TWI699041B - Antenna structure and portable device thereof - Google Patents

Abstract

An antenna structure includes a base board，a first type antenna, a second type antenna and a switch model. The base plate includes a bottom plate, a first side plate and a second side plate. The first type antenna sets in a corner of the base board. The first type antenna is used for receives a first frequency. The second type antenna sets in the first side plate and a second side plate. The second type antenna is used for receives a second frequency and a third frequency. The switch model sets in the base board. The switch model is used for switch to drive the first antenna or drive the second antenna.

Description

Antenna structure and mobile device

The present invention provides an antenna structure, especially a multi-band antenna structure.

Nowadays, mobile devices require more and more data transmission and faster speeds. In addition to the basic multi-frequency bands, only SISO point-to-point transmission can no longer meet the requirements, and the MIMO antenna design can meet the above requirements at the same time. , Through MIMO, different signals can be processed at the same time for transmission and reception, effectively using the time to the extreme. In addition, multi-antenna reception is like the division of labor among multiple people, increasing the stability of reception.

However, the user's hand-holding habits often interfere with the transmission and reception of the antenna. In addition, the thin and beautiful shape is one of the factors that modern people consider when choosing mobile devices. Therefore, how to design a miniaturized antenna with multiple frequency bands and multiple outputs in a limited space is one of the issues of great concern.

In view of this, the present invention proposes an antenna structure that includes a substrate, including a bottom plate, a first side plate, and a second side plate; a first type antenna, arranged on the side corner area of the substrate, for transmitting and receiving the first frequency band; a second type antenna, They are respectively arranged on the first side plate and the second side plate for transmitting and receiving a second frequency band and a third frequency band; and a switch module, arranged on the substrate, for switching to drive the first type antenna or drive the second type antenna .

The first type antenna includes: a first antenna arranged on the bottom plate and connected to the first side plate; and a second antenna arranged on the bottom plate and connected to the second side plate.

Based on this, the isolation between the first antenna and the second antenna is greater than 10dB.

The first antenna further includes a first antenna and a second antenna, and the first antenna and the second antenna have a first angle.

In addition, the second antenna further includes a third segment antenna and a fourth segment antenna, and the third segment antenna and the fourth segment antenna form a second angle.

Furthermore, the first section antenna is connected to the first side plate, the third section antenna is connected to the second side plate, and the extending directions of the first section antenna and the third section antenna are approximately orthogonal.

Based on this, the extension directions of the second antenna and the fourth antenna do not intersect each other.

In addition, the second type antenna further includes a third antenna and a fourth antenna. The third antenna is used for transceiving the second frequency band, and the fourth antenna is used for transceiving the third frequency band.

Wherein, when the second type antennas are adjacent to each other, the third antenna and the fourth antenna are arranged alternately.

The present invention further provides a mobile device comprising: a main body; and the above-mentioned antenna structure is disposed in the main body, wherein the first type antenna is located at the corner of the main body, and the second type antenna is located on one side of the main body.

The detailed features and advantages of the present invention will be described in detail in the following embodiments, and the content is sufficient to enable anyone familiar with the relevant art to understand the technical content of the present invention and implement it accordingly, and according to the content disclosed in this specification, the scope of patent application and the drawings Anyone who is familiar with relevant skills can easily understand the purpose and advantages of the present invention.

Please refer to FIG. 1 and FIG. 2. FIG. 1 is a schematic diagram of the antenna structure of the present invention. Fig. 2 is a schematic diagram of the first type antenna of the present invention. The antenna structure of the present invention includes a substrate 10, a first type antenna 20, a second type antenna 30 and a switching module 40.

The substrate 10 is a rectangular plate structure, including a bottom plate 11 and a first side plate 12 and a second side plate 13. The first side plate 12 and the second side plate 13 are connected to each other to form a box, and the first side plate 12 and The second side plate 13 is approximately perpendicular to the bottom plate 11 so that the overall appearance of the substrate 10 is generally box-shaped. Here, the substrate 10 is preferably an FR4 glass fiber substrate. In addition, the first type antenna 20 and the second type antenna 30 are printed on the substrate 10.

