Antenna structure and electronic equipment

Abstract

The invention relates to an antenna structure and electronic equipment. The antenna structure comprises a first radiator, the first radiator comprises a first tail end, a second tail end and a first upper frame point, the first tail end is used for forming a first breaking joint, and the second tail end is used for forming a second breaking joint; the first feed is electrically connected to the first upper frame point, and the first feed is used for feeding in an electric signal so as to excite the first radiator to cover a cellular communication frequency band; the second feed is electrically connected to the first upper frame point, the second feed is used for feeding in an electric signal to excite the first radiator to cover a satellite communication frequency band, and the first feed and the second feed are connected in parallel; and the first change-over switch comprises a first conduction state and a second conduction state, when the first change-over switch is in the first conduction state, the first feed is conducted with the first radiating body, and when the first change-over switch is in the second conduction state, the second feed is conducted with the first radiating body.

Description

Technical Field

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

[0002] Currently, with the development of satellite technology, the demand for satellite communication capabilities in electronic devices is gradually emerging. However, given the compact antenna layout of electronic devices, how to achieve compatibility between satellite antennas and cellular data antennas has become a pressing technical problem for researchers. Summary of the Invention

[0003] This disclosure provides an antenna structure and electronic device to address the shortcomings of related technologies.

[0004] According to a first aspect of the present disclosure, an antenna structure is provided, comprising:

[0005] A first radiator, the first radiator including a first end, a second end and a first upper frame point, the first end being used to form a first fracture, and the second end being used to form a second fracture.

[0006] A first feed, which is electrically connected to the first upper frame point, is used to feed in an electrical signal to excite the first radiator to cover the cellular communication frequency band.

[0007] The second feed is electrically connected to the first upper frame point. The second feed is used to feed in an electrical signal to excite the first radiator to cover the satellite communication frequency band. The first feed and the second feed are connected in parallel.

[0008] The first switching switch includes a first conducting state and a second conducting state. When it is in the first conducting state, the first power supply is connected to the first radiator. When it is in the second conducting state, the second power supply is connected to the first radiator.

[0009] Optionally, when in the second conduction state, the fundamental mode resonance frequency of the first radiator is greater than the satellite communication frequency band.

[0010] The antenna structure further includes a second radiator and a third radiator. The second radiator cooperates with the first end to form the first gap. The end of the second radiator away from the first radiator is grounded through a grounding structure. The third radiator cooperates with the second end to form the second gap. The third radiator covers cellular frequency band signals.

[0011] When the first switching switch is in the second conducting state, the third radiator is switched to the circuit ground state, and the third radiator is in the non-working state to act as a parasitic branch of the first radiator, thereby lowering the resonant frequency of the first radiator.

[0012] When the first switching switch is in the second conducting state, the first radiator and the second radiator are connected through a gap capacitor to increase the hybrid resonance mode. The frequency of the satellite communication band is located between the resonance frequency of the hybrid resonance mode and the resonance frequency of the first radiator.

[0013] Optionally, the third radiator includes a second upper frame point, and the antenna structure includes:

[0014] The first impedance element has one end grounded and the other end electrically connected to the second upper frame point;

[0015] A third switching switch is connected in series with the first impedance element;

[0016] The first switching switch is in the second conducting state, the third switching switch is conducting, and the third radiator is grounded through the first impedance element.

[0017] Optionally, the first radiator further includes a third upper frame point, the second radiator includes a fourth upper frame point, and the slit capacitor is electrically connected to the third upper frame point and the fourth upper frame point;

[0018] The antenna structure includes:

[0019] The second switching switch is connected in series with the gap capacitor. The first switching switch is in the second conducting state, and the second switching switch is conducting.

[0020] Optionally, the satellite communication frequency band includes a frequency range of 1980MHz-2010MHz and a frequency range of 2170MHz-2200MHz;

[0021] The resonant frequency of the first radiator is located near 2.6 GHz, and the resonant frequency of the hybrid resonant mode is located near 1.6 GHz.

[0022] Optionally, the slit capacitor is a capacitor, and the capacitance value of the capacitor is greater than 0 and less than or equal to 1pF.

[0023] Optionally, when in the first conduction state, the fundamental mode resonance of the first radiator covers the cellular communication frequency band.

[0024] Optionally, the fundamental mode resonance is the half-wavelength resonance mode of the first radiator.

[0025] Optionally, the length of the first radiator is in the range of 14mm-20mm, and the fundamental mode resonance of the first radiator covers the N78 frequency band.

