Dual-frequency antenna and electronic equipment

Abstract

The embodiment of the utility model discloses a dual-frequency antenna and an electronic device, which utilize an installation part to bear a waveguide component and utilize a coaxial line to feed an antenna unit. Therefore, on one hand, the waveguide component is electrically connected with the protective shell to form a first electric path and a second electric path which are respectively coupled with the first radiation pattern and the second radiation pattern. Therefore, the signal gain of the antenna in the specific direction is improved, the dual-frequency antenna can stably transmit and receive low-frequency signals and high-frequency signals, and mutual interference is reduced. And on the other hand, the path length of the first electric path and the path length of the second electric path are increased through the protection shell, so that the overlapped electromagnetic signals have larger bandwidth, and the radiation performance of the dual-frequency antenna is improved. And on the other hand, the protective shell can directly cover the outer side of the antenna unit, so that metal breakpoints are prevented from being formed on the protective shell. Therefore, the manufacturing process of the dual-frequency antenna is simplified, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of communications, in particular to a dual-frequency antenna and electronic equipment. Background Art

[0002] Metal breakpoints in the housing of an electronic device can be used to separate the housing into distinct areas, making it easier to install an antenna within the housing, ensuring optimal antenna transmission and reception performance while preventing interference from the housing. However, these breakpoints also increase manufacturing costs and reduce mechanical strength. Reducing the manufacturing complexity while ensuring optimal antenna transmission and reception performance is a challenge. Utility Model Content

[0003] In view of this, an embodiment of the present invention provides a dual-band antenna and electronic device, which electrically connects the antenna unit to the protective shell and forms a first electrical path and a second electrical path for signal superposition with the first radiation pattern and the second radiation pattern respectively, thereby improving the radiation performance of the antenna and simplifying the manufacturing cost of the protective shell.

[0004] According to a first aspect of an embodiment of the present invention, a dual-band antenna is provided, comprising:

[0005] Coaxial cable;

[0006] protective casing; and

[0007] an antenna unit electrically connected to the coaxial line and comprising a mounting portion and a waveguide component disposed on the mounting portion, the waveguide component comprising a main radiation pattern and a connecting portion, the protective shell being disposed on the antenna unit and electrically connected to the waveguide component via the connecting portion, the waveguide component and the protective shell forming a first electrical path and a second electrical path, the main radiation pattern comprising a first radiation pattern and a second radiation pattern directed toward an inner wall of the protective shell, the first radiation pattern being coupled to the first electrical path, and the second radiation pattern being coupled to the second electrical path;

[0008] The antenna unit is configured such that an electromagnetic signal fed from the coaxial line into the waveguide component is superimposed on the first radiation pattern through the first electrical path to form a high-frequency signal, and the electromagnetic signal is superimposed on the second radiation pattern through the second electrical path to form a low-frequency signal.

[0009] Furthermore, the waveguide component further includes a feeding point and a grounding point, and the electromagnetic signal of the feeding point is conducted to the grounding point through the first electrical path and the second electrical path respectively;

[0010] The connecting portion includes a first electrical contact area and a second electrical contact area that are spaced apart;

[0011] The protective shell includes a frame, which is arranged around a portion of the antenna unit and abuts against the first electrical contact area and the second electrical contact area. The frame between the first electrical contact area and the second electrical contact area forms a portion of the second electrical path.

[0012] Furthermore, the frame includes a first stop bar and a second stop bar, and the first stop bar and the second stop bar are vertically connected;

[0013] The first electrical contact area and the second electrical contact area abut against the first blocking bar and the second blocking bar respectively, and the main radiation pattern corresponds to the first blocking bar.

[0014] Furthermore, the mounting portion is L-shaped and includes a first section and a second section in the extension direction, and the first section and the second section are respectively arranged corresponding to the first stop bar and the second stop bar;

[0015] The waveguide component includes a conductive pattern, which includes the main radiation pattern, a first branch and a ground pattern. The main radiation pattern, the feeding point and the ground point are arranged on the surface of the first section. The first branch is arranged in the second section, and one end is electrically connected to the ground point through the ground pattern, and the other end extends toward the first baffle to form the second electrical contact area.

[0016] Furthermore, the second section is provided with a mounting groove;

[0017] The waveguide component further includes a radio frequency switch, which is disposed in the mounting groove and has multiple conduction states. The radio frequency switch is connected between the first branch and the ground pattern.

[0018] Furthermore, the mounting portion includes a first layout surface, a second layout surface and a third layout surface, the first layout surface and the third layout surface are opposite to each other, the second layout surface is located between the first layout surface and the third layout surface, the main radiation pattern is arranged on the second layout surface, the first electrical contact area and the second electrical contact area are arranged on the first layout surface, and at least part of the grounding pattern is arranged on the third layout surface.

[0019] Furthermore, the length of the first branch is L1, the length of the frame between the first electrical contact area and the second electrical contact area in the extension direction of the frame is L2, and the length of the ground pattern is L3;

[0020] L=(1 / 2)×λ2, where L is the length of the second electrical path, L=L1+L2+L3, and λ2 is the wavelength of the low-frequency signal.

