WO2021244454A1

WO2021244454A1 - Antenna apparatus and electronic device

Info

Publication number: WO2021244454A1
Application number: PCT/CN2021/097042
Authority: WO
Inventors: 魏鲲鹏; 王国龙; 常乐; 张功磊; 王汉阳
Original assignee: 荣耀终端有限公司
Priority date: 2020-05-30
Filing date: 2021-05-29
Publication date: 2021-12-09
Also published as: CN113745804B; CN113745804A

Abstract

An antenna design solution, relating to a back-to-back (B2B) or face-to-face (F2F) antenna radiation structure. An integrated feed network constructed on the basis of a 3dB bridge is introduced, and a high-isolation dual-antenna of a common mode and a differential mode or a high-isolation hybrid-mode dual antenna of a common mode and a differential mode can be implemented. The advantages of high isolation and a low ECC are provided. The feed network achieves the integration of symmetrical feeding and asymmetrical feeding, and can be implemented on a planar structure, for example, provided on the same PCB layer, reducing the structural complexity of the feed network, and making the engineering implementation easy. In addition, the feeding is performed by means of a single port, and a single port antenna having a reconfigurable pattern can further be constructed by adopting an adjustable phase shifter in the feed network.

Description

Antenna device and electronic equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 202010480880.2, and the application name is "antenna device and electronic equipment" on May 30, 2020, the entire content of which is incorporated into this application by reference.

Technical field

The present invention relates to the field of antenna technology, and in particular to an antenna device used in electronic equipment.

Background technique

With the development of the mobile communication industry, more and more frequency bands and antennas need to be supported by electronic devices such as mobile phones. However, the limited space inside electronic devices such as mobile phones restricts antenna design. How to achieve multiple antennas with high isolation in a compact space has become an urgent problem to be solved.

Summary of the invention

The embodiment of the present invention provides an antenna design scheme, which constructs an integrated feed network based on a 3dB bridge, and provides a dual antenna scheme with a simple structure and easy engineering realization, with high isolation and envelope correlation coefficient (ECC) Inferior advantages.

In the first aspect, an embodiment of the present application provides an electronic device, which may include a first antenna radiator, a second antenna radiator, a first feeding point, a second feeding point, and a feeding network. Wherein, the first feeding point may be located on the first antenna radiator, and the second feeding point may be located on the second antenna radiator. The feeding network may include: a 3dB bridge, a first phase shifter and a second phase shifter. The input port of the 3db bridge can be connected to the first feed port, and the isolated port of the 3dB bridge can be connected to the second feed port. The 0° output port of the 3dB bridge can be connected to the first feed point through the first phase shifter, and the 90° output port of the 3dB bridge can be connected to the second feed point through the second phase shifter.

Among them, the first antenna radiator and the second antenna radiator may be the antenna radiator A, the antenna radiator B, or the antenna radiator 31-A, the antenna radiator 31-B, or the antenna radiator mentioned in the subsequent embodiments. Body 41-A, antenna radiator 41-B. The first feeding point and the second feeding point may be the feeding point A and the feeding point B mentioned in the subsequent embodiments, or the feeding point 33-A, the feeding point 33-B, or the feeding point 43 -A. Feeding point 43-B. The feed network can be the feed network mentioned in the subsequent embodiments, the 3db bridge can be the 3db bridge 25 mentioned in the subsequent embodiments, and the first phase shifter and the second phase shifter can be the ones mentioned in the subsequent embodiments. The mentioned phase shifter 23-A and phase shifter 23-B.

The antenna provided in the first aspect can support a more flexible phase shift to adapt to changing application scenarios through a double phase shifter structure that can be formed by the first phase shifter and the second phase shifter.

In combination with the first aspect, in some embodiments, the phase shift value of the phase shifter 23-A may be greater than 0° and less than 360°, and the phase shift value of the phase shifter 23-B may be greater than 0° and less than 360°.

For example, the phase shifter 23-A is a 90° phase shifter, and the phase shifter 23-B is a 180° phase shifter. Not limited to this, the phase shifter 23-A and the phase shifter 23-B can be other two phase shifters whose phase shift values differ by 90°, for example, the phase shifter 23-A is a 45° phase shifter and a phase shifter. 23-B is a 135° phase shifter. In this way, when a radio frequency signal is input from the feeding port 1, the radio frequency signals fed into the antenna radiator A and the antenna radiator B respectively from the feeding point A and the feeding point B have the same amplitude and a phase difference of 0°, which realizes a symmetrical feeding. Electricity. When the radio frequency signal is input from the feeding port 2, the radio frequency signals of the antenna radiator A and the antenna radiator B are fed into the antenna radiator A and the antenna radiator B, respectively, with the same amplitude and 180° phase difference, which realizes antisymmetric feeding . In this way, the CM line antenna mode and the DM line antenna mode with high isolation can be excited at the same time, or the CM slot antenna mode and the DM slot antenna mode with high isolation can be excited at the same time. Application scenarios of work.

For another example, the phase shifter 23-A is a 90° phase shifter, and the phase shifter 23-B is also a 90° phase shifter. It is not limited to 90°, and the phase shifter 23-A and the phase shifter 23-B may be other phase shifters with the same phase shift value (for example, 45°, 180°, etc.). When a radio frequency signal is input from the feeding port 1, the radio frequency signals fed into the antenna radiator A and the antenna radiator B respectively at the feeding point A and the feeding point B have the same amplitude and a phase difference of 90°. When a radio frequency signal is input from the feeding port 2, the radio frequency signals fed into the antenna radiator A and the antenna radiator B respectively from the feeding point A and the feeding point B have the same amplitude and a phase difference of 90°. In this way, a mixed mode of CM and DM can be excited at the same time, which is applicable to application scenarios that require two antennas in the same frequency band to work in time sharing.

In combination with the first aspect, in some embodiments, both the phase shifter 23-A and the phase shifter 23-B can be phase adjustable phase shifters. In this way, the two phase shifters can realize multiple phase shift combinations and flexibly support more application scenarios, such as the application scenarios mentioned above that require two antennas of the same frequency band to work at the same time or time sharing.

For example, the phase shift value of the phase shifter 23-A can be adjusted to 0°, and the phase shift value of the phase shifter 23-B can be adjusted to 90°. In this way, when a radio frequency signal is input from the feeding port 1, the radio frequency signals fed into the antenna radiator A and the antenna radiator B respectively from the feeding point A and the feeding point B have the same amplitude and a phase difference of 0°, which realizes a symmetrical feeding. Electricity. When the radio frequency signal is input from the feeding port 2, the radio frequency signals of the antenna radiator A and the antenna radiator B are fed into the antenna radiator A and the antenna radiator B, respectively, with the same amplitude and 180° phase difference, which realizes antisymmetric feeding . In this way, the CM line antenna mode and the DM line antenna mode with high isolation can be excited at the same time, or the CM slot antenna mode and the DM slot antenna mode with high isolation can be excited at the same time. Application scenarios of work.

For example, the phase shift value of the phase shifter 23-A can be adjusted to 0°, and the phase shift value of the phase shifter 23-B can be adjusted to 0°. In this mode, when a radio frequency signal is input from the feeding port 1, the radio frequency signals fed into the antenna radiator A and the antenna radiator B respectively from the feeding point A and the feeding point B have the same amplitude and a phase difference of 90°. When a radio frequency signal is input from the feeding port 2, the radio frequency signals fed into the antenna radiator A and the antenna radiator B respectively from the feeding point A and the feeding point B have the same amplitude and a phase difference of 90°. In this way, a mixed mode of CM and DM can be excited at the same time, which is applicable to application scenarios that require two antennas in the same frequency band to work in time sharing.

For example, the phase shifter 23-A can be adjusted to 0°, and the phase shift value of the phase shifter 23-B ranges from 0° to 360°. Further, one of the two feeding ports of the feeding port 1 and the feeding port 2 may not be connected to a feed source but connected to a matching load, that is, the two antenna radiators are fed through the feeding network in a single manner. In this way, an antenna with a reconfigurable (i.e. changeable) pattern can be formed, and the pattern can be changed by changing the phase shift value of the adjustable phase shifter to form a scanning radiation direction.

In a second aspect, an embodiment of the present application provides an electronic device, which may include a first antenna radiator, a second antenna radiator, a first feeding point, a second feeding point, and a feeding network. Wherein, the first feeding point may be located on the first antenna radiator, and the second feeding point may be located on the second antenna radiator. The feed network can include: a 3dB bridge and a phase shifter. The input port of the 3db bridge can be connected to the first feed port, the first feed port can be connected to the first feed, and the isolation port of the 3dB bridge can be connected to the second Feeding port, the second feeding port can be connected to the matched load, the 0° output port of the 3dB bridge can be connected to the first feeding point through the phase shifter, the phase shifter is a phase adjustable phase shifter, the 90 of the 3dB bridge °The output port can be connected to the second feed point.

The antenna provided by the second aspect can be realized as an antenna with a reconfigurable (i.e. changeable) directional pattern. The directional pattern can be changed by connecting the controller of the adjustable phase shifter to change the phase shift value of the adjustable phase shifter. A scanning radiation direction is formed, and the radiation direction can be flexibly adjusted according to the application scenario to ensure good radiation efficiency in different application scenarios.

In combination with the second aspect, in some embodiments, under the premise that the antenna radiator A and the antenna radiator B are realized by the top or bottom metal frame of the electronic device, the controller can be used to play when it is detected that the user is holding the electronic device horizontally. During the game, control the phase shifter to set the phase shift value to 0° or 180°. At this time, combined with the 90° phase difference produced by the 3dB bridge, the following two phase differences can be finally made between the signal fed to the feeding point 33-B and the signal fed to the feeding point 33-A: 90 °, 270°. These two phase differences can respectively cause the radiator to generate the radiation directions shown in the pattern C and the pattern G in FIG. 14, that is, the radiation directions radiating to both sides of the electronic device. Referring to FIG. 14, it can be seen that when the user holds the electronic device with both hands on the horizontal screen and plays the game, the antenna radiation in the direction C and the direction G is not easily affected by the bottom and top of the electronic device held by the user, which is an ideal radiation direction.

With reference to the second aspect, in some embodiments, under the premise that the antenna radiator A and the antenna radiator B are realized by the bottom metal frame of the electronic device, the controller can be used to detect that the user is holding the bottom of the electronic device in a vertical screen. For example, when the user holds the electronic device in the vertical screen to make a video call, and the user holds the electronic device in the vertical screen to turn on the speaker to make a call, the phase shifter is controlled to set the phase shift value to 90°. At this time, combined with the 90° phase difference generated by the 3dB bridge, the signal fed to the feeding point 33-B and the signal fed to the feeding point 33-A can finally have the following phase difference: 180°. This phase difference can cause the radiator to generate the radiation direction shown in the pattern E in FIG. 14, that is, the radiation direction radiating toward the top of the electronic device. Referring to FIG. 14, it can be seen that in the scene where the user holds the bottom of the electronic device vertically, the antenna radiation in the direction E is not easily affected by the bottom of the user's hand holding the electronic device, which is a more ideal radiation direction.

