Antenna and electronic device

Abstract

This application discloses an antenna and an electronic device, belonging to the field of antenna technology. The antenna includes: a first antenna branch and a second antenna branch; a first end of the first antenna branch is grounded; a second end of the first antenna branch is an open end; the first antenna branch is connected to a first feed port through a first matching circuit; the first end of the second antenna branch is an open end and is grounded through a first circuit; the second end of the second antenna branch is an open end and is connected to a first end of a first switching circuit; the second end of the first switching circuit is connected to a second feed port through a second matching circuit; a third end of the first switching circuit is grounded; the first switching circuit is used to connect the first end and the third end of the first switching circuit under a first standard; and to connect the first end and the second end of the first switching circuit under a second standard.

Description

Technical Field

[0001] This application belongs to the field of antenna technology, specifically relating to an antenna and an electronic device. Background Technology

[0002] The performance requirements for antennas in electronic devices are becoming increasingly demanding, leading to more complex structures. Designing antennas for electronic devices requires balancing the need to incorporate antennas across multiple frequency bands within a limited space with aesthetic considerations. This necessitates a comprehensive assessment of component selection, design complexity, and performance.

[0003] For electronic devices that support 5G, a dual-branch structure is often used in the design scheme of using a metal frame as an antenna, covering the MHB (Middle High Band) frequency band (which may include Band3, Band39, Band1, Band40 and Band41) and the NR (New Radio) frequency band (which may include Band78 and Band79). Figures 1 to 4 Four common dual-branch antenna structure schemes are shown in Table 1.

[0004] Table 1 Four dual-branch structure schemes

[0005]

[0006] The first power supply port 50 is used for powering the signal in the MHB band (which can be referred to as "MHB signal"); the second power supply port 60 is used for powering the signal in the NR band (which can be referred to as "NR signal").

[0007] In summary, existing antennas suffer from shortcomings in simultaneously achieving isolation, complicating the design of matching circuits, and improving antenna performance. Summary of the Invention

[0008] The purpose of this application is to provide an antenna and electronic device that can solve the problem of realizing a dual-branch antenna structure that takes into account the lack of isolation, has low design difficulty of matching circuit, and has good performance.

[0009] In a first aspect, embodiments of this application provide an antenna, including: a first antenna branch and a second antenna branch;

[0010] The first end of the first antenna branch is grounded; the second end of the first antenna branch is an open end; the first antenna branch is connected to the first feed port through a first matching circuit.

[0011] The distance between the first end of the second antenna branch and the second end of the first antenna branch is less than the distance between the second end of the second antenna branch and the second end of the first antenna branch; the first end of the second antenna branch is an open end and is grounded through the first circuit; the second end of the second antenna branch is an open end and is connected to the first end of the first switching circuit; the second end of the first switching circuit is connected to the second feed port through the second matching circuit; the third end of the first switching circuit is grounded.

[0012] The first switching circuit is used to connect the first terminal of the first switching circuit to the third terminal of the first switching circuit under a first system; and to connect the first terminal of the first switching circuit to the second terminal of the first switching circuit under a second system.

[0013] In a second aspect, embodiments of this application provide an electronic device comprising: the antenna described in the first aspect.

[0014] In the embodiments of this application, one end of the first antenna branch is grounded, and the other end is an open end. The first antenna branch is connected to the first feed port through a first matching circuit. Both ends of the second antenna branch are open ends. The end closer to the first antenna branch is grounded through a first circuit, and the other end farther from the first antenna branch is grounded through a first switching circuit or connected to the second feed port through a second matching circuit. The feeds for the MHB signal and the NR signal are located in two branches respectively, eliminating isolation issues. The matching circuit design is simpler and easier, and no combiner is needed in terms of RF devices. Under the first standard, the second antenna branch serves as an auxiliary to the first antenna branch and is excited to generate a current in the same direction as the first antenna branch, which can improve the antenna's performance in transmitting and receiving MHB signals. It can balance isolation, design difficulty, and antenna performance, and can realize a dual-branch antenna structure with no isolation issues, low matching circuit design difficulty, and good performance.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

[0017] Figure 1 This is one of the structural diagrams of antennas in the existing technology;

[0018] Figure 2 This is the second schematic diagram of an antenna structure in the existing technology;

[0019] Figure 3This is the third schematic diagram of an antenna structure in the existing technology;

[0020] Figure 4 This is the fourth schematic diagram of an antenna structure in the existing technology;

[0021] Figure 5 This is one of the structural schematic diagrams of an antenna according to an embodiment of this application;

[0022] Figure 6 This is a second schematic diagram of the antenna structure according to an embodiment of this application;

[0023] Figure 7 This is the third schematic diagram of the antenna structure according to an embodiment of this application;

[0024] Figure 8 This is the fourth schematic diagram of the antenna structure according to an embodiment of this application.

