Antenna device and electronic product
By designing two feeding points in the antenna device, which are used for the paths of high-power signals and low-power signals, the problem of overvoltage of antenna switches under high-power signals is solved, and voltage reduction and cost savings are achieved.
Patent Information
- Application Number
- CN202421795372.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-26
AI Technical Summary
In the prior art, antenna switches have an overvoltage risk when high power signals pass through, which may lead to excessive voltage and risk of overvoltage.
An antenna device is designed. The first antenna is equipped with two feeding points to form paths of different distances. High power signals and low power signals pass through different paths respectively to reduce the voltage of the antenna switch.
By separating the paths of high-power signals and low-power signals, the voltage of the antenna switch is effectively reduced, the risk of overvoltage is reduced, and the procurement cost of antenna switches is reduced.
Smart Images
Figure CN223023592U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of wireless communication, and particularly relates to an antenna device. Background Art
[0002] An antenna is a structure used for transmitting and receiving wireless signals, and is widely used in devices such as smart terminals, drones, and laptop computers. With the increasing demand for narrow bezels and multi-band designs in these devices, the design direction of antennas tends to be smaller in size and cover more frequency bands.
[0003] Existing Technical Solutions Figure 1 In the existing technology, the distance between the antenna open end (point A) is relatively close, and the feeding point (point B) needs to be connected to the antenna switch. When a high-power signal (2G GSM850 / 900) passes through, it may cause the voltage of the antenna switch to be too large, resulting in an overvoltage risk. Utility Model Content
[0004] This application provides an antenna device and an electronic product, aiming to solve the problem of overvoltage risk in the antenna switch in the existing technology.
[0005] This application provides an antenna device and an electronic product, including: a first antenna, the first antenna is provided with a first feeding point and a second feeding point at different distances from its open end; an antenna switch, the antenna switch is connected to the first feeding point and the second feeding point and forms a path respectively, and when one of the first feeding point and the second feeding point is in a working state, the other is in an off state.
[0006] Optionally, the distance between the first feeding point and the open end is less than the distance between the second feeding point and the open end; and
[0007] Signals higher than the preset power threshold use the path formed by the second feeding point, and signals lower than the preset power threshold use the path formed by the first feeding point.
[0008] Optionally, the first feeding point is adjacent to the open end, and the second feeding point is close to or located at the middle position of the antenna device.
[0009] Optionally, it further includes: a switching switch, the output end of the switching switch is electrically connected to the first feeding point and the second feeding point, and is used to switch the working state and the off state of the two; a main path, which can tune the signals input to the antenna device; the input end of the switching switch is connected to the main path and the antenna switch, and the signals of the main path are transmitted to at least one of the first feeding point and the second feeding point through the switching switch.
[0010] Optionally, it further includes a voltage-dividing inductor, an antenna switch, and an antenna matching circuit; among them,
[0011] The voltage-dividing inductor is connected between the antenna switch and the switching switch;
[0012] The antenna switch is connected to ground through the antenna matching circuit;
[0013] The main path includes an antenna matching circuit, and the antenna matching circuit is connected to the switching switch.
[0014] Optionally, it further includes: a main path capable of tuning the signal input to the antenna device, the main path is simultaneously connected to the first feeding point and the second feeding point and transmits the signal to at least one of them; a first antenna switch for switching the working state and the disconnected state of the first feeding point; a second antenna switch for switching the working state and the disconnected state of the second feeding point.
[0015] Optionally, the main path is connected to the first feeding point through a first antenna matching circuit, the first antenna switch is connected to the first feeding point through a first voltage-dividing inductor, and the first antenna switch is grounded through a first switch matching circuit; and / or, the main path is connected to the second feeding point through a second antenna matching circuit, the second antenna switch is connected to the second feeding point through a second voltage-dividing inductor, and the second antenna switch is grounded through a second switch matching circuit; and / or, a switching switch is connected between the first feeding point and the second feeding point, and the switching switch is used for switching the working state and the disconnected state of the two.
