CN113140889A

CN113140889A - Mobile device

Info

Publication number: CN113140889A
Application number: CN202010067167.5A
Authority: CN
Inventors: 陈静雯; 张家豪
Original assignee: Wistron Neweb Corp
Current assignee: Wistron Neweb Corp
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2021-07-20

Abstract

A mobile device is provided. The mobile device includes: a metal shell, a substrate, a grounding metal piece, a first radiation piece, a second radiation piece and a switch element; the metal shell comprises a body part and a slotted hole arranged on the body part; the substrate is arranged on the metal shell; the grounding metal piece is arranged on the substrate and coupled to the metal shell; the vertical projection of the first radiation piece on the metal shell is at least partially overlapped with the slot; the second radiation piece is arranged on the substrate, and the vertical projection of the second radiation piece on the metal shell is at least partially overlapped with the slotted hole; the switch element is arranged on the substrate and coupled between the second radiation piece and the grounding metal piece; when the switch element is switched to a first mode, the first radiation element and the second radiation element generate a first radiation field pattern, and when the switch element is switched to a second mode, the first radiation element and the second radiation element generate a second radiation field pattern. The invention can adjust the value of the return loss and/or the radiation pattern.

Description

Mobile device

Technical Field

The present invention relates to a mobile device, and more particularly, to a mobile device with an antenna structure.

Background

First, in the prior art, in order to achieve an attractive appearance and strength, most of the mobile devices have metal housings. However, due to the characteristics of the metal housing, the antenna in the mobile device is easily affected, thereby reducing the communication quality of the mobile device.

Therefore, how to improve the communication quality of the mobile device by improving the structural design to overcome the above-mentioned drawbacks has become one of the important issues to be solved by this technology.

Therefore, it is desirable to provide a mobile device to solve the above problems.

Disclosure of Invention

The present invention is directed to a mobile device, which overcomes the shortcomings of the prior art.

In order to solve the above technical problem, one of the technical solutions of the present invention is to provide a mobile device, including: the antenna comprises a metal shell, a substrate, a grounding metal piece, a first radiation piece, a second radiation piece and a switch element. The metal shell comprises a body part and a slot hole arranged on the body part. The substrate is disposed on the metal housing. The grounding metal piece is arranged on the substrate and coupled to the metal shell. The first radiation element has a feeding part, and the first radiation element includes a first feeding branch, a second feeding branch and a third feeding branch, wherein the vertical projection of the first radiation element on the metal shell at least partially overlaps the slot, wherein one end of the first feeding branch is coupled to the feeding part, the first feeding branch has a first polygon having at least a major axis and a minor axis, and the major axis of the first polygon extends along a first direction, wherein one end of the second feeding branch is coupled to the feeding part, the second feeding branch has a second polygon having at least a major axis and a minor axis, the major axis of the second polygon extends along a second direction opposite to the first direction, and wherein one end of the third feeding branch is coupled to the feeding part, the third feeding branch has a third polygon, the third polygon has at least a long axis and a short axis, and the long axis of the third polygon extends along the first direction. The second radiation element is arranged on the substrate, and the vertical projection of the second radiation element on the metal shell is at least partially overlapped with the slotted hole. The switch element is arranged on the substrate and coupled between the second radiation piece and the grounding metal piece, wherein when the switch element is switched to a first mode, the first radiation piece and the second radiation piece generate a first radiation field type, and when the switch element is switched to a second mode, the first radiation piece and the second radiation piece generate a second radiation field type.

One of the advantages of the present invention is that the mobile device provided by the present invention can adjust the value of the return loss (return loss) and/or the radiation field type by "the switch element is coupled between the second radiation element and the grounding metal element" and "when the switch element is switched to a first mode, the first radiation element and the second radiation element generate a first radiation field type", and when the switch element is switched to a second mode, the first radiation element and the second radiation element generate a second radiation field type ".

For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.

Drawings

Fig. 1 is a perspective assembly diagram of a mobile device according to a first embodiment of the invention.

Fig. 2 is an exploded perspective view of the mobile device according to the first embodiment of the invention.

