Antenna devices, electronic equipment and voltage control methods

Abstract

This application provides an antenna device, electronic device, and voltage control method. The antenna device includes a main radiator and a parasitic radiator; the parasitic radiator is coupled to the main radiator through a slot; the main radiator includes a first ground point and a feed point; the feed point is connected to a feed source; the parasitic radiator includes a second ground point and a first matching point; the first matching point is connected to a first matching circuit; the first matching circuit is used to adjust the resonant frequency of the parasitic radiator, so that the parasitic radiator and the main radiator generate at least two resonant frequencies in the same operating frequency band. Using the above antenna device can reduce the radiator voltage while ensuring antenna radiation performance, thus preventing the breakdown of devices such as antenna switches connected to the radiator.

Description

Technical Field

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

[0002] As mobile phones, tablets, and other electronic devices become increasingly prevalent in people's daily lives, the frequency bands they support are also constantly expanding. To support more frequency bands, antenna switches can be installed on the radiating element of the antenna in electronic devices, allowing the antenna to cover a wider range of frequencies. When the antenna is working, the voltage value is higher at points on the radiating element closer to the end.

[0003] When the voltage on the radiator is too high, it can easily break down or burn out the antenna switch. Summary of the Invention

[0004] This application provides an antenna device, electronic device, and voltage control method that can reduce the voltage of the main radiator of the antenna device while ensuring the radiation performance of the antenna, thereby preventing the breakdown of devices such as switching circuits connected to the main radiator.

[0005] In a first aspect, an antenna device is provided, the antenna device comprising a main radiator and a parasitic radiator; the parasitic radiator and the main radiator are coupled through a slot;

[0006] The main radiator includes a first grounding point and a feed point; the feed point is connected to the feed source;

[0007] The parasitic radiator includes a second grounding point and a first matching point; the first matching point is connected to a first matching circuit.

[0008] The first matching circuit is used to adjust the resonant frequency of the parasitic radiator so that the parasitic radiator and the main radiator generate at least two resonant frequencies in the same operating frequency band.

[0009] In a second aspect, an electronic device is provided, which includes the antenna device described in the first aspect.

[0010] Thirdly, a voltage control method is provided, wherein the electronic device described above in the second aspect includes:

[0011] Obtain the first voltage value of the parasitic radiator output by the first detection circuit in the antenna device;

[0012] The first matching circuit in the antenna device is controlled to reach the target matching state according to the first voltage value, so that the parasitic radiator and the main radiator generate at least two resonant frequencies within the same operating bandwidth.

[0013] Fourthly, an electronic device is provided, including the antenna device of the first aspect; the voltage control unit in the antenna device includes a memory and a processor, the memory storing a computer program, which, when executed by the processor, causes the processor to perform the steps of the voltage control method of the third aspect.

[0014] Fifthly, a computer-readable storage medium is provided, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the steps of the voltage control method described above.

[0015] The aforementioned antenna device, electronic device, and voltage control method include an antenna device comprising a main radiator and a parasitic radiator; the parasitic radiator is coupled to the main radiator via a gap; the main radiator includes a first grounding point and a feed point; the feed point is connected to a feed source; the parasitic radiator includes a second grounding point and a first matching point; the first matching point is connected to a first matching circuit; the first matching circuit is used to adjust the resonant frequency of the parasitic radiator, such that the parasitic radiator and the main radiator generate at least two resonant frequencies within the same operating frequency band. Because the antenna device includes a parasitic radiator, the parasitic radiator can share the radiated power of the main radiator, thereby reducing the radiated power on the main radiator. This allows the voltage on the main radiator to be lower than the breakdown voltage of devices such as antenna switches connected to the main radiator, preventing these devices from breaking down. Furthermore, since the first matching point on the parasitic radiator is connected to a first matching circuit in the antenna device, the resonant frequency of the parasitic radiator can be adjusted through the first matching circuit, allowing the parasitic radiator and the main radiator to generate at least two resonant frequencies within the same operating frequency band. In other words, the parasitic radiator and the main radiator can cooperate to complete the electromagnetic wave radiation within the operating frequency band without needing to reduce the radiated power of the antenna device. Even with a reduced voltage on the main radiator, the antenna's radiation performance can be guaranteed. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a diagram illustrating the application environment of the antenna device in one embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the antenna device in one embodiment of this application;

[0019] Figure 3This is a schematic diagram of the S-parameters of an antenna device in one embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the radiator voltage and radiation efficiency of an antenna device in one embodiment of this application;

