Antenna structure and wireless communication device having the same

Abstract

An antenna structure is applied to a wireless communication device, comprising at least one antenna unit, wherein the at least one antenna unit is independently arranged, each antenna unit comprises a first antenna, a second antenna and a switching unit, wherein the first antenna is a WIFI 2.4G / 5G antenna, the second antenna is a 5G antenna, and the first antenna is connected to different positions of the second antenna through the switching unit, thereby forming different ground paths to switch different frequency bands of the second antenna. A wireless communication device having the antenna structure is also provided.

Description

Technical Field

[0001] The invention relates to an antenna structure suitable for multiple frequency bands and a wireless communication device having the antenna structure. Background Art

[0002] With the development of modern communication technology, mobile devices have become an indispensable part of people's lives, and communication systems have higher and higher requirements for communication efficiency. The fifth generation of mobile communication technology 5G can meet the communication needs of faster speed and larger network capacity. In order to achieve this demand, the use of multi-antenna design MIMO (Multiple-Input Multiple-Output) architecture is a common design. However, it is a major issue for antenna design and mobile device structure design to simultaneously place multiple antenna architectures such as 2G, 3G, 4G antennas and 5G MIMO in the limited space of the mobile device. Summary of the invention

[0003] In view of this, it is necessary to provide an antenna structure applicable to multiple frequency bands and a wireless communication device having the antenna structure.

[0004] An antenna structure is applied to a wireless communication device, comprising at least one antenna unit, wherein the at least one antenna unit is independently arranged, each antenna unit comprises a first antenna, a second antenna and a switching unit, the first antenna is a WIFI 2.4G / 5G antenna, the second antenna is a 5G antenna, and the first antenna is connected to different positions of the second antenna through the switching unit, thereby forming different ground paths to switch different frequency bands of the second antenna.

[0005] A wireless communication device comprises the antenna structure.

[0006] The antenna structure is configured by setting at least one antenna unit, and each antenna unit has the same structure, so that the at least one antenna unit can form a MIMO architecture. Each antenna unit includes a corresponding first antenna and a second antenna, and then the switching unit is configured so that the first antenna combines with the switching unit to switch the ground path, so that the 5G antenna formed by the second antenna can realize the frequency band switching function, while saving antenna design space. In addition, since the antenna units are independently configured, the 5G antennas (i.e., the second antennas) therein can be independent of each other in the 5G frequency band, can send and receive wireless signals at the same time, and achieve 5G upload and download speeds, thereby improving communication efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of an antenna structure according to a preferred embodiment of the present invention applied to a wireless communication device.

[0008] Figure 2 for Figure 1 A schematic diagram of the partial structure of the antenna unit in the antenna structure shown.

[0009] Figure 3 for Figure 2 The voltage standing wave ratio (VSWR) curve of the first antenna and the second antenna is shown.

[0010] Main component symbols

[0011] Antenna structure 100

[0012] Antenna units 11, 12, 13, 14

[0013] The first antenna 111

[0014] Feeding section 1111

[0015] The first radiation arm 1112

[0016] The second radiation arm 1113

[0017] The third radiation arm 1114

[0018] The first radiation section 1115

[0019] The second radiation section 1116

[0020] Grounding Section 1117

[0021] Second antenna 113

[0022] Slot 1131

[0023] Switching unit 115

[0024] The third antenna 117

[0025] Wireless communication device 200

[0026] Ground plane 201

[0027] Signal feed point 203

[0028] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that when an element is referred to as being "electrically connected" to another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "electrically connected" to another element, it may be a contact connection, for example, a wire connection, or a contactless connection, for example, a contactless coupling.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0033] See also Figure 1 The embodiment of the present invention provides an antenna structure 100, which is applied to a wireless communication device 200. The wireless communication device 200 may be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a personal digital assistant (PDA), etc. The wireless communication device 200 transmits and receives multi-band wireless signals through the antenna structure 100 to achieve wireless communication.