[0016] Optionally, it further includes a second antenna, and the first antenna and the second antenna are isolated from each other by a slot, and the ends of the first antenna and the second antenna at the slot form respective open ends;
[0017] The first antenna is a low-frequency antenna, and the second antenna is a high-frequency antenna.
[0018] Optionally, an isolated ground is provided in the slot, and a preset distance is provided between the first antenna and the isolated ground, and a preset distance is provided between the second antenna and the isolated ground.
[0019] Optionally, the preset distance between the first antenna and the isolated ground is 0.8 mm - 2.5 mm; and / or, the preset distance between the second antenna and the isolated ground is 0.8 mm - 2.5 mm.
[0020] Optionally, the isolated ground and the whole-machine ground are different parts of the same piece of metal material; or, the isolated ground is a conductor and is electrically connected to the whole-machine ground.
[0021] This application also discloses an electronic product including the above-mentioned antenna device.
[0022] In the antenna device of the present application, two feeding points are provided on the first antenna, and they can form paths with different sizes, each responsible for the transceiver of a part of the signals. Among them, high-power signals and low-power signals respectively pass through different paths to reduce the antenna switching voltage under high-power signals.
[0023] Additional aspects and advantages of the embodiments of the present application will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present application. Description of the Drawings
[0024] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:
[0025] Figure 1 is a schematic diagram of an antenna structure in the prior art;
[0026] Figure 2 is a schematic diagram of the structure of the antenna device in some embodiments of the present application;
[0027] Figure 3 is a schematic diagram of the circuit of the antenna device in some embodiments of the present application;
[0028] Figure 4 is a schematic diagram of the circuit of the antenna device in some embodiments of the present application
[0029] Figure 5 is a curve graph comparing the voltages between the present application and the prior art. Detailed Embodiments
[0030] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the embodiments of the present application and cannot be understood as a limitation to the embodiments of the present application.
[0031] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In the description of the present application, the meaning of "a plurality of" is two or more unless otherwise specifically defined.
[0032] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0033] In the present application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.
[0034] The present disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described herein. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.
[0035] Such as Figure 2 And Figure 3As shown, in some embodiments of the present application, an antenna device is provided, including a first antenna 1 and an antenna switch 7.
[0036] Among them, the first antenna 1 is provided with a first feeding point and a second feeding point at different distances from its open end. For the convenience of description hereinafter, as Figure 2 shown, each point on the antenna device is labeled as follows: on the first antenna 1, the open end is point A, the position where the first feeding point is set is B, the position where the second feeding point is set is D, and the point connected to the whole machine ground is C. The labeling of these points is unified in each embodiment of this application and will not be repeated hereinafter.
[0037] Since the distances between the first feeding point B and the second feeding point D and the open end A are different, the length of the BC section is different from the length of the DC section. By means of software, hardware, etc., the antenna device is configured such that when one of the first feeding point B and the second feeding point D is in the working state, the other is in the disconnected state. In other words, at most only one of the first feeding point B and the second feeding point D is allowed to be in the working state, and the two are not allowed to be in the working state at the same time. Specifically, a judgment criterion can be preset by means of software, hardware, etc., to divide the signals received and transmitted by the first antenna 1 into two parts, with low-power signals using the first path and high-power signals using the second path, so that the first antenna 1 can subdivide the signals and use different paths correspondingly.
[0038] In this way, not only is it ensured that the antenna device can cover all required frequency bands, but also the high-power signals and low-power signals can be further routed separately to reduce the antenna voltage under high-power signals.