[0021] Furthermore, the conductive pattern also includes a second branch, one end of the second branch is electrically connected to the second radiation pattern, the other end extends toward the first radiation pattern and is electrically connected to the feed point and the first radiation pattern, and the first electrical contact area extends from the second branch to the first baffle.

[0022] Furthermore, the protective shell further includes a first plate, which is fixedly connected to the frame and forms the positioning groove;

[0023] The connecting portion further includes a third electrical contact area, and the third electrical contact area, the first blocking bar, and the first plate form a portion of the first electrical path.

[0024] Furthermore, the antenna unit further includes a metal screw;

[0025] The third electrical contact area defines a first through hole, and the mounting portion defines a second through hole;

[0026] The protective shell further includes a positioning column fixedly connected to the frame, and the positioning column is provided with a threaded hole;

[0027] The metal screw passes through the first through hole and the second through hole and is screwed to the threaded hole, and the table of the positioning column abuts against the mounting portion, and the third electrical contact area is electrically connected to the frame through the metal screw.

[0028] Further, the waveguide component includes a conductive pattern, and the conductive pattern includes the main radiation pattern and a ground pattern;

[0029] The mounting portion includes a second layout surface and a fourth layout surface, the second layout surface and the fourth layout surface are opposite to each other, the main radiation pattern is arranged on the second layout surface, and part of the ground pattern is arranged on the fourth layout surface and abuts against the first plate.

[0030] Furthermore, the mounting portion further includes a third layout surface, the third layout surface is located between the second layout surface and the fourth layout surface, and the ground pattern is laid on the second layout surface, the third layout surface and the fourth layout surface;

[0031] The grounding point is arranged on the second layout surface and connected to the grounding pattern;

[0032] The inner conductor of the coaxial line is connected to the feeding point, and the outer conductor is connected to the grounding point.

[0033] In a second aspect, an embodiment of the present invention further provides an electronic device, comprising:

[0034] According to the dual-band antenna described in the first aspect above.

[0035] The dual-frequency antenna and electronic device in this embodiment utilize a mounting portion to carry a waveguide component and utilize a coaxial cable to feed the antenna unit. Thus, on the one hand, the waveguide component is electrically connected to the protective shell to form a first electrical path and a second electrical path that are coupled to the first radiation pattern and the second radiation pattern, respectively. As a result, the signal gain of the antenna in a specific direction is improved, and the dual-frequency antenna can stably transmit and receive low-frequency signals and high-frequency signals, reducing mutual interference. On the other hand, the protective shell is utilized to increase the path length of the first electrical path and the second electrical path, so that the superimposed electromagnetic signal has a larger bandwidth, thereby improving the radiation performance of the dual-frequency antenna. On the other hand, the protective shell can be directly covered on the outside of the antenna unit to avoid opening metal breakpoints on the protective shell. This simplifies the manufacturing process of the dual-frequency antenna and reduces manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0037] Figure 1 This is a schematic structural diagram of a dual-band antenna according to an embodiment of the present invention;

[0038] Figure 2 1 is an exploded schematic diagram of a dual-band antenna according to an embodiment of the present invention;

[0039] Figure 3 This is a schematic structural diagram of one side of the antenna unit of an embodiment of the present utility model;

[0040] Figure 4 is a structural diagram of the other side of the antenna unit of an embodiment of the present utility model;

[0041] Figure 5 1 is a schematic structural diagram of a conductive pattern according to an embodiment of the present utility model;

[0042] Figure 6 It is a structural diagram of the installation portion of an embodiment of the utility model;

[0043] Figure 7 yes Figure 5 Schematic diagram of the structure of the conductive pattern in the direction indicated by arrow A;

[0044] Figure 8 1 is a schematic diagram of return loss simulation of the dual-band antenna according to some embodiments of the present invention;

[0045] Figure 9 Schematic diagram of return loss simulation of the dual-band antenna of the embodiment of the utility model in other implementations

[0046] Figure 101 is a schematic diagram of return loss simulation of the dual-band antenna of the embodiment of the present utility model in some other implementations;

[0047] Figure 11 1 is a schematic diagram of return loss simulation of the dual-band antenna of the embodiment of the present utility model in some further implementations.

[0048] Description of reference numerals:

[0049] 1-antenna unit;

[0050] 11-waveguide component; 111-main radiation pattern; 112-feeding point; 113-grounding point; 114-connection portion; 115-first radiation pattern; 1151-first dipole arm;

[0051] 116 - second radiation pattern; 1161 - second dipole arm;

[0052] 117 - ground pattern; 118 - first central region; 119 - second central region;

[0053] 12-mounting portion; 121-first section; 122-second section; 123-mounting groove; 124-second through hole; 125-first recessed area; 126-second recessed area;

[0054] 2-Protective shell;

[0055] 21- positioning slot;

[0056] 22-frame; 221-first stop bar; 222-second stop bar;

[0057] 23- first plate;

[0058] 24-positioning column; 241-threaded hole;

[0059] 25- second plate;

[0060] 31 - first electrical contact area; 32 - second electrical contact area; 33 - third electrical contact area; 331 - first through hole;

[0061] 41-first branch; 42-second branch;

[0062] 5-RF switch;

[0063] 61-first layout surface; 62-second layout surface; 63-third layout surface; 64-fourth layout surface;

[0064] 7-Metal screws;

[0065] 8-Coaxial cable. DETAILED DESCRIPTION

[0066] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. Certain specific details are described in detail in the detailed description of the present invention below. Those skilled in the art will be able to fully understand the present invention without these details. To avoid obscuring the essence of the present invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0067] Furthermore, persons of ordinary skill in the art will appreciate that the figures provided herein are for illustration purposes only and are not necessarily drawn to scale.