[0034] The antenna structure 100 includes at least one antenna unit, for example, four antenna units 11 to 14. In this embodiment, the antenna structure 100 can be disposed on a ground plane 201 (for example, a middle frame of the wireless communication device 200) to be grounded through the ground plane 201. In addition, the antenna structure 100 is also electrically connected to a circuit board (not shown) to feed a power signal from the circuit board.

[0035] It is understandable that the antenna structure 100 may also be disposed on other carriers, and fed and grounded in other ways. For example, the antenna structure 100 may be directly disposed on the circuit board, and fed and grounded through the circuit board, or grounded through the metal housing of the wireless communication device 200.

[0036] In this embodiment, four antenna units 11-14 are respectively arranged at the four corners of the wireless communication device 200, and form a 4*4 MIMO (Multiple-Input Multiple-Output) architecture. For example, the antenna unit 11 is arranged at the upper left corner of the wireless communication device 200. The antenna unit 12 is arranged at the upper right corner of the wireless communication device 200. The antenna unit 13 is arranged at the lower left corner of the wireless communication device 200. The antenna unit 14 is arranged at the lower right corner of the wireless communication device 200.

[0037] In this embodiment, the four antenna units 11 - 14 have the same shape and structure. Here, one of the antenna units, such as the antenna unit 11 , is taken as an example to illustrate its structure.

[0038] In this embodiment, the antenna unit 11 includes a first antenna 111 , a second antenna 113 , a switching unit 115 and a third antenna 117 .

[0039] See also Figure 2 The first antenna 111 is a WIFI 2.4G / 5G antenna for transmitting and receiving WIFI 2.4G and WIFI 5G signals. In this embodiment, the first antenna 111 includes a feeding section 1111, a first radiating arm 1112, a second radiating arm 1113, a third radiating arm 1114, a first radiating section 1115, a second radiating section 1116 and a grounding section 1117.

[0040] The feeding section 1111 is in the shape of a straight strip, one end of which is electrically connected to the signal feeding point 203 of the circuit board to feed the current signal to the first antenna 111. The first radiating arm 1112 is roughly in the shape of a straight strip, one end of which is vertically connected to one end of the feeding section 1111 to form a roughly L-shaped structure with the feeding section 1111. The second radiating arm 1113 is roughly in the shape of a straight strip. One end of it is vertically connected to one end of the first radiating arm 1112 away from the feeding section 1111, and the other end extends in a direction parallel to the feeding section 1111. The third radiating arm 1114 is roughly in the shape of a straight strip, one end of which is vertically connected to one end of the second radiating arm 1113 away from the first radiating arm 1112, and the other end extends in a direction parallel to the first radiating arm 1112 and close to the feeding section 1111.

[0041] In this embodiment, the length of the feeding section 1111 is greater than the length of the second radiating arm 1113, and the length of the third radiating arm 1114 is less than the length of the first radiating arm 1112. The feeding section 1111 and the second radiating arm 1113 are arranged on the same side of the first radiating arm 1112, and form a substantially U-shaped structure with the first radiating arm 1112. The third radiating arm 1114 and the first radiating arm 1112 are arranged on the same side of the second radiating arm 1113, and form a substantially U-shaped structure with the second radiating arm 1113.

[0042] In this embodiment, the first radiating section 1115 is substantially in the shape of a straight strip, is disposed at the connection between the feeding section 1111 and the first radiating arm 1112, and extends in a direction away from the first radiating arm 1112. That is, the first radiating section 1115 and the first radiating arm 1112 are disposed at the same end of the feeding section 1111, extend in opposite directions, and together with the feeding section 1111 form a substantially T-shaped structure.

[0043] The second radiating segment 1116 is roughly in the shape of a straight strip, one end of which is vertically connected to the end of the first radiating segment 1115 away from the feeding segment 1111, and the other end extends in a direction parallel to the feeding segment 1111 to form a roughly L-shaped structure with the first radiating segment 1115.

[0044] In this embodiment, the length of the first radiation section 1115 is less than the length of the first radiation arm 1112. The length of the second radiation section 1116 is less than the length of the second radiation arm 1113. The overall length of the first radiation arm 1112, the second radiation arm 1113 and the third radiation arm 1114 is greater than the overall length of the first radiation section 1115 and the second radiation section 1116.

