounced when the antenna is located near a corner of the device, dramatically increasing the antenna's directivity and compromising the spatial coverage of the directivity pattern. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide an electronic device to solve the problem that the directional pattern of the antenna in the existing electronic device cannot meet the spatial coverage requirements when it is working.

[0005] An embodiment of the present application provides an electronic device, including:

[0006] frame;

[0007] A first antenna, comprising a first feeder and a radiating branch, wherein the first feeder is electrically connected to the radiating branch, and the radiating branch is a frame on the frame; and

[0008] A first parasitic radiation branch is provided within the enclosure of the first antenna;

[0009] The first parasitic radiating branch is coupled to the first antenna; the first parasitic radiating branch includes at least one grounding end, and the at least one grounding end is away from the main lobe direction of the radiation pattern of the first antenna.

[0010] In some embodiments, at least one ground end of the first parasitic radiation branch is further away from the main lobe direction of the first antenna's radiation pattern than the output end of the first feed.

[0011] In some embodiments, a distance between a target ground terminal and an output terminal of the first feed is less than 15 mm, and the target ground terminal is a ground terminal farthest from the output terminal of the first feed among the at least one ground terminal of the first parasitic radiating branch.

[0012] In some embodiments, the resonant frequency of the first parasitic radiation branch and the resonant frequency of the first antenna satisfy the following relationship:

[0013] 0.9f1<f0<1.1f1;

[0014] Wherein, f0 represents the resonant frequency of the first parasitic radiation branch, and f1 represents the resonant frequency of the first antenna.

[0015] In some embodiments, at least one ground end of the first parasitic radiation branch is grounded through a loading device or directly grounded.

[0016] In some embodiments, the loading device includes a capacitor or an inductor.

[0017] In some embodiments, the radiation branch includes a first main radiation branch and a second parasitic radiation branch;

[0018] The first end of the first main radiation branch is grounded, the second end of the first main radiation branch is arranged opposite to the first end of the second parasitic radiation branch, and a first gap is formed between the second end of the first main radiation branch and the first end of the second parasitic radiation branch;

[0019] The first feed is electrically connected to a first portion of the first main radiation branch, and the first portion is located between a first end of the first main radiation branch and a second end of the first main radiation branch;

[0020] A second end of the second parasitic radiation branch is grounded.

[0021] In some embodiments, the first antenna is located at the top edge of the frame;

[0022] Wherein, the second parasitic radiation branch is closer to the first long side of the frame than the first main radiation branch;

[0023] The at least one grounding end of the first parasitic radiation branch includes a first grounding end, the first grounding end is away from the first slit and is grounded through a first inductor;

[0024] The first parasitic radiating branch further includes a first open end, the first open end is close to the first slit, and the first open end faces the main lobe direction of the radiation pattern of the first antenna.

[0025] In some embodiments, the first antenna is located on the first long side of the frame;

[0026] Wherein, the second parasitic radiation branch is closer to the top edge of the frame than the first main radiation branch;

[0027] The first parasitic radiation branch includes a third parasitic radiation branch and a fourth parasitic radiation branch. There is a gap between the third parasitic radiation branch and the fourth parasitic radiation branch. The third parasitic radiation branch is closer to the top edge of the frame than the fourth parasitic radiation branch.

[0028] In some embodiments, the at least one ground terminal of the first parasitic radiating branch includes a second ground terminal, the second ground terminal is the ground terminal of the third parasitic radiating branch and is away from the gap, and the second ground terminal is away from the main lobe direction of the radiation pattern of the first antenna; and the electronic device further includes:

[0029] a third grounding terminal, the third grounding terminal being a grounding terminal of the fourth parasitic radiation branch and being away from the gap;

[0030] The second ground terminal and the third ground terminal are both directly grounded.

[0031] In some embodiments, the electronic device further comprises:

[0032] The fourth connection end is located in the gap, spans between the third parasitic radiation branch and the fourth parasitic radiation branch, and is a lumped or distributed inductor / capacitor.

[0033] In some embodiments, the at least one ground terminal of the first parasitic radiation branch includes a fifth ground terminal and a sixth ground terminal;

[0034] The fifth grounding end is a grounding end of the third parasitic radiation branch and is away from the gap;

[0035] The sixth grounding end is the grounding end of the fourth parasitic radiation branch and is close to the gap;

[0036] The fifth ground terminal and the sixth ground terminal are both away from the main lobe direction of the radiation pattern of the first antenna.

[0037] In some embodiments, further comprising: a second antenna and a third antenna;

[0038] The first antenna is located on the first long side of the frame, the second antenna is located on the top side of the frame, and the first antenna and the second antenna are connected to form a T-antenna structure.

[0039] The third antenna is located on the first long side of the frame, and a second gap is formed between the open end of the first antenna away from the second antenna and the ground end of the third antenna;

[0040] The at least one grounding end of the first parasitic radiation branch includes a seventh grounding end, the seventh grounding end is away from the second slit and is grounded through a first capacitor;

[0041] The first parasitic radiating branch further includes a second open end, the second open end is close to the second slit, and the second open end faces the main lobe direction of the radiation pattern of the first antenna.

[0042] In an embodiment of the present application, an electronic device includes a frame; a first antenna, the first antenna including a first feed and a radiating branch, the first feed being electrically connected to the radiating branch, and the radiating branch being a frame on the frame; a first parasitic radiating branch is provided within the enclosure of the first antenna, the first parasitic radiating branch being coupled to the first antenna; the first parasitic radiating branch includes at least one grounding end, the at least one grounding end being away from the main lobe direction of the directional pattern of the first antenna. In this way, by adding the first parasitic radiating branch within the enclosure of the first antenna of the electronic device, with its grounding end being away from the main lobe direction of the directional pattern of the first antenna, the directivity of the antenna can be effectively improved, thereby meeting the spatial coverage requirements of the directional pattern of the antenna in the electronic device when in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic diagram of antenna structure 1 in an electronic device according to an embodiment of the present application;

[0044] Figure 2 is a schematic diagram of the antenna structure in the electronic device in comparison scheme 1;

[0045] Figure 3 2 is a schematic diagram comparing return loss curves of the antenna of the present application and comparative solution 1;

[0046] Figure 4 2 is a schematic diagram comparing the radiation efficiency curves of the antenna of the present application and the comparative solution 1;

