An antenna structure and electronic device

Abstract

Embodiments of the present application provide an antenna structure and an electronic device. The antenna structure comprises a radiator, a second radiator, a transmission line, a feed point and a ground point. The first end of the transmission line is electrically connected with the feed point, the second end of the transmission line is electrically connected with the first radiator and the second radiator respectively, and the first radiator is electrically connected with the ground point. The impedance of the first radiator in a first state and the impedance of the second radiator in a second state are conjugate. The first state is that the transmission line delivers electromagnetic energy to the first radiator alone, and the second state is that the transmission line delivers electromagnetic energy to the second radiator alone. When the transmission line feeds the first radiator and the second radiator at the same time, the load impedance of the first radiator and the second radiator can be adapted to each other, the modes of the first radiator and the second radiator can be fused with each other, the radiation bandwidth of the electromagnetic wave signal can be effectively increased, the radiation intensity of the antenna structure in a wide frequency band can be effectively increased, and the reliability of the communication of the electronic device can be improved.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to an antenna structure and electronic device. Background Technology

[0002] An antenna is a device that performs energy conversion and directional radiation or reception of electromagnetic waves in wireless communication. It is widely used in engineering systems such as radio communication, broadcasting, radar, navigation, and remote sensing. For example, antennas are used in electronic devices such as mobile phones, laptops, tablets, netbooks, and wearable devices, enabling signal transmission.

[0003] Taking the application of antennas in mobile phones as an example, currently, most mobile phones use a metal frame or a decorative camera module on the back cover as an antenna to transmit and receive signals. However, this method results in a small antenna coverage area, low antenna system efficiency, and narrow bandwidth, reducing the reliability of electronic device communication. Summary of the Invention

[0004] This application provides an antenna structure and electronic device to solve the problems of small antenna coverage, low antenna system efficiency, and narrow bandwidth in existing electronic devices.

[0005] The first aspect of this application provides an antenna structure, characterized in that it includes: a first radiator, a second radiator, a transmission line, a feed point, and a ground point;

[0006] The first end of the transmission line is electrically connected to the feed point, and the second end of the transmission line is electrically connected to the first radiator and the second radiator respectively. The first radiator is electrically connected to the grounding point.

[0007] Furthermore, the first radiator in the first state and the second radiator in the second state are impedance conjugates, where the first state is when the transmission line alone transmits electromagnetic energy to the first radiator, and the second state is when the transmission line alone transmits electromagnetic energy to the second radiator.

[0008] This application electrically connects a first radiator and a second radiator via a transmission line, and makes the impedance of the first radiator in its single-pass state conjugate with the impedance of the second radiator in its single-pass state. Thus, when the transmission line simultaneously supplies electromagnetic energy to both the first and second radiators, the electromagnetic wave signal is radiated outward through both radiators. At this time, the load impedances of the first and second radiators can be matched, allowing their modes to merge, effectively increasing the radiation bandwidth of the electromagnetic wave signal. This, in turn, effectively increases the radiation intensity of the antenna structure over a wide frequency band, improving the reliability and stability of electronic device communication.

[0009] Furthermore, by simultaneously transmitting and receiving signals through the first and second radiators, the signal strength and coverage of the antenna structure can be effectively increased, allowing the antenna structure to transmit and receive electromagnetic wave signals from multiple directions, thereby effectively improving the reliability of electronic device communication.

[0010] In one possible implementation, the method further includes: two matching circuits; one end of one of the matching circuits is electrically connected to the second end of the transmission line, and the other end is electrically connected to the first radiator; one end of the other matching circuit is electrically connected to the second end of the transmission line, and the other end is electrically connected to the second radiator. The matching circuits can adjust the impedance of the first and second radiators, enabling their impedances to be conjugate in a single-pass state. This allows the load impedances of the first and second radiators to be matched when they operate simultaneously, and allows their emission modes to be integrated, thereby effectively increasing the radiation bandwidth of the electromagnetic wave signal and increasing the radiation intensity of the antenna structure over a wide frequency band.

[0011] In one possible implementation, each of the matching circuits includes: a first circuit comprising at least one of a first capacitor and a first inductor; and when the first circuit comprises the first inductor and the first capacitor, the first inductor and the first capacitor are connected in series; one end of the first circuit is electrically connected to a second end of the transmission line, and the other end of the first circuit is electrically connected to either the first radiator or the second radiator. The first inductor and the first capacitor in the two sets of first circuits can respectively adjust the imaginary parts of the impedances of the first radiator and the second radiator so that the impedances of the first radiator and the second radiator in a single-pass state can be conjugate, thereby allowing the first radiator and the second radiator to be mutually matched when operating simultaneously.

[0012] In one possible implementation, each of the matching circuits further includes a second circuit comprising at least one of a second capacitor and a second inductor; and when the second circuit comprises the second inductor and the second capacitor, the second inductor and the second capacitor are connected in series; one end of the second circuit is electrically connected to the first circuit, and the other end of the second circuit is grounded. The second inductor and the second capacitor can serve as impedance matching between the second circuit and the metal intermediate plate, thereby improving the transmission efficiency of electromagnetic wave signals between the second circuit and the metal intermediate plate.

[0013] In one possible implementation, the transmission line includes: a trunk line, a first branch line, and a second branch line; the feed point is electrically connected to a first end of the trunk line; one end of the first branch line is electrically connected to a second end of the trunk line, and the other end of the first branch line is electrically connected to a first radiator; one end of the second branch line is electrically connected to a second end of the trunk line, and the other end of the second branch line is electrically connected to a second radiator, and the first branch line and the second branch line are spaced apart along the length of the trunk line; two matching circuits are respectively connected in series on the first branch line and the second branch line.

[0014] In one possible implementation, a connecting post is further included, one end of which is electrically connected to the first radiator and the other end of which is electrically connected to a second end of the transmission line, so that the first radiator is electrically connected to the second end of the transmission line through the connecting post.

[0015] In one possible implementation, at least one grounding post is also included, one end of which is electrically connected to the first radiator and the other end of which is electrically connected to the grounding point.