With reference to the second aspect, in some embodiments, under the premise that the antenna radiator A and the antenna radiator B are realized by the bottom metal frame of the electronic device, the controller can be used to detect that the user is holding the bottom of the electronic device in a vertical screen. For example, when the user holds the electronic device in the vertical screen to make a video call, or the user holds the electronic device in the vertical screen to turn on the speaker to make a call, the phase shifter is controlled to set the phase shift value to 270°. At this time, combined with the 90° phase difference generated by the 3dB bridge, the signal fed to the feeding point 33-B and the signal fed to the feeding point 33-A can finally have the following phase difference: 0°. This phase difference can cause the radiator to generate the radiation direction shown in the directional diagram A in FIG. 14, that is, the radiation direction radiating to the bottom of the electronic device. Referring to FIG. 14, it can be seen that in the scene where the user holds the electronic device vertically, the antenna radiation in the direction A is not easily affected by the top of the electronic device held by the user, and is an ideal radiation direction.

With reference to the second aspect, in some embodiments, under the premise that the antenna radiator A and the antenna radiator B are realized by the top metal frame of the electronic device, the controller can be used to detect that the user is holding the bottom of the electronic device in the vertical screen. For example, when the user holds the electronic device in the vertical screen to make a video call, or the user holds the electronic device in the vertical screen to turn on the speaker to make a call, the phase shifter is controlled to set the phase shift value to 270°. At this time, combined with the 90° phase difference generated by the 3dB bridge, the signal fed to the feeding point 33-B and the signal fed to the feeding point 33-A can finally have the following phase difference: 0°. This phase difference can cause the radiator to produce a radiation direction that radiates to the top of the electronic device. Therefore, in a scenario where the user holds the bottom of the electronic device vertically, the radiation direction is not easily affected by the bottom of the electronic device held by the user, and is a more ideal radiation direction.

In combination with the second aspect, in some embodiments, under the premise that the antenna radiator A and the antenna radiator B are realized by the top metal frame of the electronic device, the controller can be used to detect that the user is holding the top of the electronic device in the vertical screen. For example, when the user holds the electronic device in the vertical screen to make a video call, and the user holds the electronic device in the vertical screen to turn on the speaker to make a call, the phase shifter is controlled to set the phase shift value to 90°. At this time, combined with the 90° phase difference generated by the 3dB bridge, the signal fed to the feeding point 33-B and the signal fed to the feeding point 33-A can finally have the following phase difference: 180°. This phase difference can cause the radiator to produce a radiation direction that radiates to the bottom of the electronic device. Therefore, in the scene where the user holds the top of the electronic device vertically, the radiation direction is not easily affected by the top of the electronic device held by the user, and is a more ideal radiation direction.

With reference to the second aspect, in some embodiments, under the premise that the antenna radiator A and the antenna radiator B are realized by the top or bottom metal frame of the electronic device, the controller can be used to control the The phase shift range of the phase shifter is: 0°～360°, that is, the directional pattern can be unlimited.

In combination with the second aspect, in some embodiments, the feed sources may be connected to the feed port 1 and the feed port 2 respectively to form an antenna of the dual feed port, and the pattern can also be reconstructed.

In combination with the first aspect or the second aspect, in some embodiments, the first antenna radiator and the second antenna radiator may adopt a back-to-back (B2B) form. Specifically, one end of the first antenna radiator is grounded and the other end is open; one end of the second antenna radiator is grounded and the other end is open; the ground end of the first antenna radiator and the ground end of the second antenna radiator are close to and opposite to each other. It is assumed that the open end of the first antenna radiator and the open end of the second antenna radiator are located far away and opposite to each other.

In combination with the first aspect or the second aspect, in some embodiments, the first ground stub connected to the ground end of the first antenna radiator and the second ground stub connected to the ground end of the second antenna radiator can be combined into one ground stub. , The ground terminal of the first antenna radiator and the ground terminal of the second antenna radiator can be connected, or the first antenna radiator and the second antenna radiator can be combined into an integrated radiator, the first antenna radiator, The second antenna radiator may be two parts of an integrated radiator respectively.

In combination with the first aspect or the second aspect, in some embodiments, the back-to-back (B2B) form of dual radiators can be realized by the metal frame and the floor of the electronic device. The first antenna radiator and the second antenna radiator may be two segments of the metal frame, respectively, and the two segments can be formed by opening a gap on the metal frame. The first grounding stub and the second grounding stub may be formed by a hollowed-out floor, specifically, a strip-shaped floor formed by the hollowed-out floor and extending to the suspended metal frame. Two gaps can be opened on the metal frame, and the suspended metal frame between the two gaps can form the aforementioned integrated radiator.

In combination with the first aspect or the second aspect, in some embodiments, the first antenna radiator and the second antenna radiator may adopt a face-to-face (F2F) form. Specifically, one end of the first antenna radiator is grounded and the other end is open, one end of the second antenna radiator is grounded, and the other end is open, and the open end of the first antenna radiator and the open end of the second antenna radiator are close to and opposite to each other. It is assumed that there is a first gap between the open end of the first antenna radiator and the open end of the second antenna radiator, and the ground end of the first antenna radiator and the ground end of the second antenna radiator are located far away and opposite to each other.

In combination with the first aspect or the second aspect, in some embodiments, the first antenna radiator, the second antenna radiator, the first ground stub connected to the ground terminal of the first antenna radiator, and the ground terminal of the second antenna radiator The connected second grounding branch and the floor of the electronic device can be enclosed to form a groove.

In combination with the first aspect or the second aspect, in some embodiments, the face-to-face (F2F) dual radiator can be realized by the metal frame and the floor of the electronic device. The groove is a groove between the metal frame and the floor, which can be formed by hollowing out the floor. The two ends of the groove are closed. The floor extends to the metal frame on both sides of the groove to form the first grounding branch and the second grounding branch. The first slot can be opened on the metal frame to connect the slot with the external free space. A section of the metal frame between the first slot and one closed end of the slot can constitute the first antenna radiator, and the first slot is connected to the other closed end of the slot. A section of the metal frame in between can constitute the second antenna radiator. The first slit may be located in the middle of one side of the groove.

In combination with the first aspect or the second aspect, in some embodiments, the feeding network may further include: a first matching network, a second matching network, the first matching network is connected between the first feeding point and the first phase shifter In between, the second matching network is connected between the second feeding point and the second phase shifter. The first matching network and the second matching network may be the first-level matching network mentioned in the subsequent embodiments.

In combination with the first aspect or the second aspect, in some embodiments, the feeding network may further include: a third matching network and a fourth matching network, the third matching network is connected to the input port of the 3dB bridge and the first feeding port In between, the fourth matching network is connected between the isolation port of the 3dB bridge and the second feed port. The third matching network and the fourth matching network may be the second-level matching network mentioned in the subsequent embodiments.

In a third aspect, an embodiment of the present application provides an electronic device, which may include a first antenna radiator, a second antenna radiator, a first feeding point, a second feeding point, and a feeding network. Wherein, the first feeding point may be located on the first antenna radiator, and the second feeding point may be located on the second antenna radiator. The first antenna radiator and the second antenna radiator may adopt a back-to-back (B2B) form. For details, please refer to the description in the previous content, which will not be repeated here.

The feeding network may include: a first matching network, a second matching network, a 3dB bridge, a third matching network, and a fourth matching network. Among them, the first matching network can be connected between the first feeding point and the 3dB bridge, the third matching network can be connected between the 3dB bridge and the first feeding port, and the first feeding port can be used to connect to the first Feed. The second matching network can be connected between the second feed point and the 3dB bridge, the fourth matching network can be connected between the 3dB bridge and the second feed port, and the second feed port can be used to connect to the second feed. . The feed network may further include a phase shifter, which may be connected between the first matching network and the 3dB bridge, and the phase shifter may be used to generate a 90° phase shift.

In a fourth aspect, an embodiment of the present application provides an electronic device, which may include a first antenna radiator, a second antenna radiator, a first feeding point, a second feeding point, and a feeding network. Wherein, the first feeding point may be located on the first antenna radiator, and the second feeding point may be located on the second antenna radiator. The first antenna radiator and the second antenna radiator may adopt a back-to-back (B2B) form. For details, please refer to the description in the previous content, which will not be repeated here.

The feeding network may include: a first matching network, a second matching network, a 3dB bridge, a third matching network, and a fourth matching network. Among them, the first matching network can be connected between the first feeding point and the 3dB bridge, the third matching network can be connected between the 3dB bridge and the first feeding port, and the first feeding port can be used to connect to the first Feed. The second matching network can be connected between the second feed point and the 3dB bridge, the fourth matching network can be connected between the 3dB bridge and the second feed port, and the second feed port can be used to connect to the second feed. .

In a fifth aspect, embodiments of the present application provide an electronic device, which may include a first antenna radiator, a second antenna radiator, a first feeding point, a second feeding point, and a feeding network. Wherein, the first feeding point may be located on the first antenna radiator, and the second feeding point may be located on the second antenna radiator. The first antenna radiator and the second antenna radiator may adopt a back-to-back (B2B) form. For details, please refer to the description in the previous content, which will not be repeated here.

The feeding network may include: a first matching network, a second matching network, a 3dB bridge, a third matching network, and a fourth matching network, wherein the first matching network can be connected between the first feeding point and the 3dB bridge In between, the third matching network can be connected between the 3dB bridge and the first feed port. The second matching network can be connected between the second feeding point and the 3dB bridge, and the fourth matching network can be connected between the 3dB bridge and the second feeding port. The first feed port can be connected to the first feed source, and the second feed port can be connected to a matching load. The feed network may further include a phase adjustable phase shifter, and the phase shifter may be connected between the first matching network and the 3dB bridge.

In a sixth aspect, an embodiment of the present application provides an electronic device, which may include a first antenna radiator, a second antenna radiator, a first feeding point, a second feeding point, and a feeding network. Wherein, the first feeding point may be located on the first antenna radiator, and the second feeding point may be located on the second antenna radiator. The first antenna radiator and the second antenna radiator may adopt a face-to-face (F2F) form. For details, please refer to the description in the previous content, which will not be repeated here.

In a seventh aspect, an embodiment of the present application provides an electronic device, which may include a first antenna radiator, a second antenna radiator, a first feeding point, a second feeding point, and a feeding network. Wherein, the first feeding point may be located on the first antenna radiator, and the second feeding point may be located on the second antenna radiator. The first antenna radiator and the second antenna radiator may adopt a face-to-face (F2F) form. For details, please refer to the description in the previous content, which will not be repeated here.

