Antenna structure and electronic equipment

Abstract

The invention relates to an antenna structure and electronic equipment. The antenna structure comprises a metal floor. The first radiator is used for radiating a cellular frequency band signal; the second radiator and the metal floor are arranged at an interval, the second radiator is used for radiating satellite frequency band signals, the second radiator is matched with the first radiator to form a first breaking joint, the tail end, deviating from the first radiator, of the second radiator is used for forming a second breaking joint, and the second radiator comprises a first upper frame point and a second upper frame point; the second upper frame point is close to the first breaking joint relative to the first upper frame point; one end of the first capacitor is grounded, and the other end is electrically connected to the first upper frame point; the first feeder is electrically connected to the second upper frame point; one end of the first switch circuit is grounded, the other end of the first switch circuit is electrically connected between the first feed and the second upper frame point, and the first switch circuit comprises a first switch and a first zero ohm resistor connected in series with the first switch; wherein at least when the first radiator radiates one kind of cellular frequency band signal, the first switch is in a closed state.

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 communication technology, the frequency bands that mobile phones and other electronic devices need to cover are increasing. As a result, the number of antennas, tuning circuits and tuning switches required for mobile phones and other electronic devices will also increase, and the antenna structure will become increasingly complex. 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] Metal flooring;

[0006] A first radiator, the first radiator being used to radiate cellular frequency band signals;

[0007] The second radiator is spaced apart from the metal floor. The second radiator is used to radiate satellite frequency band signals. The second radiator cooperates with the first radiator to form a first gap. The end of the second radiator away from the first radiator is used to form a second gap. The second radiator includes a first upper frame point and a second upper frame point. The second upper frame point is closer to the first gap than the first upper frame point.

[0008] The first capacitor has one end grounded and the other end electrically connected to the first upper frame point;

[0009] The first power supply is electrically connected to the second upper frame point;

[0010] A first switching circuit, one end of which is grounded and the other end is electrically connected between the first power supply and the second upper frame point. The first switching circuit includes a first switch and a first zero-ohm resistor connected in series with the first switch.

[0011] Specifically, the first switch is in a closed state at least when the first radiator radiates a cellular frequency band signal.

[0012] Optionally, it also includes a second switch circuit and a third switch circuit, wherein the second switch circuit, the third switch circuit and the first switch circuit are connected in parallel in pairs, the second switch circuit includes a second switch and a first tuning element connected in series with the second switch, and the third switch circuit includes a third switch and a second tuning element connected in series with the third switch.

[0013] The antenna structure also includes:

[0014] Second capacitor;

[0015] The third capacitor, the second capacitor, and the third capacitor are connected in series between the second upper frame point and the first power supply, and the first switching circuit is electrically connected between the second capacitor and the third capacitor;

[0016] When the second switch is closed, the first switch is open, and the third switch is open, the satellite frequency band RX signal is radiated.

[0017] When the third switch is closed, the first switch is open, and the second switch is open, the radiated satellite frequency band TX signal is emitted.

[0018] Optionally, the first radiator includes a third upper frame point, and the antenna structure further includes:

[0019] The second power supply is electrically connected to the third upper frame point;

[0020] The fourth switching circuit has one end grounded and the other end electrically connected between the third upper frame point and the second feed. The fourth switching circuit includes a fourth switch and a second zero-ohm resistor connected in series with the fourth switch.

[0021] When the second radiator radiates the satellite frequency band signal, the fourth switch circuit is in a closed state.

[0022] Optionally, the length of the branch between the third upper frame point and the end of the first radiator used to form the first slit is greater than or equal to 5 mm and less than or equal to 7 mm, and the 1 / 4 wavelength resonant mode of the branch structure covers high frequency band signals.

[0023] Optionally, the length of the first radiator is greater than or equal to 15 mm and less than or equal to 20 mm, and the 1 / 4 wavelength resonant mode of the first radiator covers the intermediate frequency band signal.

[0024] Optional, also includes:

[0025] The fourth capacitor is connected in series between the second feed and the third upper frame point;

[0026] The first inductor is connected in series between the fourth capacitor and the second feed;

[0027] The second inductor has one end grounded and the other end electrically connected between the fourth capacitor and the third upper frame point;

[0028] The fifth capacitor has one end grounded and the other end electrically connected between the second power supply and the first inductor;

[0029] The second switching circuit is electrically connected between the second inductor and the fourth capacitor.