[0047] Figure 5 1 is a schematic diagram comparing the antenna directivity relative frequency variation curves of the antenna of the present application and the comparative solution 1;

[0048] Figure 6 This is a schematic diagram comparing the directional patterns of the present application and comparative solution 1 at 5.8 GHz;

[0049] Figure 7 This is a schematic diagram comparing the current distribution of the present application and the comparative solution 1 at 5.8 GHz;

[0050] Figure 8 Schematic diagram comparing the electric field distribution of the present application and comparative solution 1 at 5.8 GHz;

[0051] Figure 9is a schematic diagram of antenna structure 2 in an electronic device according to an embodiment of the present application;

[0052] Figure 10 is a schematic diagram of the antenna structure in the electronic device in comparison scheme 2;

[0053] Figure 11 2 is a schematic diagram comparing the return loss curves of the antenna of the present application and the comparative solution 2;

[0054] Figure 12 2 is a schematic diagram comparing the radiation efficiency curves of the antenna of the present application and the comparative solution 2;

[0055] Figure 13 1 is a schematic diagram comparing the antenna directivity relative frequency variation curves of the antenna of the present application and the comparative solution 2;

[0056] Figure 14 This is a schematic diagram comparing the directional patterns of the present application and the comparative solution 2 at 5.8 GHz;

[0057] Figure 15 This is a schematic diagram comparing the current distribution of the present application and the comparative solution 2 at 5.8 GHz;

[0058] Figure 16 Schematic diagram comparing the electric field distribution of the present application and comparative solution 2 at 5.8 GHz;

[0059] Figure 17 is a schematic diagram of antenna structure three in an electronic device according to an embodiment of the present application;

[0060] Figure 18 2 is a schematic diagram comparing return loss curves of the antenna structure 3 of the present application and the antenna of the comparative solution 2;

[0061] Figure 19 2 is a schematic diagram comparing the radiation efficiency curves of the antenna structure 3 of the present application and the antenna of the comparative solution 2;

[0062] Figure 20 1 is a schematic diagram comparing the antenna directivity relative frequency variation curves of the antenna structure 3 of the present application and the antenna of the comparative solution 2;

[0063] Figure 21 This is a schematic diagram comparing the directional patterns of antenna structure 3 of the present application and comparison solution 2 at 5.2 GHz;

[0064] Figure 22 This is a schematic diagram comparing the directional patterns of antenna structure 3 of the present application and comparison solution 2 at 5.8 GHz;

[0065] Figure 23 Schematic diagram comparing the current distribution of antenna structure 3 of the present application and comparison solution 2 at 5.2 GHz;

[0066] Figure 24 Schematic diagram comparing the electric field distribution of antenna structure 3 of the present application and comparison solution 2 at 5.8 GHz;

[0067] Figure 25 is a schematic diagram of antenna structure 4 in an electronic device according to an embodiment of the present application;

[0068] Figure 26 is a schematic diagram of the antenna structure in the electronic device in comparison scheme three;

[0069] Figure 27 2 is a schematic diagram comparing return loss curves of the antenna structure 4 of the present application and the antenna of the comparative solution 3;

[0070] Figure 28 2 is a schematic diagram comparing the radiation efficiency curves of the antenna structure 4 of the present application and the antenna of the comparative solution 3;

[0071] Figure 29 1 is a schematic diagram comparing the antenna directivity relative frequency variation curves of the antenna structure 4 of the present application and the antenna of the comparative solution 3;

[0072] Figure 30 Schematic diagram comparing the directional patterns of antenna structure 4 of the present application and comparative solution 3 at 5.16 GHz;

[0073] Figure 31 Schematic diagram comparing the directional patterns of antenna structure 4 of the present application and comparative solution 3 at 5.8 GHz;

[0074] Figure 32 2 is a schematic diagram comparing the current distribution of the antenna structure 4 of the present application and the comparative solution 3 at 5.15 GHz;

[0075] Figure 33 2 is a schematic diagram comparing the electric field distribution of antenna structure 4 of the present application and comparison scheme 3 at 5.15 GHz;

[0076] Figure 34 2 is a schematic diagram comparing the current distribution of the antenna structure 4 of the present application and the comparative solution 3 at 5.8 GHz;

[0077] Figure 35 This is a schematic diagram comparing the electric field distribution of antenna structure 4 of the present application and comparison solution 3 at 5.8 GHz. DETAILED DESCRIPTION

[0078] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0079] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0080] It should be noted that in conventional metal / die-cast mobile phone terminals, antennas are generally designed using the metal portion of the frame. Alternatively, existing process technologies can be used to create antenna branches on the plastic frame. Common antenna configurations include inverted-F antennas (IFA), loop antennas, T antennas, single-stage monopole antennas, and the aforementioned antennas with parasitic branches on the frame (which can generally be excited through electromagnetic coupling or jumper devices).

[0081] The design of these conventional antenna configurations generally only considers the efficiency of the antenna itself, with little consideration given to the directional pattern properties. Limited by the overall structure of the mobile terminal and the layout of the antenna, the directional pattern properties of these antenna configurations are fixed once they are designed into the device. The main ground plane of the metal frame significantly influences the shape of the directional pattern. When the antenna is operating, the main ground plane of the metal frame couples energy and excites a ground current mode, which generally flows along the edges of the metal frame. This current pulls the antenna directional pattern toward the direction of the main ground current flow. This deflection is most pronounced when the antenna is located near a corner of the device, causing the antenna's directivity to increase dramatically and compromising the spatial coverage of the directional pattern.

[0082] In order to solve the above technical problems, the present application provides an electronic device. Figures 1 to 35 As shown, the electronic device provided in the embodiment of the present application is described in detail through specific embodiments and their application scenarios.

[0083] An embodiment of the present application provides an electronic device, comprising: a frame 1; a first antenna 2, the first antenna 2 comprising a first feed 21 and a radiating branch 22, the first feed 21 being electrically connected to the radiating branch 22, the radiating branch 22 being a frame on the frame 1; and a first parasitic radiating branch 3 being provided within the enclosure of the first antenna 2; wherein the first parasitic radiating branch 3 is coupled to the first antenna 2; the first parasitic radiating branch 3 comprises at least one ground terminal (31, 33, 34, 35, 36), and the at least one ground terminal (31, 33, 34, 35, 36) is away from the main lobe direction of the directional pattern of the first antenna 2.

