Antenna structure and electronic device

Abstract

This disclosure relates to an antenna structure and an electronic device. The antenna structure includes: a first radiator, which is a suspended stub, and includes a first upper frame point and a second upper frame point; a second radiator, one end of which is grounded and the other end of which cooperates with the first radiator to form a gap, the second upper frame point being disposed close to the second radiator relative to the first upper frame point, and the second radiator including a third upper frame point; a first feed, electrically connected to the first upper frame point, which excites the first radiator to radiate at least one low-frequency band signal; a second feed, electrically connected to the second upper frame point, which excites the stub between the second upper frame point and the end close to the second radiator to radiate an ultra-wideband signal; and a third feed, electrically connected to the third upper frame point, which excites the second radiator to radiate mid-to-high frequency band signals and / or 5G band signals.

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] With the development of communication technology, the operating frequency bands of antennas in terminal devices are increasing, making the integration of more transmission frequency bands in a smaller space an attractive research direction. Furthermore, the ability to achieve more accurate indoor positioning and other interconnectivity based on ultra-wideband (UWB) communication capabilities has also become an emerging trend in the communications industry. Therefore, antenna design integrating UWB signals has become a key research area. Utility Model Content

[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] The first radiator is a suspended branch, and the first radiator includes a first upper frame point and a second upper frame point.

[0006] The second radiator has one end grounded and the other end cooperates with the first radiator to form a gap. The second upper frame point is set close to the second radiator relative to the first upper frame point. The second radiator includes a third upper frame point.

[0007] A first power supply is electrically connected to the first upper frame point, and the first power supply excites the first radiator to radiate at least one low-frequency band signal.

[0008] The second feed is electrically connected to the second upper frame point, and the second feed excites the branch between the second upper frame point and the end near the second radiator to radiate an ultra-wideband signal.

[0009] The third power supply is electrically connected to the third upper frame point, and the third power supply excites the second radiator to radiate mid-to-high frequency band signals and / or 5G band signals.

[0010] Optionally, the second radiator operates in the mid-to-high frequency band in 1 / 4 wavelength mode.

[0011] Optionally, the 1 / 4 wavelength mode of the stub between the third upper frame point and the end near the first radiator operates in the 5G band, and the stub is a parasitic stub of the ultra-wideband band.

[0012] Optionally, the 1 / 4 wavelength mode of the stub between the second upper frame point and the end of the first radiator near the second radiator operates in the ultra-wideband frequency band, and the stub is a parasitic stub of the second radiator.

[0013] Optionally, the first radiator further includes a fourth upper frame point, which is located at the end of the first radiator away from the second radiator;

[0014] The antenna structure further includes a first matching circuit and a second matching circuit. The first matching circuit includes a first capacitor directly connected to the fourth upper frame point. The second matching circuit is connected between the first feed and the first upper frame point, and includes a second capacitor directly connected to the first upper frame point.

[0015] Optionally, the first matching circuit further includes a first inductor and a first switching circuit. The first switching circuit is connected in series with the first capacitor. One end of the first inductor is grounded and the other end is electrically connected between the first capacitor and the first switching circuit. The first switching capacitor is used to switch the low-frequency band in which the first radiator operates.

[0016] Optionally, the second matching circuit further includes a second inductor, one end of which is grounded and the other end is electrically connected between the first feed and the first-stage second capacitor.

[0017] Optionally, a third matching circuit is also included, which is electrically connected between the second feed and the second upper frame point, and the third matching circuit is equivalent to a short circuit for mid-to-high frequency band signals and 5G frequency band signals.

[0018] Optionally, a fourth matching circuit may also be included, which includes a second switching circuit and a primary inductor, wherein the primary inductor is equivalent to a short circuit for the ultra-wideband signal.

[0019] According to a second aspect of the present disclosure, an electronic device is provided, including an antenna structure as described in any of the foregoing embodiments.