[0030] Optionally, a fifth switching circuit is also included, which includes a fifth switch and a third zero-ohm resistor connected in series with the fifth switch. One end of the third zero-ohm resistor is electrically connected between the first inductor and the fourth capacitor, and the other end is electrically connected to the fourth switching circuit at the same location between the second inductor and the fourth capacitor.

[0031] Optional, also includes:

[0032] The third radiator, the second radiator is located between the first radiator and the third radiator, the second radiator and the third radiator cooperate to form the second gap, the third radiator includes a fourth upper frame point, the third radiator is used to radiate Wifi frequency band signals;

[0033] A short-circuit switch, one end of which is grounded and the other end is directly electrically connected to the fourth upper frame point;

[0034] When the second radiator radiates the satellite frequency band signal, the short-circuit switch is in a closed state.

[0035] Optionally, the third radiator includes a fifth upper frame point, and the fourth upper frame point is positioned close to the second fracture relative to the fifth upper frame point;

[0036] The antenna structure also includes:

[0037] The third power supply is electrically connected to the fourth upper frame point. The third power supply feeds an electrical signal to excite the 1 / 4 wavelength resonant mode of the branch between the fourth upper frame point and the second fracture to cover the WiFi 5G frequency band.

[0038] The fourth feed is electrically connected to the fifth upper frame point. The fourth feed feeds an electrical signal to excite the 1 / 4 wavelength mode of the third radiator to cover the GPS frequency band. The fourth feed also feeds an electrical signal to excite the 1 / 4 wavelength resonant mode of the branch between the fifth upper frame point and the second fracture to cover the WiFi 2.4G frequency band.

[0039] Optional, also includes:

[0040] The third inductor has one end grounded and the other end electrically connected between the fourth upper frame point and the third power supply, and the short-circuit switch is electrically connected between the third inductor and the fourth upper frame point.

[0041] A sixth capacitor is connected in series between the third inductor and the third feed.

[0042] Optional, also includes:

[0043] A seventh capacitor is connected in series between the second inductor and the fourth upper frame point, and the short-circuit switch is electrically connected between the seventh capacitor and the fourth upper frame point.

[0044] Optional, also includes:

[0045] The eighth capacitor is connected in series between the fourth feed and the fifth upper frame point;

[0046] The fourth inductor has one end grounded and the other end electrically connected between the fifth upper frame point and the eighth capacitor;

[0047] The fifth inductor is connected in series between the eighth capacitor and the fourth feeder;

[0048] The ninth capacitor has one end grounded and the other end electrically connected between the fifth inductor and the fourth feeder.

[0049] Optionally, the length of the second radiator is greater than or equal to 26 mm and less than or equal to 30 mm, and the 1 / 4 wavelength resonant mode of the branch between the second slit and the second upper frame point covers the BeiDou satellite frequency band.

[0050] According to a second aspect of the present disclosure, an electronic device is provided, including an antenna structure as described in any one of the present disclosures.

[0051] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0052] As can be seen from the above embodiments, in this disclosure, since satellite frequency band signals and cellular frequency band signals do not need to work simultaneously, when the first radiator radiates cellular frequency band signals, the branches between the first upper frame point and the second upper frame point of the second radiator are constructed as magnetic parasitic branches of the first radiator to improve the radiation efficiency of the first radiator. This helps to reduce the corresponding matching circuit and active switch design, thereby reducing the number of upper frame points of the antenna structure, simplifying the antenna structure, and achieving cost reduction and efficiency improvement.

[0053] 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

[0054] 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.

[0055] Figure 1 This is a schematic diagram of an antenna structure according to an exemplary embodiment.

[0056] Figure 2 This is a simplified topological diagram of an antenna structure according to an exemplary embodiment.

[0057] Figure 3 This is a current distribution diagram on the first radiator and the second radiator when the first switch is closed and the first radiator radiates a cellular frequency band signal in an antenna structure according to an exemplary embodiment.

[0058] Figure 4 This is a standing wave curve diagram of a second radiator according to an exemplary embodiment.

[0059] Figure 5 This is a radiation efficiency curve of a second radiator according to an exemplary embodiment.