[0084] In some embodiments, the first parasitic radiation branch 3 is a laser direct structuring (LDS) parasitic radiation branch or a flexible circuit board (FPC) parasitic radiation branch.

[0085] Specifically, the first parasitic radiation branch 3 is located within the range enclosed by the first antenna 2, coupled to the first antenna 2, and disposed on a first bracket fixed to a side of the mainboard of the electronic device away from the display screen.

[0086] The first parasitic radiating branch 3 is disposed close to the first antenna 2 . It should be understood that in some embodiments, the distance between the first parasitic radiating branch 3 and the first antenna 2 is less than 5 mm to ensure sufficient electromagnetic coupling to excite the first parasitic radiating branch 3 .

[0087] The electronic device of the embodiment of the present application adds a first parasitic radiating branch within the enclosure of the first antenna of the electronic device, and its ground end is away from the main lobe direction of the directional pattern of the first antenna. Compared with the main lobe direction of the directional pattern of the first antenna when the first parasitic radiating branch is not added, the energy distribution in the main lobe direction of the directional pattern of the first antenna with the first parasitic radiating branch added is weakened, and the energy away from the main lobe direction is enhanced, thereby effectively improving the directivity of the antenna and meeting the spatial coverage requirements of the directional pattern of the antenna in the electronic device when it is working.

[0088] In some embodiments, at least one ground end ( 31 , 33 , 34 , 35 , 36 ) of the first parasitic radiating branch 3 is further away from the main lobe direction of the radiation pattern of the first antenna 2 than the output end of the first feed 21 .

[0089] In some embodiments, the distance between the target ground terminal and the output terminal of the first feed 21 is less than 15 mm, and the target ground terminal is the ground terminal farthest from the output terminal of the first feed 21 among the at least one ground terminal ( 31 , 33 , 34 , 35 , 36 ) of the first parasitic radiation branch 3 .

[0090] In the above embodiment, the first parasitic radiating branch 3 is configured in this manner so that, when the first parasitic radiating branch 3 has a fundamental mode size corresponding to 1 / 4 wavelength, the energy distribution in the main lobe direction of the directional pattern of the first antenna 2 with the first parasitic radiating branch 3 is weakened, while the energy in directions away from the main lobe is enhanced, compared to the main lobe direction of the directional pattern of the first antenna 2 without the first parasitic radiating branch 3, thereby improving the directivity of the first antenna 2. However, if the output end of the first feed 21 is further away from the main lobe direction of the directional pattern of the first antenna 2 relative to at least one ground end of the first parasitic radiating branch 3, then when the first parasitic radiating branch 3 is 1 / 4 wavelength, the directional pattern will be further pulled toward the original main lobe direction (compared to the main lobe direction of the directional pattern of the first antenna 2 without the first parasitic radiating branch 3), which will in turn deteriorate the directional pattern, increase the directivity, and be detrimental to the spatial coverage of the directional pattern.

[0091] In some embodiments, the resonant frequency of the first parasitic radiation branch 3 and the resonant frequency of the first antenna 2 satisfy the following relationship:

[0092] 0.9f1<f0<1.1f1;

[0093] Wherein, f0 represents the resonant frequency of the first parasitic radiation branch 3 , and f1 represents the resonant frequency of the first antenna 2 .

[0094] That is to say, the resonant frequency f0 of the first parasitic radiating branch 3 (including the resonant frequency after capacitance / inductance loading) is close to the resonant frequency f1 of the first antenna 2 (specifically, the resonant frequency of the first antenna 2 when the first parasitic radiating branch 3 is not added), which can ensure the coupling effect between the first parasitic radiating branch 3 and the first antenna 2.

[0095] In some embodiments, at least one ground terminal (31, 33, 34, 35, 36) of the first parasitic radiation branch 3 is grounded through a loading device or directly grounded. Optionally, the loading device includes a capacitor or an inductor.

[0096] In this embodiment, at least one ground end of the first parasitic radiating branch 3 is grounded through a loading device or directly grounded in order to adjust the resonant frequency of the first parasitic radiating branch 3 to be close to the target operating frequency, thereby effectively improving the directivity of the antenna.

[0097] The electronic device provided by this application is further described below through several embodiments.

[0098] Example 1

[0099] See also Figure 1The radiating branch 22 of the first antenna 2 includes a first main radiating branch 221 and a second parasitic radiating branch 222; wherein, the first end of the first main radiating branch 221 is grounded, the second end of the first main radiating branch 221 is arranged opposite to the first end of the second parasitic radiating branch 222, and a first slit 223 is defined between the second end of the first main radiating branch 221 and the first end of the second parasitic radiating branch 222; the first feeder 21 is electrically connected to the first main radiating branch 221; and the second end of the second parasitic radiating branch 222 is grounded.

[0100] In the first embodiment, the first antenna 2 is located at the top edge of the frame 1; wherein the second parasitic radiation branch 222 is closer to the first long side of the frame 1 ( Figure 1 The first parasitic radiating branch 3 further comprises a first open-circuit end 32, which is close to the first slit 223 and faces the main lobe direction of the radiation pattern of the first antenna 2.

[0101] It should be understood that the frame 1 includes four frames: a top edge, a bottom edge, a first long side edge, and a second long side edge. The top edge of the frame 1 refers to the edge of the frame 1 that is closest to the earpiece of the electronic device. The bottom edge of the frame 1 is opposite the top edge of the frame 1. The first long side edge of the frame 1 is connected to the top and bottom edges of the frame 1, respectively, and is located on the left side of the user when facing the display of the electronic device. The second long side edge of the frame 1 is opposite the first long side edge.

[0102] from Figure 1 From a holographic perspective, the right side (i.e., first end) of the first main radiating branch 221 is electrically connected to the motherboard ground (i.e., ground). The left side (i.e., second end) of the first main radiating branch 221 is open-circuited, and near the second end is electrically connected to the first feed 21 (antenna feed end), forming an IFA antenna. A second parasitic radiating branch 222 is located opposite the second end (i.e., open-circuited end) of the first main radiating branch 221. The left side (i.e., second end) of the second parasitic radiating branch 222 is electrically connected to the motherboard ground (i.e., ground). The right side (i.e., first end) of the second parasitic radiating branch 222 is open-circuited, forming a first gap 223 with the second end of the first main radiating branch 221.

