CN112736411A

CN112736411A - Antenna structure and wireless communication device with same

Info

Publication number: CN112736411A
Application number: CN201911030484.3A
Authority: CN
Inventors: 何兆伟
Original assignee: Futaihua Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Futaihua Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2021-04-30
Also published as: TW202118147A; TWI831867B

Abstract

An antenna structure is applied to a wireless communication device and comprises at least one antenna unit, wherein the at least one antenna unit is arranged independently, each antenna unit comprises a first antenna, a second antenna and a switching unit, the first antenna is a WIFI2.4G/5G antenna, the second antenna is a 5G antenna, the first antenna is connected to different positions of the second antenna through the switching unit, and then different ground access paths are formed so as to switch different frequency bands of the second antenna. A wireless communication device having the antenna structure is also provided.

Description

Antenna structure and wireless communication device with same

Technical Field

The present invention relates to an antenna structure suitable for use in multiple bands and a wireless communication device having the same.

Background

With the development of modern communication technology, mobile devices become an indispensable part of people's lives, and communication systems have increasingly high requirements on communication efficiency. The fifth generation mobile communication technology 5G can achieve the communication requirement of faster speed and larger network capacity, and in order to achieve this requirement, a Multiple-Input Multiple-Output (MIMO) architecture is a common design. However, an architecture that accommodates multiple antennas suitable for 2G, 3G, 4G antennas, 5G MIMO, and the like simultaneously in a limited space of a mobile device is a significant issue for antenna design and mobile device configuration design.

Disclosure of Invention

In view of the foregoing, it is desirable to provide an antenna structure suitable for multiple bands and a wireless communication device having the same.

An antenna structure is applied to a wireless communication device and comprises at least one antenna unit, wherein the at least one antenna unit is arranged independently, each antenna unit comprises a first antenna, a second antenna and a switching unit, the first antenna is a WIFI2.4G/5G antenna, the second antenna is a 5G antenna, the first antenna is connected to different positions of the second antenna through the switching unit, and then different ground access paths are formed so as to switch different frequency bands of the second antenna.

A wireless communication device includes the antenna structure.

The antenna structure is provided with at least one antenna unit, and the structure of each antenna unit is the same, so that the at least one antenna unit can form a MIMO framework. Each antenna unit comprises a corresponding first antenna and a corresponding second antenna, and the switching unit is arranged, so that the first antenna is combined with the switching unit to switch a lower ground path, a 5G antenna formed by the second antennas can realize a frequency band switching function, and meanwhile, the antenna design space is saved. In addition, because the antenna units are independently arranged, the 5G antennas (namely, the second antennas) in the antenna units are mutually independent in a 5G frequency band, wireless signals can be simultaneously transmitted and received, the uploading and downloading speed of 5G is realized, and the communication efficiency is improved.

Drawings

Fig. 1 is a diagram illustrating an antenna structure applied to a wireless communication device according to a preferred embodiment of the invention.

Fig. 2 is a schematic diagram of a partial structure of an antenna unit in the antenna structure shown in fig. 1.

Fig. 3 is a Voltage Standing Wave Ratio (VSWR) graph of the first antenna and the second antenna shown in fig. 2.

Description of the main elements

Antenna structure 100

Antenna units

11, 12, 13, 14

First antenna 111

Feed segment 1111

First radiating arm 1112

Second radiation arm 1113

Third radiating arm 1114

First radiating section 1115

Second radiating section 1116

Grounding segment 1117

Second antenna 113

Slot 1131

Switching unit 115

Third antenna 117

Wireless communication device 200

Ground plane 201

Signal feed-in point 203

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "electrically connected" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "electrically connected" to another element, it can be connected by contact, e.g., by wires, or by contactless connection, e.g., by contactless coupling.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, an embodiment of the invention provides an antenna structure 100 applied to a wireless communication device 200. The wireless communication device 200 can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a Personal Digital Assistant (PDA), and the like. The wireless communication apparatus 200 transmits and receives wireless signals in multiple bands through the antenna structure 100 to realize wireless communication.

The antenna structure 100 comprises at least one antenna element, for example four antenna elements 11-14. In this embodiment, the antenna structure 100 may be disposed on a ground plane 201 (e.g., a middle frame of the wireless communication device 200) to be grounded through the ground plane 201. In addition, the antenna structure 100 is electrically connected to a circuit board (not shown) for feeding power signals from the circuit board.