[0021] Figure 5 This is a schematic diagram of the antenna device in one embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the antenna device in one embodiment of this application;

[0023] Figure 7 This is a schematic diagram of the antenna device in one embodiment of this application;

[0024] Figure 8 This is a schematic diagram of the antenna device in one embodiment of this application;

[0025] Figure 9 This is a schematic diagram of the antenna device in one embodiment of this application;

[0026] Figure 10 This is a schematic diagram of the antenna device in one embodiment of this application;

[0027] Figure 11 This is a schematic diagram of the antenna device in one embodiment of this application;

[0028] Figure 12 This is a schematic flowchart of a voltage control method in one embodiment of this application;

[0029] Figure 13 This is a structural block diagram of a voltage control device in one embodiment of this application;

[0030] Figure 14 This is a structural block diagram of an electronic device in one embodiment of this application. Attached image description:

[0032] 10. Main radiator; 20. Parasitic radiator; 30. Feed source; 40. First matching circuit;

[0033] 11. Feed point; 12. First grounding point;

[0034] 21. Second grounding point; 22. First matching point; 23. First voltage detection point;

[0035] 50. Voltage control unit; 60. First voltage detection circuit;

[0036] 41. First antenna switch; 42. First matching network; 43. Parameter adjustable element;

[0037] 61. First detection resistor; 62. First voltage detection chip;

[0038] 70. Second voltage detection circuit; 13. Second voltage detection point;

[0039] 80. Second antenna switch; 90. Second matching network; 14. Second matching point. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0041] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first voltage value may be referred to as a second voltage value, and similarly, a second voltage value may be referred to as a first voltage value. Both the first voltage value and the second voltage value are voltage values, but they are not the same voltage value.

[0042] To reduce the voltage on the radiator, a voltage detection circuit can be installed at the end of the radiator. When the voltage detection circuit detects that the voltage on the radiator is too high, it can reduce the power on the antenna radiator to lower the voltage value. However, this method can easily lead to a decrease in the antenna's radiation performance. Therefore, it is necessary to provide an antenna device that can both ensure the antenna's radiation performance and reduce the voltage of the main radiator, preventing the breakdown of components such as switching circuits connected to the main radiator.

[0043] The antenna device 100 provided in this application embodiment can be applied to electronic device 200. For example... Figure 1As shown, the aforementioned electronic device 200 can be a device with wireless transceiver capabilities, and can be, but is not limited to, a handheld or wearable device. The electronic device 200 can be a mobile phone, tablet computer, virtual reality (VR) terminal device, augmented reality (AR) terminal device, etc. The electronic device 200 can communicate and connect with other devices 300 via wireless transceiver capabilities. These other devices 300 can be network devices or other electronic devices. The aforementioned network devices can be devices with wireless transceiver capabilities, including but not limited to: NodeB base stations, evolved NodeB base stations, base stations in fifth-generation (5G) communication systems, base stations or network devices in future communication systems, access nodes in WiFi systems, wireless relay nodes, wireless backhaul nodes, near-field communication devices, etc.

[0044] In one embodiment, an antenna device is provided, such as Figure 2 As shown, the antenna device includes a main radiator 10 and a parasitic radiator 20; the parasitic radiator 20 is coupled to the main radiator 10 through a slot; the main radiator 10 includes a first ground point 12 and a feed point 11; the feed point 11 is connected to a feed source 30; the parasitic radiator 20 includes a second ground point 21 and a first matching point 22; the first matching point 22 is connected to a first matching circuit 40; the first matching circuit 40 is used to adjust the resonant frequency of the parasitic radiator 20, so that the parasitic radiator 20 and the main radiator 10 generate at least two resonant frequencies in the same operating frequency band.

[0045] The aforementioned antenna device can be an external antenna or a built-in antenna of the electronic device. When the antenna device is a built-in antenna, it can be a flexible printed circuit (FPC) antenna, a laser direct-structuring (LDS) antenna, or a printed direct-structuring (PDS) antenna; no limitation is made here. When the antenna device is an external antenna, the main radiator 10 and the parasitic radiator 20 in the antenna device can be the metal frame of the electronic device. The metal frame can be formed of stainless steel, aluminum, or other metal materials. The metal frame can surround the display screen of the electronic device. The metal frame can be the bottom frame, top frame, or side frame of the electronic device.