[0103] A first parasitic radiating branch 3 is provided on the first main radiating branch 221 and the second parasitic radiating branch 222, close to the inner side of the frame 1. The first grounding end (the left end in the figure) of the first parasitic radiating branch 3 is grounded through a first inductor (i.e., electrically connected to the mainboard ground through a loading device).

[0104] Optionally, the first inductor is 1 nH.

[0105] Figure 1In the figure, the first open end 32 of the first parasitic radiation branch 3 faces rightward, and the routing direction from the first ground end 31 to the first open end 32 is the same as the routing direction of the second parasitic radiation branch 222 .

[0106] In this embodiment, the first antenna 2 operates in the N78+WiFi5G frequency band. Since the radiation structure corresponding to the antenna WiFi5G is to the left of the perpendicular bisector of the top edge of the frame 1, in this embodiment, the first parasitic radiation branch 3 needs to be set to the form of left grounding (i.e., the first grounding end) and right open circuit (first open circuit end).

[0107] See also Figure 2 In the conventional solution, it is an IFA+parasitic form of the first main radiation branch 221 + the second parasitic radiation branch 222, without the first parasitic radiation branch 3.

[0108] In a conventional solution without parasitic radiating branches, the slot-common mode (slot-CM) in the WiFi 5G frequency band is mainly composed of the monopole mode from the output end of the first feed 21 to the open end (second end) of the first main radiating branch 221 and the 1 / 4 parasitic mode of the second parasitic radiating branch 222. Because the radiation area is located to the left of the perpendicular bisector of the top edge of the frame 1, it is affected by the main ground structure of the frame and the equivalent inductance formed by the output end of the first feed 21 to the ground end of the first main radiating branch 221. This will generate a strong traveling wave current toward the right, thereby pulling the overall radiation pattern of the first antenna 2 to the right, resulting in improved directivity.

[0109] See also Figure 1 In the embodiment, a first parasitic radiating branch 3 is added, with a grounded end on the left and an open end on the right, and the first parasitic radiating branch 3 is made to resonate at about 5.8 GHz. At the same time, the first parasitic radiating branch 3 is arranged at the interface of the second end of the first main radiating branch 221. On the one hand, it can cooperate with the second parasitic radiating branch 222 to increase the antenna aperture in the radiation area and improve the antenna radiation efficiency; on the other hand, it enhances the coupling of antenna energy in the left area, so that the antenna energy distribution is pulled to the left, competing with the above-mentioned traveling wave current mode toward the right, improving the uniformity of the overall energy distribution, and helping to reduce the antenna directivity.

[0110] See also Figure 3 , is the subject of this application ( Figure 1 The antenna structure shown in the figure) and the comparative scheme (i.e. the scheme without parasitic radiation branches, see Figure 2 ) Antenna return loss curve comparison diagram. Figure 4, which is a schematic diagram comparing the radiation efficiency curves of the antennas of the present application and the comparative solution (i.e., the solution without parasitic radiating branches). The solid black line corresponds to the present application, and the dashed black line corresponds to the comparative solution. It can be seen that the addition of the first parasitic radiating branch 3 in the present application has little impact on the overall return loss, while also improving the WiFi 5G aperture radiation efficiency by 0.5dB.

[0111] See also Figure 5 , for this application ( Figure 1 The antenna structure shown) and the comparative scheme (i.e. the scheme without parasitic radiation branches, see Figure 2 ) Schematic diagram comparing the antenna directivity versus frequency curves of the antenna. The solid black line corresponds to the present application, and the dashed black line corresponds to the comparative solution. As can be seen, the addition of the first parasitic radiating branch 3 in the present application effectively reduces the directivity by 1.2dB in the 5.75-5.85GHz WiFi 5G frequency band.

[0112] See also Figure 6 , for this application ( Figure 1 The antenna structure shown) and the comparative scheme (i.e. the scheme without parasitic radiation branches, see Figure 2 ) Schematic diagram comparing the antenna patterns at 5.8 GHz. Compared to the comparison scheme, the antenna pattern of this application has a more even energy distribution on both sides relative to the yoz plane (the plane perpendicular to the top edge), effectively reducing the antenna directivity by 1.1 dB.

[0113] See also Figure 7 , for this application ( Figure 1 The antenna structure shown) and the comparative scheme (i.e. the scheme without parasitic radiation branches, see Figure 2 ) Schematic diagram of current distribution comparison at 5.8 GHz. Figure 8 , for this application ( Figure 1 The antenna structure shown) and the comparative scheme (i.e. the scheme without parasitic radiation branches, see Figure 2 ) Comparison diagram of electric field distribution at 5.8GHz. This application adds a first parasitic radiation branch 3 and makes it resonate at 5.8GHz, which can effectively regulate the energy distribution of the entire antenna when it is working. Compared with the comparative solution, this application reduces the energy distribution of the antenna energy on the right side of the yoz plane and increases the energy distribution on the left side, making the energy distribution more balanced and effectively improving the directional index of the directional pattern. At the same time, through Figure 7 It can be seen that the current on the first parasitic radiation branch 3 and the current on the second parasitic radiation branch 222 are in the same direction, which increases the antenna radiation aperture and improves the antenna radiation efficiency.

[0114] Example 2

[0115] See also Figure 9The radiating branch 22 of the first antenna 2 includes a first main radiating branch 221 and a second parasitic radiating branch 222; wherein, the first end of the first main radiating branch 221 is grounded, the second end of the first main radiating branch 221 is arranged opposite to the first end of the second parasitic radiating branch 222, and a first slit 223 is defined between the second end of the first main radiating branch 221 and the first end of the second parasitic radiating branch 222; the first feeder 21 is electrically connected to the first main radiating branch 221; and the second end of the second parasitic radiating branch 222 is grounded.

[0116] In the second embodiment, the first antenna 2 is located on the first long side of the frame 1 ( Figure 10 wherein, the second parasitic radiation branch 222 is closer to the top edge of the frame 1 relative to the first main radiation branch 221.

[0117] The first parasitic radiation branch 3 includes a third parasitic radiation branch 37 and a fourth parasitic radiation branch 38 . A gap 100 is defined between the third parasitic radiation branch 37 and the fourth parasitic radiation branch 38 . The third parasitic radiation branch 37 is closer to the top edge of the frame 1 than the fourth parasitic radiation branch 38 .