[0060] Figure 6 This is a standing wave curve diagram of a first radiator according to an exemplary embodiment.

[0061] Figure 7 This is a radiation efficiency curve of a first radiator according to an exemplary embodiment.

[0062] Figure 8 This is a standing wave curve of a third radiator when a third power supply is used to feed an electrical signal, according to an exemplary embodiment.

[0063] Figure 9 This is a radiation efficiency curve of a third radiator when a third power supply is used to feed an electrical signal, according to an exemplary embodiment.

[0064] Figure 10 This is a standing wave curve of a third radiator when a fourth feeder inputs an electrical signal, according to an exemplary embodiment.

[0065] Figure 11 This is a graph showing the radiation efficiency of a third radiator when a fourth feeder inputs an electrical signal, according to an exemplary embodiment. Detailed Implementation

[0066] 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.

[0067] 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.

[0068] 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."

[0069] Figure 1 This is a schematic diagram of an antenna structure according to an exemplary embodiment. Figure 2 This is a simplified topological diagram of an antenna structure according to an exemplary embodiment. For example... Figure 1 and Figure 2As shown, the antenna structure includes a first radiator 1, a second radiator 2, a third radiator 3, and a metal ground plane 4. The first radiator 1, second radiator 2, and third radiator 3 are all disposed on one side of the metal ground plane 4, forming an antenna clearance between them and the metal ground plane 4. The second radiator 2 is disposed between the first radiator 1 and the third radiator 3. The first radiator 1 can be used to radiate cellular frequency band signals; for example, it can radiate one or more cellular frequency band signals. For instance, it can radiate B3 TX band signals, B3... The second radiator 2 can radiate satellite frequency band signals, such as BeiDou TX band signals, BeiDou RX band signals, TianTong TX band signals, and TianTong RX band signals; the third radiator 3 can radiate WiFi frequency band signals, such as WiFi 5G band signals and WiFi 2.4G band signals; furthermore, the third radiator 3 can also radiate GPS frequency band signals, such as GPS L1 band signals, GPS L2 band signals, and GPS L5 band signals.

[0070] The spacing between the second radiator 2 and the metal floor 4 can be understood as forming a single, uninterrupted space between them, without any connecting ribs. The second radiator 2 is suspended. The first radiator 1 and the metal floor 4 can be connected via metal ribs, for example, the end of the first radiator 1 facing away from the second radiator 2 can be connected to the metal floor 4 via a metal rib. Similarly, the third radiator 3 and the metal floor 4 can also be connected via metal ribs, for example, the end of the third radiator 3 facing away from the second radiator 2 can be connected to the metal floor 4 via a metal rib. The metal ribs and the metal floor 4 can be an integral structure, or they can be fixedly connected by welding or other methods. This disclosure does not impose any limitations on this.

[0071] The second radiator 2 includes a first upper frame point 21 and a second upper frame point 22, with the second upper frame point 22 positioned relative to the first upper frame point 21 and closer to the first gap, i.e., the second upper frame point 22 positioned relative to the first upper frame point 21 and closer to the first radiator 1. The antenna structure also includes a first capacitor C1, a first feed 5, and a first switching circuit 6. One end of the first capacitor C1 is grounded, and the other end is electrically connected to the first upper frame point 21. The first feed 5 is electrically connected to the second upper frame point 22. The electrical signal fed through the first feed 5 can excite a current to be generated on the second radiator 2. The first switching circuit 6... Figure 2 As shown in the dashed box, the first switching circuit 6 includes a first switch RF1 and a first zero-ohm resistor R1 connected in series with the first switch RF1. At least when the first radiator 1 radiates a cellular frequency band signal, the first switch RF1 switches to the closed state. At this time, the first zero-ohm resistor R1 is electrically connected to the second radiator 2. Since the first upper frame point 21 is grounded through the first capacitor C1, and since the satellite frequency band signal and the cellular frequency band signal do not need to operate simultaneously, the stub between the first upper frame point 21 and the second upper frame point 22 becomes a magnetic parasitic stub of the first radiator 1, such as... Figure 3 As shown, Figure 3 The diagram shows the current distribution of the second radiator 2 when the first radiator 1 is operating. Figure 3 The current flow direction on the branch between the first upper frame point 21 and the second upper frame point 22 is the same as the current flow direction on the first radiator 1. Therefore, the radiation efficiency of the first radiator 1 can be improved, which in turn helps to reduce the corresponding matching circuit and active switch design, thereby reducing the number of upper frame points of the antenna structure, simplifying the antenna structure, and achieving cost reduction and efficiency improvement.