It is understood that the antenna structure 100 may be disposed on other carriers, and may be fed and grounded in other manners. For example, the antenna structure 100 may be directly disposed on the circuit board, and the feeding and grounding may be performed through the circuit board, or the grounding may be performed through a metal casing of the wireless communication device 200.

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

In the present embodiment, the four antenna units 11-14 have the same shape and structure, and the structure of one of the antenna units, for example, the antenna unit 11, is taken as an example for explanation.

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.

Referring to fig. 2, the first antenna 111 is a WIFI2.4G/5G antenna for transceiving signals of WIFI2.4G and WIFI 5G. In the present embodiment, the first antenna 111 includes a feeding segment 1111, a first radiating arm 1112, a second radiating arm 1113, a third radiating arm 1114, a first radiating segment 1115, a second radiating segment 1116, and a ground segment 1117.

The feeding section 1111 is a straight strip, and one end of the feeding section 1111 is electrically connected to the signal feeding point 203 of the circuit board to feed a current signal to the first antenna 111. The first radiating arm 1112 is substantially in the shape of a straight bar, and one end of the first radiating arm is perpendicularly connected to one end of the feeding section 1111, so as to form a substantially L-shaped structure with the feeding section 1111. The second radiating arm 1113 is substantially straight. One end of the first radiating arm 1112 is perpendicularly connected to an end of the first radiating arm 1112 far away from the feeding segment 1111, and the other end extends in a direction parallel to the feeding segment 1111. The third radiating arm 1114 is substantially straight, and has one end perpendicularly connected to an end of the second radiating arm 1113 away from the first radiating arm 1112, and the other end extending in a direction parallel to the first radiating arm 1112 and close to the feeding segment 1111.

In the present embodiment, the length of the feeding segment 1111 is greater than that of the second radiating arm 1113, and the length of the third radiating arm 1114 is smaller than that of the first radiating arm 1112. The feeding segment 1111 and the second radiating arm 1113 are disposed 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 disposed on the same side of the second radiating arm 1113, and form a substantially U-shaped structure with the second radiating arm 1113.

In the present embodiment, the first radiating section 1115 is substantially a straight strip, disposed at the connection point of 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 and extend in opposite directions, and together form a substantially T-shaped structure with the feeding section 1111.

The second radiating section 1116 is substantially a straight strip, one end of which is perpendicularly connected to the end of the first radiating section 1115 far from the feeding section 1111, and the other end of which extends in a direction parallel to the feeding section 1111, so as to form a substantially L-shaped structure with the first radiating section 1115.

In this embodiment, the length of the first radiating segment 1115 is less than the length of the first radiating arm 1112. The length of the second radiating section 1116 is less than the length of the second radiating arm 1113. The overall length of the first 1112, second 1113 and third 1114 radiating arms is greater than the overall length of the first 1115 and second 1116 radiating segments.

In this embodiment, the grounding segment 1117 has a substantially straight strip shape. One end of the ground segment 1117 is perpendicularly connected to a side of the feed segment 1111 near the second radiating arm 1113 and extends in a direction parallel to the first radiating arm 1112 and near the third radiating arm 1114.

It is understood that when a current is fed from the signal feeding point 203, the current flows through the feeding segment 1111, the first radiating arm 1112, the second radiating arm 1113 and the third radiating arm 1114 in sequence, so as to excite a first mode to generate a radiation signal of the first frequency band. Meanwhile, the current will also flow through the feeding segment 1111, the first radiation segment 1115 and the second radiation segment 1116 in sequence, so as to excite a second mode to generate a radiation signal of a second frequency band. In this embodiment, the first modality is a WIFI2.4G modality, and the second modality is a WIFI 5G modality. The first frequency band is a WIFI2.4G frequency band. The second frequency band is a WIFI 5G frequency band. That is, the feed segment 1111, the first radiation arm 1112, the second radiation arm 1113, and the third radiation arm 1114 together constitute a WIFI2.4G antenna. The feed segment 1111, the first radiating segment 1115 and the second radiating segment 1116 constitute a WIFI 5G antenna.

It is understood that in other embodiments, the shape and structure of the first antenna 111 are not limited to the above, and may take on many different structures according to the design requirements of the wireless communication device 200.