[0026] Optionally, the first upper frame point is spaced at a preset distance from the second end, and the first upper frame point is set away from the first end. The monopole mode of the branch between the first upper frame point and the second end covers the N79 frequency band.

[0027] Optionally, it also includes a second radiator and a grounding structure, wherein the second radiator covers at least one low-frequency band signal, the second radiator cooperates with the first radiator to form the second gap, and the end of the second radiator away from the first radiator is grounded through the grounding structure.

[0028] When the first radiator is in the fundamental mode resonance, the second radiator is disconnected from the feed, and a branch of the first radiator near the second radiator and the second radiator form a loop resonance mode. The resonant frequency of the loop resonance mode is located between the resonant frequency of the fundamental mode resonance and the resonant frequency of the monopole mode.

[0029] Optionally, the length of the second radiator is in the range of 35mm-40mm.

[0030] Optionally, the antenna structure further includes:

[0031] A metal floor, wherein the first radiator is disposed on the outside of the metal floor and forms a solid clearance with the metal floor, and the clearance is connected to the first joint and the second joint respectively;

[0032] A SAR sensor, which is electrically connected to the first radiator.

[0033] Optionally, a fourth radiator is also included, wherein the extension direction of the fourth radiator is perpendicular to the extension direction of the first radiator, the fourth radiator is located on one side of the first radiator, and the fourth radiator and the first radiator cover the same satellite communication frequency band.

[0034] According to a second aspect of the present disclosure, an electronic device is provided, including an antenna structure as described in any of the above embodiments.

[0035] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0036] As can be seen from the above embodiments, in the technical solution of this disclosure, taking advantage of the fact that cellular communication and satellite communication are usually not coexisting, the signals fed by the first feed and the second feed respectively excite the first radiator to cover the cellular communication frequency band and the satellite communication frequency band, thereby realizing the reuse of the first radiator. At the same time, since the electrical signals are excited by different feeds, it is beneficial to simplify the matching circuit.

[0037] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0039] Figure 1 This is a schematic diagram of an antenna structure according to an exemplary embodiment.

[0040] Figure 2 yes Figure 1 A simplified schematic diagram of the radiators in the middle section.

[0041] Figure 3 This is a current distribution diagram of the 1 / 2 wavelength mode of the first radiator of an antenna structure according to an exemplary embodiment.

[0042] Figure 4 This is an efficiency curve of an antenna structure according to an exemplary embodiment.

[0043] Figure 5 This is a current distribution diagram of the monopole mode of the first radiator of an antenna structure according to an exemplary embodiment.

[0044] Figure 6 This is a current distribution diagram of the first radiator of an antenna structure according to an exemplary embodiment, when the resonant frequency is around 2.6 GHz.

[0045] Figure 7 This is a current distribution diagram of a hybrid resonant mode of an antenna structure according to an exemplary embodiment, when the resonant frequency is around 1.6 GHz.

[0046] Figure 8 This is another efficiency curve of an antenna structure according to an exemplary embodiment. Detailed Implementation

[0047] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0048] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0049] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0050] Figure 1 This is a schematic diagram illustrating an antenna structure according to an exemplary embodiment. Figure 2 yes Figure 1 A simplified schematic diagram of the relationship between the central radiators. (See diagram below.) Figure 1 and Figure 2 As shown, the antenna structure includes a first radiator 1, a second radiator 2, a third radiator 3, a first feed 4, a third feed 5, and a first switching switch 6. The first radiator 1 includes a first end 11, a second end 12, and a first upper frame point 13. The first end 11 can cooperate with the second radiator 2 to form a first gap, and the second end 12 can cooperate with the third radiator 3 to form a second gap. The first feed 4 is electrically connected to the first upper frame point 13, and an electrical signal is fed through the first feed 4 to excite the first radiator 1 to cover the cellular communication frequency band. The second feed 5 is electrically connected to the first radiator, and the electrical signal fed through the second feed 5 can excite the first radiator 1 to cover the satellite communication frequency band. The first feed 4 and the second feed 5 are connected in parallel.