[0016] In one possible implementation, the number of grounding posts is two, namely a first grounding post and a second grounding post, and the number of grounding points is two;

[0017] One end of the first grounding post and the second grounding post are electrically connected to the first radiator, and the other end of the first grounding post and the second grounding post are electrically connected to the two grounding points respectively.

[0018] In one possible implementation, the line connecting the two grounding posts passes through the center of the first radiator and is perpendicular to the line connecting the connection point of the first radiator and the transmission line to the center of the first radiator.

[0019] In one possible implementation, the first radiator is a ring-shaped structure;

[0020] The second radiator has a strip-shaped structure.

[0021] A second aspect of this application provides an electronic device, comprising: a mid-frame, a display screen, a rear cover, and an antenna structure as described above; the mid-frame is located between the display screen and the rear cover, a first radiator of the antenna structure is located on the rear cover or between the mid-frame and the rear cover, and a second radiator of the antenna structure is located on the mid-frame.

[0022] By incorporating the aforementioned antenna structure into electronic devices, the reliability and stability of electronic device communication can be effectively improved.

[0023] In one possible implementation, the mid-frame includes a metal frame, at least a portion of which forms a second radiator of the antenna structure.

[0024] In one possible implementation, the mid-frame further includes a metal mid-plate connected to the metal frame, and the grounding point of the antenna structure is electrically connected to the metal mid-plate.

[0025] In one possible implementation, the back cover is provided with a camera trim piece, which is a metal piece and forms the first radiator of the antenna structure. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0027] Figure 2 An exploded view of an electronic device provided in an embodiment of this application;

[0028] Figure 3 A front view of a first antenna structure provided in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the first antenna structure provided in the embodiments of this application;

[0030] Figure 5 This is a schematic diagram of the second antenna structure provided in the embodiments of this application;

[0031] Figure 6 A schematic diagram of a structure in which two grounding posts are disposed on a first radiator, as provided in an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of a matching circuit disposed in an antenna structure according to an embodiment of this application;

[0033] Figure 8 A schematic diagram of a matching circuit provided in an embodiment of this application;

[0034] Figure 9 This is a schematic diagram of another matching circuit provided in an embodiment of this application;

[0035] Figure 10 This application provides a schematic diagram of the structure of a transmission line according to an embodiment of the present application.

[0036] Figure 11 A front view of a first radiator provided in an embodiment of this application;

[0037] Figure 12A top view of a first radiator provided in an embodiment of this application;

[0038] Figure 13 This is a schematic diagram of the structure of a second radiator provided in an embodiment of this application;

[0039] Figure 14 A schematic diagram of the dimensions of a transmission line provided in an embodiment of this application;

[0040] Figure 15 This is a schematic diagram of the structure of a connecting column provided in an embodiment of this application;

[0041] Figure 16 Return loss diagram of the first antenna structure provided in the embodiments of this application;

[0042] Figure 17 A radiation efficiency diagram of the first antenna structure provided in the embodiments of this application;

[0043] Figure 18 Return loss diagram of the second antenna structure provided in the embodiments of this application;

[0044] Figure 19 A radiation efficiency diagram of the second antenna structure provided in the embodiments of this application;

[0045] Figure 20 Smith chart of the first radiator in single-pass state provided in the embodiments of this application;

[0046] Figure 21 Smith chart of the second radiator in single-pass state provided in the embodiments of this application.

[0047] Explanation of reference numerals in the attached figures:

[0048] 100 - Electronic devices;

[0049] 110 - Mid-frame; 111 - Metal frame; 112 - Metal mid-plate;

[0050] 120 - Display screen;

[0051] 130 - Back cover; 131 - Camera trim piece;

[0052] 200-antenna structure;

[0053] 210 - First radiator;

[0054] 220 - Second radiator;

[0055] 230 - Transmission line; 231 - Main trunk line; 232 - First branch line; 233 - Second branch line;

[0056] 240 - Feed point;

[0057] 250 - Grounding point;

[0058] 260, 260a, 260b - Matching circuit;

[0059] 261, 261a, 261b - First circuit;

[0060] 2611, 2611a, 2611b - First inductor; 2612, 2612a, 2612b - First capacitor;

[0061] 262, 262a, 262b - Second circuit;

[0062] 2621, 2621a, 2621b - Second inductors; 2622, 2622a, 2622b - Second capacitors;

[0063] 270 - Connecting post;

[0064] 280 - Grounding post; 281 - First grounding post; 282 - Second grounding post. Detailed Implementation

[0065] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0066] This application provides an antenna structure and an electronic device including the antenna structure. The electronic device can be a mobile phone, tablet computer, laptop computer, ultra-mobile personal computer (UMPC), handheld computer, walkie-talkie, netbook, POS machine, personal digital assistant (PDA), wearable device, virtual reality device, vehicle-mounted device, or other electronic devices with antennas.

[0067] In this embodiment of the application, a mobile phone is taken as an example. The mobile phone can be a candybar phone or a foldable phone. Specifically, the following description will use a candybar phone as an example.

[0068] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 2 This is an exploded view of an electronic device provided in an embodiment of this application.

[0069] See Figure 1 and Figure 2As shown, the electronic device 100 may include a mid-frame 110, a display screen 120, and a back cover 130. The mid-frame 110 may be located between the display screen 120 and the back cover 130. For example, the display screen 120 and the back cover 130 may be respectively disposed on opposite sides of the mid-frame 110. The mid-frame 110 may be used to support and carry the display screen 120, which may be used to display images, such as status information, battery information, time, video, pictures, and text messages of the electronic device 100. The back cover 130 may enclose the internal components of the electronic device 100, making the electronic device 100 a single unit.

[0070] A camera decorative element 131 can also be provided on the back cover 130 of the electronic device 100. The camera decorative element 131 can be used to decorate the camera and improve its overall aesthetics. The mid-frame 110 of the electronic device 100 may include a metal frame 111. In related technologies, the camera decorative element is often used as a separate antenna for the electronic device to transmit and receive signals. Alternatively, the metal frame can be used as a separate antenna for signal transmission and reception. However, the coverage area of ​​these antennas is relatively small, reducing their radiation efficiency and thus affecting the reliability and stability of the electronic device's communication.