The second antenna 113 is a 5G antenna and is configured to receive and transmit wireless signals in a 5G frequency band. In the present embodiment, the second antenna 113 has a substantially rectangular sheet shape. The second antenna 113 may be a metal plate or other structure on the middle frame of the wireless communication device 200. One side of the second antenna 113 is provided with a slot 1131. The slot 1131 is substantially elongated and extends horizontally from one side of the second antenna 113 along a direction parallel to the first radiating arm 1112, so that the second antenna 113 forms a slot antenna.

It is understood that, in the present embodiment, the switching unit 115 includes a connection terminal 1151, a first switching terminal 1153, a second switching terminal 1155 and a third switching terminal 1157. The connection terminal 1151 is connected to the ground segment 1117 of the first antenna 111. The first, second and third switching ends 1153, 1155 and 1157 are respectively connected to different positions of the slot 1131, such as a first position G1, a second position G2 and a third position G3. The first position G1, the second position G2 and the third position G3 are sequentially arranged at intervals and are arranged along the direction gradually far away from the opening end of the slot 1131.

In this embodiment, the connection terminals 1151 are switched to different switching terminals (e.g., the first switching terminal 1153, the second switching terminal 1155, and the third switching terminal 1157), so that the first antenna 111 is connected to different ground positions, so as to form different lower 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 the frequency band. For example, when the connection end 1151 is switched to the first switch end 1153, the first antenna 111 is connected to the first position G1 of the second antenna 113 through the first switch end 1153, so that the slot antenna formed by the second antenna 113 is switched to the first coupled 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 a 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 a third coupling frequency band.

In this embodiment, the frequency of the first coupled band is 5G band 3300 and 3800 MHz. The frequency of the second coupled band is 3800-4400MHz of the 5G band. The frequency of the third coupled frequency band is 4400-5000MHz of the 5G frequency band. That is to say, the second antenna 113 can operate in the operating band 3300-.

It is to be understood that referring to fig. 3, fig. 3 is a Voltage Standing Wave Ratio (VSWR) graph of the antenna structure 100 operating in WIFI2.4G mode, WIFI 5G mode and 5G mode. The curve S31 is the VSWR value of the antenna structure 100 operating in the WIFI2.4G mode. Curve S32 is the VSWR value of the antenna structure 100 operating in the WIFI 5G mode. The curve S33 is the VSWR value when the antenna structure 100 operates in the 5G band 3300 and 3800MHz when the connection end 1151 is switched to the first switching end 1153 in the antenna structure 100. The curve S34 is the VSWR value when the antenna structure 100 operates in the 5G band 3800 and 4400MHz when the connection end 1151 is switched to the second switching end 1155 in the antenna structure 100. The curve S35 is the VSWR value when the antenna structure 100 operates in the 5G band 4400-.

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 simultaneously operate in the WIFI2.4G, WIFI 5G and 5G frequency bands, the entire operating bandwidth of the antenna structure 100 is effectively increased, and the wireless communication device 200 can have both the WIFI2.4G/5G function and the 5G communication function without additionally increasing the antenna design space.

It can be understood that, referring to fig. 1 again, in the present embodiment, the third antenna 117 is a 2G/3G/4G antenna, and is used for transceiving wireless signals in 2G, 3G, and 4G bands. In this embodiment, the 2G/3G/4G antenna may have a variety of different structures according to the design requirements of the wireless communication device 200. For example, the third antenna 117 may be disposed on a metal frame of the wireless communication device 200 and operate in a low-frequency mode, a medium-frequency mode, and a high-frequency mode. Wherein, the frequency of the low-frequency mode is 699-960 MHz. The frequency of the intermediate frequency mode is 1710-2170 MHz. The frequency of the high-frequency mode is 2300-2690 MHz.

Obviously, the antenna structure 100 of the present invention provides 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 form a MIMO architecture. Each antenna unit comprises a corresponding first antenna 111 and a corresponding second antenna 113, and the switching unit 115 is arranged, so that the first antenna 111 is combined with the switching unit 115 to switch a ground path, and thus, a 5G antenna formed by the second antennas 113 can realize a frequency band switching function, and meanwhile, the antenna design space is saved. In addition, because the antenna units 11-14 are independently arranged, the 5G antennas (i.e., the second antenna 113) in the antenna units can be independent of each other in the 5G frequency band, and can simultaneously receive and transmit wireless signals, and the uploading and downloading speed of 5G is realized, thereby improving the communication efficiency. Furthermore, each antenna unit is further provided with a third antenna 117, so that the third antenna 117 can transmit and receive 2G, 3G, 4G, 5G and WIFI2.4G/5G wireless signals together with the first antenna 111 and the second antenna 113, and has a wide application range.