The feeding network may include: a first matching network, a second matching network, a 3dB bridge, a third matching network, and a fourth matching network. Wherein, the first matching network is connected between the first feeding point and the 3dB bridge, the third matching network is connected between the 3dB bridge and the first feeding port; the second matching network is connected between the second feeding point and the Between the 3dB bridges, the fourth matching network is connected between the 3dB bridge and the second feed port. The first feed port is connected to the first feed source, and the second feed port is connected to the matching load, or the first feed port is connected to the matching load, and the second feed port is connected to the second feed source. The feed network also includes a phase adjustable phase shifter, which is connected between the second matching network and the 3dB bridge or between the first matching network and the 3dB bridge.

In an eighth aspect, embodiments of the present application provide an electronic device, which may include a floor, a first conductive plate, a second conductive plate, a first feeding point, a second feeding point, and a feeding network. Wherein, the first conductive plate, the second conductive plate and the floor are arranged in parallel. The first conductive plate may have a set of opposite sides: a first side and a second side. The second conductive plate may have a set of opposite sides: a third side and a fourth side. The first side and the third side can be arranged opposite to each other in parallel, and the third side is closer to the first side than the fourth side. The first side is open, the second side is connected to the first grounding stub, the third side is open, the fourth side is connected to the second grounding stub, and the first grounding stub and the second grounding stub are connected to the floor. The first feeding point may be located on the first conductive plate, and the second feeding point may be located on the second conductive plate.

The feeding network may include: a first matching network, a second matching network, a 3dB bridge, a third matching network, and a fourth matching network, wherein the first matching network can be connected between the first feeding point and the 3dB bridge At the same time, the third matching network can be connected between the 3dB bridge and the first feed port, and the first feed port is used to connect to the first feed source. The second matching network can be connected between the second feed point and the 3dB bridge, the fourth matching network can be connected between the 3dB bridge and the second feed port, and the second feed port can be used to connect to the second feed. . The feed network may also include a phase shifter, which may be connected between the first matching network and the 3dB bridge, and the phase shifter may be used to generate a 90° phase shift.

In a ninth aspect, an embodiment of the present application provides an electronic device, which may include a floor, a first conductive plate, a second conductive plate, a first feeding point, a second feeding point, and a feeding network. Wherein, the first conductive plate, the second conductive plate and the floor are arranged in parallel. The first conductive plate may have a set of opposite sides: a first side and a second side. The second conductive plate may have a set of opposite sides: a third side and a fourth side. The first side and the third side can be arranged opposite to each other in parallel, and the third side is closer to the first side than the fourth side. The first side is open, the second side is connected to the first grounding stub, the third side is open, the fourth side is connected to the second grounding stub, and the first grounding stub and the second grounding stub are connected to the floor. The first feeding point may be located on the first conductive plate, and the second feeding point may be located on the second conductive plate.

The feeding network may include: a first matching network, a second matching network, a 3dB bridge, a third matching network, and a fourth matching network, wherein the first matching network can be connected between the first feeding point and the 3dB bridge Meanwhile, the third matching network can be connected between the 3dB bridge and the first feed port, and the first feed port can be used to connect to the first feed source. The second matching network can be connected between the second feed point and the 3dB bridge, the fourth matching network can be connected between the 3dB bridge and the second feed port, and the second feed port can be used to connect to the second feed. .

In a tenth aspect, an embodiment of the present application provides an electronic device, which may include a floor, a first conductive plate, a second conductive plate, a first feeding point, a second feeding point, and a feeding network. Wherein, the first conductive plate, the second conductive plate and the floor are arranged in parallel. The first conductive plate may have a set of opposite sides: a first side and a second side. The second conductive plate may have a set of opposite sides: a third side and a fourth side. The first side and the third side can be arranged opposite to each other in parallel, and the third side is closer to the first side than the fourth side. The first side is open, the second side is connected to the first grounding stub, the third side is open, the fourth side is connected to the second grounding stub, and the first grounding stub and the second grounding stub are connected to the floor. The first feeding point may be located on the first conductive plate, and the second feeding point may be located on the second conductive plate.

The feeding network may include: a first matching network, a second matching network, a 3dB bridge, a third matching network, and a fourth matching network, wherein the first matching network is connected between the first feeding point and the 3dB bridge , The third matching network is connected between the 3dB bridge and the first feeding port. The second matching network is connected between the second feeding point and the 3dB bridge, and the fourth matching network is connected between the 3dB bridge and the second feeding port. The first feed port is connected to the first feed source, the second feed port is connected to the matching load, and the second feed port is connected to the second feed source. The feed network also includes a phase adjustable phase shifter, which can be connected between the first matching network and the 3dB bridge.

In an eleventh aspect, an embodiment of the present application provides an electronic device. The electronic device may include a floor, a first conductive plate, a second conductive plate, a first feeding point, a second feeding point, and a feeding network. Wherein, the first conductive plate, the second conductive plate and the floor are arranged in parallel. The first conductive plate has a set of opposite sides: a first side and a second side, and the second conductive plate has a set of opposite sides: a third side and a fourth side, and a first side and a third side. The sides are arranged in parallel, and the third side is closer to the first side than the fourth side. The first side is connected to the first grounding branch, the second side is open, the third side is open, and the fourth side is connected The second grounding stub, the first grounding stub and the second grounding stub are connected to the floor.

The feeding network may include: a first matching network, a second matching network, a 3dB bridge, a third matching network, and a fourth matching network, wherein the first matching network can be connected between the first feeding point and the 3dB bridge At the same time, the third matching network can be connected between the 3dB bridge and the first feed port, and the first feed port is used to connect to the first feed source. The second matching network can be connected between the second feed point and the 3dB bridge, the fourth matching network can be connected between the 3dB bridge and the second feed port, and the second feed port can be used to connect to the second feed. . The feed network may further include a phase shifter, which may be connected between the first matching network and the 3dB bridge, and the phase shifter may be used to generate a 90° phase shift.

In a twelfth aspect, an embodiment of the present application provides an electronic device, which may include a floor, a first conductive plate, a second conductive plate, a first feeding point, a second feeding point, and a feeding network. Wherein, the first conductive plate, the second conductive plate and the floor are arranged in parallel. The first conductive plate has a set of opposite sides: a first side and a second side, and the second conductive plate has a set of opposite sides: a third side and a fourth side, and a first side and a third side. The sides are arranged in parallel, and the third side is closer to the first side than the fourth side. The first side is connected to the first grounding branch, the second side is open, the third side is open, and the fourth side is connected The second grounding stub, the first grounding stub and the second grounding stub are connected to the floor.

In a thirteenth aspect, an embodiment of the present application provides an electronic device, which may include a floor, a first conductive plate, a second conductive plate, a first feeding point, a second feeding point, and a feeding network. Wherein, the first conductive plate, the second conductive plate and the floor are arranged in parallel. The first conductive plate has a set of opposite sides: a first side and a second side, and the second conductive plate has a set of opposite sides: a third side and a fourth side, and a first side and a third side. The sides are arranged in parallel, and the third side is closer to the first side than the fourth side. The first side is connected to the first grounding branch, the second side is open, the third side is open, and the fourth side is connected The second grounding stub, the first grounding stub and the second grounding stub are connected to the floor.

For the content not mentioned in the third aspect to the thirteenth aspect, please refer to the related content in the first aspect and the second aspect, and will not repeat them.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will describe the drawings that need to be used in the embodiments of the present application.

FIG. 1 is a schematic diagram of the structure of an electronic device on which the antenna design solution provided by the present application is based;

Figure 2A is a schematic diagram of the B2B CM structure provided by this application;

Fig. 2B is a schematic diagram of the current and electric field distribution of B2B CM;

Figure 3A is a schematic diagram of the B2B DM structure provided by this application;

Fig. 3B is a schematic diagram of the current and electric field distribution of B2B DM;

Figure 4A is a schematic diagram of the F2F CM structure provided by this application;

Fig. 4B is a schematic diagram of the current, electric field, and magnetic current distribution of F2F CM;

Figure 5A is a schematic diagram of the F2F DM structure provided by this application;

Fig. 5B is a schematic diagram of the current, electric field, and magnetic current distribution of F2F DM;

FIG. 6 is a schematic structural diagram of a dual antenna solution provided by an embodiment of the application;

FIG. 7A is a schematic structural diagram of the dual antenna solution provided in the first embodiment;

7B is a design prototype diagram of the dual antenna solution provided in the first embodiment in the whole machine;

FIG. 7C is a schematic diagram of the structure of the feed network adopted in the dual antenna solution provided in the first embodiment; FIG.

8A-8E are a series of simulation diagrams of the antenna provided in Embodiment 1;

9A-9B show simulation diagrams of the antenna after removing the feeder network used in Embodiment 1;

10 is a schematic diagram of the structure of the feed network adopted in the dual antenna solution provided in the second embodiment;

11A-11G are schematic diagrams of the distribution of current on the antenna radiator at different instants under a phase difference of 90°;

12A-12E are a series of simulation diagrams of the antenna provided in Embodiment 2;

FIG. 13 is a schematic structural diagram of a feed network used in the antenna solution provided in the third embodiment;

FIG. 14 shows the radiation directions of the antenna provided in the third embodiment under different phase differences;

15A is a schematic structural diagram of a dual-antenna solution provided in the fourth embodiment;

15B is a design prototype diagram of the dual antenna solution provided in the fourth embodiment in the whole machine;

Figures 16A-16B show two asymmetric antenna radiation structures;

Figures 17A-17B show two asymmetric structures for feeding positions;

Figures 18A-18D show a variety of PIFA dual antenna forms.

detailed description

The embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention.

The technical solution provided in this application is applicable to electronic devices using one or more of the following communication technologies: Bluetooth (BT) communication technology, global positioning system (GPS) communication technology, wireless fidelity (wireless fidelity, Wi -Fi) communication technology, global system for mobile communications (GSM) communication technology, wideband code division multiple access (WCDMA) communication technology, long term evolution (LTE) communication technology , 5G communication technology, SUB-6G communication technology and other future communication technologies, etc. In this application, electronic devices can be mobile phones, tablet computers, personal digital assistants (personal digital assistants, PDAs), customer premise equipment (CPE), wearable products, Internet of things (IoT) terminals ,etc.

Fig. 1 exemplarily shows the internal environment of the electronic device on which the antenna design solution provided in this application is based. As shown in FIG. 1, the electronic device 10 may include: a glass cover 13, a display 15, a printed circuit board PCB17, a housing 19 and a back cover 21.

Among them, the glass cover 13 can be arranged close to the display 15 and can be mainly used to protect the display 15 from dust.

Among them, the printed circuit board PCB17 can be a FR-4 dielectric board, a Rogers dielectric board, or a mixed dielectric board of Rogers and FR-4, and so on. Here, FR-4 is a code name for the grade of flame-resistant materials, and Rogers dielectric board is a high-frequency board. A metal layer may be provided on the side of the printed circuit board PCB17 close to the housing 19, and the metal layer may be formed by etching metal on the surface of the PCB17. The metal layer can be used to ground the electronic components carried on the printed circuit board PCB17 to prevent users from getting electric shock or equipment damage. This metal layer can be called a PCB floor.