[0072] To improve the radiation efficiency of satellite frequency band signals, taking the BeiDou satellite frequency band as an example, the length of the second radiator 2 can be greater than or equal to 26mm and less than or equal to 30mm, and the 1 / 4 wavelength resonant mode of the spur between the second slit and the second upper frame point 22 covers the BeiDou satellite frequency band. That is... Figure 2 The 1 / 4 wavelength resonant mode of the branch between the left-side fracture and the second upper frame point 22 covers the BeiDou satellite frequency band. Covering the BeiDou satellite frequency band through the basic resonant mode of this 1 / 4 wavelength resonant mode is beneficial to ensuring the radiation efficiency of the BeiDou satellite frequency band.

[0073] In some embodiments, for tuning the second radiator 2, the antenna structure further includes a second switching circuit 7 and a third switching circuit 8. The second switching circuit 7 includes a second switch RF2 and a first tuning element connected in series with the second switch RF2, such as... Figure 2 As shown, the first tuning element is an inductor, and the third switching circuit 8 includes a third switch RF3 and a second tuning element connected in series with the third switch RF3, such as... Figure 2As shown, the second tuning element is a capacitor. The antenna structure also includes a second capacitor C2 and a third capacitor C3, which are connected in series between the second upper frame point 22 and the first feed 5. A first switching circuit 6 is electrically connected between the second capacitor C2 and the third capacitor C3, and second switching circuits 7 and 8 are also electrically connected between the second capacitor C2 and the third capacitor C3, respectively. Taking the second radiator 2 radiating the communication frequency band of the BeiDou satellite as an example, when the second switch RF2 is closed, the first switch RF1 is open, and the third switch RF3 is open, it radiates the BeiDou RX signal; when the third switch RF3 is closed, the first switch RF1 is open, and the second switch RF2 is open, it radiates the BeiDou frequency band TX signal.

[0074] For example, C2 = 33pF, C3 = 3.5pF, the first tuning element connected in series with the second switch RF2 is an inductor with an inductance of 5.1nH, and the second tuning element connected in series with the third switch RF3 is a capacitor with a capacitance of 3.1pF. Based on this, we obtain the following... Figure 4 The standing wave curve of the second radiator 2 shown and as follows Figure 5 The radiation efficiency diagram of the second radiator 2 is shown. (See also...) Figure 4 The red curve shows that the second radiator 2 can cover the BeiDou TX band, and the green curve shows that it can cover the BeiDou RX band. Figure 4 The radiation efficiency of the BeiDou TX band reaches about -3.8dB, and the radiation efficiency of the BeiDou RX band reaches about -2.2dB, demonstrating excellent antenna performance.

[0075] In some embodiments, the first radiator 1 further includes a third upper frame point 11, and the antenna structure further includes a second feed 9 and a fourth switching circuit 10. The second feed 9 is electrically connected to the third upper frame point 11. The electrical signal fed into the second feed 9 excites the first radiator 1 to generate current, thereby achieving coverage of the target frequency band. The fourth switching circuit 10 is as follows: Figure 2 As shown in the dashed box, the fourth switch circuit 10 includes a fourth switch RF4 and a second zero-ohm resistor R2. When the second radiator 2 radiates satellite frequency band signals, the fourth switch RF4 is in a closed state, thereby grounding the first radiator 1 through the second zero-ohm resistor R2, reducing the radiation influence of the first radiator 1 on the second radiator 2. For example, in the aforementioned embodiment, when the fourth switch RF4 is closed, the second switch RF2 is closed, the first switch RF1 is open, and the third switch RF3 is open, the BeiDou RX signal is radiated; when the fourth switch RF4 is closed, the third switch RF3 is closed, the first switch RF1 is open, and the second switch RF2 is open, the BeiDou frequency band TX signal is radiated.