[0046] The main radiator 10 may include a feed point 11, which can be connected to the feed source 30. The main radiator 10 can radiate the electromagnetic wave signal output from the feed source 30 into free space. The main radiator 10 may also include other components such as a matching network. The matching network can be used to adjust the matching of the main radiator 10 so that the standing wave ratio and other parameters of the main radiator 10 meet the requirements. The main radiator 10 may include one or more radiating patches, which is not limited here. Under the excitation of the feed source 30, the main radiator 10 can operate in a quarter-wavelength mode, a three-quarter-wavelength mode, etc., which is not limited here. The main radiator 10 may also include a first ground point 12, which is connected to the reference ground.

[0047] The main radiator 10 and the parasitic radiator 20 can be spaced apart and coupled through a slot. When the antenna device is in the transmitting state, the main radiator 10 can receive the electromagnetic wave signal output by the feed 30; the parasitic radiator 20 can couple the electromagnetic wave signal on the main radiator 10 through the slot and radiate the electromagnetic wave signal into free space through the parasitic radiator 20. When the antenna device is in the receiving state, both the parasitic radiator 20 and the main radiator 10 can sense the electromagnetic wave signal. The parasitic radiator 20 can couple the electromagnetic wave signal to the main radiator 10 through the slot, so that the main radiator 10 can transmit the electromagnetic wave signal to the receiving device for processing.

[0048] The parasitic radiator 20 may include a second grounding point 21 and a first matching point 22. The parasitic radiator 20 can be connected to a reference ground through the second grounding point 21. The first matching point 22 can be connected to a first matching circuit 40.

[0049] The first matching point 22 can be located at the end of the parasitic radiator 20 or at other connections of the parasitic radiator 20, without limitation. The end of the parasitic radiator 20 can refer to the end of the parasitic radiator 20 closest to the main radiator 10. Optionally, the first matching circuit 40 can include multiple matching sub-circuits, and the different matching sub-circuits can be connected to the parasitic radiator 20 at different first matching points 22. The first matching circuit 40 can include integrated components such as capacitors and inductors, which can form different types of matching networks through series or parallel connections; or, the first matching circuit 40 can include matching branches; the type of the first matching circuit 40 is not limited here.

[0050] Under the tuning of the first matching circuit 40, the parasitic radiator 20 and the main radiator 10 can generate at least two resonant frequencies within the same operating frequency band. The operating frequency band is the frequency range of the electromagnetic wave signal output by the feed 30. The center frequency of the parasitic radiator 20 can correspond to the first resonant frequency, and the center frequency of the main radiator 10 can correspond to the second resonant frequency. When the first and second resonant frequencies are within the same operating frequency band, they can jointly radiate the electromagnetic wave signal output by the feed 30. The first resonant frequency can be higher or lower than the second resonant frequency, without limitation. The frequency deviation between the first and second resonant frequencies can be less than the operating bandwidth. For example, if the antenna device only includes the main radiator 10, and the radiated power of the antenna device is S, the voltage value on the main radiator 10 may reach V1, exceeding the breakdown voltage of the device connected to the main radiator 10. By adding the parasitic radiator 20 to the antenna device, the resonant frequencies of the main radiator 10 and the parasitic radiator 20 are located within the same operating frequency band. When the radiated power of the antenna device is still S, the parasitic radiator 20 can share part of the radiated power, so that the radiated power on the main radiator 10 is less than S and the voltage value is less than V1, thereby reducing the voltage value on the main radiator 10 to below the breakdown voltage of the device.

[0051] The aforementioned antenna device includes a parasitic radiator 20, which can share the radiated power of the main radiator 10, thereby reducing the radiated power of the main radiator 10. This ensures that the voltage on the main radiator 10 is lower than the breakdown voltage of devices such as antenna switches connected to the main radiator 10, preventing these devices from being damaged. Furthermore, since the first matching point 22 on the parasitic radiator 20 is connected to the first matching circuit 40, the resonant frequency of the parasitic radiator 20 can be adjusted through the first matching circuit 40, allowing the parasitic radiator 20 and the main radiator 10 to generate at least two resonant frequencies within the same operating frequency band. In other words, the parasitic radiator 20 and the main radiator 10 can cooperate to complete the electromagnetic wave radiation within the operating frequency band without needing to reduce the radiated power of the antenna device, thus ensuring the antenna's radiation performance even when the voltage of the main radiator 10 is reduced.

[0052] In one embodiment, the first resonant frequency of the parasitic radiator 20 may be higher than the second resonant frequency of the main radiator 10.