[0068] Unless the context clearly requires otherwise, words like “include”, “comprising” and the like throughout this application should be interpreted as including rather than exclusive or exhaustive; that is, as meaning “including but not limited to”.

[0069] In the description of the present invention, it should be understood that the terms "first," "second," etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0070] Unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0071] For ease of explanation, spatially relative terms such as "in," "out," "under," "below," "lower," "above," "upper," and the like are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as being "under" or "beneath" another element or feature would then be positioned "above" the other element or feature. Thus, the example term "under" can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0072] Figure 1 2 is a schematic structural diagram of the dual-frequency antenna of this embodiment. Figure 2 FIG. 4 is an exploded diagram of the dual-band antenna of this embodiment.

[0073] In some embodiments, as Figure 1-Figure 2 As shown, the dual-band antenna in this embodiment includes a protective shell 2 and an antenna unit 1 disposed inside the protective shell 2. The protective shell 2 has a positioning groove 21, and the antenna unit 1 is fixedly disposed in the positioning groove 21. At the same time, the antenna unit 1 is electrically connected to the protective shell 2.

[0074] Alternatively, the dual-band antenna in this embodiment can be applied to electronic devices such as laptop computers, mobile phones, or smartwatches. Specifically, the protective case 2 can be used to form the outer shell of a laptop computer, a mobile phone, or a smartwatch. Taking a laptop computer as an example, in this embodiment, the protective case 2 forms the main housing of the laptop computer. The upper second plate 25 in the figure represents the D-shell of the laptop computer, or the lower cover of the main body. The lower first plate 23 forms the C-shell, or the upper cover of the main body, surrounding the keyboard.

[0075] Figure 3 and Figure 4 1 and 2 are schematic structural diagrams of the antenna unit 1 of this embodiment. In both figures, the outline of the waveguide component 11 is shown with a thick solid line, and a part of the protective shell 2 is shown with a thin dotted line. Figure 3 The middle arrow indicates the flow direction of the low-frequency signal on the waveguide component 11. The arrow with a dotted tail indicates the flow direction of the current on the second radiation pattern 116, and the arrow with a solid tail indicates the flow direction of the current on the second electrical path. Figure 4 The arrow in the middle shows the direction of flow of the high-frequency signal on the waveguide component 11. The arrow with a dotted tail shows the direction of flow of the current on the first radiation pattern 115, and the arrow with a solid tail shows the direction of flow of the current on the first electrical path.

[0076] Figure 5 Schematic diagram of the structure of the conductive pattern of this embodiment. Figure 6 1 is a schematic structural diagram of the mounting portion 12 of this embodiment. The conductive pattern in this embodiment can be formed on the outer surface of the mounting portion 12 by laser direct structuring (LDS), electroplating, or chemical plating.

[0077] In some embodiments, as Figure 2-Figure 5 As shown, the antenna unit 1 includes a mounting portion 12 and a waveguide component 11 disposed on the mounting portion 12. The main radiation pattern 111 includes a first radiation pattern 115 and a second radiation pattern 116. The waveguide component 11 includes the main radiation pattern 111, a feeding point 112, a grounding point 113 and a connecting portion 114. The waveguide component 11 is electrically connected to the protective shell 2 through the connecting portion 114 and forms a first electrical path (such as Figure 4 as shown) and a second electrical path (as Figure 3The first radiation pattern 115 is coupled to the first electrical path, and the second radiation pattern 116 is coupled to the second electrical path. The dual-band antenna further includes a coaxial line 8 electrically connected to the antenna unit 1.

[0078] At the same time, the electromagnetic signal fed from the coaxial line 8 into the waveguide component 11 is superimposed on the first radiation pattern 115 through the first electrical path to form a high-frequency signal, and the electromagnetic signal is superimposed on the second radiation pattern 116 through the second electrical path to form a low-frequency signal.

[0079] Specifically, the electromagnetic signal of the feeding point 112 is transmitted to the grounding point 113 through the first electrical path and the second electrical path respectively, and the electromagnetic signal is superimposed on the first radiation pattern 115 through the first electrical path to form a high-frequency signal, and the electromagnetic signal is superimposed on the second radiation pattern 116 through the second electrical path to form a low-frequency signal.