Among them, the shell 19 mainly plays a supporting role of the whole machine. The housing 19 may include a metal frame 11, and the metal frame 11 may be formed of a conductive material such as metal. The metal frame 11 can extend around the periphery of the PCB 17 and the display 15 to help fix the display 15. In one implementation, the metal frame 11 made of a metal material can be directly used as the metal frame of the electronic device 10 to form the appearance of the metal frame, which is suitable for a metal ID. In another implementation, the outer surface of the metal frame 11 may also be provided with a non-metal frame, such as a plastic frame, to form the appearance of a non-metal frame, which is suitable for a non-metal ID.

The metal frame 11 can be divided into 4 parts, which can be named as the bottom edge, the top edge and the two sides according to their respective positions in the electronic device. The top edge can be arranged on the top of the electronic device 10, and the bottom edge can be arranged on the bottom of the electronic device 10. The two sides can be respectively arranged on both sides of the electronic device 10. The top of the electronic device 10 may be provided with a front camera (not shown), an earpiece (not shown), a proximity light sensor (not shown) and other devices. The bottom of the electronic device 10 may be provided with a USB charging port (not shown), a microphone (not shown), and the like. The side of the electronic device 10 may be provided with a volume adjustment button (not shown) and a power button (not shown).

Wherein, the back cover 21 may be a back cover made of a non-metallic material, such as a glass back cover, a plastic back cover, etc., or a back cover made of a metal material.

FIG. 1 only schematically shows some components included in the electronic device 10, and the actual shape, actual size, and actual structure of these components are not limited by FIG. 1.

The embodiment of the present application constructs an integrated feed network based on a 3dB bridge, and provides a dual-antenna solution with a simple structure and easy engineering implementation. It has the advantages of high isolation and low envelope correlation coefficient (ECC). It is not limited to the exemplary mobile phones, tablet computers, PDAs, CPEs, wearable products, IoT terminals, etc. in FIG. wireless fidelity, Wi-Fi) routers, satellite communication terminals, etc.

First, introduce several antenna modes involved in the dual antenna solution provided by the embodiment of the present application.

1. Common mode (CM) line antenna mode

As shown in FIG. 2A, the antenna 101 includes a horizontal stub 103 and a vertical stub 102. The vertical stub 102 can be arranged in the middle of the antenna 101, and the two vertical stubs 102 shown in the figure can also be combined into one vertical grounded stub. The vertical stub 102 can be connected to the floor, so it can also be called a grounding stub. The two horizontal branches on both sides of the vertical branch 102 can be connected to the positive feeding point, and the phase difference of the radio frequency signals fed into the two horizontal branches is 0°. This feeding structure can be called symmetric feeding. Since the two grounding branches are arranged or integrated into one body at a close distance, the antenna 101 can be referred to as a back-to-back (B2B) antenna.

FIG. 2B shows the current and electric field distribution of the wire antenna 101. As shown in FIG. 2B, the currents on the horizontal stubs 103 are reversed on both sides of the vertical stubs 102, showing a symmetrical distribution; the currents on the vertical stubs 102 are distributed in the same direction. As shown in FIG. 2B, the electric field is distributed in the same direction on both sides of the vertical branch 102. This antenna mode excited by the feeding method shown in FIG. 2A on the horizontal stubs on both sides of the vertical stubs 102 may be referred to as a CM line antenna mode. The current and electric field of the CM line antenna mode can be generated by the two horizontal branches of the antenna 101 on both sides of the vertical branch 102 as 1/4 wavelength antennas.

2. Differential mode (DM) line antenna mode

The structure of the antenna 101 can be referred to as shown in FIG. 2A. The difference is that, as shown in Figure 3A, the horizontal stub on one side of the vertical stub 105 can be connected to the positive feed point, and the horizontal stub on the other side of the vertical stub 105 can be connected to the negative feed point to feed these two horizontal branches. The phase difference of the radio frequency signal is 180°. This kind of feeding structure can be called anti-symmetric feeding.

FIG. 3B shows the current and electric field distribution of the antenna 101. As shown in FIG. 3B, the currents on the horizontal stubs 106 are in the same direction, and the currents on the vertical stubs 105 are reversed. The antenna mode excited by the feeding method shown in FIG. 3A on the horizontal stubs on both sides of the vertical stubs 102 can be referred to as a DM line antenna mode. The current and electric field of the DM line antenna mode can be generated by the entire horizontal branch 103 as a 1/2-wavelength antenna.

3. Common mode (CM) slot antenna mode

As shown in FIG. 4A, the antenna 105 may include: a horizontal stub 106 and two vertical stubs 107 arranged at both ends of the horizontal stub 106. The vertical stub 107 can be connected to the floor, so it can also be called a grounding stub. The horizontal branches 106, the vertical branches 107 and the floor can be enclosed to form a groove 108. An opening 109 may be provided in the middle of the horizontal branch 106. The horizontal branch on one side of the opening 109 can be connected to the positive feeding point, and the horizontal branch on the other side of the opening 109 can be connected to the negative feeding point. The phase difference of the RF signals fed into the two horizontal branches is 180°. This kind of feeding structure can be called anti-symmetric feeding. Since the open ends of the horizontal branches 106 on both sides of the opening 109 are located close to each other, the antenna 105 can be called a face-to-face (F2F) antenna.

FIG. 4B shows the current, electric field, and magnetic current distribution of the antenna 105. As shown in FIG. 4B, the currents on the horizontal stubs 106 are in the same direction, and the currents on the two vertical stubs 107 at both ends of the horizontal stubs 106 are opposite, and the electric field and magnetic current are distributed symmetrically and oppositely on the slot 108. The antenna pattern shown in FIG. 4B can be referred to as a CM slot antenna pattern. That is, the slot formed by the horizontal branch 106, the vertical branch 107 and the floor can be excited to produce the CM slot antenna mode. The electric field, current, and magnetic current shown in FIG. 4B can be respectively referred to as the electric field, current, and magnetic current of the CM slot antenna mode. The current and electric field of the CM slot antenna mode are generated by the slots on both sides of the opening 109 operating in the 1/4 wavelength mode.

4. Differential mode (DM) slot antenna mode

The structure of the antenna 105 can be referred to as shown in FIG. 4A. The difference is that, as shown in FIG. 5A, the horizontal branches on both sides of the opening 109 can be connected to the positive feeding point, and the phase difference of the radio frequency signals fed into the two horizontal branches is 0°. This feeding structure can be called symmetric feeding.

FIG. 5B shows the current, electric field, and magnetic current distribution of the antenna 105. As shown in FIG. 5B, the current on the horizontal branch 106 is reversed on both sides of the opening 109, the current on the two vertical branches 107 at both ends of the horizontal branch 106 are in the same direction, and the electric field and magnetic current are on both sides of the middle position of the slot antenna 101. Presents the same direction distribution. The antenna pattern shown in FIG. 5B may be referred to as a DM slot antenna pattern. That is, the slot formed by the horizontal branch 106, the vertical branch 107, and the floor can be excited to generate the DM slot antenna mode. The electric field, current, and magnetic current shown in FIG. 4B can be respectively referred to as the electric field, current, and magnetic current of the DM slot antenna mode. The current and electric field of the DM slot antenna mode are generated by the entire slot 108 working in the 1/2 wavelength mode.

In the above-mentioned antenna modes, the horizontal branch and the vertical branch do not limit the spatial position of the corresponding branch to be horizontal or vertical, but are simply named according to the schematic diagram in the figure.

Based on the foregoing several antenna modes, the general design concept of the dual antenna solution provided by the embodiments of the present application will be described below. As shown in Figure 6, the dual antenna design can be composed of two antenna radiators and an integrated feed network connecting the two antenna radiators.

The two segments of antenna radiator may include antenna radiator A and antenna radiator B. The dual antenna form of the antenna radiator A and the antenna radiator B can be a back-to-back (B2B) form, which can be excited into a CM line antenna mode and a DM line antenna mode. The dual antenna form of the antenna radiator A and the antenna radiator B can also be a face-to-face (F2F) form, which is enclosed with the floor to form a slot, which can be excited to produce a CM slot antenna pattern and a DM slot antenna pattern.

Among them, the integrated feed network may include: a first-level matching network 21-A, a first-level matching network 21-B, a 3dB bridge 25, a second-level matching network 27-A, and a second-level matching network 27-B . The first-stage matching network 21-A is connected between the antenna radiator A and the 3dB bridge 25, and the second-stage matching network 27-A is connected between the 3dB bridge 25 and the feed source 1. The first-level matching network 21-B is connected between the antenna radiator B and the 3dB bridge 25, and the second-level matching network 27-B is connected between the 3dB bridge 25 and the feed source 2. Specifically, the first-level matching network 21-A may be connected to the feeding point A on the antenna radiator A. Specifically, the first-level matching network 21-B may be connected to the feeding point B on the antenna radiator B. Further, the integrated feed network may also include a phase shifter 23-A and a phase shifter 23-B. The phase shifter 23-A can be connected between the first-stage matching network 21-A and the 3dB bridge 25. The phase shifter 23-B may be connected between the first-stage matching network 21-B and the 3dB bridge 25.

Among them, the feed port 1 of the feed source 1 and the feed port 2 of the feed source 2 are dual-antenna feed ports with natural high isolation.

Among them, the 3dB bridge 25 includes four ports: port A, port B, port C and port D. Port A is an input port, port B is an isolated port, port C is a 0° output port, and port D is a 90° output port. The 3dB bridge 25 has the function of equal power distribution and improved isolation between ports, and equally divides the radio frequency power fed from the feeding port 1 or the feeding port 2 to the feeding point A and the feeding point B. According to the transmission characteristics of the 3dB bridge 25, when a radio frequency signal is input from the port A, the signal output by the port C and the signal output by the port D have the same amplitude and a phase difference of 90°. When a radio frequency signal is input from port B, the signal output by port C and the signal output by port D are also equal in amplitude and have a phase difference of 90°. Further, the phase shifter 23-A and the phase shifter 23-B can adjust the phase of the input signals of the feeding point A and the feeding point B to achieve the purpose of changing the antenna mode. The 3dB electric bridge 25 can be constructed with a transmission line on the PCB 17, or can be constructed with a lumped capacitance or inductance, or implemented with a commercial chip or module. The phase shifter 23-A and the phase shifter 23-B may adopt commercial chips or modules to realize phase shifting. The reactance caused by the non-ideality of the transmission line will also introduce a phase shift, but this transmission line structure is not a phase shifter in this application.

Among them, the first-stage matching network 21-A, the first-stage matching network 21-B, the second-stage matching network 27-A, and the second-stage matching network 27-B may be composed of capacitors and inductors. The first-stage matching network 21-A and the first-stage matching network 21-B can be used to match the input impedance of each antenna, which is beneficial to improve isolation.