[0118] In this second embodiment, at least one grounding end of the first parasitic radiating branch 3 includes a second grounding end 33, which is the grounding end of the third parasitic radiating branch 37 and is away from the gap 100. The second grounding end 33 is away from the main lobe direction of the radiation pattern of the first antenna 2.

[0119] The electronic device further includes a third ground terminal 381 , which is a ground terminal of the fourth parasitic radiation branch 38 and is away from the gap 100 ; the second ground terminal 33 and the third ground terminal 381 are both directly grounded.

[0120] It should be understood that the second embodiment corresponds to Figure 9 The middle gap 100 does not have the fourth connection end 4 .

[0121] Example 3

[0122] Based on Example 2, see Figure 9 Furthermore, the electronic device also includes: a fourth connection terminal 4, the fourth connection terminal 4 is located in the gap 100, spanning between the third parasitic radiation branch 37 and the fourth parasitic radiation branch 38, and is a lumped or distributed inductor / capacitor.

[0123] Optionally, the fourth connection terminal 8 is a second inductor.

[0124] In the second and third embodiments, Figure 9From a holographic perspective, the bottom side (i.e., first end) of the first main radiating branch 221 is electrically connected to the motherboard ground (i.e., ground). The top side (i.e., second end) of the first main radiating branch 221 is open-circuited, and near the second end is electrically connected to the first feed 21 (antenna feed end), forming an IFA antenna. A second parasitic radiating branch 222 is located opposite the second end (i.e., open-circuited end) of the first main radiating branch 221. The top side (i.e., second end) of the second parasitic radiating branch 222 is electrically connected to the motherboard ground (i.e., ground). The bottom side (i.e., first end) of the second parasitic radiating branch 222 is open-circuited, forming a first gap 223 with the second end of the first main radiating branch 221.

[0125] A first parasitic radiating branch 3 is provided near the inner side of the frame 1, between the first main radiating branch 221 and the second parasitic radiating branch 222. The first parasitic radiating branch 3 includes a third parasitic radiating branch 37 and a fourth parasitic radiating branch 38. A gap 100 is defined between the third and fourth parasitic radiating branches 37 and 38, and the third parasitic radiating branch 37 is closer to the top edge of the frame 1 than the fourth parasitic radiating branch 38. The upper side of the third parasitic radiating branch 37 (i.e., the second grounding terminal 33) is short-circuited to ground (i.e., directly connected to ground), and the second grounding terminal 33 is away from the main lobe direction of the first antenna 2's radiation pattern. The lower side of the fourth parasitic radiating branch 38 (i.e., the third grounding terminal 381) is short-circuited to ground (i.e., directly connected to ground). This corresponds to the second embodiment. In this case (i.e., when the gap 100 lacks the fourth connection terminal 4), the distance between either the second grounding terminal 33 or the third grounding terminal 381 and the output terminal of the first feeder 21 is less than 15 mm.

[0126] In the third embodiment, based on the second embodiment, the electronic device further includes a fourth connection terminal 4. The fourth connection terminal 4 is located in the gap 100 and bridges between the third parasitic radiating branch 37 and the fourth parasitic radiating branch 38. The fourth connection terminal 4 is a lumped or distributed inductor / capacitor. Optionally, the fourth connection terminal 4 is a second inductor, and the second inductor is 2.7 nH.

[0127] Here, the lower side of the fourth parasitic radiating branch 38 (i.e., the third grounding terminal 381) is short-circuited to the ground (i.e., directly grounded), and the fourth connection terminal 4 is located in the gap 100, bridged between the third parasitic radiating branch 37 and the fourth parasitic radiating branch 38, and is a lumped or distributed inductor / capacitor, both of which play a tuning role, the purpose of which is to regulate the resonant frequency of the first parasitic radiating branch 3 to near the target operating frequency, thereby effectively improving the directivity of the antenna.

[0128] In the second and third embodiments, the first antenna 2 operates in the N41+WiFi5G frequency band. Based on the third embodiment, the first parasitic radiation branch 3 can be made to resonate in the WiFi5G frequency band.

[0129] See also Figure 10In the conventional solution, it is an IFA+parasitic form of the first main radiation branch 221 + the second parasitic radiation branch 222, without the first parasitic radiation branch 3.

[0130] Figure 10 In the conventional scheme shown (the scheme without the first parasitic radiating branch), the WiFi5G frequency band is mainly composed of the monopole mode from the output end of the first feed 21 to the open end (second end) of the first main radiating branch 221 and the 1 / 4 parasitic mode of the second parasitic radiating branch 222, which together constitute the slot-CM mode. Since the radiation structure corresponding to the WiFi5G antenna is located above the perpendicular bisector of the first long side of the frame 1, the radiation pattern is naturally downward and has a high directivity.

[0131] This application ( Figure 9 The antenna structure shown in the figure adds a first parasitic radiation branch 3, which resonates in the WiFi5G frequency band, so that the antenna energy distribution is pulled toward the middle back, which can improve the radiation in the back area and upper area of ​​the electronic device, reduce the bottom edge radiation, improve the uniformity of the overall energy distribution, and help reduce the antenna directivity.

[0132] See also Figure 11 , is the subject of this application ( Figure 9 The antenna structure shown) and the comparative scheme (ie the conventional scheme without parasitic radiation branches, see Figure 10 ) Antenna return loss curve comparison diagram. Figure 12 , is the subject of this application ( Figure 9 The antenna structure shown) and the comparative scheme (ie the conventional scheme without parasitic radiation branches, see Figure 10 Schematic diagram comparing the radiation efficiency curves of the antenna. The solid black line corresponds to the present application, while the dashed black line corresponds to the comparative solution. As can be seen, the addition of the first parasitic radiating branch 3 in the present application has little impact on the overall return loss, while also keeping the impact on the WiFi 5G aperture radiation efficiency to within 0.5dB.

[0133] See also Figure 13 , for this application ( Figure 9 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 10 ) Schematic diagram comparing the antenna directivity versus frequency curves of the antenna. The solid black line corresponds to the present application, and the dashed black line corresponds to the comparative solution. As can be seen, the addition of the first parasitic radiating branch 3 in the present application effectively reduces the directivity in the 5.75-5.85 GHz WiFi 5G band by 1.2-1.4 dB.

[0134] See also Figure 14 , for this application ( Figure 9 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 10) Schematic diagram comparing the antenna patterns at 5.8 GHz. Compared to the comparison scheme, the antenna pattern of this application has more uniform energy distribution above and below the xoz plane (the plane perpendicularly bisecting the long side). The first parasitic radiating branch 3 effectively improves radiation at the back and near the top edge, while reducing radiation at the bottom edge.