[0051] The first switching switch 6 includes a first conducting state and a second conducting state. In the first conducting state, the first feeder 4 is connected to the first radiator 1, allowing the first radiator 1 to radiate cellular frequency band signals for conventional data communication. In the second conducting state, the second feeder 5 is connected to the first radiator 1, allowing the first radiator 1 to radiate satellite frequency band signals for satellite communication. For example, such as... Figure 2 As shown, the first switching switch 6 includes a first switch 61 and a second switch 62 connected in parallel. The first switch 61 is connected in series with the first power supply 4, and the second switch 62 is connected in series with the second power supply 5. When the first switch 61 is closed and the second switch 62 is open, the first switching switch 6 is in a first conducting state; when the first switch 61 is open and the second switch 62 is closed, the first switching switch 6 is in a second conducting state. Of course, this is only an illustrative example, and other structural forms of the first switching switch 6 can also be used to achieve the switching between the first conducting state and the second conducting state.

[0052] Based on this, in the technical solution disclosed herein, taking advantage of the fact that cellular communication and satellite communication are usually not coexisting, the first radiator 1 is excited by the signals fed in by the first feed 4 and the second feed 5 respectively to cover the cellular communication frequency band and the satellite communication frequency band, thereby realizing the reuse of the first radiator 1. At the same time, since the electrical signals are excited by different feeds, it is beneficial to simplify the matching circuit.

[0053] In this embodiment, when in the first conduction state, the fundamental mode resonance of the first radiator 1 covers the cellular communication frequency band, thereby avoiding higher-order modes and ensuring the radiation performance of the cellular communication frequency band. For example, the fundamental mode resonance can be a half-wavelength resonant mode of the first radiator 1, resulting in a single resonant mode and improved radiation efficiency. For example, the length of the first radiator 1 can be in the range of 14mm-20mm, thus enabling the half-wavelength resonant mode of the first radiator 1 to cover the N78 frequency band. Figure 3 The diagram shows the current distribution on the first radiator 1 in the 1 / 2 wavelength resonant mode. (See diagram for example.) Figure 4 As shown, the frequency at the first marked point is 3.5 GHz, and the Rad radiative efficiency and Tot radiative efficiency within the N78 band both reach above -1.3 dB.

[0054] Furthermore, the first upper frame point 13 and the second end point 12 are spaced apart by a preset distance, and the first upper frame point 13 is positioned away from the first end point 11. That is, it can be understood that the distance between the first upper frame point 13 and the second end point 12 is less than the distance between the first upper frame point 13 and the first end point. Figure 5 As shown, Figure 5The diagram shows the current distribution of the stubs between the first upper frame point 13 and the second end 12 when radiating the N79 frequency band. The N79 frequency band can be covered by the monopole mode between the first upper frame point 13 and the second end 12, thus extending the frequency band coverage of the first radiator 1.

[0055] The antenna structure also includes a grounding structure 7. The second radiator 2 covers at least one low-frequency band signal, for example, by feeding an electrical signal through a third feed that is electrically connected to the second radiator 2, thus enabling the second radiator 2 to cover the low-frequency band signal. The end of the second radiator 2 near the first end 11 forms a first gap with the first end 11, and the end of the second radiator 2 away from the first end 11 is grounded through the grounding structure 7. When the first radiator 1 is in fundamental mode resonance, the second radiator 2 is disconnected from the feed, meaning that the second radiator 2 will not be excited by the signal fed by the third feed; instead, the current generated through coupling with the first radiator 1 forms a loop resonance mode with the second radiator 2. Figure 5 As shown, the blue box area illustrates the current distribution forming the loop resonant mode stub. The resonant frequency of this loop resonant mode lies between the resonant frequency of the fundamental mode and the resonant frequency of the monopole mode. This avoids the efficiency dip of the loop resonant mode near its resonant frequency falling within the fundamental mode or monopole mode resonance, thus reducing the impact of the loop resonant mode on the efficiency of the fundamental mode and monopole mode. Figure 3 As shown, the frequency of the second marker point is 4.9 GHz. The Rad radiation efficiency and Tot radiation efficiency in the N79 band both reach above -2.45 dB. Although the efficiency is lower than that of the N78 band, it still maintains good radiation efficiency, ensuring normal communication of the antenna structure in the N79 band.

[0056] In order to make the resonant frequency of the loop resonant mode fall between the resonant frequency of the fundamental mode and the resonant frequency of the monopole mode, the resonant frequency of the loop resonant mode can be adjusted by adjusting the length of the second radiator 2. For example, the length of the second radiator 2 can be between 35mm and 40mm, so that the resonant frequency of the loop resonant mode falls near 4GHz, thus having a certain distance from both the N78 and N79 frequency bands. This can effectively allow the N78 and N79 frequency bands to avoid the efficiency dip of the loop resonant mode.