[0045] In this embodiment, the grounding segment 1117 is substantially in a straight strip shape. One end of the grounding segment 1117 is vertically connected to a side of the feeding segment 1111 close to the second radiation arm 1113 , and extends in a direction parallel to the first radiation arm 1112 and close to the third radiation arm 1114 .

[0046] It can be understood that when the current is fed from the signal feeding point 203, the current will flow through the feeding section 1111, the first radiating arm 1112, the second radiating arm 1113 and the third radiating arm 1114 in sequence, thereby exciting a first mode to generate a radiation signal of the first frequency band. At the same time, the current will also flow through the feeding section 1111, the first radiating section 1115 and the second radiating section 1116 in sequence, thereby exciting a second mode to generate a radiation signal of the second frequency band. In this embodiment, the first mode is the WIFI 2.4G mode, and the second mode is the WIFI 5G mode. The first frequency band is the WIFI 2.4G frequency band. The second frequency band is the WIFI 5G frequency band. That is, the feeding section 1111, the first radiating arm 1112, the second radiating arm 1113 and the third radiating arm 1114 together constitute a WIFI 2.4G antenna. The feeding section 1111, the first radiating section 1115 and the second radiating section 1116 constitute a WIFI 5G antenna.

[0047] It can be understood that in other embodiments, the shape and structure of the first antenna 111 are not limited to those described above, and it can present a variety of different structures according to the design requirements of the wireless communication device 200.

[0048] The second antenna 113 is a 5G antenna for transmitting and receiving wireless signals in the 5G frequency band. In this embodiment, the second antenna 113 is roughly in the shape of a rectangular sheet. The second antenna 113 can be a metal sheet or other structure on the middle frame of the wireless communication device 200. A slot 1131 is provided on one side of the second antenna 113. The slot 1131 is roughly in the shape of a long strip, which extends horizontally from one side of the second antenna 113 in a direction parallel to the first radiating arm 1112, so that the second antenna 113 constitutes a slot antenna.

[0049] It can be understood that in this embodiment, the switching unit 115 includes a connecting end 1151, a first switching end 1153, a second switching end 1155 and a third switching end 1157. The connecting end 1151 is connected to the grounding section 1117 of the first antenna 111. The first switching end 1153, the second switching end 1155 and the third switching end 1157 are respectively connected to different positions of the slot 1131, such as the first position G1, the second position G2 and the third position G3. The first position G1, the second position G2 and the third position G3 are arranged in sequence and are arranged in a direction gradually away from the opening end of the slot 1131.

[0050] In this embodiment, the connection end 1151 is switched to different switching ends (e.g., the first switching end 1153, the second switching end 1155, and the third switching end 1157), so that the first antenna 111 is connected to different grounding positions to form different grounding paths to the slot 1131. That is, the second antenna 113 can be connected to the first antenna 111 through different positions, thereby achieving the effect of switching frequency bands. For example, when the connection end 1151 is switched to the first switching end 1153, the first antenna 111 is connected to the first position G1 of the second antenna 113 through the first switching end 1153, so that the slot antenna formed by the second antenna 113 is switched to the first coupling frequency band. When the connection end 1151 is switched to the second switching end 1155, the first antenna 111 is connected to the second position G2 of the second antenna 113 through the second switching end 1155, so that the slot antenna formed by the second antenna 113 is switched to the second coupling frequency band. When the connection end 1151 is switched to the third switching end 1157, the first antenna 111 is connected to the third position G3 of the second antenna 113 through the third switching end 1157, so that the slot antenna formed by the second antenna 113 is switched to the third coupling frequency band.

[0051] In this embodiment, the frequency of the first coupling frequency band is 5G frequency band 3300-3800MHz. The frequency of the second coupling frequency band is 5G frequency band 3800-4400MHz. The frequency of the third coupling frequency band is 5G frequency band 4400-5000MHz. That is, the second antenna 113 can operate in the working frequency band 3300-5000MHz defined by 5G FRI, and by switching the connection end 1151 to different switching ends, the switching of the 5G frequency band can be achieved.