Fig. 3 is another exploded perspective view of the mobile device according to the first embodiment of the invention.

Fig. 4 is a further exploded perspective view of the mobile device according to the first embodiment of the invention.

Fig. 5 is another exploded perspective view of the mobile device according to the first embodiment of the invention.

Fig. 6 is a front view of the mobile device according to the first embodiment of the present invention.

Fig. 7 is another front view of the mobile device according to the first embodiment of the invention.

Fig. 8 is an enlarged schematic view of section VIII of fig. 7.

Fig. 9 is a schematic view of another embodiment of fig. 8.

Fig. 10 is a schematic diagram of the switching element of fig. 7.

Fig. 11 is a schematic diagram of another embodiment of a switching element of the mobile device according to the first embodiment of the present invention.

Fig. 12 is a schematic diagram of the return loss of the embodiment of fig. 7.

Fig. 13 is a front view of a mobile device according to a second embodiment of the present invention.

Fig. 14 is another front view of the mobile device according to the second embodiment of the invention.

Fig. 15 is a front view of a mobile device according to a third embodiment of the invention.

Fig. 16 is a front view of a mobile device according to a fourth embodiment of the invention.

Description of the main component symbols:

u mobile device

1 Metal housing

11 body part

12 slotted hole

121. 122 closed end

2 base plate

21 first surface

22 second surface

23 ground metal layer

3 grounding metal piece

4 first radiation element

40 feed-in part

41 first feeding branch

42 second feeding branch

43 third feeding branch

5 second radiation element

51 first body part

52 second body part

53 connecting part

54 ground connection

6 third radiation element

7 feed-in element

71 feed-in terminal

72 ground terminal

8 support plate

80 ground connection member

9 conductive barrier

GC1 first coupling gap

GC2 second coupling gap

SW switch element

SW1, SW2, SW3, SW4, SW5 and SW6 pins

E1 first electronic component

E2 second electronic component

First curve of M1

Second curve of M2

X, Y, Z direction

Detailed Description

The following is a description of the embodiments of the present disclosure related to "mobile devices" with specific embodiments, and those skilled in the art will understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the specification and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used primarily to distinguish one element from another. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.

[ first embodiment ]

First, referring to fig. 1 to 5, fig. 1 is a perspective assembly diagram of a mobile device according to a first embodiment of the present invention, fig. 2, fig. 4 and fig. 5 are perspective exploded diagrams of the mobile device according to the first embodiment of the present invention, respectively, and in addition, in order to present a part of the components of the mobile device, a part of the components (metal housing 1) is omitted in fig. 3. The present invention provides a mobile device U, which may be a Smart Phone (Smart Phone), a Tablet Computer (Tablet Computer) or a Notebook Computer (Notebook Computer), but the present invention is not limited thereto. In addition, the mobile device U provided by the present invention includes an antenna structure (the antenna structure may be composed of a metal housing 1, a slot 12, a grounding metal member 3, a first radiating element 4, a second radiating element 5 and a switch element SW) for receiving and transmitting Radio Frequency (RF) signals. The mobile device U can generate a first operating frequency band and a second operating frequency band, and the center frequency of the second operating frequency band is greater than the center frequency of the first operating frequency band. For example, the mobile device U can generate a first operating band with a frequency range between 2400MHz and 2500MHz and a second operating band with a frequency range between 5150MHz and 5875MHz, but the invention is not limited thereto.

In view of the above, the moving device U includes: a metal housing 1, a substrate 2, a grounding metal member 3, a first radiation member 4, a second radiation member 5 and a switch element SW. For example, the metal housing 1 may be a metal cover of the mobile device U, the grounding metal member 3, the first radiating member 4, the second radiating member 5 and the switch element SW may be disposed on the substrate 2, and the substrate 2 may be disposed on the metal housing 1 or adjacent to the metal housing 1, but the invention is not limited thereto. In addition, in one embodiment, a plurality of locking holes (not numbered) may be disposed on the substrate 2, so that the substrate 2 can be fixed on the metal housing 1 by a plurality of locking members (not shown). In addition, it should be noted that, although other components are not shown in the drawings, in practical applications, the mobile device U may further include other elements, such as but not limited to: a Processor (Processor), a Touch Control Panel (Touch Panel), a Speaker (Speaker), a Battery Module (Battery Module), and a Housing (Housing). It should be noted that the term "adjacent" in this specification may refer to a distance between two corresponding elements being less than a predetermined distance (for example, but not limited to, 5 mm or less), and may also include a case where two corresponding elements are in direct contact with each other (i.e., the distance is shortened to 0).