[0057] In the above embodiments, when in the second conduction state, the fundamental mode resonance frequency of the first radiator 1 is greater than the satellite communication frequency. For example, taking the fundamental mode resonance of the first radiator 1 covering the N78 frequency band as an example, the frequency of the N78 frequency band is much greater than the frequencies of the Tiantong satellite communication frequency band and the Beidou satellite communication frequency band. Therefore, it is necessary to lower the frequency of the first radiator 1 to cover the satellite communication frequency band. In some embodiments, the antenna structure further includes a second radiator 2 and a third radiator 3. The second radiator 2 covers at least one low-frequency band signal, for example, by feeding an electrical signal through a third feed that is electrically connected to the second radiator 2, so that the second radiator 2 covers the low-frequency band signal. The end of the second radiator 2 near the first end 11 cooperates with the first end 11 to form a first gap, and the end of the second radiator 2 away from the first end 11 is grounded through the grounding structure 7. The third radiator 3 cooperates with the second end 12 to form a second gap, and the third radiator 3 covers the cellular frequency band signal.

[0058] When the first switch 6 is in the second conducting state, the third radiator 3 is switched to the circuit ground state and is in a non-operating state to act as a parasitic branch of the first radiator 1, lowering the resonant frequency of the first radiator 1. When the first switch 6 is in the second conducting state, the first radiator 1 and the second radiator 2 are connected through the gap capacitor 9 to increase the hybrid resonant mode. The satellite communication frequency band is located between the resonant frequency of the hybrid resonant mode and the resonant frequency of the first radiator. In this way, the addition of the third radiator 3 can lower the resonant frequency, and the addition of the second radiator 2 through the gap capacitor 9 can increase a hybrid resonant mode, thereby widening the frequency band and facilitating the full coverage of the satellite communication frequency band.

[0059] For example, regarding the grounding of the third radiator 3, the antenna structure also includes a first impedance element 8 and a third switching switch 15. One end of the first impedance element 8 is grounded, and the other end is electrically connected to the second upper frame point 31. The third switching switch 15 is connected in series with the first impedance element 8, and the conduction state between the first impedance element 8 and the third radiator 3 can be switched through the third switching switch 15. When the first switching switch 6 is in the second conduction state, the third switching switch 15 is turned on, and the third radiator 3 is grounded through the first impedance element 8.

[0060] Regarding the electrical connection between the second radiator 2 and the first radiator 1 via the slot-crossing capacitor 9, for example, the first radiator 1 further includes a third upper frame point 14, the second radiator 2 includes a fourth upper frame point 21, and the third radiator 3 includes a second upper frame point 31. The antenna structure also includes a second switching switch 10, which is connected in series with the slot-crossing capacitor 9 and can switch the conduction state of the slot-crossing capacitor 9. For example, when the second switching switch 10 is closed, the first radiator 1 and the second radiator 2 are electrically connected through the slot-crossing capacitor 9; when the second switching switch 10 is open, the first radiator 1 and the second radiator 2 are disconnected. The slot-crossing capacitor 9 is a capacitor with a capacitance value greater than 0 and less than or equal to 1 pF. The first impedance element 8 includes a capacitor or an inductor.

[0061] Taking the half-wave mode of the first radiator 1 as the fundamental mode resonance, with the resonant frequency near the N78 band as an example, assuming the satellite communication band is located in the 1980MHz-2010MHz and 2170MHz-2200MHz bands, when the first switch 6 is in the second conducting state, the satellite communication band frequency is much lower than the 3.4GHz-3.6GHz of the N78 band. Therefore, when the first switch 6 is in the second conducting state, the third switch 15 can be switched to closed, making the third radiator 3 connected to the first impedance element 8. Moreover, since cellular communication and satellite communication are usually not simultaneous communication requirements, the third radiator 3 can be without an electrical signal, thus acting as a parasitic branch of the first radiator 1. Combined with the effect of the first impedance element 8, this lowers the resonant frequency of the first radiator 1. Of course, when the antenna structure is in data communication mode, the third switch 15 can be opened, and the third radiator 3 can be excited by the electrical signal fed into it by the connected feed.