[0025] Figure label:

[0026] 10: First antenna branch; 20: Second antenna branch; 30: First matching circuit; 40: Second matching circuit; 50: First feed port; 60: Second feed port; 101: Matching circuit; 103: First end of the first antenna branch; 104: Second end of the first antenna branch; 201: First end of the second antenna branch; 202: Second end of the second antenna branch; 203: First circuit; 204: First switching circuit; 205: Second switching circuit; 206: First capacitor; 207: Second capacitor; 208: First sensor interface; 209: Second sensor interface; 210: Absorption rate sensor; 601: First branch; 701: Second branch. Detailed Implementation

[0027] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. The features described by the terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of those features. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two elements. Those skilled in the art can understand the specific meaning of the above term in this application based on the specific circumstances.

[0030] The following is combined with Figures 5-8 This application describes antennas and electronic devices according to embodiments thereof.

[0031] like Figure 5 As shown, an antenna according to some embodiments of this application includes: a first antenna branch 10 and a second antenna branch 20.

[0032] Optionally, the antenna has a dual-branch structure, including two branches: a first antenna branch 10 and a second antenna branch 20.

[0033] The first antenna branch 10 is used to transmit and receive MHB signals; the second antenna branch 20 is used to transmit and receive NR band signals and assists the first antenna branch 10 in transmitting and receiving MHB signals.

[0034] The first end 103 of the first antenna branch 10 is grounded; the second end 104 of the first antenna branch 10 is an open end; the first antenna branch 10 is connected to the first feed port 50 through the first matching circuit 30.

[0035] Optionally, the second end 104 of the first antenna branch 10 is open, and is therefore an open end.

[0036] The first feed port 50 is the MHB feed port, used for feeding the MHB signal. The first feed port 50 is connected to the first antenna branch 10 through the first matching circuit 30.

[0037] The distance between the first end 201 of the second antenna branch 20 and the second end of the first antenna branch 10 is less than the distance between the second end 202 of the second antenna branch 20 and the second end of the first antenna branch 10; the first end 201 of the second antenna branch 20 is an open end and is grounded through the first circuit 203; the second end 202 of the second antenna branch 20 is an open end and is connected to the first end of the first switching circuit 204; the second end of the first switching circuit 204 is connected to the second feed port 60 through the second matching circuit 40; the third end of the first switching circuit 204 is grounded.

[0038] Optionally, both the first end 201 and the second end 202 of the second antenna branch 20 are open ends, which can be referred to as break 1 and break 2. The first end 201 of the second antenna branch 20 is close to the open end 104 of the first antenna branch 10, and the first end 201 of the second antenna branch 20 is opposite to the second end 104 of the first antenna branch 10; while the second end 202 of the second antenna branch 20 is far away from the first antenna branch 10.

[0039] The first end 201 of the second antenna branch 20 can be grounded through the first circuit 203. The first circuit 203 can be implemented in any suitable circuit form, and the specific structure of the first circuit 203 is not limited in the embodiments of this application.

[0040] The second end 202 of the second antenna branch 20 does not use a fixed grounding method, but uses a multiplexing switch circuit. It is grounded through the first switch circuit 204, or connected to the second feed port 60 through the first switch circuit 204 and the second matching circuit 40.

[0041] The second power supply port 60 is the NR power supply port, used for powering the NR signal.

[0042] The first switching circuit 204 may include a first terminal, a second terminal, and at least one third terminal. The first terminal of the first switching circuit 204 is connected to the second terminal 202 of the second antenna branch 20. The second terminal of the first switching circuit 204 is connected to the second feed port 60 via a second matching circuit 40. Each third terminal of the first switching circuit 204 can be grounded via any suitable circuit.

