Antenna structure and electronic device

Abstract

This disclosure relates to an antenna structure and an electronic device. The antenna structure includes: a first radiator for radiating satellite frequency band signals; a second radiator, perpendicular to the extension direction of the first radiator, for radiating cellular frequency band signals; a third radiator, which forms a gap with the end of the second radiator away from the first radiator, for radiating both satellite frequency band signals and cellular frequency band signals; and a first antenna switch, one end of which is grounded and the other end electrically connected to the end of the second radiator away from the third radiator; wherein, when the third radiator operates in satellite frequency band signal mode, the feed point of the second radiator switches to an off state, the first antenna switch switches to an on state, and the second radiator and the third radiator couple to generate resonance.

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, satellite antennas are typically mounted on the top bezel of electronic devices. In head-and-hand communication scenarios, the performance of satellite antennas is significantly affected by the head and hands, resulting in a sharp decline in antenna performance and hindering normal communication between electronic devices and satellites. 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 being used to radiate satellite frequency band signals;

[0006] The second radiator is arranged perpendicularly to the extension direction of the first radiator, and the second radiator is used to radiate cellular frequency band signals.

[0007] The third radiator is configured to radiate satellite frequency band signals and cellular frequency band signals by cooperating with the end of the second radiator away from the first radiator to form a gap.

[0008] A first antenna switch, one end of which is grounded and the other end is electrically connected to the end of the second radiator that is away from the third radiator;

[0009] When the third radiator operates in the satellite frequency band, the feed point of the second radiator is switched to the off state, the first antenna switch is switched to the on state, and the second radiator and the third radiator are coupled to generate resonance.

[0010] Optionally, the coupling resonant frequency of the second radiator is greater than the operating frequency of the third radiator.

[0011] Optionally, in the extending direction of the second radiator, the distance between the gap formed by the second radiator and the third radiator and the first radiator is greater than or equal to 45 mm.

[0012] Optionally, a fourth radiator is also included, the extension direction of which is the same as that of the second radiator. The fourth radiator and the second radiator cooperate to form a gap at the end away from the third radiator. The fourth radiator is used to radiate cellular frequency band signals. The fourth radiator and the first radiator are connected to the ground through the same grounding bead position.

[0013] Optionally, it also includes a first slit switch and a second slit switch, wherein the first slit switch is connected to the second radiator and the third radiator, and the second slit switch is connected to the third radiator and the fourth radiator;

[0014] When the third radiator operates in the cellular frequency band signal, the first and second slit switches are disconnected, and the first antenna switch is disconnected.

[0015] Optionally, the first antenna switch is connected in series with a 0-ohm resistor.

[0016] Optional, also includes:

[0017] The metal floor has the first radiator, the second radiator, and the third radiator all located outside the metal floor, with the second radiator forming a solid clear space between itself and the metal floor.

[0018] A SAR sensor, which is electrically connected to the second radiator.

[0019] Optionally, a feed signal fed into the feed point electrically connected to the second radiator excites the second radiator to generate a half-wave resonant mode to cover the N78 and N79 frequency bands.

[0020] Optionally, it also includes a second antenna switch, one end of which is grounded and the other end is electrically connected to the upper frame point of the third radiator. The upper frame point is the feed point of the second radiator. When the signal is fed in, the current generated on the third radiator is zero.

[0021] When the second radiator operates in the N78 and N79 frequency bands, the second antenna switch is turned on; when the third radiator radiates cellular frequency band signals or satellite frequency band signals, the second antenna switch is turned off.

[0022] Optionally, the second antenna switch is connected in series with a 0-ohm resistor.

[0023] 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.

[0024] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0025] As can be seen from the above embodiments, the present disclosure can achieve complementarity between the main antenna and the diversity antenna in satellite communication mode through the first radiator and the third radiator, thereby improving the efficiency of satellite communication in head-and-hand communication scenarios; moreover, when the third radiator radiates satellite frequency band signals, the second radiator can be used as a parasitic branch of the third radiator to help improve the radiation efficiency of the third radiator.

[0026] 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

[0027] 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.

[0028] Figure 1 This is a schematic diagram illustrating an antenna structure according to an exemplary embodiment.

[0029] Figure 2 This is a current distribution diagram of an antenna structure according to an exemplary embodiment.

[0030] Figure 3 This is a radiation efficiency curve of an antenna structure according to an exemplary embodiment.