[0052] Understandable, please refer to Figure 3 , Figure 3It is a voltage standing wave ratio (VSWR) curve diagram when the antenna structure 100 works in WIFI2.4G mode, WIFI 5G mode and 5G mode. Among them, curve S31 is the VSWR value when the antenna structure 100 works in WIFI 2.4G mode. Curve S32 is the VSWR value when the antenna structure 100 works in WIFI 5G mode. Curve S33 is the VSWR value when the connection end 1151 in the antenna structure 100 is switched to the first switching end 1153, and the antenna structure 100 works in the 5G frequency band 3300-3800MHz. Curve S34 is the VSWR value when the connection end 1151 in the antenna structure 100 is switched to the second switching end 1155, and the antenna structure 100 works in the 5G frequency band 3800-4400MHz. Curve S35 is the VSWR value of the antenna structure 100 when the connection end 1151 in the antenna structure 100 is switched to the third switching end 1157 and the antenna structure 100 operates in the 5G frequency band of 4400-5000 MHz.

[0053] Obviously, the first antenna 111 and the second antenna 113 in the antenna structure 100 can be integrated together through the switching unit 115, so that the antenna structure 100 can work in WIFI 2.4G, WIFI 5G and 5G frequency bands at the same time, which effectively increases the entire working bandwidth of the antenna structure 100, and the wireless communication device 200 can have both WIFI 2.4G / 5G functions and 5G communication functions without increasing the antenna design space.

[0054] Understandable, please refer to Figure 1 In this embodiment, the third antenna 117 is a 2G / 3G / 4G antenna for transmitting and receiving wireless signals in the 2G, 3G, and 4G frequency bands. In this embodiment, the 2G / 3G / 4G antenna can present a variety of different structures according to the design requirements of the wireless communication device 200. For example, the third antenna 117 can be arranged on the metal frame of the wireless communication device 200 and operate in corresponding low-frequency mode, medium-frequency mode, and high-frequency mode. Among them, the frequency of the low-frequency mode is 699-960MHz. The frequency of the medium-frequency mode is 1710-2170MHz. The frequency of the high-frequency mode is 2300-2690MHz.

[0055] Obviously, the antenna structure 100 of the present invention is provided with a plurality of antenna units 11-14, and the structure of each antenna unit is the same, so that the plurality of antenna units 11-14 can constitute a MIMO architecture. Each antenna unit includes a corresponding first antenna 111 and a second antenna 113, and then the switching unit 115 is provided so that the first antenna 111 switches the ground path in combination with the switching unit 115, so that the 5G antenna formed by the second antenna 113 can realize the frequency band switching function, while saving antenna design space. In addition, since the antenna units 11-14 are independently provided, the 5G antennas therein (i.e., the second antenna 113) can be independent of each other in the 5G frequency band, can simultaneously transmit and receive wireless signals, and achieve 5G upload and download speeds, thereby improving communication efficiency. Furthermore, each antenna unit is also provided with a third antenna 117, so that the third antenna 117 can jointly receive and transmit 2G, 3G, 4G, 5G and WIFI2.4G / 5G wireless signals with the first antenna 111 and the second antenna 113, and has a wide range of applications.

[0056] In summary, although the preferred embodiments of the present invention have been disclosed for illustrative purposes, the present invention is not limited to the embodiments described above, and technicians in related industries may make various modifications and applications thereof without departing from the scope of the basic technical concept of the present invention.