[0043] Depending on the situation, the first switching circuit 204 can, based on the signal sent by the controller, choose to connect its first terminal to its second terminal, so that the second terminal 202 of the second antenna branch 20 is connected to the second power supply port 60 through the second matching circuit 40; or, choose to connect its first terminal to one of its third terminals, so that the second terminal 202 of the second antenna branch 20 is grounded.

[0044] The first switching circuit 204 is used to connect the first terminal of the first switching circuit 204 to the third terminal of the first switching circuit 204 in a first system; and to connect the first terminal of the first switching circuit 204 to the second terminal of the first switching circuit 204 in a second system.

[0045] Optionally, the first standard refers to the standard by which the electronic device equipped with the antenna operates in the MHB band and transmits and receives MHB signals.

[0046] When the electronic device equipped with the antenna is operating in the first mode, the first switching circuit 204 can select to connect its first terminal and its third terminal based on the signal sent by the controller of the electronic device. The first terminal 201 of the second antenna branch 20 and the second terminal 202 of the second antenna branch 20 are both grounded as an auxiliary to the first antenna branch 10. The second antenna branch 20 is excited to generate a current in the same direction as the first antenna branch 10, which can improve the performance of the antenna in transmitting and receiving MHB signals and improve the radiation efficiency of MHB signals.

[0047] The second standard refers to the standard in which electronic devices equipped with this antenna operate in the NR band and transmit and receive NR signals.

[0048] When the electronic device equipped with this antenna operates in the second standard, the first switching circuit 204 can select to connect its first terminal and its second terminal based on the signal sent by the controller of the electronic device. This enables the second terminal 202 of the second antenna branch 20 to be connected to the second feed port 60 through the second matching circuit 40. The second antenna branch 20 is equivalent to an inverted-F antenna (IFA) with the break 1 grounded and the break 2 fed, and can transmit and receive MHB signals. Since the first antenna branch 10, which serves as the transmitting and receiving antenna for MHB signals, and the second antenna branch 20, which serves as the transmitting and receiving antenna for NR signals, are structurally in the form of a break-to-ground connection, the isolation between the first feed port 50 and the second feed port 60 is good, eliminating the need for additional decoupling design and reducing the design difficulty of the antenna.

[0049] According to the antenna of the embodiment of this application, one end of the first antenna branch is grounded and the other end is an open end. The first antenna branch is connected to the first feed port through a first matching circuit. Both ends of the second antenna branch are open ends. The end closer to the first antenna branch is grounded through a first circuit, and the other end farther from the first antenna branch is grounded through a first switching circuit or connected to the second feed port through a second matching circuit. The feed for the MHB signal and the feed for the NR signal are located in two branches respectively, so there is no isolation problem. The design difficulty of the matching circuit is low and easier. There is no need to use a combiner in terms of radio frequency devices. In the first standard, the second antenna branch serves as an auxiliary to the first antenna branch and is excited to generate a current in the same direction as the first antenna branch, which can improve the performance of the antenna in transmitting and receiving MHB signals. It can balance isolation, design difficulty and antenna performance, and realize a dual-branch structure antenna with no isolation problem, low design difficulty of matching circuit and good performance.

[0050] Optionally, such as Figure 6 As shown, in some embodiments of the present application, when the number of the third terminals of the first switching circuit 204 is one, the first circuit 203 includes a second switching circuit 205.

[0051] Optionally, the number of third terminals of the first switching circuit 204 can be one. When the electronic device equipped with the antenna is operating in the second standard, the first switching circuit 204 can select to connect its first terminal and its third terminal based on the signal sent by the controller of the electronic device, so as to ground the second terminal 202 of the second antenna branch 20.

[0052] Optionally, the third terminal of the first switching circuit 204 can be grounded through a capacitor and / or an inductor.

[0053] Alternatively, the first circuit 203 can also be a multiplexer circuit, i.e., a second switch circuit 205.

[0054] The first terminal of the second switching circuit 205 is connected to the first terminal 201 of the second antenna branch 20; the second switching circuit 205 has multiple second terminals; any two second terminals of the second switching circuit 205 are grounded through different first branches 601.