In view of the above, although the preferred embodiments of the present invention have been disclosed for illustrative purposes, the present invention is not limited to the above-described embodiments, and those skilled in the relevant art can make various modifications and applications without departing from the scope of the basic technical idea of the present invention.

Claims

1. An antenna structure applied in a wireless communication device, comprising: the antenna structure comprises at least one antenna unit, wherein the at least one antenna unit is arranged independently, each antenna unit comprises a first antenna, a second antenna and a switching unit, the first antenna is an WIFI2.4G/5G antenna, the second antenna is a 5G antenna, the first antenna is connected to different positions of the second antenna through the switching unit, and then different lower ground paths are formed so as to switch different frequency bands of the second antenna.

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

3. The antenna structure of claim 1, characterized in that: the second antenna is strip-shaped, a slot is formed in the second antenna, the slot extends horizontally from one side of the second antenna to the opposite side, and therefore the second antenna forms a slot antenna to receive and transmit wireless signals of a 5G frequency band.

4. The antenna structure of claim 3, characterized in that: the switching unit comprises a connecting end, a first switching end, a second switching end and a third switching end, the connecting end is connected with the first antenna, 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, and the connecting end is respectively switched to different switching ends and then connected to different grounding positions to form different ground paths to the slot.

5. The antenna structure of claim 4, characterized in that: the first position, the second position and the third position are arranged at intervals in sequence and are arranged along the direction gradually far away from the open end of the slot, when the connecting end is switched to the first switching end, the second antenna is switched to a first coupling frequency band, when the connecting end is switched to the second switching end, the second antenna is switched to a second coupling frequency band, and when the connecting end is switched to the third switching end, the second antenna is switched to a third coupling frequency band.

6. The antenna structure of claim 5, characterized in that: the frequency of the first coupling frequency band is 3300-.

7. The antenna structure of claim 4, characterized in that: the first antenna comprises a feed-in section, a first radiation arm, a second radiation arm, a third radiation arm and a grounding section, wherein the feed-in section is in a straight strip shape, one end of the feed-in section is electrically connected to a signal feed-in point, the first radiation arm is in a straight strip shape, one end of the first radiation arm is vertically connected to one end of the feed-in section so as to form an L-shaped structure with the feed-in section, the second radiation arm is in a straight strip shape, one end of the second radiation arm is vertically connected to one end of the first radiation arm far away from the feed-in section, the other end of the second radiation arm extends in a direction parallel to the feed-in section, the third radiation arm is in a straight strip shape, one end of the grounding section is vertically connected to one side of the feed-in section close to the second radiation arm, and extends in a direction parallel to the first radiating arm and close to the third radiating arm, the connection terminal being electrically connected to the ground segment.

8. The antenna structure of claim 7, characterized in that: the first antenna also comprises a first radiation section and a second radiation section, wherein the first radiation section is in a straight strip shape, is arranged at the joint of the feed-in section and the first radiation arm and extends along the direction far away from the first radiation arm, the second radiation section is in a straight strip shape, one end of the second radiation section is vertically connected to the end part of the first radiation section far away from the feed-in section, and the other end of the second radiation section extends along the direction parallel to the feed-in section so as to form an L-shaped structure with the first radiation section.

9. The antenna structure of claim 8, characterized in that: when current is fed in from the signal feed-in point, the current sequentially flows through the feed-in section, the first radiation arm, the second radiation arm and the third radiation arm, so that a WIFI2.4G mode is excited to generate a radiation signal of a WIFI2.4G frequency band, and simultaneously the current also sequentially flows through the feed-in section, the first radiation section and the second radiation section, so that a WIFI 5G mode is excited to generate a radiation signal of a WIFI 5G frequency band.

10. The antenna structure of claim 1, characterized in that: each antenna unit further comprises a third antenna, wherein the third antenna is a 2G/3G/4G antenna and is used for receiving and transmitting wireless signals of 2G, 3G and 4G frequency bands.

11. A wireless communication apparatus, characterized in that: the wireless communication device comprising an antenna arrangement according to any of claims 1-10.

12. The wireless communications apparatus of claim 11, wherein: the wireless communication device comprises a ground plane and a circuit board, wherein the antenna structure is arranged on the ground plane, the circuit board provides a feed-in power supply for the antenna structure, or the antenna structure is arranged on the circuit board, and the circuit board provides the feed-in power supply and grounding for the antenna structure.