[0031] Figure 4 This is a radiation pattern of an antenna structure radiating a signal in the Tiantong receiving band in free space, according to an exemplary embodiment.

[0032] Figure 5 This is an application scenario diagram of an antenna structure according to an exemplary embodiment.

[0033] Figure 6 An antenna structure is shown according to an exemplary embodiment. Figure 5 The radiation pattern of Tiantong receiving frequency band signals in the application scenario.

[0034] Figure 7 This is another current distribution diagram of an antenna structure according to an exemplary embodiment.

[0035] Figure 8 This is a radiation efficiency curve of the second antenna switch of an antenna structure shown according to an exemplary embodiment when the switch is off.

[0036] Figure 9 This is a radiation efficiency curve of the second antenna switch of an antenna structure shown according to an exemplary embodiment. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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."

[0040] Figure 1 This is a schematic diagram illustrating an antenna structure according to an exemplary embodiment. Figure 1 As shown, the antenna structure includes a first radiator 1, a second radiator 2, and a third radiator 3. The first radiator 1 radiates satellite frequency signals. The extension direction of the second radiator 2 is perpendicular to the extension direction of the first radiator 1, and the second radiator 2 can also radiate cellular frequency signals. The third radiator 3 is located at the end of the second radiator 2 opposite to the first radiator 1, and the third radiator 3 cooperates with the second radiator 2 to form a gap. The third radiator 3 radiates both satellite frequency signals and cellular frequency signals. The extension direction of the third radiator 3 is perpendicular to the extension direction of the first radiator 1. Based on this, when an electronic device with this antenna structure is in a head-and-hand communication scenario, it can radiate satellite frequency signals through the third radiator 3, assisting the first radiator 1 in satellite communication, achieving complementarity between the main satellite antenna and the diversity satellite antenna, and improving the satellite communication efficiency in the head-and-hand communication scenario.

[0041] Furthermore, the antenna structure also includes a first antenna switch 4. One end of the first antenna switch 4 is grounded, and the other end is electrically connected to the second radiator 2. The first antenna switch 4 is also electrically connected to the end of the second radiator 2 furthest from the third radiator 3. When the third radiator 3 operates in the satellite frequency band, the feed point of the second radiator 2 switches to the off state, that is, the feed point stops feeding electrical signals to the second radiator 2, and the first antenna switch 4 switches to the on state. The second radiator 2 is grounded through the first antenna switch 4. The second radiator 2 can act as a parasitic branch of the third radiator 3, so that the second radiator 2 and the third radiator 3 are coupled to resonate, thereby improving the radiation efficiency of the third radiator 3. The coupling resonant frequency of the second radiator 2 can be greater than the operating frequency of the third radiator 3, so that the second radiator 2 acts as an electrically parasitic branch of the third radiator 3, thereby improving the radiation efficiency of the third radiator 3 in the satellite communication frequency band. The first antenna switch 4 can be connected to ground in series with a 0-ohm resistor, or in other embodiments, the first antenna switch 4 can also be connected to ground in series with a suitable inductor or capacitor.

[0042] For example, taking the third radiator 3 operating in the antenna receiving frequency band as an example, the first antenna switch 4 is turned on, and the end of the second radiator 2 facing away from the third radiator 3 is connected to ground through the first antenna switch 4, such as... Figure 2 As shown, the second radiator 2 is excited to generate a current through coupling with the third radiator 3; as Figure 3 As shown, through the parasitic effect of the second radiator 2, the radiation efficiency of the third radiator 3 in the Tiantong receiving frequency band can reach -2.6dB, meeting communication requirements. Furthermore, by connecting the end of the second radiator 2 away from the third radiator 3 to ground via the first antenna switch 4, the gap in the body of the third radiator 3 can be formed by the second radiator 2 and the third radiator 3, maximizing the distance between the gap and the first radiator 1. This ensures that the radiation pattern of the third radiator 3 radiates more towards the top of the first radiator 1.

[0043] Taking the application of antenna structure in mobile phones as an example, Figure 4 The radiation pattern of an electronic device with this antenna structure configured in free space when radiating antenna reception band signals is shown. Taking the top frame of the electronic device as an example, the first radiator 1 is the top edge of the electronic device, and the third radiator 3 is the side frame of the electronic device. Figure 4 The side facing outwards from the paper is the back cover side of the phone, such as... Figure 4 The radiation pattern of the third radiator 3 shown is more oriented towards the top of electronic devices, which is beneficial for satellite communication.