[0053] Taking the example where the electrical length of the main radiator 10 at the second resonant frequency is one-quarter wavelength, the second resonant frequency can be the frequency of the electromagnetic wave signal output by the feed 30. If the first resonant frequency of the parasitic radiator 20 is lower than the second resonant frequency, and the electrical length of the parasitic radiator 20 is one-quarter wavelength of the first resonant frequency, which is greater than one-quarter wavelength of the second resonant frequency, the electromagnetic wave signal at the second resonant frequency may generate induced currents in opposite directions on the parasitic radiator 20 and the main radiator 10. This could lead to amplitude cancellation between the electromagnetic wave signals radiated by the parasitic radiator 20 and the main radiator 10 at the second resonant frequency, affecting the radiation performance of the antenna device. If the first resonant frequency of the parasitic radiator 20 is higher than the second resonant frequency, and the electrical length of the parasitic radiator 20 is one-quarter wavelength of the first resonant frequency, which is less than one-quarter wavelength of the second resonant frequency, the electromagnetic wave signal at the second resonant frequency will not exhibit reverse current on the parasitic radiator 20 and the main radiator 10. Figure 3 The figure shows a schematic diagram of the S-parameters of an antenna device. Figure 3 The first resonant frequency is approximately 1 GHz, and the second resonant frequency is approximately 900 MHz; the initial antenna device without the parasitic radiator 20 has a corresponding resonant frequency of approximately 9400 MHz, which is between the first and second resonant frequencies. Figure 4 The voltage values ​​of the radiators in the above-mentioned antenna device are compared with those in the initial antenna device without parasitic antenna elements, and the radiation efficiency is also compared. The radiation efficiency can be represented by the system gain.

[0054] The first and second resonant frequencies can be located at opposite ends of the operating bandwidth. Optionally, the frequency interval between the first and second resonant frequencies is less than a preset frequency difference to ensure a balanced current distribution on the main radiator 10 and the parasitic radiator 20. This frequency interval is related to the degree of balance in the current distribution between the main radiator 10 and the parasitic radiator 20. The smaller the frequency interval, the greater the radiated power shared by the parasitic radiator 20, and the smaller the voltage on the main radiator 10.

[0055] In the aforementioned antenna device, the first resonant frequency of the parasitic radiator 20 is higher than the second resonant frequency of the main radiator 10, which can further improve the radiation performance of the antenna.

[0056] In one embodiment, such as Figure 5As shown, the antenna device further includes a voltage control unit 50. The parasitic radiator 20 also includes a first voltage detection point 23; the first voltage detection point 23 is connected to the input terminal of the first voltage detection circuit 60; the output terminal of the first voltage detection circuit 60 is connected to the voltage control unit 50; the first voltage detection circuit 60 is used to detect a first voltage value of the parasitic radiator 20; the voltage control unit 50 can be used to control the first matching circuit 40 to achieve a target matching state according to the first voltage value, so that the parasitic radiator 20 and the main radiator 10 generate at least two resonant frequencies in the same operating frequency band.

[0057] The aforementioned first voltage detection circuit 60 can be connected to the first voltage detection point 23 of the parasitic radiator 20 and the voltage control unit 50, respectively, and can be used to detect the first voltage value of the parasitic radiator 20. The aforementioned first voltage detection point 23 can be located at the end of the parasitic radiator 20, or between the first matching point 22 and the end of the parasitic radiator 20, or between the first matching point 22 and the second grounding point 21. The connection position of the first voltage detection circuit 60 is not limited here.

[0058] The first voltage detection circuit 60 described above can output the detected result to the voltage control unit 50. The first voltage detection circuit 60 may include a detection resistor and an operational amplifier. The detection resistor may include two detection resistors connected in series. One end of the detection resistor may be connected to the parasitic radiator 20, and the other end may be grounded. The input terminal of the operational amplifier may be connected to the series connection of the detection resistor, and the output terminal of the operational amplifier may be connected to the voltage control unit 50.

[0059] The voltage control unit 50 described above can be used to control the matching state of the first matching circuit 40 according to the first voltage value. After obtaining the first voltage value detected by the first detection circuit, the voltage control unit 50 can determine the matching state of the first matching circuit 40 corresponding to the first voltage value and define it as the target matching state. Optionally, the voltage control unit 50 can be used to control the first matching circuit 40 to be in different matching states, and obtain multiple first voltage values ​​output by the first detection circuit in different matching states, and further determine the target matching state according to the changes in the first voltage value. The control method for the target matching state is not limited here.