[0062] Furthermore, when the first switching switch 6 is in the second conducting state, the second switching switch 10 is closed, and the first radiator 1 and the second radiator 2 are electrically connected through the gap capacitor 9. The second radiator 2 is used to increase the hybrid resonance mode. The satellite communication frequency band is located between the resonance frequency point of the hybrid resonance mode and the resonance frequency point of the first radiator. By increasing the hybrid resonance mode, the resonance frequency band of the first radiator 1 is widened, thereby achieving full coverage of the satellite communication frequency band.

[0063] For example, such as Figure 6 As shown, taking the satellite communication frequency band as the Tiantong communication frequency band as an example, when the third radiator 3 acts as a parasitic branch, the resonant frequency of the first radiator 1 can be lowered to around 2.6 GHz. Figure 6 The area shown in the blue box is the current distribution of the parasitic stub near 2.6 GHz. The resonant frequency of the hybrid resonant mode can be located near 1.6 GHz. Figure 7The area shown in the blue box represents the current distribution of the first radiator 1 and the second radiator 2 near 1.6 GHz. By closing the second switching switch 10, a resonance can be formed in front of 2.6 GHz using the second radiator 2, creating a dual-wave pattern, thereby widening the antenna bandwidth and achieving full coverage of the Tiantong frequency band. Figure 8 The efficiency curve of the antenna structure in the Tiantong state is shown. The red box area indicated by the red arrow is located in the frequency band of 2GHz-2.2GHz, which basically coincides with the Tiantong communication frequency band. It can be seen that the antenna structure maintains high Rad radiation efficiency and Tot radiation efficiency in this frequency band, which meets the communication requirements.

[0064] In particular, when the antenna structure is configured in an electronic device, and the first radiator 1, the second radiator 2, and the third radiator 3 are all located on the side of the electronic device, with the third radiator 3 being closer to the top of the electronic device, in the scenario of one-handed satellite communication, because the hand holds the second radiator 2, the current is concentrated towards the first radiator 1 and the third radiator 3, which is beneficial for the radiation pattern to face the zenith direction, thus improving performance. In the scenario of head-and-hand communication, the head blocks the third radiator 3, so that the radiation pattern, which originally faced the front and back of the screen in free space, becomes a radiation pattern that faces the back of the screen in the head-and-hand communication scenario. The radiation pattern is enhanced, the satellite communication performance is enhanced, and satellite communication is realized in the head-and-hand scenario.

[0065] In the above embodiments, the antenna structure also includes a metal floor 16 and a SAR sensor 17. The first radiator 1, the second radiator 2, and the third radiator 3 are all disposed on the outside of the metal floor 16, and the first radiator 1 and the metal floor 16 form a solid clearance. That is, there is no grounding structure connecting the metal floor 16 and the first radiator 1 within the solid clearance area. The absence of a grounding structure divides the clearance between the first radiator 1 and the metal floor 16 into several parts to achieve the suspension of the first radiator 1. That is, there are no metal parts around the first radiator 1 in contact with it. The solid clearance is connected to the first gap and the second gap, respectively. The SAR sensor 17 is electrically connected to the first radiator 1 to achieve SAR detection. Compared with the related technology, which does not have a suspended radiator, the SAR reduction scheme based solely on the input power can adjust the input power according to the detected SAR value to achieve precise SAR adjustment.

[0066] In the above embodiments, the antenna structure further includes a fourth radiator 18, whose extension direction is perpendicular to that of the first radiator 1. The fourth radiator 18 is located on one side of the first radiator 1, and both the fourth radiator 18 and the first radiator 1 are used to cover the communication frequency band of the same satellite, such as both covering the Tiantong satellite frequency band or both covering the Beidou satellite frequency band. Based on this, when the antenna structure is configured in an electronic device, the first radiator 1 can be placed on the side of the electronic device, and the fourth radiator 18 can be placed on the top of the electronic device, achieving centered radiation of satellite signals and supporting head-and-hand communication scenarios, thus achieving scenario complementarity.

[0067] Based on the technical solution of this disclosure, an electronic device is also provided, which may include the antenna structure described in any of the above embodiments. The first radiator 1, the second radiator 2, and the third radiator 3 may be part of a frame of the electronic device. The electronic device may include a mobile phone or a tablet device, etc.

[0068] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0069] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An antenna structure, characterized in that, include: A first radiator, the first radiator including a first end, a second end and a first upper frame point, the first end being used to form a first fracture, and the second end being used to form a second fracture. A first feed, which is electrically connected to the first upper frame point, is used to feed in an electrical signal to excite the first radiator to cover the cellular communication frequency band. The second feed is electrically connected to the first upper frame point. The second feed is used to feed in an electrical signal to excite the first radiator to cover the satellite communication frequency band. The first feed and the second feed are connected in parallel. The first switching switch includes a first conducting state and a second conducting state. When it is in the first conducting state, the first power supply is connected to the first radiator. When it is in the second conducting state, the second power supply is connected to the first radiator.