[0135] See also Figure 15 , for this application ( Figure 9 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 10 ) Schematic diagram of current distribution comparison at 5.8 GHz. Figure 16 , for this application ( Figure 9 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 10 ) is a schematic diagram showing the comparison of electric field distribution at 5.8 GHz. Figure 9 The antenna structure shown in FIG1 adds a first parasitic radiation branch 3 and makes it resonate in the WiFi 5G frequency band, which can effectively control the energy distribution on the whole device when the antenna is working. Compared with the comparative scheme (i.e., the conventional scheme without parasitic radiation branches, see Figure 10 ), the present application makes the antenna current weakened in the second parasitic radiation branch 222, while the current is stronger in the first parasitic radiation branch 3 and presents a half-wave current pattern, resulting in a stronger energy distribution in the back area and improving the antenna directivity.

[0136] For Example 2 and Example 3, by adding the first parasitic radiation branch 3 to construct a half-wave mode and adjusting the resonant frequency to within the working frequency band, energy can be effectively coupled, and the radiation in the back area of ​​the entire device can be improved, thereby reducing directivity and having little impact on antenna efficiency.

[0137] Example 4

[0138] See also Figure 17 The radiating branch 22 of the first antenna 2 includes a first main radiating branch 221 and a second parasitic radiating branch 222; wherein, the first end of the first main radiating branch 221 is grounded, the second end of the first main radiating branch 221 is arranged opposite to the first end of the second parasitic radiating branch 222, and a first slit 223 is defined between the second end of the first main radiating branch 221 and the first end of the second parasitic radiating branch 222; the first feeder 21 is electrically connected to the first main radiating branch 221; and the second end of the second parasitic radiating branch 222 is grounded.

[0139] In the fourth embodiment, the first antenna 2 is located on the first long side of the frame 1 ( Figure 17 wherein, the second parasitic radiation branch 222 is closer to the top edge of the frame 1 relative to the first main radiation branch 221.

[0140] The first parasitic radiation branch 3 includes a third parasitic radiation branch 37 and a fourth parasitic radiation branch 38 . A gap 100 is defined between the third parasitic radiation branch 37 and the fourth parasitic radiation branch 38 . The third parasitic radiation branch 37 is closer to the top edge of the frame 1 than the fourth parasitic radiation branch 38 .

[0141] Here, at least one grounding terminal of the first parasitic radiating branch 3 includes a fifth grounding terminal 34 and a sixth grounding terminal 35; wherein, the fifth grounding terminal 34 is the grounding terminal of the third parasitic radiating branch 37 and is away from the gap 100; the sixth grounding terminal 35 is the grounding terminal of the fourth parasitic radiating branch 38 and is close to the gap 100; the fifth grounding terminal 34 and the sixth grounding terminal 35 are both away from the main lobe direction of the radiation pattern of the first antenna 2.

[0142] Here, the fifth ground terminal 34 is a target ground terminal, and the distance between the target ground terminal and the output terminal of the first feeder 21 is less than 15 mm. That is, it is the ground terminal farthest from the output terminal of the first feeder 21 among the at least one ground terminal (the fifth ground terminal 34 and the sixth ground terminal 35) of the first parasitic radiating branch 3.

[0143] Optionally, the fifth ground terminal 34 is directly grounded, and the sixth ground terminal 35 is grounded via a third inductor. Optionally, the third inductor is 1 nH and can be a distributed inductor or a lumped element.

[0144] In the fourth embodiment, the first antenna 2 operates in the N41+WiFi5G frequency band. The first parasitic radiation branch 3 can resonate in the WiFi5G frequency band.

[0145] See also Figure 10 In the conventional solution, it is an IFA+parasitic form of the first main radiation branch 221 + the second parasitic radiation branch 222, without the first parasitic radiation branch 3.

[0146] Figure 10 In the conventional scheme shown (the scheme without the first parasitic radiating branch), the WiFi5G frequency band is mainly composed of the monopole mode from the output end of the first feed 21 to the open end (second end) of the first main radiating branch 221 and the 1 / 4 parasitic mode of the second parasitic radiating branch 222, which together constitute the slot-CM mode. Since the radiation structure corresponding to the WiFi5G antenna is located above the perpendicular bisector of the first long side of the frame 1, the radiation pattern is naturally downward and has a high directivity.

[0147] This application ( Figure 17 The antenna structure shown in the figure adds a first parasitic radiation branch 3, which resonates in the WiFi5G frequency band, so that the antenna energy distribution is pulled toward the upper area, which can increase the radiation of the upper area of ​​the electronic device and reduce the bottom edge radiation, thereby improving the uniformity of the overall energy distribution and helping to reduce the antenna directivity.

[0148] See also Figure 18 , is the subject of this application ( Figure 17 The antenna structure shown) and the comparative scheme (ie the conventional scheme without parasitic radiation branches, see Figure 10 ) Antenna return loss curve comparison diagram. Figure 19 , is the subject of this application ( Figure 17 The antenna structure shown) and the comparative scheme (ie the conventional scheme without parasitic radiation branches, see Figure 10 Schematic diagram comparing the radiation efficiency curves of the antenna. The solid black line corresponds to the present application, and the dashed black line corresponds to the comparative solution. It can be seen that the addition of the first parasitic radiating branch 3 in the present application has little impact on the overall return loss and WiFi 5G aperture radiation efficiency.

[0149] See also Figure 20 , for this application ( Figure 17 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 10 ) antenna directivity relative frequency curve comparison diagram. The black solid line corresponds to the present application, and the black dotted line corresponds to the comparative solution. It can be seen that the present application ( Figure 17 The antenna structure shown in the figure) adds a first parasitic radiation branch 3, which effectively reduces the directivity of the WiFi5G frequency band 5.75-5.85GHz by 1.2 to 1.3dB, and the directivity of 5.15-5.35GHz by 1.2 to 1.5dB.

[0150] See also Figure 21 , for this application ( Figure 17 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 10 ) is a schematic diagram comparing the directional patterns at 5.2 GHz. Compared to the comparative scheme, this application ( Figure 17 The antenna pattern (shown in the figure) has a more uniform energy distribution on both sides of the xoz plane (the plane perpendicular to the long side). The first parasitic radiating branch 3 effectively improves the radiation near the top edge and reduces the radiation at the bottom edge.