[0071] Based on the above problems, researchers devised an improvement to the antenna structure. By including a first radiator and a second radiator in the antenna structure, and making the impedances of the first and second radiators conjugate when they operate individually, the load impedances of the two radiators can be matched when they operate simultaneously. This allows the transmission or reception modes of the two radiators to be integrated, thereby increasing the radiation bandwidth of the electromagnetic wave signal, increasing the radiation intensity of the antenna structure in a wide frequency band, and effectively improving the reliability and stability of electronic device communication.

[0072] The antenna structure provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0073] Figure 3 This is a front view of the first antenna structure provided in the embodiments of this application. Figure 4 This is a schematic diagram of the first antenna structure provided in the embodiments of this application.

[0074] See Figure 3 and Figure 4As shown in the illustration, an antenna structure 200 provided in this application embodiment may include a first radiator 210, a second radiator 220, a transmission line 230, a feed point 240, and a ground point 250. A first end of the transmission line 230 may be electrically connected to the feed point 240, and a second end of the transmission line 230 may be electrically connected to both the first radiator 210 and the second radiator 220. It should be noted that the second end of the transmission line 230 should not be narrowly interpreted as necessarily being a single point; it can also be considered as a segment of the transmission line 230 including that endpoint.

[0075] Feed point 240 can supply power or power input to transmission line 230, so that electromagnetic energy at feed point 240 can be transmitted through transmission line 230 to first radiator 210 and second radiator 220 respectively, and radiate electromagnetic wave signals outward through first radiator 210 and second radiator 220 respectively. For example, feed point 240 can be electrically connected to radio frequency unit (not shown in the figure) in electronic device 100. Electromagnetic energy emitted by radio frequency unit can be transmitted to feed point 240, and then transmitted through feed point 240 to first radiator 210 and second radiator 220.

[0076] For example, the first radiator 210 can be located on the back cover 130 of the electronic device 100, or it can be located between the middle frame 110 and the back cover 130 of the electronic device 100. For example, the camera trim 131 of the electronic device 100 can be made of metal, in which case the camera trim 131 can form the first radiator 210. Alternatively, when the camera trim 131 is non-metallic, a metal structure can be provided between the back cover 130 and the middle frame 110 so that the metal structure can form the first radiator 210.

[0077] The second radiator 220 can be located on the mid-frame 110 of the electronic device 100. For example, the mid-frame 110 of the electronic device 100 can include a metal frame 111, at least a portion of which can form the second radiator 220 of the antenna structure 200. Alternatively, when the mid-frame 110 of the electronic device 100 is a non-metallic structure, a metal structural member can be provided on the mid-frame 110 so that the metal structural member can form the second radiator 220.

[0078] The first radiator 210 is also electrically connected to the grounding point 250. For example, the middle frame 110 of the electronic device 100 may also include a metal middle plate 112, which may be connected to the metal frame 111. The grounding point 250 of the antenna structure 200 may be electrically connected to the metal middle plate 112. In this way, the electromagnetic wave signal on the first radiator 210 can also be transmitted to the metal middle plate 112 through the grounding point 250, so that the electromagnetic wave signal can be emitted outward through the metal middle plate 112, thereby improving the propagation intensity of the electromagnetic wave signal.

[0079] The impedance conjugate of the first radiator 210 in the first state and the second radiator 220 in the second state. The first state refers to the transmission line 230 supplying electromagnetic energy solely to the first radiator 210, and the second state refers to the transmission line 230 supplying electromagnetic energy solely to the second radiator 220. For example, when the antenna structure 200 is in the first state, the second radiator 220 can be disconnected from the transmission line 230, allowing the transmission line 230 to supply power solely to the first radiator 210. That is, the first radiator 210 is in a one-way state, and its impedance can be determined. When the antenna structure 200 is in the second state, the first radiator 210 can be disconnected from the transmission line 230, allowing the transmission line 230 to supply power solely to the second radiator 220. That is, the second radiator 220 is in a one-way state, and its impedance can be determined. The impedance is in complex form, which includes a real part and an imaginary part. When the impedance of the first radiator 210 in the single-pass state is conjugate with the impedance of the second radiator 220 in the single-pass state, the real parts of the impedance of the first radiator 210 and the impedance of the second radiator 220 are equal, and the imaginary parts are opposites of each other.

[0080] Compared to related technologies that use only camera decorative parts and metal frames as antennas, this embodiment of the application electrically connects the first radiator 210 and the second radiator 220 via a transmission line 230, and makes the impedance of the first radiator 210 in its single-pass state conjugate with the impedance of the second radiator 220 in its single-pass state. Thus, when the transmission line 230 simultaneously feeds power to both the first radiator 210 and the second radiator 220, electromagnetic wave signals are radiated outwards through both radiators. At this time, the load impedances of the first radiator 210 and the second radiator 220 can be matched, allowing their modes to merge, effectively increasing the radiation bandwidth of the electromagnetic wave signal. This effectively increases the radiation intensity of the antenna structure 200 over a wide frequency band, improving the reliability and stability of the electronic device 100's communication.

[0081] Furthermore, by simultaneously transmitting and receiving signals through the first radiator 210 and the second radiator 220, the signal strength and coverage of the antenna structure 200 can be effectively increased, enabling the antenna structure 200 to transmit and receive electromagnetic wave signals from multiple directions, thereby effectively improving the communication reliability of the electronic device 100.

[0082] In this embodiment, the electrical connection between any two structural components, for example, the connection between transmission line 230 and feed point 240, can be achieved through a metal spring, welding, or, in some examples, electrical coupling. This embodiment does not limit the method of electrical connection between transmission line 230 and feed point 240, as long as it enables the transmission of electromagnetic wave signals between them.

[0083] Accordingly, the electrical connection between any two structural components involved in the embodiments of this application can be achieved by means of metal springs, welding or electrical coupling, which will not be elaborated here.

[0084] See also Figure 4 As shown in this embodiment, the first radiator 210 can be a ring-shaped structure. For example, when the first radiator 210 is disposed on the back cover 130 of the electronic device 100, the first radiator 210 can surround the camera to serve a decorative purpose. For example, the first radiator 210 can be a circular ring structure. Alternatively, in some examples, the first radiator 210 can also be a rectangular ring structure or a triangular ring structure. Or, the first radiator 210 can also be an irregular ring structure. Specifically, the structure of the first radiator 210 can be selected and set according to the specific application scenario and design requirements. In this embodiment, the first radiator 210 will be described as a circular ring structure.