In light of the above, the metal shell 1 includes a body 11 and a Slot 12(Slot) disposed on the body 11, for example, the Slot 12 may be a substantially straight-bar-shaped opening or a rectangular opening. In the present invention, the Slot 12 is a Closed Slot (Closed Slot) and rectangular, and has two Closed ends (Closed ends) 121 and 122 away from each other. However, in other embodiments, the Slot 12 may be a Monopole Slot (Monopole Slot) having an Open End (Open End) and a closed End that are remote from each other. In the present invention, the antenna structure is composed of a metal casing 1, a slot 12, a grounding metal member 3, a first radiation member 4, a second radiation member 5 and a switch element SW.

In addition, the substrate 2 can be, for example, an FR4 (film resistor 4) substrate, a Printed Circuit Board (PCB) or a Flexible Printed Circuit Board (FPCB), but the invention is not limited thereto. In addition, for example, the first radiation element 4 and the second radiation element 5 can be made of a metal sheet, a metal wire or other conductive material with conductive effect, such as: copper, silver, aluminum, iron or alloys thereof, but the present invention is not limited thereto. For example, the first radiation element 4 and the second radiation element 5 of the present invention can be formed on the substrate 2 by using a Laser-Direct-Structuring (LDS) technique, however, in other embodiments, the first radiation element 4 and the second radiation element 5 can also be metal layers in a multi-layer board, and the present invention is not limited thereto.

Next, referring to fig. 1 to 5 together with fig. 6, fig. 6 is a front view of the mobile device according to the first embodiment of the present invention. In detail, the substrate 2 includes a first surface 21 and a second surface 22 corresponding to the first surface 21, the first radiation element 4 is disposed on the first surface 21, and the second radiation element 5 and the switch element SW are disposed on the second surface 22, however, in other embodiments, the second radiation element 5 may also be disposed on the first surface 21, and the invention is not limited thereto. It is noted that, with the present invention, the substrate 2 may be coated with a ground metal layer 23, and the ground metal layer 23 may be coated on the first surface 21 and/or the second surface 22. In addition, the second surface 22 of the substrate 2 can be adjacent to or against the metal casing 1, and the substrate 2 is disposed adjacent to the slot 12, so that the substrate 2 almost completely covers the slot 12 of the metal casing 1.

In view of the above, the grounding metal member 3 is disposed on the first surface 21 and/or the second surface 22 of the substrate 2 and coupled to the body portion 11 of the metal housing 1, and the grounding metal member 3 and the metal housing 1 can provide a Ground potential (Ground Voltage) of the mobile device U. It should be noted that the grounding metal piece 3 is disposed on the first surface 21 of the substrate 2 and coupled to the metal housing 1 as an exemplary illustration. In addition, the grounding metal piece 3 may be coupled between the grounding metal layer 23 and the metal housing 1 according to the present invention, however, in other embodiments, the grounding metal layer 23 may not be provided. For example, the grounding metal member 3 may be a grounding Copper Foil (Ground Copper Foil), which may extend from the substrate 2 to the metal housing 1, but the invention is not limited thereto.

In view of the above, the first radiation element 4 is disposed on the substrate 2 and has a feeding portion 40, and the first radiation element 4 includes a first feeding branch 41, a second feeding branch 42 and a third feeding branch 43. The combination of the first feeding branch 41, the second feeding branch 42 and the third feeding branch 43 can form a Y-shaped structure surrounding the feeding portion 40. Furthermore, it is worth mentioning that the perpendicular projection of the first radiation element 4 on the metal casing 1 at least partially overlaps the slot 12. That is, a portion of at least one of the first feeding branch 41, the second feeding branch 42 and the third feeding branch 43 is vertically projected on the metal casing 1 and overlaps with the slot 12. In addition, according to the present invention, the perpendicular projection of the second radiation element 5 on the metal casing 1 at least partially overlaps the slot 12.