[0039] In some specific embodiments, the distance between the first feeding point B and the open end A is less than the distance between the second feeding point D and the open end A. That is, the length of the BC segment is greater than that of the DC segment. In some more specific embodiments, the first feeding point B and the second feeding point D are spaced apart by a certain distance, and the first feeding point B is adjacent to the open end A, while the second feeding point D is far from the open end A and is close to or located at the middle position of the entire antenna device, or at the middle position of the first antenna 1. The antenna device is configured such that signals above a preset power threshold (hereinafter simply referred to as high-power signals) are transmitted using the second path, and signals below the preset power threshold (hereinafter simply referred to as low-power signals) are transmitted using the first path. The preset power threshold is calibrated by the designer according to the actual signal frequency band and power range. The powers of the high-power signals and the low-power signals only differ in relative levels. For example, when the antenna device transmits signals in the 2G frequency band (second-generation mobile communication), 3G frequency band (third-generation mobile communication), 4G (fourth-generation mobile communication), and 5G (fifth-generation mobile communication) frequency bands, the high-power signals specifically refer to GSM850 and GSM900 in the 2G frequency band, and the transmission power can reach about 33 dBm (2 watts). The low-power signals specifically refer to the low-frequency transmission powers in the 3G, 4G, and 5G frequency bands, roughly including 26 dBm (0.4 watts) and 23 dBm (0.2 watts).
[0040] As Figure 2 shown, when a high-power signal is input from the second feeding point D, the current at the second feeding point D is significantly greater than the current at the first feeding point B (in fact, the current at the first feeding point B is close to zero). In contrast, for the voltage, the voltage at the second feeding point D is less than the voltage at the first feeding point B. In Figure 1 the prior art shown, the antenna 1a has only one feeding point B. When transmitting the same high-power signal as described above, the voltage at the feeding point B is relatively high, and the voltage of the antenna switch provided in the main board connected to the feeding point B is also relatively high, which is prone to the risks of overvoltage and breakdown. Moreover, the antenna switch itself that can withstand high voltage has a high procurement cost and few optional models. In this application, however, when the high-power signal is input from the second feeding point D, the voltage at the second feeding point D is lower than that at the first feeding point B, and the voltage of the antenna switch connected thereto is also lower, thus achieving voltage reduction for the antenna switch, not only reducing the risk of overvoltage, but also having a low procurement cost and many optional models, which brings convenience to the production of the antenna device.
[0041] When a low-power signal is input from the first feeding point B, since its power is relatively low, the corresponding switch voltage is also relatively low, and thus no special design is required.
[0042] As can be seen from the above, in the antenna device of the present application, two feeding points are provided on the first antenna 1, and the second feeding point D, which is farther from the open end A, is used as the feeding point for high-power signals. Compared with the antenna 1a in the prior art that uses point B as the feeding point, the first antenna 1 reduces the antenna switch voltage corresponding to the second feeding point D. The first feeding point B is used as the feeding point for low-power signals, and the antenna switch voltage required by itself is relatively low. Therefore, due to the setting of the dual feeding points, the voltage of the antenna switch is effectively reduced.
[0043] In a specific embodiment, when the first antenna 1 transmits GSM850 and GSM900 in the 2G frequency band (which belong to the high-power signals described above), according to the applicant's actual measurement, the switch voltage corresponding to GSM850 in the existing solution is 66.4V, while the corresponding switch voltage in the present application is 58.8V, a reduction of 7.6V. The switch voltage corresponding to GSM900 in the existing solution is 57.7V, and the corresponding switch voltage in the present application is 49.6V, a reduction of 8.1V, showing a significant voltage reduction effect. Figure 5 The voltage curve of the present application is shown in.
[0044] As Figure 3 shown, in some specific embodiments, the antenna device in the present application controls the connection states of the first feeding point B and the second feeding point D through the switching switch 4. Specifically, the antenna device includes a main path and a switching switch 4. The main path is used to tune the signal input to the antenna device and input the signal into the antenna device from the signal access point N. The signal access point N refers to the part where the antenna device is connected to the main path, and it is not limited to certain specific electrical structures, and can specifically be an interface, a socket, multiple contacts, etc.
[0045] The switching switch 4 is simultaneously connected to the first feeding point B and the second feeding point D. The switching switch 4 can switch the working states and the disconnected state of the two, and can switch at least among the following three modes according to the input instruction: (1) The first feeding point B is connected and enters the working state, and the second feeding point D is disconnected from the outside. (2) The second feeding point D is connected and enters the working state, and the first feeding point B is disconnected from the outside. (3) Both the first feeding point B and the second feeding point D are disconnected.