[0020] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0021] As can be seen from the above embodiments, in the technical solution disclosed herein, the radiation of low-frequency band signals and ultra-wideband band signals is achieved by using suspended stubs, while also taking into account the realization of specific absorption rate detection function. The second radiator can be used to achieve the radiation of at least one of the mid-frequency band signals and 5G band signals. The antenna structure has a high degree of integration and multiple frequency band application scenarios, which is conducive to reducing the space occupied by the antenna structure and optimizing the antenna layout of electronic devices.

[0022] 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

[0023] 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.

[0024] Figure 1 This is a schematic diagram illustrating an antenna structure according to an exemplary embodiment.

[0025] Figure 2 yes Figure 1 A schematic diagram of the current distribution in the antenna structure.

[0026] Figure 3 This is a topological schematic diagram of an antenna structure according to an exemplary embodiment.

[0027] Figure 4 This is a graph showing the input reflection coefficient of the first radiator of an antenna structure according to an exemplary embodiment.

[0028] Figure 5 This is a graph showing another input reflection coefficient of the first radiator of an antenna structure according to an exemplary embodiment.

[0029] Figure 6 This is a graph showing the input reflection coefficient of the second radiator of an antenna structure according to an exemplary embodiment. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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."

[0033] Figure 1 This is a schematic diagram of an antenna structure according to an exemplary embodiment, such as... Figure 1 As shown, the antenna structure includes a first radiator 1, a second radiator 2, a first feed 3, a second feed 4, and a third feed 5. The first radiator 1 is a floating stub, meaning it is not grounded through metal ribs or other metal components. The first radiator 1 and the second radiator 2 form a gap, with the end of the second radiator 2 facing away from the first radiator 1 grounded. The first radiator 1 includes a first upper frame point 11 and a second upper frame point 12, with the second upper frame point 12 positioned closer to the second radiator 2 than the first upper frame point 11.

[0034] The first feed 3 is electrically connected to the first upper frame point 11, thereby exciting the first radiator 1 to radiate at least one low-frequency band signal, such as the B5 band or the B28 band, by feeding an electrical signal through the first feed 3. The second feed 4 is electrically connected to the second upper frame point 12, and by feeding the second feed 4, the stub between the second upper frame point 12 and the end near the second radiator 2 can be excited to radiate an ultra-wideband signal. It can be understood that the signal frequency of the ultra-wideband signal is much higher than that of the low-frequency band signal, so the requirement for the length of the stub is low. Therefore, the second upper frame point 12 is set closer to the second radiator 2 than the first upper frame point 11, which is beneficial for tuning and radiating the ultra-wideband signal. The second radiator 2 includes a third upper frame point 21, which is electrically connected to the third feed 5, so that the second radiator 2 can be excited by the third feed 5 to radiate at least one of the mid-to-high frequency band signal and the 5G band signal.

[0035] Based on this, in the technical solution disclosed herein, the radiation of low-frequency band signals and ultra-wideband band signals is achieved through suspended stubs, while the specific absorption rate detection function can also be realized. The second radiator can be used to achieve the radiation of at least one of the mid-frequency band signals and 5G band signals. This antenna structure has a high degree of integration and multiple frequency band application scenarios, which is conducive to reducing the space occupied by the antenna structure and optimizing the antenna layout of electronic devices.

[0036] In some embodiments, such as Figure 2As shown, the second radiator 2 can operate in the mid-to-high frequency band in 1 / 4 wavelength mode. By making reasonable use of the branch length of the second radiator 2 to tune the mid-to-high frequency band, and by utilizing the eigenmode of the constructed IFA antenna to radiate the mid-to-high frequency band, it is beneficial to improve the radiated signal of the mid-to-high frequency band.

[0037] Furthermore, still based on Figure 2 As shown, the 1 / 4 wavelength mode of the stub between the third upper frame point 21 and the end of the second radiator 2 near the first radiator 1 operates in the 5G band. This allows the second radiator 2 to simultaneously cover both the mid-to-high frequency band and the 5G band, improving the frequency band integration of the antenna structure. Furthermore, when the second feed 4 receives a signal, the third feed 5 can be in a non-operating state. The stub between the third upper frame point 21 and the end of the second radiator 2 near the first radiator 1 acts as a parasitic stub for the ultra-wideband frequency band, and the current coupled to this stub can be grounded through the third upper frame point 21. The 1 / 4 wavelength mode of the parasitic stub enhances the radiation performance of the ultra-wideband signal.