[0060] Under the aforementioned target matching state, the parasitic radiator 20 and the main radiator 10 generate at least two resonant frequencies within the same operating frequency band. The voltage control unit 50 can adapt to the frequency of the electromagnetic wave signal output by the feed source 30 and adjust the matching state of the first matching circuit 40.

[0061] The matching state of the first matching circuit 40 can be adjusted under voltage control. When the first matching circuit 40 switches between different matching states, it can be switched by a switch or by the parameter-adjustable element 43; no limitation is made here. In one implementation, such as... Figure 6 As shown, the first matching circuit 40 includes a first antenna switch 41. One end of the first antenna switch 41 is connected to the first matching point 22, and the other end of the antenna switch can be connected to multiple first matching networks 42 in a switchable manner. When the first antenna switch 41 is switched to different first matching networks 42, the first matching circuit 40 is in different matching states. The first matching network 42 can be composed of capacitors and inductors, and the integrated parameters of the corresponding capacitors and / or inductors in different first matching networks 42 can be different; for example, the capacitance value of the capacitor in one first matching network 42 is C1, and the capacitance value of the capacitor in another first matching network 42 is C2. The connection methods of the capacitors and inductors in different matching networks can also be different; for example, the capacitors and inductors in one first matching network 42 can be connected in series, and the capacitors and inductors in another first matching network 42 can be connected in parallel. The multiple first matching networks 42 can also be multiple matching branches, and the width and length of different matching branches can be different.

[0062] In one implementation, such as Figure 7 As shown, the first matching circuit 40 includes a parameter-adjustable element 43, which includes at least one of an adjustable capacitor, an adjustable inductor, and an adjustable resistor. When the integrated parameters of the adjustable element 43 are adjusted to different values, the first matching circuit 40 corresponds to different matching states. For example, the first matching circuit 40 may include an adjustable capacitor, and the voltage control unit 50 can control the capacitance value of the adjustable capacitor, causing the first matching circuit 40 to be in different matching states.

[0063] The antenna device described above includes a voltage control unit 50 and a first voltage detection circuit 60. The voltage control unit 50 can control the matching state with the first matching circuit 40 according to the first voltage value output by the first voltage detection circuit 60. When the matching state reaches the target matching state, the parasitic radiator 20 and the main radiator 10 generate at least two resonant frequencies in the same operating frequency band, which can reduce the voltage of the main radiator 10 while ensuring the radiation performance of the antenna device.

[0064] In one embodiment, the first voltage detection circuit 60 may include a first detection resistor 61 and a first voltage detection chip 62. For example... Figure 8As shown, one end of the first detection resistor 61 can be connected to the first voltage detection point 23; the other end of the first detection resistor 61 can be grounded; the first voltage detection chip 62 can be connected to one end and the other end of the first detection resistor 61 respectively, for detecting the voltage of the first detection resistor 61. The output terminal of the first voltage detection chip 62 can be connected to the voltage control unit 50, for sending the detected first voltage value to the voltage control unit 50.

[0065] The antenna device in this embodiment uses the first voltage detection circuit 60 described above, which can reduce the number of components in the first voltage detection circuit 60 and simplify the connection complexity of the first voltage detection circuit 60, so that the antenna device can be applied to compact electronic devices.

[0066] The structure of the antenna device has been described in the above embodiments. The following embodiments will explain how the voltage control unit 50 controls the first matching circuit 40 to be in a target matching state.

[0067] In one embodiment, the voltage control unit 50 can control the first matching circuit 40 to be in different matching states, and based on the multiple first voltage values ​​output by the first detection circuit in different matching states, the voltage control unit 50 can determine the maximum voltage value from the multiple first voltage values, and then determine the target matching state according to the matching state corresponding to the maximum voltage value.

[0068] The voltage control unit 50 can determine the target voltage value of the parasitic radiator 20 based on the maximum voltage value; the difference between the target voltage value and the maximum voltage value can be a preset voltage difference, or the ratio of the target voltage value to the maximum voltage value can be a preset voltage ratio. Furthermore, the voltage control unit 50 can search for multiple first voltage values ​​among multiple first voltage values ​​that are closest to the target voltage value, and then determine the matching state corresponding to the closest first voltage value as the target matching state.

[0069] The voltage control unit 50 can also determine a matching state close to the matching state corresponding to the maximum voltage value as the target matching state. Optionally, the voltage control unit 50 can be used to determine the matching state of the first matching circuit 40 corresponding to the maximum voltage value after it has been reduced as the target matching state.