[0055] Optionally, the second switching circuit 205 may include a first terminal and multiple second terminals. The first terminal of the second switching circuit 205 is connected to the first terminal 201 of the second antenna branch 20. Each second terminal of the second switching circuit 205 can be grounded through the first branch 601.

[0056] The second terminal of the second switching circuit 205 corresponds one-to-one with the first branch 601. The first branch 601 can be any applicable circuit. Any two first branches 601 are different.

[0057] The two first branches 601 are different, which may include: the two first branches 601 include different electronic components, or the two first branches 601 include the same electronic components, but the connection relationship between the electronic components is different.

[0058] The difference in electronic components can include at least one difference in the type and parameters of the electronic components.

[0059] For example, when there are multiple first branches 601, one of the first branches 601 is denoted as first branch A, and the other first branch 601 is denoted as first branch B. When first branch A includes an inductor and first branch B includes a capacitor, the types of electronic components included in first branch A and first branch B are different, therefore first branch A and first branch B are different. When first branch A includes a 0.5pF (picofarad) capacitor and first branch B includes a 1pF capacitor, the types of electronic components included in first branch A and first branch B are the same, but the parameters of the electronic components (specifically, the capacitance values) are different, therefore first branch A and first branch B are different. When both first branch A and first branch B include the same inductor and the same capacitor, the inductor and capacitor in first branch A are connected in series, and the inductor and capacitor in first branch B are connected in parallel; the connection methods of the inductor and capacitor in first branch A and first branch B are different, therefore first branch A and first branch B are different.

[0060] The second switching circuit 205 is used to connect the first terminal of the second switching circuit 205 to a second terminal of the second switching circuit 205.

[0061] Optionally, depending on the situation, the second switching circuit 205 can select to connect its first terminal to one of its second terminals based on the signal sent by the controller, so that the first terminal 201 of the second antenna branch 20 is grounded through the first branch 601 corresponding to the second terminal.

[0062] Optionally, in the second standard, the electronic components included in the first branch 601 are selected based on the principle of having low impedance equivalent in the NR band. Optionally, the electronic components can be selected as capacitors with a capacitance value greater than a first preset value or inductors with an inductance value less than a second preset value, so as to be equivalent to 0Ω (ohms).

[0063] Both the first preset value and the second preset value can be set according to actual conditions. This application does not specifically limit the specific values ​​of the first preset value and the second preset value in its embodiments.

[0064] According to the antenna of the present application embodiment, the first end of the second antenna branch is connected to different first branches grounded through a second switching circuit. In the first system, the second antenna branch serves as an auxiliary to the first antenna branch and is excited to generate a current in the same direction as the first antenna branch, which can improve the performance of the antenna in transmitting and receiving MHB signals. In the second system, the feed of the MHB signal and the feed of the NR signal are located in two branches respectively, without isolation problems. The design difficulty of the matching circuit is low and easier. There is no need to use a combiner in terms of radio frequency devices, thus balancing isolation, design difficulty and antenna performance. It can realize a dual-branch structure antenna with no isolation problems, low design difficulty of the matching circuit and good performance.

[0065] Optionally, such as Figure 7 As shown, in some embodiments of the antenna according to this application, when there are multiple third terminals of the first switching circuit 204, any two third terminals of the first switching circuit 204 are grounded through different second branches 701; the first circuit 203 is an LC circuit.

[0066] Optionally, the number of third terminals of the first switching circuit 204 can be multiple. When the electronic device equipped with the antenna is operating in the second standard, the first switching circuit 204 can select to connect its first terminal to one of its third terminals based on the signal sent by the controller of the electronic device, so as to ground the second terminal 202 of the second antenna branch 20.

[0067] The first circuit 203 can directly use an LC circuit, that is, the first end 201 of the second antenna branch 20 is grounded through an LC circuit.

[0068] In the first mode, the LC circuit is inductive in the MHB band and has a high impedance.

[0069] Under the second standard, the LC circuit exhibits capacitive behavior and low impedance in the NR band, and is equivalent to a short circuit in the NR band.

[0070] The third terminal of the first switching circuit 204 corresponds one-to-one with the second branch 701. The second branch 701 can be any applicable circuit. Any two second branches 701 are different.