[0076] For example, the first radiator 1 can cover at least one intermediate frequency band signal and at least one high frequency band signal, such as the intermediate frequency band signals being the B1 and B40 band signals, and the high frequency band signal being the N78 band signal; then, to ensure radiation efficiency, the length of the branch between the third upper frame point 11 and the end of the first radiator 1 used to form the first fracture is greater than or equal to 5 mm and less than or equal to 7 mm, that is... Figure 3 In the range of 5mm≤L1≤7mm, the quarter-wavelength resonant mode of this stub covers high-frequency signals, such as the N78 band; similarly, the length of the first radiator 1 is greater than or equal to 15mm and less than or equal to 20mm, that is... Figure 3 In the range of 15mm≤L2≤20mm, the 1 / 4 wavelength resonant mode of the first radiator 1 covers the intermediate frequency band signal, such as covering the B1 band signal and the B40 band signal.

[0077] In some embodiments, in order to match the first radiator 1, the antenna structure further includes a fourth capacitor C4, a fifth capacitor C5, a first inductor L1, and a second inductor L2. The fourth capacitor C4 is connected in series between the second feed 9 and the third upper frame point 11; the first inductor L1 is connected in series between the fourth capacitor C4 and the second feed 9; one end of the second inductor L2 is grounded, and the other end is electrically connected between the fourth capacitor C4 and the third upper frame point 11; one end of the fifth capacitor C5 is grounded, and the other end is electrically connected between the second feed 9 and the first inductor L1; subsequently, when the second radiator 2 radiates satellite frequency band signals, the electrical signal of the first radiator 1 can be grounded through the second zero-ohm resistor R2 without passing through other electronic components.

[0078] To tune and match the first radiator 1 to switch different coverage frequency bands, the antenna structure also includes a fifth switching circuit 12, a sixth switching circuit 13, and a seventh switching circuit 14. The fifth switching circuit includes a fifth switch RF5 and a third zero-ohm resistor R3 connected in series with the fifth switch RF5. One end of the third zero-ohm resistor R3 is electrically connected between the first inductor L1 and the fourth capacitor C4, and the other end is electrically connected to the fourth switching circuit 10 at the same location between the second inductor L2 and the fourth capacitor C4. The sixth switching circuit 10 and the seventh switching circuit 14 are respectively as follows... Figure 2 The corresponding dashed box is shown in the figure. The sixth switch circuit 10 includes a sixth switch RF6 and a third tuning element connected in series with the sixth switch RF6, for example, the third tuning element being an inductor. The seventh switch circuit 14 includes a seventh switch RF7 and a fourth tuning element connected in series with the seventh switch RF5, for example, the fourth tuning element being an inductor. The fourth switch circuit 10, the sixth switch circuit 13, and the seventh switch circuit 14 are connected in parallel in pairs. Tuning can be achieved by switching the open / closed states of the fourth switch RF4, the fifth switch RF5, the sixth switch RF6, and the seventh switch RF7.

[0079] For example, when the first switch RF1 is closed, the second switch RF2 is open, the third switch RF3 is open, the fourth switch RF4 is open, the fifth switch RF5 is open, the sixth switch RF6 is open, and the seventh switch RF7 is open, the first radiator 1 covers the B3TX frequency band; when the first switch RF1 is closed, the second switch RF2 is open, the third switch RF3 is open, the fourth switch RF4 is open, the fifth switch RF5 is open, the sixth switch RF6 is closed, and the seventh switch RF7 is open, the first radiator 1 covers the B3RX ...TX frequency band; when the first switch RF1 is closed, the second switch RF2 is open, the third switch RF3 is open, When switch RF5 is open, the sixth switch RF6 is open, and the seventh switch RF7 is closed, the first radiator 1 covers the B1 frequency band; when the first switch RF1 is closed, the second switch RF2 is open, the third switch RF3 is open, the fourth switch RF4 is open, the fifth switch RF5 is closed, the sixth switch RF6 is open, and the seventh switch RF7 is open, the first radiator 1 covers the B40 or B41 frequency band; when the first switch RF1 is open, the second switch RF2 is open, the third switch RF3 is open, the fourth switch RF4 is open, the fifth switch RF5 is open, the sixth switch RF6 is open, and the seventh switch RF7 is open, the first radiator 1 covers the N78 frequency band.