[0046] In addition to being able to switch the working states and the disconnected state of the first feeding point B and the second feeding point D, the switching switch 4 also serves as a part of the signal transmission path, and the signal input by the main path from the signal access point N is output to the first feeding point B or the second feeding point D in the working state through the switching switch 4.
[0047] For other parts in the antenna device, there is no need to consider the connection problem of the two feeding points. The main path and related electrical structures such as the antenna switch can be directly connected to the switching switch 4, and the overall electrical structure is relatively simple. Compared with traditional antennas, the modification is small.
[0048] More specifically, the antenna device further includes a voltage-dividing inductor 5, an antenna switch 7, and an antenna matching circuit 8. Among them, the voltage-dividing inductor 5 is connected to the antenna switch 7, and the antenna switch 7 is connected to the ground through the antenna matching circuit 8. The main path includes an antenna matching circuit 6, and the antenna matching circuit 6 is connected to the switching switch 4. The above electrical structure does not distinguish between high-power signals and low-power signals, which is equivalent to sharing a set of circuit solutions, and the cost is relatively low. After the main path tunes the signal, according to the type of the signal, the switching switch 4 is used to control the on-off states of the first feeding point B and the second feeding point D to achieve the aforementioned process. Since the voltage of the second feeding point D is reduced (compared with the feeding point B of the antenna 1a in the prior art), and together with the voltage-dividing inductor 5, the voltage of the antenna switch 7 can be effectively reduced. The above implementation mode has a small modification to the overall circuit and a low improvement cost.
[0049] As Figure 4 shown, in some other specific implementation modes, the antenna device controls the connection states of the first feeding point B and the second feeding point D through two sets of independent antenna switches. Specifically, the antenna device further includes a main path, a first antenna switch 71, and a second antenna switch 72. Among them, the main path is tuned through a first antenna matching circuit 61 and a second antenna matching circuit 62 respectively. The first antenna switch 71 is used to switch the working state and the off state of the first feeding point B, and the second antenna switch 72 is used to switch the working state and the off state of the second feeding point D. And through relevant software and hardware, the first antenna switch 71 and the second antenna switch 72 are restricted, and it is not allowed to connect the first feeding point B and the second feeding point D at the same time. In some other specific implementation modes, switching switches are provided at the first feeding point B and the second feeding point D for switching the working state and the off state of the first feeding point B and the second feeding point D.
[0050] In some specific implementation modes, the antenna device has two signal access points N. The main path is connected to the first antenna matching circuit 61 through one signal access point N, and the first antenna matching circuit 61 is connected to the first feeding point B; the main path is connected to the second antenna matching circuit 62 through the other signal access point N, and the second antenna matching circuit 62 is connected to the second feeding point D. In some other implementation modes, the number of signal access points N is one, and both high-power signals and low-power signals are input from this signal access point N.
[0051] More specifically, the first antenna switch 71 is connected to the first feeding point B through the first voltage-dividing inductor 51, and the first antenna switch 71 is grounded through the first switch matching circuit 81. The second antenna switch 72 is connected to the second feeding point D through the second voltage-dividing inductor 52, and the second antenna switch 72 is grounded through the second switch matching circuit 82. Since the first feeding point B and the second feeding point D have different voltages and currents in the working state, the relevant electrical characteristics of the first voltage-dividing inductor 51 and the first switch matching circuit 81 can be designed specifically for the first feeding point B; the relevant electrical characteristics of the second voltage-dividing inductor 52 and the second switch matching circuit 82 can be designed specifically for the second feeding point D, making their respective adaptabilities stronger. In addition, since the number of antenna tunings is increased on the main path, the antenna tuning accuracy can be further refined, the tuning effect can be improved, and the overall performance of the antenna device can be enhanced.
[0052] Figure 3 The embodiments shown and Figure 4 The embodiments shown, although adopting different circuit structure designs, can all achieve the aforementioned technical effects, reduce the voltage corresponding to the antenna switch, and the relevant content will not be repeated.