[0080] Specifically, the protective shell 2 is positioned over the outside of the antenna unit 1 and is coupled to the waveguide component 11 of the antenna unit 1. The protective shell 2 is a one-piece structure with no metal breakpoints. The first radiation pattern 115 and the second radiation pattern 116 are spaced apart and face the same side of the inner wall of the protective shell 2. In the arrangement direction of the first and second radiation patterns 115, 116, the feeding point 112 is located between the first and second radiation patterns 115, 116, facilitating simultaneous feeding of the first and second radiation patterns 115, 116.

[0081] It is easy to understand that the first electrical path, the second electrical path, the first radiation pattern 115, and the second radiation pattern 116 in this embodiment all generate electromagnetic signals under the excitation of the feed point 112. The electromagnetic waves generated by the first radiation pattern 115 will be superimposed on the electromagnetic waves of the first electrical path, generating a high-frequency signal that radiates toward the outside of the protective shell 2. The electromagnetic waves generated by the second radiation pattern 116 will be superimposed on the electromagnetic waves of the second electrical path, generating a low-frequency signal that radiates toward the outside of the protective shell 2. The first electrical path and the second electrical path can be equivalent to a first loop antenna and a second loop antenna, respectively. The first loop antenna and the first radiation pattern 115 form a high-frequency antenna component, and the second loop antenna and the second radiation pattern 116 form a low-frequency antenna component. As a result, the dual-band antenna has dual-band communication capabilities and improves the antenna gain. In addition, by using the protective shell 2 to increase the flow path length of the current on the first electrical path and the second electrical path, the first electrical path and the second electrical path can respectively expand the bandwidth of the low-frequency signal and the high-frequency signal, thereby improving the radiation performance of the dual-band antenna.

[0082] In summary, the dual-frequency antenna in this embodiment uses the mounting portion 12 to carry the waveguide component 11, and uses the positioning groove 21 to fix the antenna unit 1. Therefore, on the one hand, the waveguide component 11 is electrically connected to the protective shell 2 to form a first electrical path and a second electrical path that are coupled to the first radiation pattern 115 and the second radiation pattern 116, respectively. As a result, the signal gain of the antenna in a specific direction is improved, and the dual-frequency antenna can stably transmit and receive low-frequency signals and high-frequency signals, reducing mutual interference. On the other hand, the protective shell 2 is used to increase the path length of the first electrical path and the second electrical path, so that the superimposed electromagnetic signal has a larger bandwidth, thereby improving the radiation performance of the dual-frequency antenna. On the other hand, the protective shell 2 can be directly covered on the outside of the antenna unit 1 to avoid opening metal breakpoints on the protective shell 2. This simplifies the manufacturing process of the dual-frequency antenna and reduces manufacturing costs.

[0083] In some embodiments, as Figure 3 As shown, the connecting portion 114 includes a first electrical contact area 31 and a second electrical contact area 32 spaced apart from each other. The protective housing 2 includes a frame 22, which surrounds a portion of the antenna unit 1 and abuts against the first electrical contact area 31 and the second electrical contact area. The frame 22 between the first electrical contact area 31 and the second electrical contact area 32 forms a portion of the second electrical path.

[0084] The frame 22 in this embodiment is attached to the side of the antenna unit 1 to provide structural strength to the protective housing 2 and protect the antenna unit 1. Furthermore, the frame 22 and the spaced-apart first and second electrical contact areas 31, 32 can further increase the length of the second electrical path, shifting the electromagnetic signal radiated by the second electrical path toward lower frequencies, thereby broadening the bandwidth of the superimposed low-frequency signal.

[0085] In some embodiments, as Figure 3 As shown, the frame 22 includes a first bar 221 and a second bar 222, which are vertically connected. The first electrical contact area 31 and the second electrical contact area 32 abut against the first bar 221 and the second bar 222, respectively, and the main radiation pattern 111 corresponds to the first bar 221.

[0086] Specifically, the first electrical contact area 31 is positioned relative to the first radiating pattern 115 and closer to the second baffle 222. The antenna unit 1 in this embodiment can be positioned in a corner of the lower cover of a laptop computer, minimizing interference between the antenna unit 1 and other electronic components of the laptop computer and fully utilizing this area to increase the length of the second electrical path. Furthermore, the primary radiating pattern 111 is positioned in alignment with the first baffle 221 and staggered with the second baffle 222, enhancing the directivity of the electromagnetic signal.

[0087] In some embodiments, as Figure 3 and Figure 6As shown, the mounting portion 12 is L-shaped and includes a first section 121 and a second section 122 in the extending direction, and the first section 121 and the second section 122 are respectively arranged corresponding to the first stop bar 221 and the second stop bar 222. Thus, the L-shaped mounting portion 12 can free up more internal space for the laptop.

[0088] Further reference Figure 5 As shown, the waveguide component 11 includes a conductive pattern. The conductive pattern includes a main radiation pattern 111, a first branch 41, and a ground pattern 117. The main radiation pattern 111, the feed point 112, and the ground point 113 are arranged on the surface of the first section 121. The first branch 41 is arranged on the second section 122. One end of the first branch 41 is electrically connected to the ground point 113 via the ground pattern 117, and the other end of the first branch 41 extends toward the first blocking bar 221 to form the second electrical contact area 32. In this embodiment, the ground pattern 117 and the first branch 41 are used to allow the electromagnetic signal to flow back to the ground point 113, further increasing the length of the second electrical path.