[0080] For example, C4 = 0.7pF, C5 = 1.1pF, L1 = 8.1nH, L2 = 2.2nH, the third tuning element connected in series with the sixth switch RF6 is an inductor with an inductance of 15nH, and the fourth tuning element connected in series with the seventh switch RF7 is an inductor with an inductance of 6.8nH. Based on this, we obtain the following... Figure 6 The standing wave curve of the first radiator 1 shown and as follows Figure 7 The radiation efficiency diagram of the first radiator 1 is shown. (See also...) Figure 6 and Figure 7 The radiation efficiency of the B3TX band is approximately -3.7dB, the B3RX band is approximately -3.3dB, the B1 band is approximately -3dB, the B40 band is approximately -4dB, the B41 band is approximately -4dB, and the N78 band is approximately -4.5dB, demonstrating excellent antenna performance.

[0081] In the above embodiments, the third radiator 3 includes a fourth upper frame point 31. The antenna structure also includes a short-circuit switch RFn, one end of which is grounded and the other end is directly electrically connected to the fourth upper frame point 31. The direct connection between the short-circuit switch RFn and the fourth upper frame point 31 indicates that there are no other electronic components between them. When the short-circuit switch RFn is closed, the third radiator 3 is short-circuited. Therefore, when the second radiator 2 radiates satellite frequency band signals, the short-circuit switch RFn is in a closed state, causing the third radiator 3 to be short-circuited, thus reducing the impact on the satellite frequency band signals.

[0082] Furthermore, the third radiator 3 also includes a fifth upper frame point 32, and the fourth upper frame point 31 is positioned relative to the fifth upper frame point 32 close to the second fracture, that is... Figure 2 As shown, the fourth upper frame point 31 is located to the right of the fifth upper frame point 32. The antenna structure also includes a third feed 15 and a fourth feed 16. The third feed 15 is electrically connected to the fourth upper frame point 31, and an electrical signal is fed through the third feed 15 to excite the 1 / 4 wavelength resonant mode of the spur between the fourth upper frame point 31 and the second gap to cover the WiFi 5G band. The fourth feed 16 is electrically connected to the fifth upper frame point 32, and an electrical signal is fed through the fourth feed 16 to excite the 1 / 4 wavelength resonant mode of the third radiator 3 to cover the GPS band. The fourth feed 16 also excites the 1 / 4 wavelength resonant mode of the spur between the fifth upper frame point 32 and the second gap to cover the WiFi 2.4G band. In other words, multiple spurs can be constructed on the third radiator 3, and the target frequency band can be covered by the 1 / 4 wavelength resonant mode of each spur, ensuring the radiation efficiency of the target frequency band.

[0083] Furthermore, the antenna structure also includes a third inductor L3 and a sixth capacitor C6. One end of the third inductor L3 is grounded, and the other end is electrically connected between the fourth upper frame point 31 and the third feed 15. A short-circuit switch RFn is electrically connected between the third inductor L3 and the fourth upper frame point 31 to ensure that no other electronic components are connected between the short-circuit switch RFn and the fourth upper frame point 31. The sixth capacitor C6 is connected in series between the third inductor L3 and the third feed 15. Thus, by matching the third inductor L3 and the sixth capacitor C6, coverage of the WiFi 5G band is achieved. Since the third radiator 3 also covers the WiFi 2.4G and GPS bands, to improve isolation, the antenna structure also includes a seventh capacitor C7. The seventh capacitor C7 is connected in series between the second inductor L2 and the fourth upper frame point 31, and the short-circuit switch RFn is electrically connected between the seventh capacitor C7 and the fourth upper frame point 31. The capacitance value of the seventh capacitor C7 can be below 0.5pF, using this small capacitor to improve isolation.

[0084] For example, L3 = 1.2 nH, C6 = 0.3 pF, C7 = 0.2 pF, and simulations were performed based on this. Figure 8 and Figure 9 The simulation curves shown are as follows. Among them, as... Figure 8 The figure shown is the standing wave curve of the third radiator 3 when the third feed 15 receives an electrical signal. Figure 9 The diagram shows the radiation efficiency of the third radiator 3 when an electrical signal is fed in by the third feed 15. (See also...) Figure 8 and Figure 9 The third radiator 3 can cover the WiFi 5G frequency band and has a radiation efficiency of around -6dB, demonstrating excellent antenna performance.