Based on the aforementioned antenna modes, the dual-antenna design scheme shown in Figure 6 can work as follows: For the B2B dual-antenna form, when feed point A and feed point B feed antenna radiator A and antenna radiator B, respectively When the RF signal amplitude is equal and the phase difference is 0°, symmetrical feeding is realized. The CM line antenna mode can be excited on the two radiators of antenna radiator A and antenna radiator B; for the B2B dual antenna form, when When the radio frequency signals fed into the antenna radiator A and the antenna radiator B at the feeding point A and the feeding point B are equal in amplitude and 180° phase difference, anti-symmetric feeding is realized. B. The two radiators can excite the DM line antenna mode. For the F2F dual-antenna form, when the RF signals fed into the antenna radiator A and the antenna radiator B at the feed point A and the feed point B have the same amplitude and a phase difference of 0°, a symmetrical feeding is realized and the antenna can be excited The slot formed by the radiator A, antenna radiator B and the floor produces a DM slot antenna pattern; for the F2F dual antenna form, when the feed point A and the feed point B feed the radio frequency of the antenna radiator A and the antenna radiator B respectively When the signal amplitude is equal and the phase difference is 180°, antisymmetric feeding is realized, which can excite the slot formed by the antenna radiator A, the antenna radiator B and the floor to produce a CM slot antenna mode.

The following embodiments will describe the structure of the 3dB bridge and phase shifter that realizes this working mode, which will not be expanded here.

In addition, for the B2B dual-antenna form, when the radio frequency signals fed into the antenna radiator A and the antenna radiator B at the feed point A and the feed point B are equal, and the phase difference is neither 0° nor 180°, the antenna The radiator A and the antenna radiator B can excite the mixed mode of the CM line antenna and the DM line antenna. For the F2F dual-antenna form, when the RF signals fed into the antenna radiator A and the antenna radiator B at the feed point A and the feed point B have the same amplitude and the phase difference is neither 0° nor 180°, the antenna radiator A. Antenna radiator B. The two radiators can excite the mixed mode of CM slot antenna and DM slot antenna. The following embodiments will introduce this hybrid mode in detail, and will not be expanded here.

It can be seen that the dual-antenna solution based on 3dB bridge feeding provided by the embodiment of the present application can realize high-isolation CM/DM dual-antenna or high-isolation mixed-mode dual-antenna. In addition, the following embodiments will also introduce how to change the antenna mode through the phase shifter, so as to realize the adjustment of isolation, radiation efficiency, and pattern, and even expand to a single antenna or double antenna with a reconfigurable pattern.

In addition, the double phase shifter structure composed of the phase shifter 23-A and the phase shifter 23-B can support more flexible phase shifting to adapt to changing application scenarios. This will be explained in detail below.

One way is that the phase shifter 23-A can be used to shift the phase by 0°, and the phase shifter 23-B can be used to shift the phase by 90°. In this mode, when a radio frequency signal is input from the feed port 1, the radio frequency signals fed into the antenna radiator A and the antenna radiator B respectively from the feed point A and the feed point B have the same amplitude and a phase difference of 0°. Symmetrical feeding. When the radio frequency signal is input from the feeding port 2, the radio frequency signals of the antenna radiator A and the antenna radiator B are fed into the antenna radiator A and the antenna radiator B, respectively, with the same amplitude and 180° phase difference, which realizes antisymmetric feeding . In this way, the CM line antenna mode and the DM line antenna mode with high isolation can be excited at the same time, or the CM slot antenna mode and the DM slot antenna mode with high isolation can be excited at the same time. Application scenarios of work.

One way is that the phase shifter 23-A can be used to shift the phase by 0°, and the phase shifter 23-B can also be used to shift the phase by 0°. In this mode, when a radio frequency signal is input from the feeding port 1, the radio frequency signals fed into the antenna radiator A and the antenna radiator B respectively from the feeding point A and the feeding point B have the same amplitude and a phase difference of 90°. When a radio frequency signal is input from the feeding port 2, the radio frequency signals fed into the antenna radiator A and the antenna radiator B respectively from the feeding point A and the feeding point B have the same amplitude and a phase difference of 90°. In this way, a mixed mode of CM and DM can be excited at the same time, which is applicable to application scenarios that require two antennas in the same frequency band to work in time sharing.

One way is that both the phase shifter 23-A and the phase shifter 23-B can be phase adjustable phase shifters. In this way, the two phase shifters can realize multiple phase shift combinations and flexibly support more application scenarios, such as the application scenarios mentioned above that require two antennas of the same frequency band to work at the same time or time sharing.

One way is that of the two phase shifters, the phase shifter 23-A and the phase shifter 23-B, one of the phase shifters is an adjustable phase shifter, and the phase shift value of the other phase shifter is 0° . In this way, multiple application scenarios can also be flexibly supported, such as the application scenario mentioned above that requires two antennas in the same frequency band to work at the same time or in time sharing. Further, one of the two feed ports of feed port 1 and feed port 2 may not be connected to a feed source but connected to a matching load, that is, the two antenna radiators are fed through the feed network in a single manner. In this way, an antenna with a reconfigurable (ie variable) pattern can be formed, and the pattern can be changed by changing the phase shift value of the adjustable phase shifter to form a scanning radiation direction.

Hereinafter, a number of embodiments provided in this application will be described in detail with reference to the accompanying drawings. In the following embodiments, the antenna simulation is based on the following environment: the width of the whole machine is 78 mm, and the length of the whole machine is 158 mm. The metal frame 11 has a thickness of 4 mm and a width of 3 mm, and the antenna clearance in the Z-direction projection area is 1 mm to 2 mm.

Example 1

In this embodiment, the antenna radiator A and the antenna radiator B adopt a B2B dual antenna form with a symmetrical structure.

7A-7C show the dual antenna solution provided by Embodiment 1. Among them, FIG. 7A is a structural diagram of the dual-antenna solution, FIG. 7B shows a design prototype of the dual-antenna solution in the whole machine, and FIG. 7C shows the feed network of the dual-antenna solution. As shown in FIGS. 7A-7C, the antenna provided in Embodiment 1 may include: an antenna radiator 31-A, an antenna radiator 31-B, a feeding point 33-A, a feeding point 33-B, and those shown in FIG. 7C The feeder network shown. in,

A grounding branch 32 is provided at one end of the antenna radiator 31 -A and one end of the antenna radiator 31 -B. These two ends are set opposite each other, which can be called the ground terminal. The grounding branch 32 is connected to the floor. One end of the antenna radiator 31-A and the antenna radiator 31-B may be parallel to the floor. The two grounding stubs 32 can also be combined into one grounding stub. At this time, the ground ends of the antenna radiator 31-A and the antenna radiator 31-B are connected. Optionally, the two grounding terminals can also be located close to each other. Here, the short distance means that the two grounding terminals are not connected, and the distance between the two grounding terminals is less than the first value, for example, 5 mm. That is to say, one end of the antenna radiator 31-A is grounded and the other end is open, one end of the antenna radiator 31-B is grounded, and the other end is open, the ground end of the antenna radiator 31-A and the antenna radiator 31-B The grounding ends are located close to and opposite to each other, and the open end of the antenna radiator 31-A and the open end of the antenna radiator 31-B are located far away and opposite to each other.

As shown in FIG. 7B, the antenna radiator 31 -A and the antenna radiator 31 -B can be implemented by the metal frame 11. The grooves 33-A and 33-B between the metal frame 11 and the floor are formed by hollowing out the floor, and a strip-shaped floor portion extending to the suspended metal frame is formed. The strip-shaped floor portion is the grounding branch 32. In addition, two gaps are opened on the bottom metal frame: a gap 35 and a gap 36. These two gaps connect the groove with the external free space. The suspended metal frame between the slot 35 and the slot 36 is the antenna radiator. The suspended metal frames on both sides of the grounding branch 32 respectively form an antenna radiator 31-A and an antenna radiator 31-B.

The feeding point 33-A may be arranged on the antenna radiator 31-A, and the feeding point 33-B may be arranged on the antenna radiator 31-B. The feeding point 33-A and the feeding point 33-B are connected to the feeding network shown in FIG. 7C. As shown in FIG. 7B, the feeding point 33-A and the feeding point 33-B are connected to the feeding network through the feeding line 34. The feeder wire 34 can be drawn from the transmission line on the PCB, or can be realized by hollowing out the floor.

The feeding network shown in FIG. 7C can be connected to the direct feeding points of the antenna radiator 31-A and the antenna radiator 31-B (e.g., feeding point 33-A, feeding point 33-B). ) And two feed sources. The two feed sources are independent and have a natural high degree of isolation. The feed network shown in FIG. 7C may include: a first-stage matching network 21-A, a first-stage matching network 21-B, a 90° phase shifter, a 3dB bridge 25, a second-stage matching network 27-A, and a second-stage matching network Secondary matching network 27-B. The entire feed network can be implemented on a single-layer PCB.

The first-stage matching network 21-A and the first-stage matching network 21-B can be used to match the input impedance of the antenna radiator 31-A and the antenna radiator 31-B, respectively, which is beneficial to improve isolation. The second-stage matching network 27-A and the second-stage matching network 27-B can be used to match the input impedance of the two feed sources, respectively.

The first-stage matching network 21-A is connected between the antenna radiator A and the 3dB bridge 25, and the first-stage matching network 21-B is connected between the antenna radiator B and the 3dB bridge 25. Specifically, the first-level matching network 21-A may be connected to the feeding point 33-A on the antenna radiator A, and the first-level matching network 21-B may be specifically connected to the feeding point 33-B on the antenna radiator B. The second level matching network 27-A is connected between the 3dB bridge 25 and the feeding port 1, and the second level matching network 27-B is connected between the 3dB bridge 25 and the feeding port 2. Feed port 1 is connected to one feed source, and feed port 2 is connected to another feed source. As shown in Figure 7C, each matching network can use an LC circuit composed of capacitors (C) and inductors (L).

A 90° phase shifter can be connected between the first stage matching network 21-B and the 3dB bridge 25. This 90° phase shifter can be implemented using a 1/4 wavelength microstrip line. There is no need to shift the phase between the first-stage matching network 21-A and the 3dB bridge 25, which means that the phase shifter 23-A in the general design concept described in FIG. 6 can be omitted.

The 3dB electric bridge 25 can be realized by a typical double-stub directional coupler, for example, composed of 4 microstrip lines. As mentioned in the general design concept of Fig. 6, the 3dB bridge 25 has the function of equal power distribution and improved isolation between ports, and equally divides the RF power fed from the feeding port 1 and the feeding port 2 to the feeding point 33. -A. Feeding point 33-B. In addition, the 3dB bridge 25 can divide the signal fed from the feeding port 1 or the feeding port 2 into two signals with a phase difference of 90°. Further, the 90° phase shifter connected between the 3dB bridge 25 and the first-stage matching network 21-B can input the signal to the feeding point 33-B to be phase-shifted by 90° so that the signal is fed to the feeding point 33 There are two phase differences between the signal of -B and the signal fed to the feeding point 33-A: 0° and 180°.