[0044] Furthermore, the position of the third radiator 3 on the side frame of the electronic device can be reasonably adjusted. In the extending direction of the second radiator 2, the distance between the gap formed by the second radiator 2 and the third radiator 3 and the first radiator 1 is greater than or equal to 45mm. For example, this distance can be 50mm, 53mm, etc. Figure 5 As shown, taking the right hand holding an electronic device as an example, with the screen of the electronic device facing the user, by reasonably setting the distance between the gap formed by the cooperation of the second radiator 2 and the third radiator 3 and the first radiator 1, it is ensured that the right hand can contact the third radiator 3 without obstructing the gap formed by the cooperation of the second radiator 2 and the third radiator 3. Figure 6 As shown, when the third radiator 3 is working, when a finger comes into contact with the third radiator 3, the current from the third radiator 3 is introduced into the human body. Utilizing the absorption and reflection of the finger, the radiation pattern of the third radiator 3 in the Tiantong receiving frequency band radiates more towards the top of the electronic device. Similarly, a similar effect is achieved in the scenario of left-handed communication.

[0045] In some embodiments, the antenna structure further includes a fourth radiator 5, the extension direction of which is the same as that of the second radiator 2. The fourth radiator 5 and the second radiator 2 form a gap at the end opposite to the third radiator 3. The fourth radiator 5 and the first radiator 1 are grounded through the same grounding rib. The fourth radiator 5 can be used to radiate cellular frequency band signals, thereby achieving a compact layout of the antenna structure.

[0046] For example, the fourth radiator 5 can be used to radiate low-frequency band signals, the second radiator 2 can be used to radiate 5G band signals, and the third radiator 3 can be used to radiate satellite band signals and mid-to-high frequency cellular signals. To make reasonable use of the branches of the second radiator 2, the third radiator 3, and the fourth radiator 5, and to increase or decrease the electrical length, thereby expanding the coverage frequency band of the antenna structure, the antenna structure also includes a first slot switch 8 and a second slot switch 9. The first slot switch 8 connects the second radiator 2 and the third radiator 3, and the second slot switch 9 connects the third radiator 3 and the fourth radiator 5. When the third radiator 3 operates in the cellular band, both the first slot switch 8 and the second slot switch 9 are disconnected, and the first antenna switch 4 is disconnected. When the second radiator 2 operates in the 5G band, both the first slot switch 8 and the second slot switch 9 are disconnected. When the fourth radiator 5 operates in the low-frequency band, both the first slot switch 8 and the second slot switch 9 can be turned on, thereby increasing the electrical length and facilitating the tuning configuration of the fourth radiator 5.

[0047] In some embodiments, the antenna structure further includes a metal ground plane 6 and a SAR sensor 7. The first radiator 1, second radiator 2, third radiator 3, and fourth radiator 5 are all located outside the metal ground plane 6. A single, continuous clearance is formed between the second radiator 2 and the metal ground plane 6; that is, the second radiator 2 is not connected to the metal ground plane 6 via a grounding rib, and the second radiator 2 is suspended. Therefore, the SAR sensor 7 can be electrically connected to the second radiator 2 to achieve SAR detection, which is beneficial for the precise SAR tuning of the antenna structure. Furthermore, since the second radiator 2 and the third radiator 3 are located on the same side, the SAR detection accuracy can be further improved when the antenna structure is in satellite communication mode.

[0048] In the above embodiments, the antenna structure also includes a feed point electrically connected to the second radiator 2. The electrical signal fed into the feed point can excite the second radiator 2 to generate a half-wave resonant mode. The half-wave resonant mode covers the N78 and N79 frequency bands. In this way, the radiation efficiency of the N78 and N79 frequency bands can be improved by taking advantage of the fact that the basic resonant mode of the second radiator 2 has a large radiation efficiency.