[0085] Similarly, to match the WiFi 2.4G band and the GPS band, the antenna structure also includes an eighth capacitor C8, a ninth capacitor C9, a fourth inductor L4, and a fifth inductor L5. The eighth capacitor C8 is connected in series between the fourth feed 16 and the fifth upper frame point 32; one end of the fourth inductor L4 is grounded, and the other end is electrically connected between the fifth upper frame point 32 and the eighth capacitor C8; the fifth inductor L5 is connected in series between the eighth capacitor C8 and the fourth feed 16; one end of the ninth capacitor C9 is grounded, and the other end is electrically connected between the fifth inductor L5 and the fourth feed 16.

[0086] For example, C8 = 0.7 pF, C9 = 2.2 pF, L4 = 9 nH, L5 = 6.2 nH, and simulations were performed based on this. Figure 10 and Figure 11 The simulation curves shown are as follows. Among them, as... Figure 10 The figure shown is the standing wave curve of the third radiator 3 when the fourth feed 16 feeds an electrical signal. Figure 11 The diagram shows the radiation efficiency of the third radiator 3 when an electrical signal is fed in by the fourth feed 16. (See also...) Figure 10 and Figure 10 The third radiator 3 can cover the WiFi 2.4G band and the GPS band, and the radiation efficiency of the WiFi 2.4G band is about -4.5dB, and the radiation efficiency of the GPS band is about -4.5dB, which shows excellent antenna performance.

[0087] In the technical solution disclosed herein, the antenna structure including a first radiator 1, a second radiator 2, and a third radiator 3 is used as an example for illustration. In other embodiments, the antenna structure may also include a first radiator 1 and a second radiator 2. The technical solutions related to the first radiator 1 and the second radiator 2 can be referred to the foregoing embodiments, and will not be described in detail here.

[0088] Based on the technical solution of this disclosure, an electronic device is also provided. This electronic device includes the antenna structure described in any of the foregoing embodiments, and the first radiator 1, the second radiator 2, and the third radiator 3 are all located at the top of the electronic device. This allows for radiation through the top-mounted first radiator 1, second radiator 2, and third radiator 3, thereby reducing the impact on communication caused by the user holding the electronic device and improving communication performance. The first radiator 1, second radiator 2, and third radiator 3 form part of the outer frame of the electronic device.

[0089] 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.

[0090] 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: Metal flooring; A first radiator, the first radiator being used to radiate cellular frequency band signals; The second radiator is spaced apart from the metal floor. The second radiator is used to radiate satellite frequency band signals. The second radiator cooperates with the first radiator to form a first gap. The end of the second radiator away from the first radiator is used to form a second gap. The second radiator includes a first upper frame point and a second upper frame point. The second upper frame point is closer to the first gap than the first upper frame point. The first capacitor has one end grounded and the other end electrically connected to the first upper frame point; The first power supply is electrically connected to the second upper frame point; A first switching circuit, one end of which is grounded and the other end is electrically connected between the first power supply and the second upper frame point. The first switching circuit includes a first switch and a first zero-ohm resistor connected in series with the first switch. Specifically, the first switch is in a closed state at least when the first radiator radiates a cellular frequency band signal.

2. The antenna structure according to claim 1, characterized in that, It also includes a second switch circuit and a third switch circuit, wherein the second switch circuit, the third switch circuit and the first switch circuit are connected in parallel in pairs, the second switch circuit includes a second switch and a first tuning element connected in series with the second switch, and the third switch circuit includes a third switch and a second tuning element connected in series with the third switch. The antenna structure also includes: Second capacitor; The third capacitor, the second capacitor, and the third capacitor are connected in series between the second upper frame point and the first power supply, and the first switching circuit is electrically connected between the second capacitor and the third capacitor; When the second switch is closed, the first switch is open, and the third switch is open, the satellite frequency band RX signal is radiated. When the third switch is closed, the first switch is open, and the second switch is open, the radiated satellite frequency band TX signal is emitted.