[0089] In some embodiments, as Figure 3 As shown, the second section 122 defines a mounting groove 123 . The waveguide component 11 further includes a radio frequency switch 5 , which is disposed in the mounting groove 123 and has multiple conduction states. The radio frequency switch 5 is connected between the first branch 41 and the ground pattern 117 .

[0090] Specifically, the RF switch 5 in this embodiment has different conduction states, each conduction state can correspond to a different path, and each path can be set with corresponding inductance and capacitance, so that when different paths are turned on, the RF switch 5 can produce different inductance or capacitance characteristics.

[0091] Thus, the RF switch 5 is configured to finely adjust the frequency range of the low-frequency signal by switching between different conduction states to meet the operating requirements of the antenna unit 1. Furthermore, locating the RF switch 5 away from the first radiation pattern 115 can reduce the impact of frequency changes of the low-frequency signal on the high-frequency signal.

[0092] In some embodiments, as Figure 6 As shown, the mounting portion 12 includes a first layout surface 61, a second layout surface 62, and a third layout surface 63. The first layout surface 61 and the third layout surface 63 face away from each other, and the second layout surface 62 is located between the first layout surface 61 and the third layout surface 63. The main radiation pattern 111 is arranged on the second layout surface 62, the first electrical contact area 31 and the second electrical contact area 32 are arranged on the first layout surface 61, and at least a portion of the ground pattern 117 is arranged on the third layout surface 63. As a result, this embodiment maximizes the use of the space in the mounting portion 12 and increases the length of the second electrical path.

[0093] Specifically, the second layout surface 62 includes a first layout area and a second layout area. The second layout area is arranged horizontally, and the first layout area is arranged at an angle and connected between the second layout area and the first layout surface 61. The first layout surface 61 is arranged toward the frame 22. The first radiation pattern 115 is located in the first layout area, and the second radiation pattern 116 is located in both the first layout area and the second layout area. As a result, the first layout surface 61 can match the structure of the lower cover of the laptop computer, making the structure within the computer more compact.

[0094] Figure 7 yes Figure 5 Schematic diagram of the structure of the conductive pattern in the direction indicated by arrow A.

[0095] In some embodiments, as Figure 7 As shown, the length of the first branch 41 is L1. In the extension direction of the frame 22, the length of the frame 22 between the first electrical contact area 31 and the second electrical contact area 32 is L2 (i.e., the sum of the distance L21 and the distance L22), and the length of the ground pattern 117 is L3 (i.e., the sum of the distance L31 and the distance L32).

[0096] The length L of the second electrical path is configured to be equal to (1 / 2) × λ2. Here, L = L1 + L2 + L3, and λ2 is the wavelength of the low-frequency signal. In other words, the length of the second electrical path is half the wavelength of the low-frequency signal. Thus, the second electrical path formed by the first branch 41, the ground pattern 117, and the frame 22 can cooperate with the second radiating pattern 116 to generate a low-frequency signal.

[0097] In some embodiments, as Figure 3 As shown, the conductive pattern further includes a second branch 42. One end of the second branch 42 is electrically connected to the second radiating pattern 116, and the other end extends toward the first radiating pattern 115 and is electrically connected to the feed point 112 and the first radiating pattern 115, and the first electrical contact region 31 extends from the second branch 42 toward the first blocking bar 221.

[0098] Specifically, the first electrical contact region 31 is close to the end of the second branch 42 away from the first radiation pattern 115, and the end of the second branch 42 away from the first radiation pattern 115 is connected to the second radiation pattern 116, while the second radiation pattern 116 extends toward the first radiation pattern 115. The second branch 42 is used to conduct electromagnetic signals to the first electrical contact region 31 and the first radiation pattern 115 respectively, and to maintain a predetermined distance between the first radiation pattern 115 and the second radiation pattern 116, thereby ensuring isolation between the first radiation pattern 115 and the second radiation pattern 116.

[0099] In some embodiments, as Figure 2As shown, the protective shell 2 further includes a first plate 23, the first plate 23 is fixedly connected to the frame 22 and forms a positioning groove 21. Figure 3 As shown, the connecting portion 114 further includes a third electrical contact area 33 . The third electrical contact area 33 , the first blocking bar 221 and the first plate 23 form a portion of the first electrical path.

[0100] Specifically, the frame 22 extends along the edge of the first plate 23, and the mounting portion 12 is fixed to the surface of the first plate 23. The first plate 23 can be used to secure the laptop keyboard. In this embodiment, the first plate 23 is electrically connected to the frame 22 to conduct electromagnetic signals, thereby increasing the length of the first electrical path.