Further, the mobile device U may further include: a feeding element 7, the feeding element 7 is coupled between the feeding portion 40 of the first radiating element 4 and the grounding metal element 3 for receiving and transmitting a signal. For example, the feeding element 7 can be a Coaxial cable (Coaxial cable), but the invention is not limited thereto. In addition, the feeding element 7 may have a feeding end 71 and a grounding end 72, the feeding end 71 may be coupled to the feeding portion 40 of the first radiating element 4, and the grounding end 72 may be coupled to the grounding metal element 3. Furthermore, in one embodiment, the ground terminal 72 may also be coupled to the ground metal layer 23 and indirectly coupled to the ground metal 3 through the ground metal layer 23, which is not limited in the present invention.

Next, please refer to fig. 7, wherein fig. 7 is a front view of a mobile device according to a first embodiment of the present invention. The substrate 2 is omitted in fig. 7 for clarity of showing the positional relationship among the metal housing 1, the grounding metal member 3, the first radiating member 4, the second radiating member 5 and a switching element SW. In detail, one end of the first feeding branch 41 may be coupled to the feeding element 40, and the first feeding branch 41 has a first Polygon (Polygon) which may substantially present a rectangle or an L-shape. One End of the first feeding branch 41 is coupled to the feeding portion 40, and the other End of the first feeding branch 41 is an Open End (Open End). The first polygon has at least a major axis and a minor axis, and the major axis of the first polygon extends along a first direction (negative X direction) relative to the feeding portion 40. For example, the long axis of the first polygon may be a first virtual straight line passing through the open end and parallel to the X-axis. In addition, for example, the first feeding branch 41 and the slot 12 of the metal housing 1 can be excited to generate the first operating frequency band. However, it should be noted that the present invention is not limited by the above-mentioned examples.

In addition, one end of the second feeding branch 42 is coupled to the feeding portion 40, and the second feeding branch 42 has a second polygon, which may substantially present a rectangle or an L-shape. One end of the second feeding branch 42 is coupled to the feeding element 40, and the other end of the second feeding branch 42 is an open end. The second polygon at least has a major axis and a minor axis, the major axis of the second polygon extends along a second direction (positive X direction) opposite to the first direction with respect to the feeding portion 40. For example, the long axis of the second polygon may be a second virtual straight line passing through the open end and parallel to the X-axis. In addition, for example, the second feeding branch 42 can be activated to generate a second operating frequency band. However, it should be noted that the present invention is not limited by the above-mentioned examples.

In addition, one end of the third feeding branch 43 is coupled to the feeding portion 40, and the third feeding branch 43 has a third polygon, which may substantially present a rectangle, an L-shape or a U-shape. One end of the third feeding branch 43 is coupled to the feeding element 40, and the other end of the third feeding branch 43 is an open end. The third polygon has at least a major axis and a minor axis, and the major axis of the third polygon extends along the first direction relative to the feeding portion 40. For example, the long axis of the third polygon may be a third virtual straight line passing through the open end and parallel to the X-axis. Furthermore, for example, the third feeding branch 43 can be used to increase the radiation efficiency and the operating bandwidth of the first operating band and the second operating band. However, it should be noted that the present invention is not limited by the above-mentioned examples.

In light of the above, each of the first feeding branch 41, the second feeding branch 42 and the third feeding branch 43 is at least partially parallel to the slot 12 of the metal housing 1. In some embodiments, a long axis of the slot 12 (passing through the two closed ends 121, 122) is parallel to the long axis of the first feeding branch 41, the long axis of the second feeding branch 42, and the long axis of the third feeding branch 43. In addition, the first feeding branch 41 and the third feeding branch 43 are coupled to each other.