3. The antenna structure according to claim 1, characterized in that, The first radiator includes a third upper frame point, and the antenna structure further includes: The second power supply is electrically connected to the third upper frame point; The fourth switching circuit has one end grounded and the other end electrically connected between the third upper frame point and the second feed. The fourth switching circuit includes a fourth switch and a second zero-ohm resistor connected in series with the fourth switch. When the second radiator radiates the satellite frequency band signal, the fourth switch circuit is in a closed state.

4. The antenna structure according to claim 3, characterized in that, The length of the branch between the third upper frame point and the end of the first radiator used to form the first fracture is greater than or equal to 5 mm and less than or equal to 7 mm, and the 1 / 4 wavelength resonant mode of the branch structure covers high frequency band signals.

5. The antenna structure according to claim 3, characterized in that, The length of the first radiator is greater than or equal to 15 mm and less than or equal to 20 mm, and the 1 / 4 wavelength resonant mode of the first radiator covers the intermediate frequency band signal.

6. The antenna structure according to claim 3, characterized in that, Also includes: The fourth capacitor is connected in series between the second feed and the third upper frame point; The first inductor is connected in series between the fourth capacitor and the second feed; The second inductor has one end grounded and the other end electrically connected between the fourth capacitor and the third upper frame point; The fifth capacitor has one end grounded and the other end electrically connected between the second power supply and the first inductor; The fourth switching circuit is electrically connected between the second inductor and the fourth capacitor.

7. The antenna structure according to claim 6, characterized in that, It also includes a fifth switching circuit, which includes a fifth switch and a third zero-ohm resistor connected in series with the fifth switch. One end of the third zero-ohm resistor is electrically connected between the first inductor and the fourth capacitor, and the other end is electrically connected to the fourth switching circuit at the same location between the second inductor and the fourth capacitor.

8. The antenna structure according to claim 1, characterized in that, Also includes: The third radiator, the second radiator is located between the first radiator and the third radiator, the second radiator and the third radiator cooperate to form the second gap, the third radiator includes a fourth upper frame point, the third radiator is used to radiate Wifi frequency band signals; A short-circuit switch, one end of which is grounded and the other end is directly electrically connected to the fourth upper frame point; When the second radiator radiates the satellite frequency band signal, the short-circuit switch is in a closed state.

9. The antenna structure according to claim 8, characterized in that, The third radiator includes a fifth upper frame point, and the fourth upper frame point is positioned close to the second fracture relative to the fifth upper frame point. The antenna structure also includes: The third power supply is electrically connected to the fourth upper frame point. The third power supply feeds an electrical signal to excite the 1 / 4 wavelength resonant mode of the branch between the fourth upper frame point and the second fracture to cover the WiFi 5G frequency band. The fourth feed is electrically connected to the fifth upper frame point. The fourth feed feeds an electrical signal to excite the 1 / 4 wavelength mode of the third radiator to cover the GPS frequency band. The fourth feed also feeds an electrical signal to excite the 1 / 4 wavelength resonant mode of the branch between the fifth upper frame point and the second fracture to cover the WiFi 2.4G frequency band.

10. The antenna structure according to claim 9, characterized in that, Also includes: The third inductor has one end grounded and the other end electrically connected between the fourth upper frame point and the third power supply, and the short-circuit switch is electrically connected between the third inductor and the fourth upper frame point; A sixth capacitor is connected in series between the third inductor and the third feed.

11. The antenna structure according to claim 10, characterized in that, Also includes: A seventh capacitor is connected in series between the second inductor and the fourth upper frame point, and the short-circuit switch is electrically connected between the seventh capacitor and the fourth upper frame point.

12. The antenna structure according to claim 9, characterized in that, Also includes: The eighth capacitor is connected in series between the fourth feed and the fifth upper frame point; The fourth inductor has one end grounded and the other end electrically connected between the fifth upper frame point and the eighth capacitor; The fifth inductor is connected in series between the eighth capacitor and the fourth feeder; The ninth capacitor has one end grounded and the other end electrically connected between the fifth inductor and the fourth feeder.

13. The antenna structure according to claim 1, characterized in that, The length of the second radiator is greater than or equal to 26 mm and less than or equal to 30 mm, and the 1 / 4 wavelength resonant mode of the branch between the second slit and the second upper frame point covers the BeiDou satellite frequency band.

14. An electronic device, characterized in that, The antenna structure includes any one of claims 1-13.

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