[0101] In some embodiments, as Figure 2 As shown, the antenna unit 1 also includes a metal screw 7. Figure 6-Figure 7 As shown, the third electrical contact area 33 defines a first through hole 331, and the mounting portion 12 defines a second through hole 124. Figure 2 As shown, the protective housing 2 further includes a positioning post 24 fixedly connected to the frame 22, and the positioning post 24 defines a threaded hole 241. A metal screw 7 passes through the first through-hole 331 and the second through-hole 124 and is threadedly engaged with the threaded hole 241. The top surface of the positioning post 24 abuts the mounting portion 12, and the third electrical contact area 33 is electrically connected to the frame 22 via the metal screw 7. In this embodiment, the metal screw 7 is used to secure the antenna unit 1 to the protective housing 2 and simultaneously electrically connect the waveguide component 11 to the frame 22.

[0102] Preferably, a first recessed area 125 is provided at the edge of the second layout surface 62, and the first recessed area 125 is recessed from the second layout surface 62 to the fourth layout surface 64. The third electrical contact area 33 is arranged in the first recessed area 125. A second recessed area 126 is provided at the edge of the fourth layout surface 64. The second recessed area 126 is recessed toward the second layout surface 62. The positioning column 24 extends into the second recessed area 126 and abuts against the bottom of the second recessed area 126. In this way, the head of the metal screw 7 is in electrical contact with the third electrical contact area 33, and the tail of the metal screw 7 is extended into the threaded hole 241. The length of the metal screw 7 is thereby reduced, making the structure of the antenna unit 1 more compact.

[0103] In some embodiments, as Figure 4-Figure 6 As shown, the waveguide component 11 includes a conductive pattern, which includes a main radiation pattern 111 and a ground pattern 117. The mounting portion 12 includes a second layout surface 62 and a fourth layout surface 64, the second layout surface 62 and the fourth layout surface 64 facing away from each other. The main radiation pattern 111 is arranged on the second layout surface 62, and a portion of the ground pattern 117 is arranged on the fourth layout surface 64 and abuts against the first plate 23.

[0104] When the antenna unit 1 is mounted on the first board 23, the fourth layout surface 64 will abut against the first board 23. In this form, the antenna unit 1 can be electrically connected to the first board 23 by using the ground pattern 117 arranged on the fourth layout surface 64, so that the first electrical path is conductive.

[0105] In some embodiments, as Figure 3-Figure 6 As shown, the mounting portion 12 further includes a third layout surface 63, which is located between the second layout surface 62 and the fourth layout surface 64. A ground pattern 117 is arranged on the second layout surface 62, the third layout surface 63, and the fourth layout surface 64. A ground point 113 is arranged on the second layout surface 62 and connected to the ground pattern 117. The dual-band antenna also includes a coaxial line 8. The inner conductor (i.e., the core) of the coaxial line 8 is connected to the feed point 112, and the outer conductor (i.e., the metal braid) is connected to the ground point 113.

[0106] The core of the coaxial line 8 in this embodiment is used to feed the antenna unit 1 and provide grounding for the antenna unit 1 through the metal braided layer, so that the first electrical path and the second electrical path are connected through the feeding point 112 and the grounding point 113 .

[0107] Specifically, if Figure 4-Figure 5 As shown, the ground pattern 117 extends in an L-shape and includes a center piece and two flanges. The center piece covers the entire third layout surface 63, and the two flanges are arranged at the edges of the second layout surface 62 and the fourth layout surface 64, respectively. The flange on the second layout surface 62 is connected to the ground point 113, which is connected to the coaxial line 8 and acts as a choke. The flange on the fourth layout surface 64 abuts the first plate 23 to form a portion of the first electrical path.

[0108] Preferably, if Figure 7 As shown, the first radiation pattern 115 includes a first dipole arm 1151, which is connected end to end and surrounds a first central region 118. The second radiation pattern 116 has two second dipole arms 1161, which extend toward the first radiation pattern 115. The two second dipole arms 1161 form two second central regions 119 on opposite sides of the two second dipole arms 1161. The second branch 42 is connected to the ends of the two second dipole arms 1161 away from the first radiation pattern 115. No metal layer is provided in the first central region 118 and the second central region 119 to adjust the impedance of the first radiation pattern 115 and the second radiation pattern 116. At the same time, the current fed into the connecting portion 114 and the second radiation pattern 116 can be conducted along a predetermined direction to overlap with the electromagnetic signals of the first loop antenna and the second loop antenna, respectively.

[0109] In some embodiments, as Figure 2As shown, the protective housing 2 includes a first plate 23, a frame 22, and a second plate 25. The second plate 25 is connected to the first plate 23 via the frame 22. The second plate 25 covers the main radiation pattern 111. This places the antenna unit 1 within a closed metal cavity, avoiding metal breakpoints in the protective housing 2.

[0110] Preferably, the positioning groove 21 is an L-shaped groove that matches the mounting portion 12. The L-shaped groove has a length of 182 mm and a width of 20 mm in the extension direction close to the frame 22 (e.g. Figure 2 The middle distance L4 is shown).

[0111] Figure 8 、 Figure 9 、 Figure 10 and Figure 11 FIG. 4 is a schematic diagram of return loss simulation of the dual-band antenna of this embodiment. Figures 8-10 The dotted box on the left side of the figure is the operating frequency band of the low-frequency signal, and the dotted box on the right side is the operating frequency band of the high-frequency signal.