[0053] As Figure 2 shown, in some embodiments, the antenna device further includes a second antenna 2. The first antenna 1 and the second antenna 2 are isolated from each other through a slot M. The end of the first antenna 1 at the slot M constitutes its open end A, and the end C far from the slot M is connected to the whole machine ground. The end of the second antenna 2 at the slot M constitutes its open end E, and the end G far from the slot M is connected to the whole machine ground. The first antenna 1 and the second antenna 2 have different sizes and correspond to signals of different frequency bands.
[0054] In some embodiments, the first antenna 1 is a low-frequency antenna, and the second antenna 2 is a high-frequency antenna. In a more specific embodiment, the frequency bands adapted by the antenna device include 2G, 3G, 4G, 5G, GPS, WIFI, NFC, BT, etc., and the frequency coverage is: low frequency: 700 - 960 MHz, intermediate frequency: 1700 - 2700 MHz, high frequency: 3300 - 4200 MHz. Among them, the frequency range of the first antenna 1 is 700 - 960 Hz, and its size (AC section) is close to a quarter wavelength of the operating frequency, which is the core radiation unit of the antenna device. The end C of the first antenna 1 is directly connected to the whole machine ground to form an IFA antenna operating in the quarter-wavelength mode. The second antenna 2 operates in the intermediate frequency or high-frequency band, and its frequency range is 1700 - 2700 MHz or 3300 - 4200 MHz. Its size (EG) is close to a quarter wavelength of the intermediate frequency or high-frequency operating frequency. The point F is the feeding point of the second antenna 2, and the end G of the second antenna 2 is directly connected to the whole machine ground to form an IFA antenna operating in the quarter-wavelength mode.
[0055] Combined with some of the foregoing embodiments, since the first antenna 1 corresponds to a low-frequency signal, its size is longer (the wavelength of the low-frequency signal is longer), and it is easier to have two feeding points and implement the foregoing scheme of distinguishing feeding points according to signal power. Moreover, the transmission power of the low-frequency signal is higher, and the corresponding antenna switch voltage is also higher, so the demand for step-down of the antenna switch is also higher. Therefore, after the first antenna 1 is arranged with two feeding points according to the foregoing embodiment, the step-down benefit is greater. The step-down requirement of the antenna switch corresponding to the second antenna 2 is lower, and no special design is required, and the structure of the high-frequency antenna in the prior art can be referred to.
[0056] In some embodiments not shown, the second antenna 2 may also be provided with multiple feeding points to reduce the voltage of the corresponding antenna switch. In some embodiments not shown, the first antenna 1 may also be provided with a larger number of feeding points, such as three, five, six, etc. Correspondingly, through software or hardware restrictions, at most only one feeding point is allowed to be in the working state. In this way, the signals of each frequency band can be more accurately adapted.
[0057] As Figure 2 In some of the embodiments shown, an isolated ground 3 connected to the whole machine ground is provided in the slot M. The first antenna 1 is separated from the isolated ground 3 by a preset distance, and the second antenna 2 is separated from the isolated ground 3 by a preset distance. The isolated ground 3 is a conductor and is electrically connected to the whole machine ground, and is used to increase the isolation effect between the first antenna 1 and the second antenna 2 and reduce the mutual interference between the two antennas. In some embodiments, the isolated ground 3 and the whole machine ground are different parts of the same metal material, and the isolated ground 3 can be understood as a structure protruding from the whole machine ground and extending into the slot M. In other embodiments, the isolated ground 3 is an independent conductor and is installed and electrically connected to the whole machine ground by means of welding, bolts, plugging, etc.
[0058] In some specific embodiments, the preset distance between the first antenna 1, the second antenna 2 and the isolated ground 3 is 0.8 mm - 2.5 mm, such as any one of 0.8 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.5 mm. In some embodiments, the distances between the first antenna 1, the second antenna 2 and the isolated ground 3 are the same. In other embodiments, the distances between the first antenna 1, the second antenna 2 and the isolated ground 3 are different. If the distance width between the first antenna 1, the second antenna 2 and the isolated ground 3 is too small, the antenna radiation performance will be reduced and the use effect will be affected. If the width is too large, the appearance of the whole machine will be affected, and compatibility needs to be considered.