[0085] The second radiator 220 can be a strip structure. For example, the second radiator 220 can be part of the metal frame 111 of the electronic device 100. For instance, the length of the second radiator 220 can be determined based on the wavelength of the electromagnetic wave signal radiated by the second radiator 220, so that a corresponding length is cut off from the metal frame 111. Alternatively, the second radiator 220 can also be a separately set structural component and attached to the middle frame 110 of the electronic device 100. For instance, when the frame of the electronic device 100 is a non-metallic component, the length of the second radiator 220 can be designed based on the radiation wavelength of the second radiator 220, and the second radiator 220 can be attached to the middle frame 110 of the electronic device 100. For instance, the second radiator 220 can be attached to the inner side of the non-metallic frame 111, or it can be attached to the outer side of the non-metallic frame 111.

[0086] See also Figure 4 As shown, the antenna structure 200 may further include a connecting post 270. One end of the connecting post 270 can be electrically connected to the first radiator 210. For example, one end of the connecting post 270 can be connected to the end of the first radiator 210 near the transmission line 230. The other end of the connecting post 270 can be electrically connected to the second end of the transmission line 230, so that the first radiator 210 can be electrically connected to the second end of the transmission line 230 through the connecting post 270. For example, the connecting post 270 and the transmission line 230 can be angled, for example, the connecting post 270 and the transmission line 230 can be perpendicular to each other. When the first radiator 210 is located on the back cover 130 of the electronic device 100, and the transmission line 230 is located on the metal middle plate 112 of the electronic device 100, there is a certain distance between the first radiator 210 and the metal middle plate 112, so that the transmission line 230 and the first radiator 210 are in the thickness direction of the electronic device 100 (i.e., Figure 4 The x-direction in the equation has a certain distance.

[0087] At this point, by setting a connecting post 270 between the transmission line 230 and the first radiator 210, and electrically connecting one end of the connecting post 270 to the first radiator 210 and the other end to the transmission line 230, the first radiator 210 and the transmission line 230 can be electrically connected through the connecting post 270, allowing the transmission line 230 to transmit electromagnetic energy to the first radiator 210 through the connecting post 270. This helps improve the rationality and reliability of the connections between structural components in the electronic device 100, and enhances the rationality of the layout of structural components in the electronic device 100.

[0088] See also Figure 4As shown, the antenna structure 200 may further include a grounding post 280. One end of the grounding post 280 can be electrically connected to the first radiator 210, and the other end of the grounding post 280 can be electrically connected to a grounding point 250, so that the first radiator 210 can be electrically connected to the grounding point 250 through the grounding post 280, and electrically connected to the metal plate 112 in the electronic device 100 through the grounding point 250. For example, the grounding post 280 and the grounding point 250 can be electrically connected by a metal spring, welding, or electrical coupling. The electromagnetic wave signal on the first radiator 210 can be transmitted to the grounding point 250 through the grounding post 280, and then to the metal plate 112 of the electronic device 100 through the grounding point 250, so that the electromagnetic wave signal can be radiated outward through the metal plate 112.

[0089] The grounding post 280 can be electrically connected to any position on the first radiator 210. For example, the grounding post 280 can be as follows: Figure 4 The arrangement shown is positioned opposite to the connecting post 270. At this time, the positions where the grounding post 280 is connected to the first radiator 210 and the connecting post 270 is connected to the first radiator 210 are located on the diameter of the first radiator 210.

[0090] Alternatively, in some examples, the lines connecting the grounding post 280 and the center of the first radiator 210, and the lines connecting the connecting post 270 and the center of the first radiator 210, can be angled. For example, the included angle between the two lines can be 60°, 90°, or 120°. Specifically, the connection position between the grounding post 280 and the first radiator 210 can be selected and set according to the specific structure of the electronic device 100 and the specific application scenario.

[0091] Figure 5 This is a schematic diagram of the second antenna structure provided in the embodiments of this application. Figure 6 This is a schematic diagram of a structure in which two grounding posts are disposed on a first radiator, as provided in an embodiment of this application.

[0092] See Figure 5 and Figure 6As shown in this embodiment, the number of grounding posts 280 can be two. For example, the two grounding posts 280 can be a first grounding post 281 and a second grounding post 282, and the number of grounding points 250 can also be two. One end of the first grounding post 281 and the second grounding post 282 can be electrically connected to the first radiator 210, and the other end of the first grounding post 281 and the second grounding post 282 can be electrically connected to the two grounding points 250, respectively. The electromagnetic wave signal on the first radiator 210 can be transmitted to the two grounding points 250 through the first grounding post 281 and the second grounding post 282, and then transmitted to the metal middle plate 112 through the two grounding points 250, so that the electromagnetic wave signal can be radiated outward through the metal middle plate 112.

[0093] Alternatively, in some examples, the number of grounding posts 280 may be multiple; this application embodiment does not limit the number of grounding posts 280. Specifically, the number of grounding posts 280 can be selected and set according to the specific structural design and application scenario.

[0094] The line connecting the first grounding post 281 and the second grounding post 282 can pass through the center of the first radiator 210. Alternatively, in some examples, the line connecting the centers of the first grounding post 281 and the first radiator 210 can be angled with the line connecting the centers of the second grounding post 282 and the first radiator 210. For example, the angle between the line connecting the centers of the first grounding post 281 and the first radiator 210 and the line connecting the centers of the second grounding post 282 and the first radiator 210 can be 60°, 90°, or 120°, etc. Specifically, the positions of the first grounding post 281 and the second grounding post 282 on the first radiator 210 can be selected and set according to the electromagnetic wave radiation requirements of the antenna structure 200 or the specific application scenario.