[0070] In one implementation, the voltage control unit 50 can control the antenna switch to switch to different first matching networks 42 in a preset sequence, and control the first voltage detection circuit 60 to detect the first voltage value when the antenna switch is connected to different first matching networks 42. Under the aforementioned preset sequence, the first voltage value can continuously increase as the first matching network switches. Among multiple first voltage values, the voltage control unit 50 can determine the maximum voltage value. Further, the voltage control unit 50 can select the matching network with smaller capacitance or inductance from the two first matching networks 42 adjacent to the first matching network 42 corresponding to the maximum voltage value as the target matching network.

[0071] In one implementation, the first matching circuit 40 can be an adjustable capacitor. The voltage control unit 50 can control the capacitance value of the adjustable capacitor to increase incrementally, and can detect the first voltage value at different capacitance values. When the first voltage value reaches its maximum value, the current capacitance value is rolled back by one or more adjustment steps to achieve the target matching state.

[0072] In the aforementioned antenna device, the voltage control unit 50 traverses each matching state to enable the first matching circuit 40 to reach the target matching state, thereby more accurately adjusting the first resonant frequency to near the second resonant frequency, achieving the effect of reducing the voltage value of the main radiator 10, avoiding overvoltage breakdown of devices such as antenna switches connected to the main radiator 10, and ensuring the radiation performance of the antenna device.

[0073] In one embodiment, such as Figure 9 As shown, the main radiator 10 further includes a second voltage detection point 13, which is connected to the input terminal of the second voltage detection circuit 70. The output terminal of the second voltage detection circuit 70 is connected to the voltage control unit 50 and is used to detect the second voltage value of the main radiator 10.

[0074] The voltage control unit 50 can control the first matching circuit 40 to reach a target matching state based on the difference between the first voltage value and the second voltage value. Optionally, the voltage control unit 50 can be used to determine the matching state of the first matching circuit 40 as the target matching state when the difference is less than a preset threshold and the first voltage value is less than the second voltage value.

[0075] The voltage control unit 50 can acquire the first voltage value and the second voltage value, and calculate the difference between the first voltage value and the second voltage value. If the difference is greater than a preset threshold, the voltage control unit 50 can consider that the second resonant frequency of the main radiator 10 is significantly different from the first resonant frequency of the parasitic radiator 20, and can further adjust the matching state of the first matching circuit 40. The voltage control unit 50 can switch the antenna switch in the parasitic radiator 20 to another matching network, or adjust the capacitance value in the first matching circuit 40, etc. When the difference is less than the preset threshold, the first matching circuit 40 is considered to have reached the target matching state.

[0076] In the aforementioned antenna device, the voltage control unit 50 adjusts the matching state of the first matching circuit 40 by the difference between the first voltage value and the second voltage value, thereby quantitatively adjusting the second voltage value of the main radiator 10, reducing the first voltage value, and further ensuring the safety of each device in the main radiator 10.

[0077] In one embodiment, such as Figure 10 As shown, the main radiator 10 unit may further include a second matching point 14, which can be connected to a second antenna switch 80. The second antenna switch 80 is used to select different second matching networks 90, enabling the main radiator 10 to achieve multi-band coverage. The specific limitations of the second matching network 90 are the same as those of the first matching network 42, and will not be repeated here.

[0078] In one embodiment, such as Figure 11 As shown, an antenna device is provided, which includes a main radiator 10, a parasitic radiator 20, and a voltage control unit 50. The parasitic radiator 20 is coupled to the main radiator 10 through a slot.

[0079] The main radiator 10 includes a first grounding point 12, a feed point 11, and a second matching point 14; the feed point 11 is connected to the feed source 30; the first grounding point 12 is connected to the reference ground; the second matching point 14 is connected to the second antenna switch 80; the second antenna switch 80 is used to select different matching circuits.

[0080] The parasitic radiator 20 includes a second grounding point 21, a first matching point 22, and a first voltage detection point 23; the second grounding point 21 is connected to the reference ground.

[0081] The first matching point 22 is connected to the first matching circuit 40, which includes a first antenna switch 41. One end of the first antenna switch 41 is connected to the first matching point 22, and the other end of the first antenna switch 41 is connected to multiple first matching networks 42 in a switchable manner.