[0038] Similarly, in some embodiments, it is still based on Figure 2 As shown, the 1 / 4 wavelength mode of the stub between the second upper frame point 12 and the end of the first radiator 1 near the second radiator 2 operates in the ultra-wideband frequency band. The stub between the second upper frame point 12 and the end of the first radiator 1 near the second radiator 2 can serve as a parasitic stub of the second radiator 2. When the third feed 5 is in the working state, the second feed 4 can be in the non-working state. The current coupled from the second radiator 2 to the first radiator 1 can be grounded through the second upper frame point 12. The 1 / 4 wavelength mode of the parasitic stub is used to improve the radiation performance of the mid-to-high frequency band and the 5G frequency band.

[0039] In the above embodiments, such as Figure 3 As shown, in order to utilize the first radiator 1 as a suspended stub to achieve the specific absorption rate detection function, the first radiator 1 further includes a fourth upper frame point 13, which can be located at the end of the first radiator 1 away from the second radiator 2. The antenna structure also includes a first matching circuit 6 and a second matching circuit 7, to... Figure 3 As shown, the first matching circuit 6 and the second matching circuit 7 are respectively indicated by dashed boxes. The first matching circuit 6 includes a first-stage first capacitor 61 directly electrically connected to the fourth upper frame point 13; in other words, no other components are connected in parallel or series between the first-stage first capacitor 61 and the fourth upper frame point 13. The second matching circuit 7 includes a first-stage second capacitor 71 directly electrically connected to the first upper frame point 11; in other words, no other components are connected in parallel or series between the first-stage second capacitor 71 and the first upper frame point 11. Thus, through the configuration of the first-stage first capacitor 61 and the first-stage second capacitor 71, the specific absorption rate detection function can be achieved using suspended stubs.

[0040] Furthermore, the first matching circuit also includes a first inductor 62 and a first switching circuit 63. The first switching circuit 63 is connected in series with the first capacitor 61. One end of the first inductor 62 is grounded, and the other end is electrically connected between the first capacitor 61 and the first switching circuit 63. The low-frequency band in which the first radiator 1 operates can be switched by changing the switching state of the first switching circuit 63. For example... Figure 3 As shown, the first switching circuit 63 may include four parallel sub-circuits, and frequency band switching can be achieved by switching the on / off states of these four parallel sub-circuits. Figure 3 Taking RF1-RF4 as an example, each connected in series with a single inductor, we obtain... Figure 4 The graph shown is the input reflection coefficient curve of the first radiator 1 when the first switching circuit 63 is in different switching states. (See also...) Figure 4 It is understood that the low-frequency band in which the first radiator 1 operates can be achieved by switching the first switching circuit 63. For example, the first radiator 1 can switch between the B28TX band, B28RX band, B5TX band, B5RX band, B8TX band, and B8RX band. Of course, the above... Figure 3 The first switching circuit 63 in the diagram is only illustrative and can be adapted to the length of the first radiator 1 and the position of the fourth upper frame point 13 in other embodiments.

[0041] The second matching circuit 7 also includes a second inductor 72, one end of which is grounded and the other end is electrically connected between the first power supply 3 and the first-stage second capacitor 71. The second matching circuit 7, which includes the first-stage second capacitor 71 and the second inductor 72, is combined with the first matching circuit 6 to achieve matching in the low-frequency band.

[0042] In some embodiments, the antenna structure further includes a third matching circuit 8, which is electrically connected between the second feed 4 and the second upper frame point 12, and the third matching circuit 8 is equivalent to a short circuit for mid-to-high frequency band signals and 5G band signals. Thus, when the second feed 4 is in the operating state, such as... Figure 5 As shown, resonances covering the ultra-wideband frequency band can be matched. When the third feed 5 is in operation, the current coupled to the first radiator 1 can be short-circuited to ground through the fourth matching circuit 8, thereby forming a parasitic stub. For example, the third matching circuit 8 may include a third capacitor and a third inductor. The third capacitor is connected in series between the second feed 4 and the second upper frame point 12, and one end of the third inductor is grounded, while the other end is electrically connected between the second feed 4 and the third capacitor.