[0095] It should be noted that, in this embodiment, the line connecting the first grounding post 281 and the second grounding post 282 refers to the line connecting the two points where the first grounding post 281 and the second grounding post 282 are connected to the first radiator 210. In other words, the line connecting the first grounding post 281 and the second grounding post 282 is parallel to the plane where the first radiator 210 is located, rather than being an inclined line. Correspondingly, the line connecting the first grounding post 281, the second grounding post 282, and the center of the radiator is also parallel to the plane where the first radiator 210 is located.

[0096] In the embodiments of this application, see also Figure 6As shown, the line connecting the two grounding posts 280 in the antenna structure 200 passes through the center of the first radiator 210, and this line is perpendicular to the line connecting the connection point of the first radiator 210 and the transmission line 230 to the center of the first radiator 210. In other words, the line connecting the two points where the first grounding post 281 and the second grounding post 282 are connected to the first radiator 210 is perpendicular to the line connecting the point where the connecting post 270 is connected to the first radiator 210 to the center of the first radiator 210. This improves the regularity of the distribution of the grounding posts 280 and the connecting posts 270 on the first radiator 210, which helps to realize different operating modes of the antenna so that the antenna can meet different operating requirements.

[0097] Figure 7 This is a schematic diagram of a matching circuit arranged in an antenna structure according to an embodiment of this application.

[0098] See Figure 7 As shown, the antenna structure 200 may also include two matching circuits 260. One end of one of the matching circuits 260 can be electrically connected to the second end of the transmission line 230, and the other end can be electrically connected to the first radiator 210. One end of the other matching circuit 260 can be electrically connected to the second end of the transmission line 230, and the other end can be electrically connected to the second radiator 220. For example, see... Figure 7 As shown, the two matching circuits 260 can be matching circuit 260a and matching circuit 260b, respectively. One end of matching circuit 260a can be electrically connected to the second end of transmission line 230, and the other end of matching circuit 260a can be electrically connected to the first radiator 210. One end of matching circuit 260b can be electrically connected to the second end of transmission line 230, and the other end can be electrically connected to the second radiator 220.

[0099] Matching circuit 260 can adjust the impedance of the first radiator 210 and the second radiator 220. For example, matching circuit 260a can adjust the impedance of the first radiator 210, and matching circuit 260b can adjust the impedance of the second radiator 220. This allows the impedances of the first radiator 210 and the second radiator 220 to be conjugate in single-pass mode, enabling the load impedances of the first radiator 210 and the second radiator 220 to be mutually matched when they are operating simultaneously. This allows the operating modes of the first radiator 210 and the second radiator 220 to be integrated, thereby effectively increasing the radiation bandwidth of the electromagnetic wave signal and increasing the radiation intensity of the antenna structure 200.

[0100] Figure 8 This is a schematic diagram of a matching circuit provided in an embodiment of this application. Figure 9 This is a schematic diagram of another matching circuit provided in an embodiment of this application.

[0101] See Figure 8 As shown, each matching circuit 260 may include a first circuit 261, which may include at least one of a first inductor 2611 and a first capacitor 2612. When the first circuit 261 includes the first inductor 2611 and the first capacitor 2612, the first inductor 2611 and the first capacitor 2612 may be connected in series. One end of the first circuit 261 may be electrically connected to the second end of the transmission line 230, and the other end of the first circuit 261 may be electrically connected to the first radiator 210 or the second radiator 220.

[0102] For example, participate Figure 8 As shown, the matching circuit 260a may include a first circuit 261a, which may include at least one of a first inductor 2611a and a first capacitor 2612a. When the first circuit 261a includes the first inductor 2611a and the first capacitor 2612a, the first inductor 2611a and the first capacitor 2612a may be connected in series. One end of the first circuit 261a may be electrically connected to the second end of the transmission line 230, and the other end may be electrically connected to the first radiator 210. Accordingly, see [link to relevant documentation]. Figure 9 As shown, the matching circuit 260b may include a first circuit 261b, which may include at least one of a first inductor 2611b and a first capacitor 2612b. Furthermore, when the first circuit 261b includes the first inductor 2611b and the first capacitor 2612b, the first inductor 2611b and the first capacitor 2612b may be connected in series. One end of the first circuit 261b may be electrically connected to the second end of the transmission line 230, and the other end may be electrically connected to the second radiator 220.

[0103] Taking the adjustment of the impedance of the first radiator 210 by the first circuit 261a as an example, the first inductor 2611a and the first capacitor 2612a can adjust the impedance of the first radiator 210. For example, the imaginary part of the first radiator 210 can be changed so that the imaginary part of the impedance of the first radiator 210 in the single-pass state is the opposite of the imaginary part of the impedance of the second radiator 220 in the single-pass state. For example, during the debugging process, depending on the specific situation, the first circuit 261a can include only the first inductor 2611a, in which case the capacitive reactance of the first capacitor 2612a is equivalent to zero. Alternatively, the first circuit 261a can also include only the first capacitor 2612a, in which case the inductive reactance of the first inductor 2611a is equivalent to zero. Or, in some examples, the first circuit 261a can also include both the first inductor 2611a and the first capacitor 2612a, in which case the inductive reactance of the first inductor 2611a and the capacitive reactance of the first capacitor 2612a are both greater than zero. Specifically, the inductive reactance of the first inductor 2611a and the capacitive reactance of the first capacitor 2612a can be selected and set according to the specific application scenario.

[0104] Correspondingly, the first inductor 2611b and the first capacitor 2612b in the first circuit 261b can adjust the impedance of the second radiator 220 to change the imaginary part of the second radiator 220, so that the imaginary part of the impedance of the second radiator 220 in the single-pass state is opposite to the imaginary part of the impedance of the first radiator 210 in the single-pass state. For example, the first circuit 261b may include only the first inductor 2611b, in which case the capacitive reactance of the first capacitor 2612b is equivalent to zero. Alternatively, the first circuit 261b may also include only the first capacitor 2612b, in which case the inductive reactance of the first inductor 2611b is equivalent to zero. Or, in some examples, the first circuit 261b may also include both the first inductor 2611b and the first capacitor 2612b, in which case the inductive reactance of the first inductor 2611 and the capacitive reactance of the first capacitor 2612 are both greater than zero. Specifically, the inductive reactance of the first inductor 2611b and the capacitive reactance of the first capacitor 2612b can be selected and set according to the specific application scenario.