[0112] In some embodiments, as Figure 3 As shown, the multiple conduction states of the RF switch 5 include a first conduction state, a second conduction state, a third conduction state, and a fourth conduction state. In the first conduction state, the RF switch 5 is in an off state. In the second conduction state, the inductance value of the conduction path of the RF switch 5 is 36nh (nanohenry). In the third conduction state, the capacitance value of the conduction path of the RF switch 5 is 3.6pF (picofarad). In the fourth conduction state, the capacitance value of the conduction path of the RF switch 5 is 0.75pF (picofarad).

[0113] When the RF switch 5 is in the first conducting state (eg Figure 8 As shown), the return loss of the high-frequency signal of the dual-frequency antenna is 1.452GHz-5.925GHz, and the return loss of the low-frequency signal is 617MHz-700MHz. When the RF switch 5 is in the second conduction state (as shown), the return loss of the high-frequency signal of the dual-frequency antenna is 1.452GHz-5.925GHz, and the return loss of the low-frequency signal is 617MHz-700MHz. Figure 9 As shown), the return loss of the high-frequency signal of the dual-frequency antenna is 1.452GHz-5.925GHz, and the return loss of the low-frequency signal is 700MHz-800MHz. When the RF switch 5 is in the third conduction state (as shown), the return loss of the high-frequency signal of the dual-frequency antenna is 1.452GHz-5.925GHz, and the return loss of the low-frequency signal is 700MHz-800MHz. Figure 10 As shown), the return loss of the high-frequency signal of the dual-frequency antenna is 1.452GHz-5.925GHz, and the return loss of the low-frequency signal is 800MHz-880MHz. When the RF switch 5 is in the fourth conduction state (as shown), the return loss of the high-frequency signal of the dual-frequency antenna is 1.452GHz-5.925GHz, and the return loss of the low-frequency signal is 800MHz-880MHz. Figure 11As shown in the figure, the return loss of the dual-band antenna for high-frequency signals is 1.452 GHz to 5.925 GHz, and the return loss for low-frequency signals is 880 MHz to 960 MHz. As can be seen, as the amount of electromagnetic signals conducted by RF switch 5 gradually increases, the return loss of the low-frequency antenna component gradually increases, resulting in better radiation performance for the second electrical path and second radiation pattern 116. Meanwhile, the return loss waveform of the high-frequency antenna component remains nearly unchanged, thus enabling the dual-band antenna to effectively meet the radiation performance requirements of wireless wide area networks.

[0114] In an optional implementation, the dual-band antenna in the above embodiment may be applied to electronic devices, including but not limited to laptop computers, mobile phones, smart watches, and the like.

[0115] In summary, the electronic device in this embodiment uses the mounting portion 12 to carry the waveguide component 11, and uses the positioning groove 21 to fix the antenna unit 1. Therefore, on the one hand, the waveguide component 11 is electrically connected to the protective shell 2 to form a first electrical path and a second electrical path that are coupled to the first radiation pattern 115 and the second radiation pattern 116, respectively. Thereby, the signal gain of the antenna in a specific direction is improved, and the dual-frequency antenna can stably transmit and receive low-frequency signals and high-frequency signals, reducing mutual interference. On the other hand, the protective shell 2 is used to increase the path length of the first electrical path and the second electrical path, so that the superimposed electromagnetic signal has a larger bandwidth, thereby improving the radiation performance of the dual-frequency antenna. On the other hand, the protective shell 2 can be directly covered on the outside of the antenna unit 1 to avoid opening metal breakpoints on the protective shell 2. This simplifies the manufacturing process of the dual-frequency antenna and reduces manufacturing costs.

[0116] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A dual-band antenna, characterized in that: The dual-frequency antenna includes: Coaxial cable (8); a protective shell (2); and An antenna unit (1) is electrically connected to the coaxial line (8) and includes a mounting portion (12) and a waveguide component (11) disposed on the mounting portion (12), wherein the waveguide component (11) includes a main radiation pattern (111) and a connecting portion (114), the protective shell (2) is disposed on the antenna unit (1) and is electrically connected to the waveguide component (11) via the connecting portion (114), the waveguide component (11) and the protective shell (2) form a first electrical path and a second electrical path, the main radiation pattern (111) includes a first radiation pattern (115) and a second radiation pattern (116) facing the inner wall of the protective shell (2), the first radiation pattern (115) is coupled to the first electrical path, and the second radiation pattern (116) is coupled to the second electrical path; The antenna unit (1) is configured to superimpose an electromagnetic signal fed from the coaxial line (8) into the waveguide component (11) with the first radiation pattern (115) through the first electrical path to form a high-frequency signal, and simultaneously superimpose the electromagnetic signal with the second radiation pattern (116) through the second electrical path to form a low-frequency signal.

2. The dual-band antenna according to claim 1, wherein: The waveguide component (11) further comprises a feeding point (112) and a grounding point (113), wherein the electromagnetic signal of the feeding point (112) is conducted to the grounding point (113) through the first electrical path and the second electrical path respectively; The connecting portion (114) includes a first electrical contact area (31) and a second electrical contact area (32) that are spaced apart. The protective shell (2) comprises a frame (22), the frame (22) being arranged around a portion of the antenna unit (1) and abutting against the first electrical contact area (31) and the second electrical contact area, the frame (22) between the first electrical contact area (31) and the second electrical contact area (32) forming a portion of the second electrical path.