The first type antenna 20 is disposed on the side corner area 14 of the substrate 10. According to the present invention, the side corner area 14 is the four corners of the substrate 10. The first type antenna 20 is used to transmit and receive the first frequency band. Here, the first frequency band may preferably be the Sub-6GHz frequency band, but the present invention is not limited to this. According to the present invention, the first type antenna 20 is preferably arranged at the four corners of the substrate 10 and is designed to be an 8×8 MIMO antenna. Furthermore, two antennas used in the Sub-6GHz frequency band are placed in each corner. Designing the antenna in this position can not only prevent the user's hand-holding habits from affecting the antenna transmission, but also can make good use of its 90 in the corner design. Degree right angle, make the antenna orthogonal, reduce mutual interference during radiation.

Based on this, the first type antenna 20 includes a first antenna 21 which is disposed on the bottom plate 11 and connected to the first side plate 12. The second antenna 22 is disposed on the bottom plate 11 and connected to the second side plate 13. In order not to occupy too much space on the substrate 10, the antenna is arranged at the frame. Based on this, under this design, the isolation between the first antenna 21 and the second antenna 22 is greater than 10 dB.

In addition, the first antenna 21 further includes a first antenna 21a and a second antenna 21b, and a first angle θ _{1 is formed} between the first antenna 21a and the second antenna 21b. The second antenna 22 further includes a third antenna 22a and a fourth antenna 22b, and a second angle θ _{2 is formed} between the third antenna 22a and the fourth antenna 22b. Here, the first angle θ ₁ and the second angle θ _{2 are} preferably obtuse angles, but the present invention is not limited to this, in order to achieve one degree of isolation between the first antenna 21 and the second antenna 22 (Isolation) In the case of greater than 10dB, the size of the first angle θ ₁ and the second angle θ ₂ can be adjusted according to requirements.

Furthermore, in terms of the present invention, the substrate 10 is a rectangular plate structure. Therefore, when the first antenna 21a is connected to the first side plate 12, and the third antenna 22a is connected to the second side plate 13 At this time, the extension directions of the first antenna 21a and the third antenna 22a will be orthogonal to each other, thereby reducing mutual interference during radiation.

Meanwhile, the antenna extending direction of the second section 22b of the antenna 21b and the fourth paragraph, suffering from a first angle θ ₁ θ ₂ of the size of the impact angle and the second angle, so that it will not intersect the extending direction. Furthermore, the overall view between the second segment antenna 21b and the fourth segment antenna 22b is roughly gradual. However, the present invention is not limited to this, and also in order to achieve the extension of the second antenna 21b and the fourth antenna 22b when one of the distances between the first antenna 21 and the second antenna 22 is greater than 10dB. The direction system may be parallel or intersecting.

Please refer to FIG. 3, which is a schematic diagram of the second type antenna of the present invention. The second type antenna 30 is respectively arranged on the first side plate 12 and the second side plate 13 for transmitting and receiving a second frequency band (B4G) and a third frequency band (5G). The second type of antenna is designed as a 12×12 MIMO antenna. Furthermore, according to the present invention, eight antennas are placed symmetrically on the first side plate 12, and the remaining four antennas are placed on the second side plate 13. The design of the second antenna 30 covering the B4G and 5G frequency bands further includes a third antenna 31 and a fourth antenna 32. The third antenna 31 (Monopole Antenna) is preferably used to satisfy the B4G frequency band. The fourth antenna 32 (Slit Antenna) is preferably used to satisfy the 5G frequency band. Here, when the second-type antennas 30 are adjacent to each other, for example, the two sets of second-type antennas 30 on the first side plate 13 will be presented in such a way that the third antennas 31 and the fourth antennas 32 are arranged alternately. Reduce the mutual influence of 5G antennas and increase isolation.

Please refer to FIG. 1 again, the switching module 40 is disposed on the substrate 10, which may preferably be a chip or other control unit for receiving signals and switching to drive the first type antenna 20 or the second type antenna 30 . For example, when the frequency band signal received by the first type antenna 20 is not good, the switching module 40 can manually or automatically switch the first type antenna 20 in use to the second type antenna 30 for receiving the first type antenna 20. Second frequency band or third frequency band. Furthermore, when the frequency band signal received by the second type antenna 30 is not good, the switching module 40 can also manually or automatically switch the second type antenna 30 in use to the first type antenna 20. Receive the first frequency band.