[0105] See also Figure 8 and Figure 9 As shown, each matching circuit 260 may further include a second circuit 262. The second circuit 262 may include at least one of a second inductor 2621 and a second capacitor 2622. When the second circuit 262 includes a second inductor 2621 and a second capacitor 2622, the second inductor 2621 and the second capacitor 2622 may be connected in series. One end of the second circuit 262 may be electrically connected to the first circuit 261, and the other end may be grounded.

[0106] For example, see Figure 8As shown, the matching circuit 260a may include a second circuit 262a. The second circuit 262a may include at least one of a second inductor 2621a and a second capacitor 2622a. When the second circuit 262a includes the second inductor 2621a and the second capacitor 2622a, the second inductor 2621a and the second capacitor 2622a may be connected in series. One end of the second circuit 262a may be electrically connected to the first circuit 261a, and the other end may be grounded. For example, the other end of the second circuit 262a may be grounded by being electrically connected to the metal middle plate 112 in the electronic device 100.

[0107] Accordingly, see Figure 9 As shown, the matching circuit 260b may include a second circuit 262b, which may include at least one of a second inductor 2621b and a second capacitor 2622b. Furthermore, when the second circuit 262b includes the second inductor 2621b and the second capacitor 2622b, the second inductor 2621b and the second capacitor 2622b may be connected in series. One end of the second circuit 262b may be electrically connected to the first circuit 261b, and the other end may be grounded. For example, the other end of the second circuit 262b may be grounded by being electrically connected to the metal middle plate 112 in the electronic device 100.

[0108] The second inductor 2621 and the second capacitor 2622 can serve as impedance matching between the second circuit 262 and the metal intermediate plate 112, thereby improving the transmission efficiency of electromagnetic wave signals between the second circuit 262 and the metal intermediate plate 112. For example, taking the second circuit 262a as an example, based on the impedance of the second circuit 262a and the metal intermediate plate 112, the second circuit 262a can include only the second inductor 2621a, in which case the capacitive reactance of the second capacitor 2622a is equivalent to zero. Alternatively, the second circuit 262a can also include only the second capacitor 2622a, in which case the inductive reactance of the second inductor 2621a is equivalent to zero. Or, in some examples, the second circuit 262a can also include both the second inductor 2621a and the second capacitor 2622a, in which case the inductive reactance of the second inductor 2621a and the capacitive reactance of the second capacitor 2622a are both greater than zero. Specifically, the inductive reactance value of the second inductor 2621a and the capacitive reactance value of the second capacitor 2622a can be selected and set according to the specific application scenario.

[0109] Correspondingly, the impedance of the second circuit 262b can also be set according to the impedance of the metal middle plate 112. For example, the second circuit 262b can include only the second inductor 2621b, in which case the capacitive reactance of the second capacitor 2622b is equivalent to zero. Alternatively, the second circuit 262b can also include only the second capacitor 2622b, in which case the inductive reactance of the second inductor 2621b is equivalent to zero. Or, in some examples, the second circuit 262b can also include both the second inductor 2621b and the second capacitor 2622b, in which case the inductive reactance of the second inductor 2621b and the capacitive reactance of the second capacitor 2622b are both greater than zero. Specifically, the inductive reactance value of the second inductor 2621b and the capacitive reactance value of the second capacitor 2622b can be selected and set according to the specific application scenario.

[0110] It should be noted that the specific location of the electrical connection between the second circuit 262 and the first circuit 261 can be varied. For example, taking the electrical connection between the second circuit 262a and the first circuit 261a as an example, the connection point between the second circuit 262a and the first circuit 261a can be located between the first inductor 2611a and the first capacitor 2612a. Alternatively, the connection point between the second circuit 262a and the first circuit 261a can also be located on the side of the first inductor 2611a that faces away from the first capacitor 2612a. This application does not limit the specific location of the electrical connection between the second circuit 262 and the first circuit 261.

[0111] Correspondingly, the connection position between the second circuit 262b and the first circuit 261b can also be set with reference to the connection position between the second circuit 262a and the first circuit 261a, which will not be elaborated here.

[0112] Figure 10 This is a schematic diagram of a transmission line structure provided in an embodiment of this application.

[0113] See Figure 10 As shown, the transmission line 230 may include a trunk line 231, a first branch line 232, and a second branch line 233. The feed point 240 may be electrically connected to the first end of the trunk line 231. For example, the first end of the trunk line 231 may be electrically connected to the feed point 240 by means of a metal spring, welding, or electrical coupling, so that the feed point 240 can supply power or power input to the transmission line 230 through the first end of the trunk line 231.

[0114] One end of the first branch line 232 can be electrically connected to the second end of the main line 231, and the other end of the first branch line 232 can be electrically connected to the first radiator 210, so that the first radiator 210 can be electrically connected to the main line 231 through the first branch line 232. For example, the first branch can be electrically connected to the connecting post 270, so that the first branch can be electrically connected to the first radiator 210 through the connecting post 270.

[0115] One end of the second branch line 233 can be electrically connected to the second end of the main line 231, and the other end of the second branch line 233 can be electrically connected to the second radiator 220, so that the second radiator 220 can be electrically connected to the main line 231 through the second branch line 233. Furthermore, the first branch line 232 and the second branch line 233 can be spaced apart along the length of the main line 231. For example, the distance between the first branch line 232 and the second branch line 233 on the transmission line 230 can be determined based on the specific positions of the first radiator 210 and the second radiator 220, thereby improving the rationality of the distribution of the first branch line 232 and the second branch line 233 on the main line 231.

[0116] The first end of the trunk line 231 can be understood as the first end of the transmission line 230, and the second end of the trunk line 231 can be understood as the second end of the transmission line 230.

[0117] The matching circuit 260 can be connected in series with the first branch line 232 and the second branch line 233, respectively. For example, see Figure 10 As shown, the matching circuit 260a can be connected in series on the first branch line 232. For example, the first inductor 2611a and the first capacitor 2612a in the matching circuit 260a can be connected in series on the first branch line 232 so that the matching circuit 260a can adjust the impedance of the first radiator 210 connected to the first branch line 232. The electromagnetic wave signal fed into the feed point 240 can be transmitted to the first radiator 210 through the matching circuit 260a on the first branch line 232, and radiated outward through the first radiator 210.