[0071] The two second branches 701 may be different, including: the two second branches 701 include different electronic components, or the two second branches 701 include the same electronic components, but the connection relationship between the electronic components is different.

[0072] Optionally, under the first standard, depending on the situation, the first switching circuit 204 can select to connect its first terminal to one of its third terminals based on the signal sent by the controller, so that the second terminal 202 of the second antenna branch 20 is grounded through the second branch 701 corresponding to the third terminal.

[0073] According to the antenna embodiments of this application, the first end of the second antenna branch is grounded through an LC circuit. In the first standard, the second end of the second antenna branch is connected to different second branches and grounded through a first switching circuit. In the first standard, the second antenna branch, as an auxiliary to the first antenna branch, is excited to generate a current in the same direction as the first antenna branch, which can improve the performance of the antenna in transmitting and receiving MHB signals. In the second standard, the feed for the MHB signal and the feed for the NR signal are located in two branches respectively, eliminating isolation issues. The design difficulty of the matching circuit is lower and easier, and no combiner is needed in terms of RF devices. Thus, isolation, design difficulty, and antenna performance can be balanced, achieving a dual-branch antenna structure with no isolation issues, low design difficulty of the matching circuit, and good performance. Furthermore, the embodiments of this application use only one switching circuit, which is a more economical approach, and the antenna circuit structure is simpler.

[0074] Optionally, such as Figure 8 As shown, in some embodiments of the antenna according to this application, the first end 201 of the second antenna branch 20 is connected to the first end of the second switching circuit 205 through a first capacitor 206; the second end 202 of the second antenna branch 20 is connected to the first end of the first switching circuit 204 through a second capacitor 207.

[0075] Optionally, in Figure 6 Based on the antenna shown, a first capacitor 206 can be added between the first end 201 of the second antenna branch 20 and the first end of the second switching circuit 205, and a second capacitor 207 can be added between the second end 202 of the second antenna branch 20 and the first end of the first switching circuit 204.

[0076] The first capacitor 206 and the second capacitor 207 can be selected with appropriate capacitance values ​​to achieve high impedance at low frequencies and low impedance at high frequencies.

[0077] A first sensor interface 208 is provided between the first capacitor 206 and the first end 201 of the second antenna branch 20; a second sensor interface 209 is provided between the second capacitor 207 and the second end 202 of the second antenna branch 20; the first sensor interface 208 or the second sensor interface 209 is connected to the specific absorption rate sensor 210.

[0078] Optionally, the specific absorption rate sensor (SAR sensor) 210 can be connected between the capacitor and the switching circuit.

[0079] Specific Absorption Ratio (SAR) refers to the amount of electromagnetic radiation energy absorbed by a unit mass of matter per unit time. Internationally, SAR values ​​are commonly used to measure the thermal effect of terminal radiation. Generally speaking, the higher the antenna's Total Radiated Power (TRP), the greater the SAR.

[0080] Optionally, the specific absorption rate sensor 210 can be connected to a first sensor interface 208 provided between the first capacitor 206 and the first end 201 of the second antenna branch 20, or to a second sensor interface 209 provided between the second capacitor 207 and the second end 202 of the second antenna branch 20.

[0081] The first capacitor 206 or the second capacitor 207 can be used as the sensing element of the specific absorption rate sensor 210.

[0082] The signal of the specific absorption rate sensor 210 is a low-frequency signal. When the specific absorption rate sensor 210 is connected to the first sensor interface 208, the high impedance of the first capacitor 206 can isolate the signal of the specific absorption rate sensor 210 from the second switching circuit 205 and its downstream circuit (e.g., the first branch 601). When the specific absorption rate sensor 210 is connected to the second sensor interface 209, the high impedance of the second capacitor 207 can isolate the signal of the specific absorption rate sensor 210 from the first switching circuit 204 and its downstream circuit (e.g., the second branch 701 or the second matching circuit 40).

[0083] According to the antenna of the present application embodiment, by setting a first capacitor and a second capacitor, the specific absorption rate sensor 210 is connected to a first sensor interface set between the first capacitor and the first end of the second antenna branch, or connected to a second sensor interface set between the second capacitor and the second end of the second antenna branch, so that the first capacitor or the second capacitor is compatible as the sensing element of the specific absorption rate sensor, and more functions can be realized in a limited design space.