2. The antenna structure according to claim 1, characterized in that, When in the second conduction state, the fundamental mode resonance frequency of the first radiator is greater than the satellite communication frequency. The antenna structure further includes a second radiator and a third radiator. The second radiator cooperates with the first end to form the first gap. The end of the second radiator away from the first radiator is grounded through a grounding structure. The third radiator cooperates with the second end to form the second gap. The third radiator covers cellular frequency band signals. When the first switching switch is in the second conducting state, the third radiator is switched to the circuit ground state, and the third radiator is in the non-working state to act as a parasitic branch of the first radiator, thereby lowering the resonant frequency of the first radiator. When the first switching switch is in the second conducting state, the first radiator and the second radiator are connected through a gap capacitor to increase the hybrid resonance mode. The frequency of the satellite communication band is located between the resonance frequency of the hybrid resonance mode and the resonance frequency of the first radiator.

3. The antenna structure according to claim 2, characterized in that, The third radiator includes a second upper frame point, and the antenna structure includes: The first impedance element has one end grounded and the other end electrically connected to the second upper frame point; A third switching switch is connected in series with the first impedance element; The first switching switch is in the second conducting state, the third switching switch is conducting, and the third radiator is grounded through the first impedance element.

4. The antenna structure according to claim 2, characterized in that, The first radiator further includes a third upper frame point, the second radiator includes a fourth upper frame point, and the slit capacitor is electrically connected to the third upper frame point and the fourth upper frame point; The antenna structure includes: The second switching switch is connected in series with the gap capacitor. The first switching switch is in the second conducting state, and the second switching switch is conducting.

5. The antenna structure according to claim 4, characterized in that, The satellite communication frequency bands include a frequency range of 1980MHz-2010MHz and a frequency range of 2170MHz to 2200MHz; The resonant frequency of the first radiator is located near 2.6 GHz, and the resonant frequency of the hybrid resonant mode is located near 1.6 GHz.

6. The antenna structure according to claim 2, characterized in that, The slit capacitor is a capacitor, and the capacitance value of the capacitor is greater than 0 and less than or equal to 1pF.

7. The antenna structure according to claim 1, characterized in that, When in the first conduction state, the fundamental mode resonance of the first radiator covers the cellular communication frequency band.

8. The antenna structure according to claim 7, characterized in that, The fundamental mode resonance is the half-wavelength resonance mode of the first radiator.

9. The antenna structure according to claim 7, characterized in that, The length of the first radiator is in the range of 14mm-20mm, and the fundamental mode resonance of the first radiator covers the N78 frequency band.

10. The antenna structure according to claim 8, characterized in that, The first upper frame point is spaced at a preset distance from the second end, and the first upper frame point is set away from the first end. The monopole mode of the branch between the first upper frame point and the second end covers the N79 frequency band.

11. The antenna structure according to claim 10, characterized in that, It also includes a second radiator and a grounding structure. The second radiator covers at least one low-frequency band signal. The second radiator cooperates with the first radiator to form the second gap. The end of the second radiator away from the first radiator is grounded through the grounding structure. When the first radiator is in the fundamental mode resonance, the second radiator is disconnected from the feed, and a branch of the first radiator near the second radiator and the second radiator form a loop resonance mode. The resonant frequency of the loop resonance mode is located between the resonant frequency of the fundamental mode resonance and the resonant frequency of the monopole mode.

12. The antenna structure according to claim 11, characterized in that, The length of the second radiator is in the range of 35mm-40mm.

13. The antenna structure according to claim 1, characterized in that, The antenna structure also includes: A metal floor, wherein the first radiator is disposed on the outside of the metal floor and forms a solid clearance with the metal floor, and the clearance is connected to the first joint and the second joint respectively; A SAR sensor, which is electrically connected to the first radiator.

14. The antenna structure according to claim 1, characterized in that, It also includes a fourth radiator, the extension direction of which is perpendicular to the extension direction of the first radiator. The fourth radiator is located on one side of the first radiator, and the fourth radiator and the first radiator cover the same satellite's communication frequency band.

15. An electronic device, characterized in that, Including the antenna structure as described in any one of claims 1-14.

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