According to the transmission characteristics of the 3dB bridge 25, when the feeding port 1 inputs a radio frequency signal, the signal fed to the feeding point 33-A and the signal fed to the feeding point 33-B have the same amplitude and have a phase of 180° Difference. At this time, the DM line antenna mode can be excited on the two segments of the antenna radiator 31-A and the antenna radiator 31-B. When the feeding port 2 inputs a radio frequency signal, the signal fed to the feeding point 33-A and the signal fed to the feeding point 33-B have the same amplitude and a phase difference of 0°. At this time, the CM line antenna mode can be excited on the two segments of the antenna radiator 31-A and the antenna radiator 31-B.

When the feeding port 1 inputs a radio frequency signal, the signal fed to the feeding point 33-A and the signal fed to the feeding point 33-B have the same amplitude and a phase difference of 180°. At this time, the current distribution on the antenna radiator 31-A and the antenna radiator 31-B can refer to the current distribution shown in FIG. 3B. When the feeding port 2 inputs a radio frequency signal, the signal fed to the feeding point 33-A and the signal fed to the feeding point 33-B have the same amplitude and a phase difference of 0°. At this time, the current distribution on the antenna radiator 31-A and the antenna radiator 31-B can refer to the current distribution shown in FIG. 2B.

The antenna radiation structure provided in Embodiment 1 may be a symmetrical structure. The antenna radiator A and the antenna radiator B may be symmetrical with the grounding stub 32 on the axis of symmetry. The size and shape of the antenna radiator A and the antenna radiator B may be the same. Further, the antenna radiator A and the antenna radiator B may extend on the same straight line. The feeding positions of the antenna radiator 31-A and the antenna radiator 31-B can also be symmetrical, that is, the distance between the feeding point 33-A and the grounding stub 32 (marked as D1) and the feeding point 33-B to the ground The distance between the branches 32 (labeled D2) can be equal.

The size of the dual antenna provided in Embodiment 1 may be as follows: the length of the antenna radiator A and the antenna radiator B is 15 mm. The widths of the

gaps

35 and 36 on the metal frame 11 are both 0.5 mm to 2 mm. The width of the groove 33-A and the groove 33-B formed between the metal frame 11 and the PCB floor is 1 mm to 3 mm. The total length from the feeding point 33-A along the antenna radiator A to the ground end of the ground stub 32 may be less than 1/4 wavelength and greater than 1/8 wavelength. Similarly, the total length from the feeding point 33-B along the antenna radiator B to the ground end of the ground stub 32 may be less than 1/4 wavelength and greater than 1/8 wavelength. The distance from the feeding point 33-A to the open end of the antenna radiator A can be 0 to 1/4 wavelength. Similarly, the distance from the feeding point 33-B to the open end of the antenna radiator B can be 0-1/4 wavelengths.

The simulation of the antenna provided in Embodiment 1 will be described below with reference to the accompanying drawings.

FIG. 8A shows the S parameter curve of the antenna simulation provided in Embodiment 1. FIG. Among them, resonance "1" (2.5GHz) (the value of curve S1,1 at 2.5GHz), resonance "2" (the value of curve S2,2 at 2.5GHz) represents the antenna produced by the embodiment 1 Two resonances. Resonance "1" is generated when the two antenna radiators excite the CM line antenna mode when the feed port 1 is fed. Resonance "2" is caused by the excitation of the DM line antenna mode by the two antenna radiators when the feed port 2 is fed. In addition to the 2.5 GHz frequency band shown in FIG. 8A, the antenna provided in Embodiment 1 can also generate resonance in other frequency bands, which can be set by adjusting the size of the antenna radiator. It can be seen from the transmission coefficient curve that the isolation of the dual antenna solution provided by Embodiment 1 is as high as 55dB (absolute value of -55dB), refer to the value of

curve

1 and 2 at 2.5GHz.

FIG. 8B shows the efficiency curve of the antenna provided in Embodiment 1. FIG. The system efficiency of the antenna provided by Embodiment 1 is relatively high, about -1dB.

8C-8D show the radiation pattern of the antenna provided in Embodiment 1. Wherein, the pattern shown in FIG. 8C is the radiation direction generated by the CM line antenna mode when the two antenna radiators are excited by the feeding port 1 (indicated by "AC1" in FIG. 8C). The radiation pattern shown in FIG. 8D is the radiation direction generated by the DM line antenna pattern excited by the two segments of the antenna radiator when the feed port 2 is fed (indicated by "AC2" in FIG. 8D). The radiation direction of the feeding port 1 when feeding power and the radiation direction of the feeding port 2 when feeding power are significantly complementary.

Fig. 8E shows the ECC curves of the antenna provided in Embodiment 1 when feeding from different feeding ports. It can be seen that the ECC between the two segments of antenna radiators excited by the CM line antenna mode when the feed port 1 is fed and the two segments of antenna radiators excited by the DM line antenna mode when the feed port 2 is fed is very low, lower than 0.1.

For comparison, Fig. 9A shows the simulated S-parameter curve when the feeder network shown in Fig. 7C is not used. S1, 1, S2, and 2 are respectively the S-parameter curve when the feeder port 1 and the feeder port 2 are fed. . Fig. 9B shows a simulated efficiency curve without using the feeding network shown in Fig. 7C. AC1 and AC2 indicate the efficiency curves of the feeding port 1 and the feeding port 2 respectively. Without using the feeder network shown in Figure 7C, the isolation of the dual-antenna scheme is only 5dB (absolute value of -5dB) (refer to the value of curve S1,2 in Figure 9A at 2.5GHz), and the efficiency is only -2.7 dB.

It can be seen from the comparison that using the feed network shown in Figure 7C, the isolation of the dual antennas at the center frequency of 2.5GHz is increased from 5dB to 55dB (absolute value of -55dB), and the antenna efficiency is increased from -2.7dB to -1.0dB. At the same time, the radiation directions are obviously complementary, and the ECC is less than 0.1.

It can be seen that the dual-antenna solution provided in Embodiment 1 introduces a 3dB bridge in the B2B dual-antenna feed network, which can achieve the purpose of dual-antenna decoupling while achieving power distribution and obtain good isolation. There are only two connection points between the feeding network and the antenna radiator, namely the feeding point 33-A and the feeding point 33-B, which reduces the complexity of the electrical connection. Moreover, the feeding network realizes the integration of symmetrical feeding and anti-symmetric feeding. The feeding network can be realized on a planar structure, for example, set on the same layer of PCB, which reduces the structural complexity of the feeding network.

Example 2

In this embodiment, the antenna radiator A and the antenna radiator B also adopt a B2B dual antenna form with a symmetrical structure. In Embodiment 2, on the basis of Embodiment 1, the feeder network is adjusted. In this embodiment, the 90° phase shifter is removed, and the capacitance and inductance values in the second-stage matching network are adjusted to achieve impedance matching. For example, as shown in FIG. 10, only one capacitor may be connected in parallel in the second-stage matching network 27-A and the second-stage matching network 27-B, and the capacitance value is 1p.

Due to the removal of the 90° phase shifter, when the RF signal is input from the feeding port 1, the signal fed to the feeding point 33-A and the signal fed to the feeding point 33-B have the same amplitude and have a 90° Phase difference. At this time, a mixed mode of the CM line antenna mode and the DM line antenna mode can be excited on the two segments of the antenna radiator 31-A and the antenna radiator 31-B. When the feeding port 2 inputs a radio frequency signal, the signal fed to the feeding point 33-A and the signal fed to the feeding point 33-B have the same amplitude and a radio frequency signal with a phase difference of -90°. At this time, a mixed mode of the CM line antenna mode and the DM line antenna mode can be excited on the two segments of the antenna radiator 31-A and the antenna radiator 31-B.

Figures 11A-11G show that under the premise that the phase difference between the signal at the feed point 33-A and the signal at the feed point 33-B is 90°, the antenna radiator A and the antenna radiator B The distribution of the current in a half cycle of the radio frequency signal (the cycle is marked as T). 11A-11G show the current distributions at multiple instants of 0T (that is, the start time of the cycle), T/12, T/4, T/6, T/3, 5T/12, and T/2 in sequence. Among them, at the moments of 0T, T/12, 5T/12, and T/2, the currents on the antenna radiator A and the antenna radiator B are symmetrically and inversely distributed, that is, the CM line antenna mode current. At this time, the embodiment 2 The provided antenna is implemented as a CM wire antenna. At T/4, T/6, and T/3, the currents on the antenna radiator A and the antenna radiator B are distributed in the same direction, that is, the DM line antenna mode current. At this time, the antenna provided by embodiment 2 is realized It is a DM line antenna. It can be seen that in one radio frequency signal cycle, the antenna provided in Embodiment 2 switches between the CM line antenna mode and the DM line antenna mode. This working mode can be referred to as the aforementioned hybrid mode.

The simulation of the antenna provided in Embodiment 2 will be described below with reference to the accompanying drawings.

FIG. 12A shows the S parameter curve of the antenna simulation provided in Embodiment 2. FIG. As shown in FIG. 12A, the center frequency of resonance is 2.5 GHz, and the isolation is about 13 dB (absolute value of -13 dB) (refer to the value of curve S1,2 in FIG. 12A at 2.5 GHz). FIG. 12B shows the efficiency curve of the antenna simulation provided by Embodiment 2. As shown in Fig. 12B, the antenna efficiency is approximately -1.2dB. Figure 12C shows the radiation pattern of the antenna provided in Embodiment 2 when it is fed at the feed port 1 (indicated by "AC1" in the figure), and Figure 12D shows the antenna provided in Embodiment 2 is fed at the feed port 2. Radiation pattern of electricity (indicated by "AC2" in the figure). It can be seen that the radiation direction when the feeding port 1 is feeding and the radiation direction when the feeding port 2 is feeding are significantly complementary.

It can be seen that, compared with Example 1, although the isolation and radiation efficiency are reduced, the pattern of the dual antenna of Example 2 is compared with the pattern of the dual antenna of Example 1. The dual antenna of Example 2 Has stronger lateral radiation. The pattern of the dual antenna of Embodiment 1 shows that the dual antenna of Embodiment 1 has stronger longitudinal radiation. The dual antennas of Embodiment 2 and the dual antennas of Embodiment 1 can cover different usage scenarios.

For example, suppose that the antenna radiator A and the antenna radiator B are realized by the bottom metal frame of the electronic device 10. In a free space scenario, the dual antennas of Embodiment 2 have strong lateral radiation, which can provide strong free space radiation efficiency. In a hand-held scenario, for example, when the user holds the electronic device 10 to make a call, the lateral radiation of the dual antennas of Embodiment 2 will be absorbed by the user's hand, but the longitudinal radiation of the dual antennas of Embodiment 2 is not easily absorbed by the user's hand. Suitable for this kind of hand-held scene.

In addition, FIG. 12E shows the ECC curve of the dual antenna provided in Embodiment 2. As shown in Figure 12E, the ECC is very low, below 0.1.