Claims

1. An antenna structure, applied to a wireless communication device, characterized in that: The antenna structure includes at least one antenna unit, which is independently arranged from each other, and each antenna unit includes a first antenna, a second antenna and a switching unit. The first antenna is a WIFI 2.4G / 5G antenna, and the second antenna is a 5G antenna. The first antenna is connected to different positions of the second antenna through the switching unit, thereby forming different ground paths to switch different frequency bands of the second antenna. A slot is provided on the second antenna, and the slot extends horizontally from one side of the second antenna to the other side opposite to the second antenna, so that the second antenna constitutes a slot antenna to receive and transmit wireless signals in the 5G frequency band. The switching unit includes a connecting end, a first switching end, a second switching end and a third switching end. The connecting end is connected to the first antenna, and the first switching end, the second switching end and the third switching end are respectively connected to the first position, the second position and the third position of the slot. By switching the connecting end to different switching ends respectively, the connecting end is connected to different ground positions to form different ground paths to the slot.

2. The antenna structure according to claim 1, characterized in that: The antenna structure includes four antenna units, and the four antenna units are arranged at four corners of the wireless communication device to jointly form a MIMO (Multiple-Input Multiple-Output) architecture.

3. The antenna structure according to claim 1, wherein: The first position, the second position, and the third position are arranged in sequence and in a direction gradually away from the opening end of the slot. When the connection end is switched to the first switching end, the second antenna is switched to the first coupling frequency band. When the connection end is switched to the second switching end, the second antenna is switched to the second coupling frequency band. When the connection end is switched to the third switching end, the second antenna is switched to the third coupling frequency band.

4. The antenna structure according to claim 3, characterized in that: The frequency of the first coupling frequency band is 5G frequency band 3300-3800 MHz, the frequency of the second coupling frequency band is 5G frequency band 3800-4400 MHz, and the frequency of the third coupling frequency band is 5G frequency band 4400-5000 MHz.

5. The antenna structure according to claim 1, wherein: The first antenna includes a feeding section, a first radiating arm, a second radiating arm, a third radiating arm and a grounding section. The feeding section is in a straight strip shape, one end of which is electrically connected to a signal feeding point. The first radiating arm is in a straight strip shape, one end of which is vertically connected to one end of the feeding section to form an L-shaped structure with the feeding section. The second radiating arm is in a straight strip shape, one end of which is vertically connected to one end of the first radiating arm away from the feeding section, and the other end extends in a direction parallel to the feeding section. The third radiating arm is in a straight strip shape, one end of which is vertically connected to one end of the second radiating arm away from the first radiating arm, and the other end extends in a direction parallel to the first radiating arm and close to the feeding section. The grounding section is in a straight strip shape, one end of which is vertically connected to a side of the feeding section close to the second radiating arm, and extends in a direction parallel to the first radiating arm and close to the third radiating arm, and the connecting end is electrically connected to the grounding section.

6. The antenna structure according to claim 5, characterized in that: The first antenna also includes a first radiating segment and a second radiating segment. The first radiating segment is in the shape of a straight strip, which is arranged at the connection between the feeding segment and the first radiating arm and extends in a direction away from the first radiating arm. The second radiating segment is in the shape of a straight strip, one end of which is vertically connected to the end of the first radiating segment away from the feeding segment, and the other end extends in a direction parallel to the feeding segment to form an L-shaped structure with the first radiating segment.

7. The antenna structure according to claim 6, characterized in that: When the current is fed from the signal feeding point, the current flows through the feeding section, the first radiation arm, the second radiation arm and the third radiation arm in sequence, thereby exciting the WIFI 2.4G mode to generate a radiation signal in the WIFI 2.4G frequency band. At the same time, the current also flows through the feeding section, the first radiation section and the second radiation section in sequence, thereby exciting the WIFI 5G mode to generate a radiation signal in the WIFI 5G frequency band.

8. The antenna structure according to claim 1, characterized in that: Each antenna unit also includes a third antenna, which is a 2G / 3G / 4G antenna for sending and receiving wireless signals in the 2G, 3G, and 4G frequency bands.

9. A wireless communication device, characterized in that: The wireless communication device comprises the antenna structure according to any one of claims 1-8.

10. The wireless communication device according to claim 9, wherein: The wireless communication device includes a ground plane and a circuit board, the antenna structure is arranged on the ground plane, the circuit board provides a feeding power supply for the antenna structure, or the antenna structure is arranged on the circuit board, the circuit board provides a feeding power supply and grounding for the antenna structure.

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