[0151] See also Figure 22 , for this application ( Figure 17 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 10 ) at 5.8GHz. Compared with the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 10 ), this application ( Figure 17 The antenna pattern (shown in the figure) has a more uniform energy distribution on both sides of the xoz plane (the plane perpendicular to the long side). The first parasitic radiating branch 3 effectively improves the radiation near the top edge and reduces the radiation at the bottom edge.

[0152] See also Figure 23 , for this application ( Figure 17 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 10 ) Comparison diagram of current distribution at 5.2 GHz. Figure 24 , for this application ( Figure 17 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 10 ) is a comparison diagram of current distribution at 5.8GHz. This application adds a first parasitic radiation branch 3 and makes it resonate in the WiFi5G frequency band, which can effectively control the energy distribution on the whole device when the antenna is working. Compared with the comparison scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 10 ), this application ( Figure 17 The antenna structure shown in FIG2 makes the antenna current weaken in the second parasitic radiation branch 222, while the current is stronger in the first parasitic radiation branch 3, resulting in a stronger energy distribution near the top edge, thereby improving the antenna directivity.

[0153] Example 5

[0154] See also Figure 25 The electronic device includes a first antenna 2, a second antenna 5, and a third antenna 6; wherein the first antenna 2 is located on the first long side of the frame 1, the second antenna 5 is located on the top side of the frame 1, and the first antenna 2 and the second antenna 5 are connected to form a T-antenna structure; the third antenna 6 is located on the first long side of the frame 1, and a second slit 7 is provided between the open end of the first antenna 2 away from the second antenna 5 and the ground end of the third antenna 6; at least one ground end of the first parasitic radiating branch 3 includes a seventh ground end 36, the seventh ground end 36 is away from the second slit 7, and is grounded through a first capacitor.

[0155] The first parasitic radiation branch 3 further includes a second open end 39 , which is close to the second slit 7 and faces the main lobe direction of the radiation pattern of the first antenna 2 .

[0156] from Figure 25 From the perspective of the first antenna 2, the first antenna 2 is located on the left long side (first long side) of the frame 1, near the upper left corner, with the ground terminal at the upper left corner. The open end of the first antenna 2, away from the second antenna 5, faces the bottom edge of the frame 1. A second slit 7 is located between the open end of the first antenna 2, away from the second antenna 5, and the ground terminal of the third antenna 6. A first parasitic radiating branch 3 is located on the right side of the first antenna 2. The seventh ground terminal 36 of the first parasitic radiating branch 3 is near the upper left corner of the frame 1, away from the second slit 7. The seventh ground terminal 36 is grounded via a first capacitor. Optionally, the first capacitor is 1.2pF.

[0157] In this embodiment, the first antenna 2 operates in the N78+WiFi5G frequency band.

[0158] See also Figure 26 When operating in the WiFi 5G frequency band, the comparison solution (i.e., the conventional solution without parasitic radiating branches) not only excites the monopole mode with the first antenna, but also excites the T-CM mode with the T-structure formed by the first antenna 2 and the second antenna 5. The third antenna 6 also exhibits strong coupling, generating a T-DM (differential mode) mode. Due to the presence of the third antenna 6, the energy of the first antenna 2 is drawn toward the bottom edge of the frame 1. The T-CM mode excited by the T-structure formed by the first antenna 2 and the second antenna 5 produces strong coupling with the motherboard ground within the frame 1, stimulating a strong traveling wave current along the long side of the frame 1 toward the bottom edge, causing the radiation pattern of the first antenna 2 to tilt toward the bottom edge.

[0159] This application ( Figure 25 The first parasitic radiating branch 3 of the antenna structure shown in the figure can be loaded with 1.2pF to resonate at 5.5GHz, which has a strong capture and binding effect on WiFi5G energy, can reduce the coupling from the first antenna 2 to the third antenna 6, and reduce the weight of the traveling wave current mode in the direction of the long side of the frame 1 toward the bottom edge, so that the proportion of energy in the radiation pattern of the first antenna 2 toward the top edge of the frame 1 increases, the upper and lower energy distribution is more balanced, and the directivity can be reduced.

[0160] See also Figure 27 , is the subject of this application ( Figure 25 The antenna structure shown) and the comparative scheme (ie the conventional scheme without parasitic radiation branches, see Figure 26 Schematic diagram of the return loss curve comparison of the antenna. Figure 28 , is the subject of this application ( Figure 25 The antenna structure shown) and the comparative scheme (ie the conventional scheme without parasitic radiation branches, see Figure 26 ) antenna radiation efficiency curve comparison diagram. The black solid line corresponds to the present application, and the black dotted line corresponds to the comparison scheme. It can be seen that the present application ( Figure 25By adding a first parasitic radiating branch 3 to the antenna structure shown in FIG3 , the antenna return loss can still be maintained below -6dB, which can be improved through matching. It can also be seen that the first parasitic radiating branch 3 resonates at 5.5 GHz, which will cause a decrease in aperture efficiency at the resonant frequency. However, the aperture radiation efficiency is slightly improved for the operating frequency band of 5.15-5.35 GHz, while it is slightly reduced for the operating frequency band of 5.75-5.85 GHz. This is because the capacitance and inductance of the first parasitic radiating branch 3 are different before and after the resonant frequency of 5.5 GHz. The coupled current is superimposed in the same direction with the first antenna 2 at 5.15-5.35 GHz, increasing the antenna aperture and improving the radiation efficiency. However, at 5.75-5.85 GHz, the current is superimposed in the opposite direction, resulting in cancellation and reducing the radiation efficiency. In this embodiment, the actual impact is very small, within 0.5 dB.

[0161] See also Figure 29 , for this application ( Figure 25 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 26 ) antenna directivity relative frequency curve comparison diagram. The black solid line corresponds to the present application, and the black dotted line corresponds to the comparative solution. It can be seen that the present application ( Figure 25 The antenna structure shown in the figure) adds a first parasitic radiation branch 3, which effectively reduces the directivity of the WiFi5G frequency band 5.15-5.35GHz by 0.3-1dB and the directivity of 5.75-5.85GHz by 1.5-1.8dB.