[0084] Optionally, each first branch 601 includes at least one inductor or at least one capacitor.

[0085] Optionally, each first branch 601 may include at least one inductor or at least one capacitor.

[0086] According to the antenna of the present application embodiment, by forming a first branch with at least one inductor or at least one capacitor, it is possible to achieve the following in the first system: the second antenna branch serves as an auxiliary to the first antenna branch and is excited to generate a current in the same direction as the first antenna branch, which can improve the performance of the antenna in transmitting and receiving MHB signals. In the second system, the feed of the MHB signal and the feed of the NR signal are located in two branches respectively, without isolation problems. The design difficulty of the matching circuit is low and easier. There is no need to use a combiner in terms of radio frequency devices, thus balancing isolation, design difficulty and antenna performance. It can realize a dual-branch structure antenna with no isolation problems, low design difficulty of the matching circuit and good performance.

[0087] Optionally, each second branch 701 includes at least one inductor or at least one capacitor.

[0088] Optionally, each second branch 701 may include at least one inductor or at least one capacitor.

[0089] According to the embodiments of this application, by forming a second branch with at least one inductor or at least one capacitor, the second antenna branch can be used as an auxiliary to the first antenna branch in the first system, and is excited to generate a current in the same direction as the first antenna branch, which can improve the performance of the antenna in transmitting and receiving MHB signals. In the second system, the feed of the MHB signal and the feed of the NR signal are located in two branches respectively, without isolation problems. The design difficulty of the matching circuit is low and easier. There is no need to use a combiner in terms of radio frequency devices, thus balancing isolation, design difficulty and antenna performance. It can realize a dual-branch structure antenna with no isolation problems, low design difficulty of the matching circuit and good performance.

[0090] Alternatively, the LC circuit includes a capacitor and an inductor connected in series.

[0091] Alternatively, an LC circuit can consist of a capacitor and an inductor connected in series. This LC circuit can be called an LC series circuit.

[0092] Optionally, the LC circuit can consist of a capacitor and an inductor connected in series, so that the first end 201 of the second antenna branch 20 is grounded through the inductor and capacitor.

[0093] According to the antenna of the present application embodiment, the first end of the second antenna branch is grounded through an LC circuit series circuit. Under the first standard, the second antenna branch serves as an auxiliary to the first antenna branch and is excited to generate a current in the same direction as the first antenna branch, which can improve the performance of the antenna in transmitting and receiving MHB signals. Under the second standard, the feed of the MHB signal and the feed of the NR signal are located in two branches respectively, without isolation problems. The design difficulty of the matching circuit is low and easier. There is no need to use a combiner in terms of radio frequency devices, thus balancing isolation, design difficulty and antenna performance. It can realize a dual-branch structure antenna with no isolation problems, low design difficulty of the matching circuit and good performance.

[0094] Optionally, the resonant frequency of the LC circuit is located between the MHB band and the NR band.

[0095] Optionally, the resonant frequency of the LC circuit is located between MHB and NR, so that the LC circuit is inductive with high impedance in the MHB band and capacitive with low impedance in the NR band, which is equivalent to a short circuit in the NR band.

[0096] According to the antenna of the present application embodiment, the resonant frequency of the LC circuit is located between the MHB band and the NR band. In the first mode, the second antenna branch serves as an auxiliary to the first antenna branch and is excited to generate a current in the same direction as the first antenna branch, which can improve the antenna's performance in transmitting and receiving MHB signals. In the second mode, the feed for the MHB signal and the feed for the NR signal are located in two branches respectively, eliminating isolation issues. The design difficulty of the matching circuit is low and easier, and no combiner is required in terms of radio frequency devices. Thus, it can balance isolation, design difficulty, and antenna performance, and realize a dual-branch antenna structure with no isolation issues, low design difficulty of the matching circuit, and good performance.

[0097] Optionally, in the first mode, the resonant frequency of the second antenna branch 20 is higher than the resonant frequency of the first antenna branch 10.

[0098] Optionally, by selecting appropriate parameter values ​​for electronic components, it can be achieved that, under the first standard, the resonant frequency of the second antenna branch 20 is higher than the resonant frequency of the first antenna branch 10.