Please refer to FIG. 4, which is a schematic diagram of the mobile device of the present invention. The present invention further provides a mobile device including a main body 100 and an antenna structure 200. The mobile device of the present invention is preferably a mobile phone or a tablet computer. The main body 100 is preferably made of metal and has a rectangular structure. According to the present invention, the main body 100 includes an upper casing 101 and a lower casing 102. The antenna structure 200 is disposed on the lower housing 102. Based on this, the shape of the substrate 10 of the antenna structure 200 preferably corresponds to the shape of the main body 100, so that when the antenna structure 200 is disposed on the lower housing 102, the first type antenna 20 is located at the corner of the main body 100 and the second type antenna 30 is located The side of the body 100.

The antenna structure design of the present invention has the advantages of small size, thin profile, low manufacturing cost and high antenna integration, and is therefore suitable for installation and application in various tablet computers or mobile devices. It is by designing the antenna at the corner of the device without affecting the hardware equipment inside the tablet. And considering that the user’s hand grip will affect the antenna reception, the present invention uses the second type antenna to effectively improve this problem. As long as the transmission of the first type antenna is affected, the switching module can be switched to uninterrupted and transmitted. The best second type antenna greatly increases the upload and download rate and reception stability, and solves the problem of insufficient antenna installation space and poor reception of conventional mobile devices.

Although the technical content of the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. Anyone who is familiar with this technique and makes some changes and modifications without departing from the spirit of the present invention should be covered by the present invention Therefore, the scope of protection of the present invention shall be subject to the scope of the attached patent application.

10: substrate

11: bottom plate

12: The first side panel

13: second side panel

14: Side corner area

20: The first type antenna

21: The first antenna

21a: The first antenna

21b: second antenna

22: second antenna

22a: third antenna

22b: The fourth section of the antenna

30: The second type antenna

31: third antenna

32: Fourth antenna

40: Switch module

100: body

101: Upper shell

102: lower shell

200: antenna structure

θ ₁ : the first angle

θ ₂ : second angle

[Figure 1] is a schematic diagram of the antenna structure of the present invention. [Figure 2] is a schematic diagram of the first type antenna of the present invention. [Figure 3] is a schematic diagram of the second antenna of the present invention. [Figure 4] is a schematic diagram of the mobile device of the present invention.

10: substrate

11: bottom plate

12: The first side panel

13: second side panel

14: Side corner area

20: The first type antenna

30: The second type antenna

40: Switch module

Claims (7)

An antenna structure includes: a substrate, including a bottom plate, a first side plate, and a second side plate; a first-type antenna disposed on a side corner area of the substrate for transmitting and receiving a first frequency band; A type antenna includes: a first antenna disposed on the bottom plate and connected to the first side plate, the first antenna further includes a first segment antenna and a second segment antenna, the first segment antenna and the The second antenna clamps a first angle; and a second antenna is disposed on the bottom plate and connected to the second side plate. The second antenna further includes a third antenna and a fourth antenna, the The third section of the antenna and the fourth section of antenna have a second angle; a second type of antenna is respectively arranged on the first side plate and the second side plate for transmitting and receiving a second frequency band and a third frequency band; and A switching module is arranged on the substrate for switching to drive the first type antenna or drive the second type antenna. The antenna structure according to claim 1, wherein an isolation between the first antenna and the second antenna is greater than 10 dB. The antenna structure according to claim 1, wherein the first antenna section is connected to the first side plate, the third section antenna is connected to the second side plate, and the extension directions of the first section antenna and the third section antenna are approximate It is orthogonal. The antenna structure according to claim 1, wherein the extension directions of the second antenna and the fourth antenna do not intersect each other. The antenna structure according to claim 1, wherein the second antenna further includes a third antenna and a fourth antenna, the third antenna is used to transmit and receive the second frequency band, and the fourth antenna is used to transmit and receive the third antenna. Frequency band. The antenna structure according to claim 5, wherein when the second type antennas are adjacent to each other, the third antenna and the fourth antenna are arranged alternately. A mobile device, comprising: a body; and an antenna structure according to any one of claims 1 to 6, arranged in the body, wherein the first type antenna is located at a corner of the body, and the second The antenna is located on one side of the body.

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