It can be seen that the dual antenna solution provided in Embodiment 2 can excite a mixed mode of CM line antenna mode and DM line antenna mode, and can provide a radiation direction different from that in Embodiment 1, and that in Embodiment 1 can be formed in the use scenario Complementary. In addition, under the action of the 3dB bridge, the feed port 1 and the feed port 2 in the hybrid mode can still have a high degree of isolation.

Example 3

In this embodiment, the antenna radiator A and the antenna radiator B also adopt a B2B dual antenna form with a symmetrical structure. The difference from Embodiment 1 is that, as shown in Fig. 13, the 90° phase shifter is changed to an adjustable phase shifter, that is, the phase is adjustable. In addition, the second-stage matching network in this embodiment adopts adjustable devices such as adjustable capacitors or adjustable switches to adapt to changes in the parameters of the adjustable phase shifter to achieve impedance matching. For example, as shown in FIG. 13, the capacitors in the second-stage matching network 27-A and the second-stage matching network 27-B are variable capacitors.

If a matching load is added to the feeding port 2, the antenna provided in Embodiment 3 can form a single-port antenna fed by the feeding port 1. That is, the feed port 2 is no longer connected to the feed source, and no radio frequency signal is fed. Similarly, it can also be replaced by adding a matching load at the feeding port 1, and only feeding port 2 is fed.

When the feeding port 1 inputs a radio frequency signal, the phase difference between the signal fed to the feeding point 33-A and the signal fed to the feeding point 33-B is variable, depending on the adjustable phase shifter.

The pattern A to the pattern G in FIG. 14 show the radiation directions under different phase differences. Among them, the pattern A to the pattern G show the radiation directions and directivity coefficients ( dB). It can be seen that by adjusting the adjustable phase shifter, the antenna pattern can be reconstructed, and scanning radiation directions can be realized to cover different angles. In addition, by adjusting the adjustable phase shifter, the directivity coefficient of the antenna can also be controlled.

The antenna provided in Embodiment 3 can be realized as an antenna with a reconfigurable (that is, changeable) pattern, and the directional pattern can be changed by connecting the controller of the adjustable phase shifter to change the phase shift value of the adjustable phase shifter. A scanning radiation direction is formed, and the radiation direction can be flexibly adjusted according to the application scenario to ensure good radiation efficiency in different application scenarios.

The following specifically explains how to support various application scenarios through the adjustable phase shifter.

One way is that under the premise that the antenna radiator A and the antenna radiator B are realized by the metal frame on the top or bottom of the electronic device, the controller can be used to control the movement when it is detected that the user is holding the electronic device horizontally while playing the game. The phaser sets the phase shift value to 0° or 180°. At this time, combined with the 90° phase difference produced by the 3dB bridge, the following two phase differences can be finally made between the signal fed to the feeding point 33-B and the signal fed to the feeding point 33-A: 90 °, 270°. These two phase differences can respectively cause the radiator to generate the radiation directions shown in the pattern C and the pattern G in FIG. 14, that is, the radiation directions radiating to both sides of the electronic device. Referring to FIG. 14, it can be seen that when the user holds the electronic device with both hands on the horizontal screen and plays the game, the antenna radiation in the direction C and the direction G is not easily affected by the bottom and top of the electronic device held by the user, which is an ideal radiation direction.

One way is that under the premise that the antenna radiator A and the antenna radiator B are realized by the bottom metal frame of the electronic device, the controller can be used to detect that the user is holding the bottom of the electronic device in a vertical screen, for example, when the user is holding the bottom of the electronic device in a vertical screen. When holding an electronic device to make a video call, or when a user holds the electronic device in a vertical screen to turn on the speaker to make a call, the phase shifter is controlled to set the phase shift value to 90°. At this time, combined with the 90° phase difference generated by the 3dB bridge, the signal fed to the feeding point 33-B and the signal fed to the feeding point 33-A can finally have the following phase difference: 180°. This phase difference can cause the radiator to generate the radiation direction shown in the pattern E in FIG. 14, that is, the radiation direction radiating toward the top of the electronic device. Referring to FIG. 14, it can be seen that in the scene where the user holds the bottom of the electronic device vertically, the antenna radiation in the direction E is not easily affected by the bottom of the user's hand holding the electronic device, which is a more ideal radiation direction.

One way is that under the premise that the antenna radiator A and the antenna radiator B are realized by the bottom metal frame of the electronic device, the controller can be used to detect that the user is holding the bottom of the electronic device in a vertical screen, for example, when the user is holding the bottom of the electronic device in a vertical screen. When holding the electronic device to make a video call, the user holds the electronic device in the vertical screen to turn on the speaker to make a call, etc., control the phase shifter to set the phase shift value to 270°. At this time, combined with the 90° phase difference generated by the 3dB bridge, the signal fed to the feeding point 33-B and the signal fed to the feeding point 33-A can finally have the following phase difference: 0°. This phase difference can cause the radiator to generate the radiation direction shown in the directional diagram A in FIG. 14, that is, the radiation direction radiating to the bottom of the electronic device. Referring to FIG. 14, it can be seen that in the scene where the user holds the electronic device vertically, the antenna radiation in the direction A is not easily affected by the top of the electronic device held by the user, and is an ideal radiation direction.

One way is that under the premise that the antenna radiator A and the antenna radiator B are realized by the top metal frame of the electronic device, the controller can be used to detect that the user is holding the bottom of the electronic device in a vertical screen, for example, when the user is holding the bottom of the electronic device in a vertical screen. When holding the electronic device to make a video call, the user holds the electronic device in the vertical screen to turn on the speaker to make a call, etc., control the phase shifter to set the phase shift value to 270°. At this time, combined with the 90° phase difference generated by the 3dB bridge, the signal fed to the feeding point 33-B and the signal fed to the feeding point 33-A can finally have the following phase difference: 0°. This phase difference can cause the radiator to generate a radiation direction that radiates to the top of the electronic device. Therefore, in a scenario where the user holds the bottom of the electronic device vertically, the radiation direction is not easily affected by the bottom of the electronic device held by the user, and is a more ideal radiation direction.

One way is that under the premise that the antenna radiator A and the antenna radiator B are realized by the top metal frame of the electronic device, the controller can be used to detect that the user is holding the top of the electronic device in a vertical screen, for example, when the user is holding the top of the electronic device in a vertical screen. When holding an electronic device to make a video call, or when a user holds the electronic device in a vertical screen to turn on the speaker to make a call, the phase shifter is controlled to set the phase shift value to 90°. At this time, combined with the 90° phase difference generated by the 3dB bridge, the signal fed to the feeding point 33-B and the signal fed to the feeding point 33-A can finally have the following phase difference: 180°. This phase difference can cause the radiator to produce a radiation direction that radiates to the bottom of the electronic device. Therefore, in the scene where the user holds the top of the electronic device vertically, the radiation direction is not easily affected by the top of the electronic device held by the user, and is a more ideal radiation direction.

One way is that under the premise that the antenna radiator A and the antenna radiator B are realized by the top or bottom metal frame of the electronic device, the controller can be used to control the shift of the adjustable phase shifter when the electronic device is in a free space scene. The phase range is: 0°～360°, that is, the directional pattern can be unlimited.

Of course, the antenna radiator A and the antenna radiator B can also be realized by the side metal frame of the electronic device. At this time, in the scene where the user is holding the side of the electronic device, the phase shift value of the adjustable phase shifter can be adjusted to form the radiation directions shown in the directional diagrams A and E in FIG. 14; In the top or bottom scene, the phase shift value of the adjustable phase shifter can be adjusted to form the radiation directions shown in the radiation patterns C and G in FIG. 14.

The antenna provided in Embodiment 3 can also be connected to the feed sources at the feed port 1 and the feed port 2 respectively to form a dual feed port antenna, and the pattern can also be reconstructed.

Example 4

In this embodiment, the antenna radiator A and the antenna radiator B adopt a symmetrical structure of F2F dual antenna form.

15A-15B show the dual antenna solution provided by Embodiment 4. Among them, FIG. 15A is a structural diagram of the dual-antenna solution, and FIG. 15B shows a design prototype of the dual-antenna solution in the whole machine. As shown in FIGS. 15A-15B, the antenna provided in Embodiment 4 may include: an antenna radiator 41-A, an antenna radiator 41-B, a feeding point 43-A, a feeding point 43-B, and a feeding network . in,

The open ends of the antenna radiator 41 -A and the antenna radiator 41 -B are arranged close to each other, and a gap 49 may be provided between the open ends of the antenna radiator 41 -A and the antenna radiator 41 -B. The other end of the antenna radiator 41-A is grounded, and can be connected to the floor through the ground stub 45-A. Similarly, the other end of the antenna radiator 41-B is also grounded, and can be connected to the floor through the ground stub 45-B. The antenna radiator 41-A, the antenna radiator 41-B, the grounding stub 45-A, the grounding stub 45-B, and the floor may be enclosed to form a groove 45. Here, the short distance means that the two open ends are not connected, a gap is provided between them, and the gap width is smaller than the first value, for example, 5 mm. In other words, one end of the antenna radiator 41-A is grounded and the other end is open, one end of the antenna radiator 41-B is grounded, and the other end is open. The open end of the antenna radiator 41-A and the antenna radiator 41-B are The open ends are located close to and opposite to each other. There is a gap (may be called the first gap) between the open end of the antenna radiator 41-A and the open end of the antenna radiator 41-B, and the ground end of the antenna radiator 41-A It is located far away from and opposite to the ground terminal of the antenna radiator 41-B.

As shown in FIG. 15B, the antenna radiator 41 -A and the antenna radiator 41 -B can be realized by the metal frame 11. A slot 45 between the metal frame 11 and the floor is formed by hollowing out the floor, and both ends of the slot 45 are closed, so that the floor can extend to the metal frame 11 to achieve grounding. A gap 49 (ie, a first gap) may be provided on the metal frame 11, and the gap 49 may communicate with the groove 45 and the external free space. The slit 49 may be located at an intermediate position on one side of the groove 45. A section of the metal frame between the slot 49 and one closed end of the slot 45 constitutes the antenna radiator 41-A, and a section of the metal frame between the slot 49 and the other closed end of the slot 45 constitutes the antenna radiator 41-B.

The feeding point 43-A may be arranged on the antenna radiator 41-A, and the feeding point 43-B may be arranged on the antenna radiator 41-B. The feeding point 43-A and the feeding point 43-B are connected to the feeding network. As shown in FIG. 15B, the feeding point 43-A and the feeding point 43-B are connected to the feeding network through the feeding line 46. The feeder line 46 can be drawn from the transmission line on the PCB, or can be realized by hollowing out the floor.

The feeder network in Embodiment 4 may use the feeder network in the aforementioned Embodiments 1 to 3.

