Antenna structure and wireless communication device including the antenna structure

Abstract

An antenna structure includes a first antenna, a second antenna and a ferrite bead module, wherein the first antenna and the second antenna are connected via the ferrite bead module, and when the antenna structure operates in a first frequency band, the first antenna and the second antenna are disconnected, and the second antenna independently transmits and receives wireless signals; when the antenna structure operates in a second frequency band, the first antenna and the second antenna are connected, and transmit and receive wireless signals together, and the first frequency band is higher than the second frequency band. A wireless communication device including the antenna structure is also provided.

Description

Technical Field

[0001] The invention relates to an antenna structure applicable to multiple frequency bands and a wireless communication device comprising 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 including the antenna structure.

[0004] An antenna structure is applied to a wireless communication device. The antenna structure comprises a first antenna, a second antenna and a ferrite bead module. The first antenna is connected to the second antenna via the ferrite bead module. When the antenna structure operates in a first frequency band, the first antenna is disconnected from the second antenna, and the second antenna independently transmits and receives wireless signals. When the antenna structure operates in a second frequency band, the first antenna is connected to the second antenna, and they transmit and receive wireless signals together. The first frequency band is higher than the second frequency band.

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

[0006] The antenna structure connects the multiple 5G antennas of the second antenna and the first antenna in series through the multiple ferrite beads, and through the impedance characteristics of the multiple ferrite beads in different frequency bands, the multiple 5G antennas are independent of each other in the 5G frequency band, and transmit and receive wireless signals at the same time, thereby improving communication efficiency; and the multiple 5G antennas are connected to the first antenna in the 2G, 3G, and 4G frequency bands to jointly transmit and receive wireless signals, saving the design space of 2G, 3G, and 4G antennas. Therefore, the antenna structure is compatible with transmitting and receiving 2G, 3G, 4G, and 5G wireless signals, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0008] Figure 2FIG. 4 is a graph showing the impedance characteristics of the ferrite bead of the antenna structure according to a preferred embodiment of the present invention.

[0009] Figure 3 for Figure 1 A schematic diagram of another state of the antenna structure shown.

[0010] Main component symbols

[0011] Antenna structure 100

[0012] The first antenna 12

[0013] The second antenna 14

[0014] 5G Antenna 141-148

[0015] Ferrite Bead Module 16

[0016] Ferrite beads 161-168

[0017] Processor 18

[0018] Wireless communication device 200

[0019] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0020] See also Figure 1 The first 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.

[0021] The antenna structure 100 includes a first antenna 12, a second antenna 14, a ferrite bead module 16 and a processor 18. In this embodiment, the antenna structure 100 can be disposed on a circuit board (not shown), and the circuit board provides necessary power supply and grounding for the antenna structure 100. It can be understood that the antenna structure 100 can also be disposed on other carriers, such as the housing of the wireless communication device 200, and fed and grounded by other means, such as grounding through a metal housing.

[0022] The first antenna 12 is a 2G / 3G / 4G antenna, which is used to send and receive wireless signals in 2G, 3G, and 4G frequency bands. In this embodiment, the 2G / 3G / 4G antenna can have a variety of different structures according to the design requirements of the wireless communication device 200.

[0023] The second antenna 14 is a 5G antenna array, including multiple 5G antennas connected in series, and the multiple 5G antennas are used to send and receive wireless signals in the 5G frequency band. In this embodiment, the structure and arrangement of the multiple 5G antennas can be presented in various ways according to the design requirements of the wireless communication device 200. In this embodiment, the 5G antenna array includes 8 5G antennas 141-148.

[0024] The ferrite bead module 16 may be a chip ferrite bead (Chip Ferrite Beads), including a plurality of ferrite beads (Ferrite Beads), which are used to connect the plurality of 5G antennas one by one and connect the first antenna 12 and the second antenna 14. In this embodiment, the ferrite bead module 16 includes 8 ferrite beads 161-168, one ferrite bead 162-168 is connected between every two 5G antennas 141-148, and one ferrite bead 161 is connected between the 5G antenna 141 and the first antenna 12. Thus, the first antenna 12 and the plurality of 5G antennas 141-148 are connected in series through the plurality of ferrite beads 161-168. Please refer to Figure 2 In this embodiment, the plurality of ferrite beads 161-168 are passive components having high impedance characteristics in a frequency band above 3000 MHz and low impedance characteristics in a frequency band below 2690 MHz.

[0025] The processor 18 is electrically connected to multiple 5G antennas 141-148 of the first antenna 12 and the second antenna 14 through multiple signal lines, and is used to provide the first antenna 12 and the second antenna 14 with feeding current and necessary matching, so that the first antenna 12 and the second antenna 14 can operate in multiple frequency bands.

[0026] It can be understood that the multiple 5G antennas 141-148 of the first antenna 12 and the second antenna 14 all have a grounding terminal, for example, grounded through a circuit board or a shell of the wireless communication device 200.