3. The dual-band antenna according to claim 2, wherein: The frame (22) comprises a first blocking bar (221) and a second blocking bar (222), wherein the first blocking bar (221) and the second blocking bar (222) are vertically connected; The first electrical contact area (31) and the second electrical contact area (32) abut against the first blocking bar (221) and the second blocking bar (222) respectively, and the main radiation pattern (111) corresponds to the first blocking bar (221).

4. The dual-band antenna according to claim 3, wherein: The mounting portion (12) has an L-shaped structure and comprises a first section (121) and a second section (122) in the extension direction, and the first section (121) and the second section (122) are respectively arranged corresponding to the first blocking bar (221) and the second blocking bar (222); The waveguide component (11) includes a conductive pattern, which includes the main radiation pattern (111), a first branch (41) and a grounding pattern (117). The main radiation pattern (111), the feeding point (112) and the grounding point (113) are arranged on the surface of the first section (121). The first branch (41) is arranged in the second section (122), and one end of the first branch is electrically connected to the grounding point (113) through the grounding pattern (117), and the other end extends toward the first blocking bar (221) to form the second electrical contact area (32).

5. The dual-band antenna according to claim 4, characterized in that: The second section (122) is provided with a mounting groove (123); The waveguide component (11) further includes a radio frequency switch (5), which is arranged in the mounting groove (123) and has multiple conduction states, and the radio frequency switch (5) is connected between the first branch (41) and the ground pattern (117).

6. The dual-band antenna according to claim 4, characterized in that: The mounting portion (12) includes a first layout surface (61), a second layout surface (62) and a third layout surface (63), wherein the first layout surface (61) and the third layout surface (63) are opposite to each other, the second layout surface (62) is located between the first layout surface (61) and the third layout surface (63), the main radiation pattern (111) is arranged on the second layout surface (62), the first electrical contact area (31) and the second electrical contact area (32) are arranged on the first layout surface (61), and at least part of the ground pattern (117) is arranged on the third layout surface (63).

7. The dual-band antenna according to claim 6, wherein: The length of the first branch (41) is L1, the length of the frame (22) between the first electrical contact area (31) and the second electrical contact area (32) in the extension direction of the frame (22) is L2, and the length of the ground pattern (117) is L3; L=(1 / 2)×λ2, where L is the length of the second electrical path, L=L1+L2+L3, and λ2 is the wavelength of the low-frequency signal.

8. The dual-band antenna according to claim 4, wherein: The conductive pattern further includes a second branch (42), one end of the second branch (42) being electrically connected to the second radiation pattern (116), and the other end extending toward the first radiation pattern (115) and electrically connected to the feed point (112) and the first radiation pattern (115), and the first electrical contact area (31) extending from the second branch (42) toward the first blocking bar (221).

9. The dual-band antenna according to claim 3, wherein: The protective shell (2) further comprises a first plate (23), wherein the first plate (23) is fixedly connected to the frame (22) and forms a positioning groove (21) for accommodating the antenna unit (1); The connecting portion (114) further includes a third electrical contact area (33); the third electrical contact area (33), the first blocking bar (221) and the first plate (23) form part of the first electrical path.

10. The dual-band antenna according to claim 9, characterized in that: The antenna unit (1) further comprises a metal screw (7); The third electrical contact area (33) defines a first through hole (331), and the mounting portion (12) defines a second through hole (124); The protective shell (2) further comprises a positioning column (24) fixedly connected to the frame (22), and the positioning column (24) is provided with a threaded hole (241); The metal screw (7) passes through the first through hole (331) and the second through hole (124) and is screwed to the threaded hole (241), and the table surface of the positioning column (24) abuts against the mounting portion (12), while the third electrical contact area (33) is electrically connected to the frame (22) through the metal screw (7).

11. The dual-band antenna according to claim 9, wherein: The waveguide component (11) includes a conductive pattern, and the conductive pattern includes the main radiation pattern (111) and a ground pattern (117); The mounting portion (12) includes a second layout surface (62) and a fourth layout surface (64), the second layout surface (62) and the fourth layout surface (64) are opposite to each other, the main radiation pattern (111) is arranged on the second layout surface (62), and part of the ground pattern (117) is arranged on the fourth layout surface (64) and abuts against the first plate (23).

12. The dual-band antenna according to claim 11, wherein: The mounting portion (12) further includes a third layout surface (63), the third layout surface (63) being located between the second layout surface (62) and the fourth layout surface (64), and the ground pattern (117) being arranged on the second layout surface (62), the third layout surface (63), and the fourth layout surface (64); The grounding point (113) is arranged on the second arrangement surface (62) and connected to the grounding pattern (117); The inner conductor of the coaxial line (8) is connected to the feeding point (112), and the outer conductor is connected to the grounding point (113).

13. An electronic device, characterized in that: The electronic device comprises: The dual-band antenna according to any one of claims 1 to 12.

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