For example, if the feed network shown in FIG. 7C is used, in the dual antenna scheme of Embodiment 4, the CM and DM slots can be excited on the two radiators of the antenna radiator 41-A and the antenna radiator 41-B. Antenna mode. At this time, the dual antenna provided in Embodiment 4 has good isolation and is easy to implement in engineering.

For example, if the feed network shown in Fig. 10 is used, in the dual-antenna scheme of Embodiment 4, the two radiators of the antenna radiator 41-A and the antenna radiator 41-B can be used to excite CM and DM. Groove mixed mode. At this time, the dual antenna provided in Embodiment 4 can provide a radiation direction different from that of the antenna shown in FIGS. 15A to 15B, and can be complementary to the antenna shown in FIGS. 15A to 15B in usage scenarios.

For example, if the feeding network shown in FIG. 13 is used, and a matching load is connected to one of the feeding ports and no feeding is provided, the antenna of embodiment 4 can constitute a single-port feeding antenna with a reconfigurable pattern.

Regarding the specific forms of various feeder networks, please refer to the relevant content in the previous embodiments, which will not be repeated here.

In combination with the above embodiments, it is not limited to a symmetrical antenna radiating structure, and the lengths of the antenna radiator A and the antenna radiator B may also be unequal, as shown in FIGS. 16A-16B. In this case, the phase shifter in the feed network can be used for compensation to improve the isolation between CM and DM.

In combination with the above embodiments, the structure is not limited to the symmetrical feeding position. The feeding positions of the antenna radiator A and the antenna radiator B may also be asymmetric, that is, D1 and D2 are not equal, as shown in FIGS. 17A-17B. In this case, the phase shifter in the feed network can be used for compensation to improve the isolation between CM and DM.

In combination with the above embodiments, the antenna radiator may also be another form of radiator, such as a planar inverted F antenna (PIFA), so as to form multiple forms of dual antennas. For example, as shown in FIGS. 18A-18D, the antenna radiator A and the antenna radiator B may be two conductive planes, such as metal plates. Figures 18A-18D show in turn a B2B PIFA dual antenna form (the conductive plane is not connected), another B2B PIFA dual antenna form (conductive plane connection), and a face to back (F2B) PIFA dual antenna form , F2F PIFA dual antenna form. Here, the F2B PIFA dual antenna form means that the open side (the side opposite to the ground side) of one conductive plane and the ground side of the other conductive plane are located close to each other, but do not touch. Here, the short distance means that the open side and the ground side are not connected, and the distance between the two is less than a first value, for example, 5 mm.

The antenna radiator A and the antenna radiator B provided in the above embodiments are not limited to being arranged on the bottom of the electronic device 10, and may also be arranged on the top or side of the electronic device 10. At the same time, such an antenna radiator is provided on the bottom, top and sides of the electronic device 10, which can realize a MIMO antenna, save space, and realize simple engineering.

The antenna design solutions provided by the above embodiments are not limited to be implemented in electronic devices with a metal frame ID. The metal frame is just a name. Other conductive structures surrounding the PCB 17, such as a metal middle frame, can also be used as the metal mentioned in the above embodiments. frame.

In this application, the wavelength in a certain wavelength mode of the antenna (such as the half-wavelength mode, the quarter-wavelength mode, etc.) may refer to the wavelength of the signal radiated by the antenna. For example, the half-wavelength mode of the antenna can generate resonance in the 2.4 GHz band, where the wavelength in the half-wavelength mode refers to the wavelength of the antenna radiating signals in the 2.4 GHz band. It should be understood that the wavelength of the radiation signal in the air can be calculated as follows: wavelength=speed of light/frequency, where the frequency is the frequency of the radiation signal. The wavelength of the radiation signal in the medium can be calculated as follows:

Among them, ε is the relative permittivity of the medium, and frequency is the frequency of the radiation signal.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

An electronic device, characterized by comprising a first antenna radiator, a second antenna radiator, a first feeding point, a second feeding point, and a feeding network; wherein,

The first feeding point is located on the first antenna radiator, and the second feeding point is located on the second antenna radiator;

The feed network includes: a 3dB bridge, a first phase shifter and a second phase shifter, the input port of the 3db bridge is connected to the first feed port, and the isolation port of the 3dB bridge is connected to the second feed Electrical port, the 0° output port of the 3dB bridge is connected to the first feed point through the first phase shifter, and the 90° output port of the 3dB bridge is connected to the first feed point through the second phase shifter The second feed point.
The electronic device of claim 1, wherein the phase shift value of the first phase shifter is greater than 0° and less than 360°, and the phase shift value of the second phase shifter is greater than 0° and less than 360° °.
3. The electronic device according to claim 2, wherein the phase shift value of the first phase shifter and the phase shift value of the second phase shifter differ by 90°.
3. The electronic device of claim 2, wherein the phase shift value of the first phase shifter and the phase shift value of the second phase shifter are the same.
The electronic device of claim 1, wherein the first phase shifter and the second phase shifter are phase adjustable phase shifters, and the first phase shifter and the second phase shifter are The phase shift range of the phaser is: 0° to 360°.
5. The electronic device according to any one of claims 1-5, wherein the first feed port is connected to a first feed source, and the second feed port is connected to a second feed source.
5. The electronic device according to any one of claims 1 to 5, wherein the first feed port is connected to a first feed source, and the second feed port is connected to a matching load.
An electronic device, characterized by comprising a first antenna radiator, a second antenna radiator, a first feeding point, a second feeding point, and a feeding network; wherein,

The first feeding point is located on the first antenna radiator, and the second feeding point is located on the second antenna radiator;

The feed network includes: a 3dB bridge and a phase shifter, the input port of the 3db bridge is connected to a first feed port, the first feed port is connected to a first feed source, and the 3dB bridge is isolated The port is connected to the second feeding port, the second feeding port is connected to a matching load, the 0° output port of the 3dB bridge is connected to the first feeding point through the phase shifter, and the phase shifter is For a phase adjustable phase shifter, the 90° output port of the 3dB bridge is connected to the second feeding point.
The electronic device according to claim 8, wherein the first antenna radiator and the second antenna radiator are realized by a bottom or top metal frame of the electronic device; the electronic device further comprises a connection point The controller of the phase shifter is configured to control the phase shifter to set the phase shift value to 0° or 180° when it is detected that the user is holding the electronic device horizontally to play a game.
The electronic device according to claim 8 or 9, wherein the first antenna radiator and the second antenna radiator are realized by a bottom metal frame of the electronic device; the electronic device further includes a connection point The controller of the phase shifter is used for controlling the phase shifter to set the phase shift value to 90° when the user holds the bottom of the electronic device in a vertical screen.
The electronic device according to any one of claims 8-10, wherein the first antenna radiator and the second antenna radiator are realized by a bottom metal frame of the electronic device; the electronic device It also includes a controller connected to the phase shifter, and the controller is used to control the phase shifter to set the phase shift value to 270° when the user holds the top of the electronic device in a vertical screen.
The electronic device according to any one of claims 8-11, wherein the first antenna radiator and the second antenna radiator are realized by a top metal frame of the electronic device; the electronic device It also includes a controller connected to the phase shifter, and the controller is configured to control the phase shifter to set the phase shift value to 270° when the user holds the bottom of the electronic device in a vertical screen.
The electronic device according to any one of claims 8-12, wherein the first antenna radiator and the second antenna radiator are realized by a top metal frame of the electronic device; the electronic device It also includes a controller connected to the phase shifter, and the controller is used to control the phase shifter to set the phase shift value to 90° when the user holds the top of the electronic device in a vertical screen.
The electronic device according to any one of claims 8-13, wherein the first antenna radiator and the second antenna radiator are realized by a bottom or top metal frame of the electronic device; The electronic device further includes a controller connected to the phase shifter, and the controller is used for controlling the phase shift range of the phase shifter to be 0° to 360° when the electronic device is in a free space scene.
The electronic device according to any one of claims 1-14, wherein one end of the first antenna radiator is grounded and the other end is open, and one end of the second antenna radiator is grounded and the other end is open. The ground end of the first antenna radiator and the ground end of the second antenna radiator are located close to and opposite to each other, and the open end of the first antenna radiator and the open end of the second antenna radiator are far away from, Relatively set.
The electronic device according to claim 15, wherein the first ground stub connected to the ground end of the first antenna radiator and the second ground stub connected to the ground end of the second antenna radiator are combined into one Grounding stub, the ground terminal of the first antenna radiator is connected to the ground terminal of the second antenna radiator, or the first antenna radiator and the second antenna radiator are combined into one integrated radiation The first antenna radiator and the second antenna radiator are respectively two parts of the integrated radiator.
The electronic device according to claim 16, wherein the electronic device comprises a metal frame and a floor, wherein,

The first antenna radiator and the second antenna radiator are respectively two segments of the metal frame, and the two segments are formed by opening a slot on the metal frame;

The first grounding stub and the second grounding stub are formed by hollowing out the floor, and are specifically a strip-shaped floor portion formed by hollowing out the floor and extending to the suspended metal frame.
The electronic device according to claim 16 or 17, wherein the metal frame is provided with two gaps, and the suspended metal frame between the two gaps forms the integrated radiator.
The electronic device according to any one of claims 1-14, wherein one end of the first antenna radiator is grounded and the other end is open, and one end of the second antenna radiator is grounded and the other end is open. The open end of the first antenna radiator and the open end of the second antenna radiator are located close to and opposite to each other, and between the open end of the first antenna radiator and the open end of the second antenna radiator There is a first slot, and the ground terminal of the first antenna radiator and the ground terminal of the second antenna radiator are located far away and opposite to each other.
The electronic device according to claim 19, wherein the first antenna radiator, the second antenna radiator, the first ground stub connected to the ground terminal of the first antenna radiator, and the The second ground stub connected to the ground ends of the two antenna radiators and the floor of the electronic device enclose a groove.
The electronic device of claim 20, wherein the electronic device comprises a metal frame and a floor, wherein,

The groove is a groove between the metal frame and the floor, and is formed by hollowing out the floor, the two ends of the groove are closed, and the floor extends to the metal frame on both sides of the groove, respectively, Forming the first grounding stub and the second grounding stub;

The first slot is opened on the metal frame and communicates with the groove and an external free space, and a section of the metal frame between the first slot and a closed end of the slot constitutes the first antenna radiator, A section of metal frame between the first slot and the other closed end of the groove constitutes the second antenna radiator.
The electronic device according to claim 20 or 21, wherein the first gap is located at an intermediate position on one side of the groove.
The electronic device according to any one of claims 1-22, wherein the feeding network further comprises: a first matching network and a second matching network, and the first matching network is connected to the first matching network. Between the feeding point and the first phase shifter, the second matching network is connected between the second feeding point and the second phase shifter.
The electronic device according to any one of claims 1-23, wherein the feeding network further comprises: a third matching network and a fourth matching network, the third matching network is connected to the 3dB power supply Between the input port of the bridge and the first feed port, the fourth matching network is connected between the isolation port of the 3dB electric bridge and the second feed port.