[0027] When the processor 18 feeds current to the multiple 5G antennas 141-148 of the first antenna 12 and the second antenna 14 respectively, the current flows along the multiple 5G antennas 141-148 of the first antenna 12 and the second antenna 14 to excite a first mode and a second mode to generate radiation signals of the first frequency band and the second frequency band. In this embodiment, the first mode includes the 5G mode, and the first frequency band includes the 5G frequency band 5000-6000MHz; the second mode includes a low frequency mode, an intermediate frequency mode and a high frequency mode, and the second frequency band includes a low frequency band 699-960MHz, an intermediate frequency band 1710-2170MHz and a high frequency band 2300-2690MHz, that is, the radiation signal of the second frequency band includes the 2G, 3G, and 4G frequency bands.

[0028] When the antenna structure 100 operates in the first frequency band, that is, in a frequency band above 3000MHz, the multiple ferrite beads 161-168 have high impedance characteristics, and a short circuit is formed between the multiple 5G antennas 141-148 and between the multiple 5G antennas 141-148 and the first antenna 12. Each of the 5G antennas 141-148 is independent of each other and forms an independent 5G MIMO antenna, and simultaneously transmits and receives wireless signals, thereby making the speed of transmitting and receiving wireless signals at least 8 times higher. When the antenna structure 100 operates in the second frequency band, that is, in a frequency band below 3000MHz, the multiple ferrite beads 161-168 have low impedance characteristics, and a short circuit is formed between the multiple 5G antennas 141-148 and between the multiple 5G antennas 141-148 and the first antenna 12. The multiple 5G antennas 141-148 are connected to the first antenna 12 in sequence (see Figure 3 ) to jointly transmit and receive wireless signals, thereby effectively increasing the path length of the first antenna 12 and significantly reducing the design space of 2G, 3G, and 4G antennas.

[0029] The antenna structure 100 of the present invention connects the multiple 5G antennas 141-148 of the second antenna 14 and the first antenna 12 in series through the multiple ferrite beads 161-168, and through the impedance characteristics of the multiple ferrite beads 161-168 in different frequency bands, the multiple 5G antennas 141-148 are independent of each other in the 5G frequency band, and transmit and receive wireless signals at the same time, thereby improving communication efficiency; and the multiple 5G antennas 141-148 are connected to each other with the first antenna 12 in the 2G, 3G, and 4G frequency bands to jointly transmit and receive wireless signals, saving the design space of 2G, 3G, and 4G antennas. Therefore, the antenna structure 100 is compatible with transmitting and receiving 2G, 3G, 4G, and 5G wireless signals, and has a wide range of applications.

[0030] 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 a first antenna, a second antenna and a ferrite bead module, the first antenna and the second antenna are connected through the ferrite bead module, when the antenna structure operates in a first frequency band, the first antenna is disconnected from the second antenna, and the second antenna independently transmits and receives wireless signals; when the antenna structure operates in a second frequency band, the first antenna is connected to the second antenna, and they jointly transmit and receive wireless signals, the first frequency band is higher than the second frequency band, wherein the second antenna is a 5G antenna array, including multiple 5G antennas connected in series in sequence, and the multiple 5G antennas are used to transmit and receive wireless signals in the 5G frequency band.

2. The antenna structure according to claim 1, characterized in that: The first antenna is a 2G / 3G / 4G antenna, which is used to send and receive wireless signals in the 2G, 3G, and 4G frequency bands.

3. The antenna structure according to claim 1, wherein: The ferrite bead module includes a plurality of ferrite beads, the number of the plurality of ferrite beads is equal to the number of the plurality of 5G antennas, and the plurality of ferrite beads are respectively connected to the plurality of 5G antennas and the first antenna one by one.

4. The antenna structure according to claim 3, characterized in that: The second antenna includes 8 5G antennas, the ferrite bead module includes 8 ferrite beads, one ferrite bead is connected between every two 5G antennas, and one ferrite bead is connected between the 5G antenna and the first antenna.

5. The antenna structure according to claim 3, characterized in that: The antenna structure also includes a processor, which is electrically connected to the multiple 5G antennas of the first antenna and the second antenna through multiple signal lines, and the processor provides current feeding and matching for the multiple 5G antennas of the first antenna and the second antenna.

6. The antenna structure according to claim 5, characterized in that: The first frequency band is a frequency band above 3000 MHz, and the second frequency band is a frequency band below 3000 MHz.

7. The antenna structure according to claim 6, characterized in that: The multiple ferrite beads have high impedance in the first frequency band, forming an open circuit between the multiple 5G antennas and between the multiple 5G antennas and the first antenna, and each of the 5G antennas is independent of each other and forms an independent 5G MIMO antenna to simultaneously transmit and receive wireless signals; the multiple ferrite beads have low impedance in the second frequency band, forming a short circuit between the multiple 5G antennas and between the multiple 5G antennas and the first antenna, and the multiple 5G antennas are connected to the first antenna in sequence to jointly transmit and receive wireless signals.

8. A wireless communication device, characterized in that: The wireless communication device comprises the antenna structure according to any one of claims 1-7.

9. The wireless communication device according to claim 8, wherein: The wireless communication device includes a circuit board, and the circuit board provides a feeding power supply and a ground for the antenna structure.

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