[0162] See also Figure 30 , for this application ( Figure 25 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 26 ) at 5.16GHz. Figure 31 , for this application ( Figure 25 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 26 ) Schematic diagram of the 5.8GHz radiation pattern comparison. The comparison scheme shows that the antenna pattern radiates mainly toward the bottom edge. Compared with the comparison scheme, the present application provides a first parasitic radiating branch 3 with an open end facing downward and a grounded end near the corner. This can enhance the radiation of the antenna pattern in the upper hemisphere, making the energy distribution between the upper and lower parts more uniform and reducing the directivity.

[0163] See also Figure 32 , for this application ( Figure 25 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 26 ) Schematic diagram of current distribution comparison at 5.15 GHz. Figure 33 , for this application ( Figure 25The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 26 ) Schematic diagram of the comparison of electric field distribution at 5.15 GHz. Figure 34 , for this application ( Figure 25 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 26 ) Schematic diagram of current distribution comparison at 5.8 GHz. Figure 35 , for this application ( Figure 25 The antenna structure shown) and the comparative scheme (i.e. the conventional scheme without parasitic radiation branches, see Figure 26 ) Schematic diagram of the comparison of electric field distribution at 5.8 GHz.

[0164] This application ( Figure 25 The antenna structure shown in the figure adds a first parasitic radiation branch 3 and makes it resonate at 5.5 GHz, which can effectively regulate the energy distribution on the entire device when the antenna is working. Compared with the comparative scheme, the present application reduces the field distribution intensity of the first antenna 2 in the downward direction of the long side of the frame 1, reduces the proportion of the directional pattern radiating toward the bottom edge, and is conducive to the uniformity of the upper and lower energy distribution, and has lower directivity.

[0165] The above embodiments are merely examples of antenna types, and the electronic device of the present application is applicable to various antenna types.

[0166] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0167] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. An electronic device, characterized in that: include: frame; A first antenna, comprising a first feeder and a radiating branch, wherein the first feeder is electrically connected to the radiating branch, and the radiating branch is a frame on the frame; as well as, A first parasitic radiation branch is provided within the enclosure of the first antenna; The first parasitic radiating branch is coupled to the first antenna; the first parasitic radiating branch includes at least one grounding end, and the at least one grounding end is away from the main lobe direction of the radiation pattern of the first antenna.

2. The electronic device according to claim 1, wherein At least one ground end of the first parasitic radiation branch is further away from the main lobe direction of the first antenna's radiation pattern than the output end of the first feeder.

3. The electronic device according to claim 1, wherein The distance between the target ground terminal and the output terminal of the first feeder is less than 15 mm, and the target ground terminal is the ground terminal farthest from the output terminal of the first feeder among the at least one ground terminal of the first parasitic radiation branch.

4. The electronic device according to claim 1, wherein: The resonant frequency of the first parasitic radiation branch and the resonant frequency of the first antenna satisfy the following relationship: 0.9f1<f0<1.1f1; Wherein, f0 represents the resonant frequency of the first parasitic radiation branch, and f1 represents the resonant frequency of the first antenna.

5. The electronic device according to claim 1, wherein At least one grounding end of the first parasitic radiation branch is grounded through a loading device or directly grounded.

6. The electronic device according to claim 5, characterized in that The loading device includes a capacitor or an inductor.

7. The electronic device according to claim 1, wherein: The radiation branches include a first main radiation branch and a second parasitic radiation branch; The first end of the first main radiation branch is grounded, the second end of the first main radiation branch is arranged opposite to the first end of the second parasitic radiation branch, and a first gap is formed between the second end of the first main radiation branch and the first end of the second parasitic radiation branch; The first feed is electrically connected to the first main radiation branch; A second end of the second parasitic radiation branch is grounded.

8. The electronic device according to claim 7, wherein: The first antenna is located at the top edge of the frame; Wherein, the second parasitic radiation branch is closer to the first long side of the frame than the first main radiation branch; The at least one grounding end of the first parasitic radiation branch includes a first grounding end, the first grounding end is away from the first slit and is grounded through a first inductor; The first parasitic radiating branch further includes a first open end, the first open end is close to the first slit, and the first open end faces the main lobe direction of the radiation pattern of the first antenna.

9. The electronic device according to claim 7, wherein: The first antenna is located on the first long side of the frame; Wherein, the second parasitic radiation branch is closer to the top edge of the frame than the first main radiation branch; The first parasitic radiation branch includes a third parasitic radiation branch and a fourth parasitic radiation branch. There is a gap between the third parasitic radiation branch and the fourth parasitic radiation branch. The third parasitic radiation branch is closer to the top edge of the frame than the fourth parasitic radiation branch.

10. The electronic device according to claim 9, wherein: The at least one grounded end of the first parasitic radiating branch includes a second grounded end, the second grounded end is the grounded end of the third parasitic radiating branch and is away from the gap, and the second grounded end is away from the main lobe direction of the radiation pattern of the first antenna; The electronic device further comprises: a third grounding terminal, the third grounding terminal being a grounding terminal of the fourth parasitic radiation branch and being away from the gap; The second ground terminal and the third ground terminal are both directly grounded.

11. The electronic device according to claim 10, characterized in that The electronic device further comprises: The fourth connection end is located in the gap, spans between the third parasitic radiation branch and the fourth parasitic radiation branch, and is a lumped or distributed inductor / capacitor.

12. The electronic device according to claim 9, wherein: The at least one ground terminal of the first parasitic radiation branch includes a fifth ground terminal and a sixth ground terminal; The fifth grounding end is a grounding end of the third parasitic radiation branch and is away from the gap; The sixth grounding end is the grounding end of the fourth parasitic radiation branch and is close to the gap; The fifth ground terminal and the sixth ground terminal are both far away from the main lobe direction of the radiation pattern of the first antenna.

13. The electronic device according to claim 1, wherein Also includes: a second antenna and a third antenna; The first antenna is located on the first long side of the frame, the second antenna is located on the top side of the frame, and the first antenna and the second antenna are connected to form a T-antenna structure. The third antenna is located on the first long side of the frame, and a second gap is formed between the open end of the first antenna away from the second antenna and the ground end of the third antenna; The at least one grounding end of the first parasitic radiation branch includes a seventh grounding end, the seventh grounding end is away from the second slit and is grounded through a first capacitor; The first parasitic radiation branch further includes a second open end, the second open end is close to the second slit, and the second open end faces the main lobe direction of the radiation pattern of the first antenna.

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