[0043] In some embodiments, the antenna structure further includes a fourth matching circuit 9, which includes a second switching circuit 91 and a primary inductor 92. The primary inductor 92 is directly electrically connected to the third upper frame point 21, and no other electronic components are connected in series or parallel in the connection circuit between the primary inductor 92 and the third upper frame point 21. The primary inductor is equivalent to a short circuit for ultra-wideband signals, so that when the second feed 4 is in the working state, the current coupled to the second radiator 2 can be grounded through the primary inductor, thereby forming parasitic branches and improving the radiation performance of ultra-wideband signals. Figure 6 As shown, the second radiator 2 can switch between the mid-to-high frequency band and the 5G frequency band by switching the second switching circuit 91. For example, as... Figure 6 As shown, the second radiator 2 can switch between the B3 band, B1 band, B39 band, B41 band, N78 band, and N79 band.

[0044] 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 foregoing embodiments. The first radiator 1 and the second radiator 2 may be partial segments of the electronic device, such as side frame segments or top frame segments, and can be designed as needed; this disclosure does not impose any limitations on this.

[0045] 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.

[0046] 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 by include: The first radiator is a suspended branch, and the first radiator includes a first upper frame point and a second upper frame point. The second radiator has one end grounded and the other end cooperates with the first radiator to form a gap. The second upper frame point is set close to the second radiator relative to the first upper frame point. The second radiator includes a third upper frame point. A first power supply is electrically connected to the first upper frame point, and the first power supply excites the first radiator to radiate at least one low-frequency band signal. The second feed is electrically connected to the second upper frame point, and the second feed excites the branch between the second upper frame point and the end near the second radiator to radiate an ultra-wideband signal. The third power supply is electrically connected to the third upper frame point, and the third power supply excites the second radiator to radiate mid-to-high frequency band signals and / or 5G band signals.

2. The antenna structure of claim 1, wherein, The second radiator operates in the mid-to-high frequency band in 1 / 4 wavelength mode.

3. The antenna structure of claim 2, wherein, The 1 / 4 wavelength mode of the stub between the third upper frame point and the end near the first radiator operates in the 5G band, and the stub is a parasitic stub of the ultra-wideband band.

4. The antenna structure of claim 1, wherein, The 1 / 4 wavelength mode of the stub between the second upper frame point and the end of the first radiator near the second radiator operates in the ultra-wideband frequency band, and the stub is a parasitic stub of the second radiator.

5. The antenna structure of claim 1, wherein, The first radiator further includes a fourth upper frame point, which is located at the end of the first radiator away from the second radiator; The antenna structure further includes a first matching circuit and a second matching circuit. The first matching circuit includes a first capacitor directly connected to the fourth upper frame point. The second matching circuit is connected between the first feed and the first upper frame point, and includes a second capacitor directly connected to the first upper frame point.

6. The antenna structure of claim 5, wherein, The first matching circuit further includes a first inductor and a first switching circuit. The first switching circuit is connected in series with the first primary capacitor. One end of the first inductor is grounded and the other end is electrically connected between the first primary capacitor and the first switching circuit. The first switching capacitor is used to switch the low-frequency band in which the first radiator operates.

7. The antenna structure of claim 5, wherein, The second matching circuit further includes a second inductor, one end of which is grounded and the other end is electrically connected between the first power supply and the first-stage second capacitor.

8. The antenna structure of claim 5, wherein, It also includes a third matching circuit, which is electrically connected between the second feed and the second upper frame point, and the third matching circuit is equivalent to a short circuit for mid-to-high frequency band signals and 5G frequency band signals.

9. The antenna structure of claim 5, wherein, It also includes a fourth matching circuit, which includes a second switching circuit and a primary inductor, wherein the primary inductor is equivalent to a short circuit for the ultra-wideband signal.

10. An electronic device, comprising: The antenna structure includes any one of claims 1-9.

Images