[0118] Matching circuit 260b can be connected in series on second branch line 233. For example, the first inductor 2611b and the first capacitor 2612b in matching circuit 260b can be connected in series on second branch line 233 so that matching circuit 260b can adjust the impedance of second radiator 220 connected on second branch line 233. Electromagnetic wave signal fed into feed point 240 can be transmitted to second radiator 220 through matching circuit 260b on second branch line 233 and radiated outward through second radiator 220.

[0119] The performance of the antenna structure 200 provided in the embodiments of this application is simulated and tested below with reference to the accompanying drawings. For example, by inputting the dimensional parameters of the antenna structure 200 into the test system, the test results of the antenna structure 200 can be obtained. For example, the dimensions of the first radiator 210, the second radiator 220, the grounding post 280 and the connecting post 270, and the transmission line 230 can be input into the test system to test the antenna's performance parameters.

[0120] Figure 11 This is a front view of a first radiator provided in an embodiment of this application. Figure 12 This is a top view of a first radiator provided in an embodiment of this application.

[0121] For example, see Figure 11 and Figure 12 As shown, the inner diameter of the first radiator 210 can be R1, and the value of R1 can be 5mm. The outer diameter of the first radiator 210 can be R2, and the value of R2 can be 11.5mm. The thickness of the first radiator 210 can be h1, and the value of h1 can be 2.3mm.

[0122] Figure 13 This is a schematic diagram of the structure of a second radiator provided in an embodiment of this application.

[0123] See Figure 13 As shown, the length of the second radiator 220 of the strip structure can be L1, and the value of L1 can be 11.6 mm. The width of the second radiator 220 can be W, and the value of W can be 4.2 mm. The height of the second radiator 220 can be h2, and the value of h2 can be 2.1 mm.

[0124] Figure 14 This is a schematic diagram of the dimensions of a transmission line provided in an embodiment of this application.

[0125] See Figure 14 As shown, the length of the main trunk 231 of transmission line 230 can be L2, and L2 can be 7.95mm. The length of the first branch line 232 can be L3, and L3 can be 1.1mm. The length of the second branch line 233 can be L4, and L4 can be 0.7mm. The distance between the first branch line 232 and the first end of the main trunk 231 can be d1, and d1 can be 1.85mm. The distance between the second branch line 233 and the first end of the main trunk 231 can be d2, and d2 can be 7.4mm.

[0126] Figure 15 This is a schematic diagram of a connecting column provided in an embodiment of this application.

[0127] See Figure 15 As shown, the length of the connecting post 270 can be L5, where L5 can be 6.15mm, and the diameter of the connecting post 270 can be D, where D can be 1.6mm. The dimensions of the grounding post 280 can be the same as those of the connecting post 270, and will not be elaborated further here.

[0128] By inputting the aforementioned dimensional parameters of antenna structure 200 into the test system, the return loss diagram and antenna efficiency diagram of antenna structure 200 can be obtained respectively.

[0129] Figure 16 This is a return loss diagram of the first antenna structure provided in the embodiments of this application. Figure 17 The radiation efficiency diagram of the first antenna structure provided in the embodiments of this application.

[0130] See Figure 16 As shown, Figure 16 The antenna return loss diagram (S11 curve) is shown for antenna structure 200 including a grounding post 280. From Figure 15 It can be concluded that the electromagnetic wave return loss of the antenna structure 200 is relatively large in the two frequency bands of 2.4GHz~2.5GHz and 5.15GHz~5.85GHz, indicating that the antenna radiates a large number of electromagnetic wave signals in the 2.4GHz~2.5GHz and 5.15GHz~5.85GHz bands, which meets the bandwidth requirements of the antenna structure 200.

[0131] It should be noted that the S11 parameter is usually negative. The smaller the S11 parameter, the lower the antenna return loss, the less energy reflected back by the antenna itself, which means more energy actually enters the antenna, resulting in higher system efficiency. Conversely, the larger the S11 parameter, the greater the antenna return loss, and the lower the system efficiency. In engineering, an S11 value of -6dB is generally used as the standard. When the S11 value of an antenna is less than -6dB, the antenna can be considered to be working normally, or its transmission and reception efficiency can be considered to be good. Therefore, the antenna structure 200 provided in this embodiment has good transmission and reception efficiency in the 2.4GHz~2.5GHz and 5.15GHz~5.85GHz ranges.

[0132] See Figure 17 As shown, Figure 17 The antenna radiation efficiency diagram is shown for antenna structure 200 including a grounding post 280. Figure 17 It can be concluded that antenna structure 200 has good radiation efficiency in the two frequency bands of 2.4GHz~2.5GHz and 5.15GHz~5.85GHz, which meets the radiation efficiency index of the antenna.

[0133] Figure 18The return loss diagram of the second antenna structure 200 provided in the embodiments of this application is shown. Figure 19 Radiation efficiency diagram of the second antenna structure 200 provided in the embodiments of this application.

[0134] See Figure 18 As shown, Figure 18 The antenna return loss diagram is shown for antenna structure 200 including two grounding posts (first grounding post 281 and second grounding post 282). Figure 18 It can be concluded that the electromagnetic wave return loss of the antenna structure 200 is relatively large in the two frequency bands of 2.4GHz~2.5GHz and 5.15GHz~5.85GHz, indicating that the antenna radiates a large number of electromagnetic wave signals in the 2.4GHz~2.5GHz and 5.15GHz~5.85GHz bands, which meets the bandwidth requirements of the antenna structure 200.

[0135] See Figure 19 As shown, Figure 19 The antenna efficiency diagram is shown for antenna structure 200 including two grounding posts (first grounding post 281 and second grounding post 282). Figure 19 It can be concluded that antenna structure 200 has good radiation efficiency in the two frequency bands of 2.4GHz~2.5GHz and 5.15GHz~5.85GHz, which meets the radiation efficiency index of the antenna.