[0059] Some embodiments of the present application also provide an electronic product, including the antenna device in any of the above parts. For the technical features and technical effects thereof, please refer to the foregoing description.
[0060] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, orientations, positions, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, orientations, positions, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0061] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.
Claims
1. An antenna device, characterized in that: include: A first antenna, wherein the first antenna is provided with a first feeding point and a second feeding point at different distances from the open end thereof; An antenna switch, wherein the antenna switch is connected to the first feeding point and the second feeding point to form pathways respectively, and when one of the first feeding point and the second feeding point is in a working state, the other is in a disconnected state.
2. The antenna device according to claim 1, characterized in that The distance between the first feeding point and the open end is smaller than the distance between the second feeding point and the open end; and Signals with a power higher than a preset power threshold use the path formed by the second feeding point, and signals with a power lower than the preset power threshold use the path formed by the first feeding point.
3. The antenna device according to claim 2, characterized in that The first feeding point is adjacent to the open end, and the second feeding point is close to or located at a middle position of the antenna device.
4. The antenna device according to claim 1, characterized in that: Also includes: A switching switch, wherein an output end of the switching switch is electrically connected to the first feeding point and the second feeding point, and is used to switch between a working state and a disconnected state of the two; A main path capable of tuning a signal input to the antenna device; An input end of the switching switch is connected to the main path and the antenna switch, and a signal of the main path is transmitted to at least one of the first feeding point and the second feeding point via the switching switch.
5. The antenna device according to claim 4, characterized in that: It also includes a voltage divider inductor, an antenna switch, and an antenna matching circuit; wherein, The voltage-dividing inductor is connected between the antenna switch and the switching switch; The antenna switch is connected to ground through the antenna matching circuit; The main path includes an antenna matching circuit, and the antenna matching circuit is connected to the switching switch.
6. The antenna device according to claim 1, characterized in that: Also includes: a main path, capable of tuning a signal input to the antenna device, the main path being connected to the first feeding point and the second feeding point at the same time and transmitting the signal to at least one of them; A first antenna switch, used for switching the working state and disconnecting state of the first feeding point; The second antenna switch is used to switch the working state and the disconnecting state of the second feeding point.
7. The antenna device according to claim 6, characterized in that: The main path is connected to the first feeding point through a first antenna matching circuit, the first antenna switch is connected to the first feeding point through a first voltage divider inductor, and the first antenna switch is grounded through a first switch matching circuit; and / or, The main path is connected to the second feeding point through a second antenna matching circuit, the second antenna switch is connected to the second feeding point through a second voltage divider inductor, and the second antenna switch is grounded through a second switch matching circuit; and / or, A switch is connected between the first feeding point and the second feeding point, and the switch is used to switch between a working state and a disconnecting state of the two.
8. The antenna device according to any one of claims 1 to 7, characterized in that: It also includes a second antenna, the first antenna and the second antenna are isolated from each other by a fracture, and the ends of the first antenna and the second antenna located at the fracture constitute respective open circuit ends; The first antenna is a low-frequency antenna, and the second antenna is a high-frequency antenna.
9. The antenna device according to claim 8, characterized in that: An isolation ground is provided in the fracture, a preset distance is between the first antenna and the isolation ground, and a preset distance is between the second antenna and the isolation ground.
10. The antenna device according to claim 9, characterized in that: The preset distance between the first antenna and the isolation ground is 0.8 mm-2.5 mm; and / or, The preset distance between the second antenna and the isolation ground is 0.8 mm-2.5 mm.
11. The antenna device according to claim 9, characterized in that: The isolated ground and the whole machine ground are different parts of the same piece of metal material; or, The isolation ground is a conductor and is electrically connected to the whole machine ground.
12. An electronic product, characterized in that: The invention comprises the antenna device according to any one of claims 1 to 11.