[0049] When the second radiator 2 radiates through a half-wave resonant mode, such as Figure 7 As shown, currents are excited on the second radiator 2, the third radiator 3, and the fourth radiator 5, generating higher-order modes; and as Figure 8 As shown, the frequency of this higher-order mode is located within the N78 band, resulting in an efficiency dip in the N78 band. Therefore, to address this efficiency dip, the antenna structure also includes a second antenna switch 10. One end of the second antenna switch 10 is grounded, and the other end is electrically connected to the upper frame point of the third radiator 3. This upper frame point is the zero-current point generated on the third radiator 3 when a signal is fed in from the feed point of the second radiator 2. This upper frame point is... Figure 7 The first red dot from the right. When the second radiator 2 operates in the N78 and N79 frequency bands, the second antenna switch 10 is turned on; when the third radiator 3 radiates cellular or satellite frequency signals, the second antenna switch 10 is turned off. Based on the conduction of this second antenna switch 10, higher-order modes located in the N78 frequency band can be eliminated, thus... Figure 9 As shown, the efficiency dip in the N78 band is eliminated, improving the radiation efficiency of the N78 band. Since this efficiency dip is not located in the N79 band, it will not have a negative impact on the N79 band. Based on the N79 band covered by the half-wave resonant mode, it can have high radiation efficiency. The second antenna switch 10 can be connected to ground in series with a 0-ohm resistor, or in other embodiments, the second antenna switch 10 can also be connected to ground in series with a suitable inductor or capacitor.

[0050] Based on the technical solutions disclosed herein, an electronic device is also provided, which may include the antenna structure described in any of the foregoing embodiments. The electronic device may include a mobile phone, with a first radiator 1 located on the top edge of the phone, and a second radiator 2 and a third radiator 3 located on the side edges of the phone.

[0051] 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.

[0052] 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 being used to radiate satellite frequency band signals; The second radiator is arranged perpendicularly to the extension direction of the first radiator, and the second radiator is used to radiate cellular frequency band signals. The third radiator is configured to radiate satellite frequency band signals and cellular frequency band signals by cooperating with the end of the second radiator away from the first radiator to form a gap. A first antenna switch, one end of which is grounded and the other end is electrically connected to the end of the second radiator that is away from the third radiator; When the third radiator operates in the satellite frequency band, the feed point of the second radiator is switched to the off state, the first antenna switch is switched to the on state, and the second radiator and the third radiator are coupled to generate resonance.

2. The antenna structure according to claim 1, characterized in that, The coupling resonant frequency of the second radiator is greater than the operating frequency of the third radiator.

3. The antenna structure according to claim 1, characterized in that, In the extending direction of the second radiator, the distance between the gap formed by the second radiator and the third radiator and the first radiator is greater than or equal to 45 mm.

4. The antenna structure according to claim 1, characterized in that, It also includes a fourth radiator, the extension direction of which is the same as that of the second radiator. The fourth radiator and the second radiator cooperate to form a gap at the end away from the third radiator. The fourth radiator is used to radiate cellular frequency band signals. The fourth radiator and the first radiator are connected to the ground through the same grounding bead position.

5. The antenna structure according to claim 4, characterized in that, It also includes a first slit switch and a second slit switch, wherein the first slit switch is connected to the second radiator and the third radiator, and the second slit switch is connected to the third radiator and the fourth radiator; When the third radiator operates in the cellular frequency band signal, the first and second slit switches are disconnected, and the first antenna switch is disconnected.

6. The antenna structure according to claim 1, characterized in that, The first antenna switch is connected in series with a 0-ohm resistor.

7. The antenna structure according to claim 1, characterized in that, Also includes: The metal floor has the first radiator, the second radiator, and the third radiator all located outside the metal floor, with the second radiator forming a solid clear space between itself and the metal floor. A SAR sensor, which is electrically connected to the second radiator.

8. The antenna structure according to claim 1, characterized in that, The feed signal at the feed point electrically connected to the second radiator excites the second radiator to generate a half-wave resonant mode to cover the N78 and N79 frequency bands.

9. The antenna structure according to claim 8, characterized in that, It also includes a second antenna switch, one end of which is grounded and the other end is electrically connected to the upper frame point of the third radiator. The upper frame point is the feed point of the second radiator. When a signal is fed in, the current generated on the third radiator is zero. When the second radiator operates in the N78 and N79 frequency bands, the second antenna switch is turned on; when the third radiator radiates cellular frequency band signals or satellite frequency band signals, the second antenna switch is turned off.

10. The antenna structure according to claim 9, characterized in that, The second antenna switch is connected in series with a 0-ohm resistor.

11. An electronic device, characterized in that, The antenna structure includes any one of claims 1-10.

Images