[0136] The impedance matching results of the first radiator 210 and the second radiator 220 in a single-pass state are tested below with reference to the accompanying drawings. For example, the second radiator 220 can be disconnected from the transmission line 230, so that the feed point 240 at the first end of the transmission line 230 feeds the first radiator 210 alone, that is, the first radiator 210 is in a single-pass state. At this time, the Smith chart of the first radiator 210 can be obtained. For example, the second branch line 233 can be disconnected from the main line 231, so that the second radiator 220 is disconnected from the feed point 240 on the transmission line 230, so that the electromagnetic energy at the feed point 240 can be transmitted to the first radiator 210 alone through the transmission line 230.

[0137] Correspondingly, the first radiator 210 can be disconnected from the transmission line 230, so that the feed point 240 at the first end of the transmission line 230 feeds the second radiator 220 alone, that is, the second radiator 220 is in a one-way state. At this time, the Smith chart of the second radiator 220 can be obtained. For example, the first branch line 232 can be disconnected from the main line 231, so that the first radiator 210 is disconnected from the feed point 240 on the transmission line 230, so that the electromagnetic energy on the feed point 240 can be transmitted to the second radiator 220 alone through the transmission line 230.

[0138] Figure 20The Smith chart of the first radiator in a single-pass state provided in the embodiments of this application. Figure 21 Smith chart of the second radiator in single-pass state provided in the embodiments of this application.

[0139] See Figure 20 and Figure 21 As shown, Figure 20 This is a Smith chart of the first radiator 210 in a single-pass state. Figure 21 The figure shows the Smith chart of the second radiator 220 in single-pass mode. Curve S1 is the Smith chart for 2.4 GHz, curve S2 is the Smith chart for 2.5 GHz, and curve S3 is the Smith chart for other frequency bands. It can be seen from the figure that the Smith charts of the first radiator 210 and the second radiator 220 in single-pass mode are conjugates. Thus, when the first radiator 210 and the second radiator 220 are simultaneously electrically connected to the transmission line 230 to radiate electromagnetic wave signals, their load impedances can be matched, allowing their modes to merge and increasing the radiation bandwidth of the electromagnetic wave signal. This effectively increases the radiation intensity of the antenna structure 200 over a wide frequency band.

[0140] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances. The terms "first," "second," "third," "fourth," etc. (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them; although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An antenna structure, characterized by Comprising: a first radiator, a second radiator, a transmission line, a feed point and a ground point; a first end of the transmission line is electrically connected with the feed point, a second end of the transmission line is electrically connected with the first radiator and the second radiator respectively, and the first radiator is electrically connected with the ground point; and the impedance of the first radiator in a first state and the second radiator in a second state are conjugate, the first state is that the transmission line alone delivers electromagnetic energy to the first radiator, and the second state is that the transmission line alone delivers electromagnetic energy to the second radiator.

2. The antenna structure of claim 1, wherein, Further comprising: two matching circuits; one end of one of the two matching circuits is electrically connected with the second end of the transmission line, and the other end is electrically connected with the first radiator; one end of the other of the two matching circuits is electrically connected with the second end of the transmission line, and the other end is electrically connected with the second radiator.

3. The antenna structure of claim 2, wherein, Each of the matching circuits comprises: a first circuit, the first circuit comprising at least one of a first capacitance and a first inductance; and when the first circuit comprises the first inductance and the first capacitance, the first inductance and the first capacitance are connected in series; one end of the first circuit is electrically connected with the second end of the transmission line, and the other end is electrically connected with the first radiator or the second radiator.

4. The antenna structure of claim 3, wherein, Each of the matching circuits further comprises: a second circuit, the second circuit comprising at least one of a second capacitance and a second inductance; and when the second circuit comprises the second inductance and the second capacitance, the second inductance and the second capacitance are connected in series; one end of the second circuit is electrically connected with the first circuit, and the other end is grounded.

5. The antenna structure of any of claims 2 to 4, wherein, The transmission line comprises: a main line, a first branch line and a second branch line; the feed point is electrically connected with a first end of the main line; one end of the first branch line is electrically connected with a second end of the main line, and the other end is electrically connected with the first radiator; one end of the second branch line is electrically connected with the second end of the main line, and the other end is electrically connected with the second radiator, and the first branch line and the second branch line are arranged along the length of the main line; the two matching circuits are connected in series on the first branch line and the second branch line respectively.

6. The antenna structure of any one of claims 1 to 5, wherein, Further comprising a connecting column, one end of the connecting column is electrically connected with the first radiator, and the other end is electrically connected with the second end of the transmission line, so that the first radiator is electrically connected with the second end of the transmission line through the connecting column.

7. The antenna structure of any one of claims 1 to 6, wherein, Further comprising at least one ground column, one end of the ground column is electrically connected with the first radiator, and the other end is electrically connected with the ground point.

8. The antenna structure of claim 7, wherein, The number of the ground columns is two, the two ground columns are a first ground column and a second ground column respectively, and the number of the ground points is two; one end of the first ground column and the second ground column is electrically connected with the first radiator, and the other end is electrically connected with the two ground points respectively.

9. The antenna structure of claim 8, wherein, The connection line of the two ground columns passes through the center of the first radiator, and is perpendicular to the connection line between the connection point of the first radiator and the transmission line and the center of the first radiator.

10. The antenna structure of any one of claims 1 to 9, wherein, The first radiator is a ring structure. The second radiator is a strip structure.

11. An electronic device, comprising: The application further discloses a mobile phone comprising the antenna structure. The mobile phone comprises a middle frame, a display screen, a back cover and the antenna structure. The middle frame is located between the display screen and the back cover, the first radiator of the antenna structure is located on the back cover or between the middle frame and the back cover. The second radiator of the antenna structure is located on the middle frame.

12. The electronic device of claim 11, wherein, The middle frame comprises a metal frame, at least a part of the metal frame forming the second radiator of the antenna structure.

13. The electronic device of claim 12, wherein, The middle frame further comprises a metal middle plate connected with the metal frame, and the grounding point of the antenna structure is electrically connected with the metal middle plate.

14. The electronic device of any of claims 11 to 13, wherein, The back cover is provided with a camera decoration piece, the camera decoration piece is a metal piece, and the camera decoration piece forms the first radiator of the antenna structure.

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