[0082] The first voltage detection point 23 is connected to the input terminal of the first voltage detection circuit 60; the output terminal of the first voltage detection circuit 60 is connected to the voltage control unit 50; the first voltage detection circuit 60 is used to detect the first voltage value of the parasitic radiator 20.

[0083] The voltage control unit 50 is used to control the first matching circuit 40 to reach the target matching state according to the first voltage value, so that the first resonant frequency of the parasitic radiator 20 is higher than the second resonant frequency of the main radiator 10, and the frequency interval between the first resonant frequency and the second resonant frequency is less than the preset frequency difference.

[0084] The implementation principle and technical effects of the above antenna device are described in the above embodiments, and will not be repeated here.

[0085] In one embodiment, an electronic device is provided, which includes the antenna device described in the above embodiment. The implementation principle and technical effects of the above electronic device are similar to those of the antenna device, and will not be repeated here.

[0086] In one embodiment, such as Figure 12 As shown, a voltage control method is provided, which can be applied to the electronic device in the above embodiments. The method includes:

[0087] S101. Obtain the first voltage value of the parasitic radiator output by the first detection circuit in the antenna device;

[0088] S102. Control the first matching circuit in the antenna device to reach the target matching state according to the first voltage value, so that the parasitic radiator and the main radiator generate at least two resonant frequencies within the same working bandwidth.

[0089] The voltage control method described above is similar in principle and technical effect to the electronic device described above, and will not be elaborated here.

[0090] It should be understood that, although Figure 12 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 12 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0091] In one embodiment, such as Figure 13As shown, a voltage control device is provided, which can be applied to the electronic device in the above embodiments. The device includes:

[0092] The acquisition module 100 is used to acquire the first voltage value of the parasitic radiator output by the first detection circuit in the antenna device;

[0093] The control module 200 is used to control the first matching circuit in the antenna device to reach the target matching state according to the first voltage value, so that the parasitic radiator and the main radiator generate at least two resonant frequencies within the same operating bandwidth.

[0094] The voltage control device described above is similar in principle and technical effect to the voltage control method described above, and will not be elaborated here.

[0095] The division of the various modules in the voltage control device described above is only for illustrative purposes. In other embodiments, the voltage control device can be divided into different modules as needed to complete all or part of the functions of the voltage control device described above.

[0096] For specific limitations regarding the voltage control device, please refer to the limitations on the voltage control method above, which will not be repeated here. Each module in the aforementioned voltage control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware or independently of the processor in a computer device, or stored in software in the memory of a computer device, so that the processor can call and execute the operations corresponding to each module.

[0097] Figure 14 This is a schematic diagram of the internal structure of an electronic device in one embodiment. The electronic device can be any terminal device such as a mobile phone, tablet computer, laptop computer, desktop computer, PDA (Personal Digital Assistant), POS (Point of Sales), in-vehicle computer, or wearable device. The antenna device in the above embodiment of the electronic device includes a voltage control unit that can include a processor and a memory connected via a system bus. The processor can include one or more processing units. The processor can be a CPU (Central Processing Unit) or a DSP (Digital Signal Processor), etc. The memory can include a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and a computer program. The computer program can be executed by the processor to implement a voltage control method provided in the following embodiments. The internal memory provides a cached operating environment for the operating system computer program in the non-volatile storage medium.

[0098] The various modules in the voltage control device provided in this application embodiment can be implemented in the form of a computer program. This computer program can run on a terminal or server. The program modules constituted by this computer program can be stored in the memory of an electronic device. When the computer program is executed by a processor, it implements the steps of the method described in the embodiments of this application.

[0099] This application also provides a computer-readable storage medium. One or more non-volatile computer-readable storage media containing computer-executable instructions, which, when executed by one or more processors, cause the processors to perform the steps of a voltage control method.

[0100] This application also provides a computer program product containing instructions that, when run on a computer, cause the computer to execute a voltage control method.

[0101] Any references to memory, storage, databases, or other media used in this application may include non-volatile and / or volatile memory. Non-volatile memory may include ROM (Read-Only Memory), PROM (Programmable Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), or flash memory. Volatile memory may include RAM (Random Access Memory), which is used as external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as SRAM (Static Random Access Memory), DRAM (Dynamic Random Access Memory), SDRAM (Synchronous Dynamic Random Access Memory), Double Data Rate DDR SDRAM (Double Data Rate Synchronous Dynamic Random Access Memory), ESDRAM (Enhanced Synchronous Dynamic Random Access Memory), SLDRAM (Sync Link Dynamic Random Access Memory), RDRAM (Rambus Dynamic Random Access Memory), and DRDRAM (Direct Rambus Dynamic Random Access Memory).