[0099] The electronic components mentioned above may include the electronic components included in the first branch 601 or the electronic components included in the second branch 701.

[0100] Optionally, in the first mode, the resonant frequency of the second antenna branch 20 is slightly higher than the resonant frequency of the first antenna branch 10, so as to better excite the current in the second antenna branch 20 in the same direction as the first antenna branch 10, thereby improving the radiation efficiency of the MHB signal.

[0101] According to the antenna of the present application embodiment, under the first standard, the resonant frequency of the second antenna branch 20 is higher than the resonant frequency of the first antenna branch 10, which can better realize that under the first standard, the second antenna branch, as an auxiliary to the first antenna branch, is excited to generate a current in the same direction as the first antenna branch, thereby improving the performance of the antenna in transmitting and receiving MHB signals.

[0102] Optionally, an electronic device according to some embodiments of this application includes an antenna as described in any of the above embodiments. The structure and function of the antenna can be referred to in the above embodiments, and will not be repeated here.

[0103] Since the antenna in the above embodiments is used, the electronic device provided in this application has all the effects of the antenna described above. To avoid repetition, it will not be described again here.

[0104] Alternatively, the electronic device can be an electronic device that supports 5G communication.

[0105] Optionally, the electronic device can be implemented in various forms. For example, the electronic device described in the embodiments of this application may include mobile terminals such as mobile phones, smartphones, laptops, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), navigation devices, smart bracelets, smartwatches, digital cameras, etc., as well as fixed terminals such as desktop computers, televisions, etc.

[0106] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0107] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An antenna, characterized in that, include: First antenna branch and second antenna branch; The first end of the first antenna branch is grounded; The second end of the first antenna branch is an open end; The first antenna branch is connected to the first feed port through a first matching circuit; The distance between the first end of the second antenna branch and the second end of the first antenna branch is less than the distance between the second end of the second antenna branch and the second end of the first antenna branch; the first end of the second antenna branch is an open end and is grounded through a first circuit; the first circuit is an LC circuit, and the impedance characteristics of the LC circuit are different for different frequency bands; the second end of the second antenna branch is an open end and is connected to the first end of the first switching circuit; the second end of the first switching circuit is connected to the second feed port through a second matching circuit; the third end of the first switching circuit is grounded. The first switching circuit is used to connect the first terminal of the first switching circuit to the third terminal of the first switching circuit under a first system; and to connect the first terminal of the first switching circuit to the second terminal of the first switching circuit under a second system.

2. The antenna according to claim 1, characterized in that, When the number of third terminals of the first switching circuit is one, the first circuit includes: a second switching circuit; The first terminal of the second switching circuit is connected to the first terminal of the second antenna branch; the second switching circuit has multiple second terminals; any two second terminals of the second switching circuit are grounded through different first branches. The second switching circuit is used to connect the first terminal of the second switching circuit to a second terminal of the second switching circuit.

3. The antenna according to claim 1, characterized in that, When there are multiple third terminals of the first switching circuit, any two third terminals of the first switching circuit are grounded through different second branches.

4. The antenna according to claim 2, characterized in that, The first end of the second antenna branch is connected to the first end of the second switching circuit through the first capacitor; The second end of the second antenna branch is connected to the first end of the first switching circuit through a second capacitor; A first sensor interface is provided between the first capacitor and the first end of the second antenna branch; A second sensor interface is provided between the second capacitor and the second end of the second antenna branch; The first sensor interface or the second sensor interface is connected to the specific absorption rate sensor.

5. The antenna according to claim 2 or 4, characterized in that, Each of the first branches includes at least one inductor or at least one capacitor.

6. The antenna according to claim 3, characterized in that, Each of the second branches includes at least one inductor or at least one capacitor.

7. The antenna according to claim 3 or 6, characterized in that, The LC circuit includes a capacitor and an inductor connected in series.

8. The antenna according to claim 7, characterized in that, The resonant frequency of the LC circuit is located between the MHB band and the NR band.

9. The antenna according to claim 1, characterized in that, In the first mode, the resonant frequency of the second antenna branch is higher than the resonant frequency of the first antenna branch.

10. An electronic device, characterized in that, include: The antenna according to any one of claims 1-9.

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