[0102] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An antenna device, characterized in that, The antenna device includes a main radiator, a parasitic radiator, and a voltage control unit; the parasitic radiator is coupled to the main radiator through a gap. The main radiator includes a first grounding point and a feed point; the feed point is connected to the feed source; The parasitic radiator includes a second grounding point and a first matching point; the first matching point is connected to a first matching circuit. The first matching circuit is used to adjust the resonant frequency of the parasitic radiator so that the parasitic radiator and the main radiator generate at least two resonant frequencies in the same operating frequency band; The parasitic radiator further includes a first voltage detection point; the first voltage detection point is connected to the input terminal of a first voltage detection circuit; the output terminal of the first voltage detection circuit is connected to the voltage control unit; the main radiator further includes a second voltage detection point; the second voltage detection point is connected to the input terminal of a second voltage detection circuit; the output terminal of the second voltage detection circuit is connected to the voltage control unit; The first voltage detection circuit is used to detect the first voltage value of the parasitic radiator; The second voltage detection circuit is used to detect the second voltage value of the main radiator; The voltage control unit is used to control the first matching circuit to reach the target matching state based on the difference between the first voltage value and the second voltage value, so that the parasitic radiator and the main radiator generate at least two resonant frequencies in the same operating frequency band.

2. The antenna device according to claim 1, characterized in that, The first resonant frequency of the parasitic radiator is higher than the second resonant frequency of the main radiator.

3. The antenna device according to claim 2, characterized in that, The frequency interval between the first resonant frequency and the second resonant frequency is less than a preset frequency difference, so as to make the current distribution on the main radiator and the parasitic radiator balanced.

4. The antenna device according to claim 1, characterized in that, The first voltage detection circuit includes a first detection resistor and a first voltage detection chip; one end of the first detection resistor is connected to the first voltage detection point; the other end of the first detection resistor is grounded; the first voltage detection chip is connected to one end and the other end of the first detection resistor respectively, and is used to detect the voltage of the first detection resistor.

5. The antenna device according to claim 1, characterized in that, The first matching circuit includes a first antenna switch; one end of the first antenna switch is connected to the first matching point, and the other end of the first antenna switch is switched to multiple first matching networks.

6. The antenna device according to claim 1, characterized in that, The first matching circuit includes a parameter-adjustable element, which includes at least one of an adjustable capacitor, an adjustable inductor, and an adjustable resistor.

7. The antenna device according to claim 1, characterized in that, The voltage control unit is used to control the first matching circuit to be in different matching states, and to acquire multiple first voltage values ​​output by the first voltage detection circuit in different matching states.

8. The antenna device according to claim 7, characterized in that, The voltage control unit is used to determine the maximum voltage value from the plurality of first voltage values, and to determine the target matching state according to the matching state corresponding to the maximum voltage value.

9. The antenna device according to claim 8, characterized in that, The voltage control unit is used to determine the matching state of the first matching circuit corresponding to the maximum voltage value after it has been pushed back as the target matching state.

10. The antenna device according to claim 1, characterized in that, The voltage control unit is used to determine the matching state of the first matching circuit as the target matching state when the difference is less than a preset threshold and the first voltage value is less than the second voltage value.

11. The antenna device according to any one of claims 1-3, characterized in that, The main radiator unit further includes a second matching point, which is connected to a second antenna switch; the second antenna switch is used to select different second matching networks, enabling the main radiator to achieve multi-band coverage.

12. An electronic device, characterized in that, The electronic device includes the antenna device according to any one of claims 1-11.

13. A voltage control method, characterized in that, Applied to the electronic device of claim 12; the method includes: Obtain the first voltage value of the parasitic radiator output by the first detection circuit in the antenna device; Obtain the second voltage value of the main radiator output by the second detection circuit in the antenna device; The first matching circuit in the antenna device is controlled to reach the target matching state based on the difference between the first voltage value and the second voltage value, so that the parasitic radiator and the main radiator generate at least two resonant frequencies within the same operating bandwidth.

14. An electronic device comprising an antenna device according to any one of claims 1-11; the voltage control unit in the antenna device comprising a memory and a processor, the memory storing a computer program, characterized in that, When the computer program is executed by the processor, the processor performs the steps of the voltage control method as described in claim 13.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the voltage control method as described in claim 13.

Images