As mentioned above, for example, the length of the slot 12 may be approximately equal to 0.5 times the wavelength of the center frequency of the first operating band, the length of the first feeding branch 41 may be approximately equal to 0.25 times the wavelength of the center frequency of the first operating band, the length of the second feeding branch 42 may be approximately equal to 0.25 times the wavelength of the center frequency of the first operating band, and the length of the third feeding branch 43 may be approximately between 0.125 times and 0.25 times the wavelength of the center frequency of the first operating band, which should not be construed as a limitation.

Next, please refer to fig. 8, in which fig. 8 is an enlarged view of a portion VIII of fig. 7. According to the present invention, a first Coupling Gap GC1 is formed between the first feeding branch 41 and the third feeding branch 43, the second feeding branch 42 and the grounding metal element 3 are coupled to each other, and a second Coupling Gap GC2 is formed between the second feeding branch 42 and the grounding metal element 3. For example, in the embodiment of fig. 8, the width of the first coupling gap GC1 may be smaller than or equal to the width of the slot 12, and the width of the second coupling gap GC2 may be larger than or equal to the width of the slot 12, but the invention is not limited thereto. Thus, the present invention can adjust the impedance matching by adjusting the width of the first coupling gap GC1 and the width of the second coupling gap GC 2.

As shown in fig. 9, fig. 9 is a schematic view of another embodiment of fig. 8. As can be seen from a comparison between fig. 9 and fig. 8, the biggest difference between fig. 9 and fig. 8 is: in the embodiment of fig. 9, the width of the second coupling gap GC2 can be changed to adjust the impedance matching between the second feeding branch 42 and the grounding metal piece 3. In addition, for the embodiment of fig. 9, the width of the second coupling gap GC2 may be smaller than or equal to the width of the slot 12, but the invention is not limited thereto.

Next, referring to fig. 3, the mobile device U may further include a conductive blocking element 9, and the conductive blocking element 9 may be disposed on the substrate 2 and coupled to the grounding metal element 3. In the present invention, the conductive barrier 9 may be disposed on the second surface 22 of the substrate 2, and the conductive barrier 9 may be coupled to the ground metal layer 23, so as to be indirectly coupled to the ground metal 3 by the ground metal layer 23. However, in other embodiments, the conductive barrier 9 may be disposed on the first surface 21 of the substrate 2, which is not limited by the invention.

In view of the above, the vertical projection of the conductive barrier 9 on the metal casing 1 can form a projection shape having a recess (not numbered), and the vertical projection of the first radiation element 4 and the second radiation element on the metal casing is located in the recess. Therefore, the conductive barrier 9 is used to shield other electronic components of the mobile device U from interfering with the first radiator 4 and the second radiator 5. Meanwhile, the conductive barrier 9 also has an effect similar to a reflective plate, so as to concentrate the radiation pattern generated by the antenna structure toward the direction of the slot 12 through the conductive barrier 9. for example, the conductive barrier 9 may be a conductive foam, but the invention is not limited thereto.

In addition, it should be noted that the coupling in the present invention can be directly or indirectly connected, or directly or indirectly connected, and the present invention is not limited thereto. It should be noted that the coupling in the present invention is that two elements are separated from each other and have no physical connection, but the electric field energy (electric field energy) generated by the current of one element excites the electric field energy of the other element.

Next, referring to fig. 7 and fig. 10, fig. 10 is a schematic diagram of the switching element of fig. 7, and the switching element SW of fig. 10 is exemplarily illustrated in a circuit type. For the present invention, the second radiation element 5 and the switch element SW are disposed on the second surface 22 of the substrate 2, however, in other embodiments, the second radiation element 5 and/or the switch element SW may also be disposed on the first surface 21 of the substrate 2, so that the first radiation element 4, the second radiation element 5 and/or the switch element SW are disposed on the same surface of the substrate 2, but the present invention is not limited thereto. It should be noted that, according to the present invention, the second radiator 5 and the switch element SW can be disposed on a carrier 8, and the carrier 8 can be disposed on the substrate 2, so that the second radiator 5 and the switch element SW are disposed on the second surface 22 of the substrate 2 through the carrier 8. For example, the carrier 8 may be a Flexible Printed Circuit Board (FPCB), but the invention is not limited thereto.

In summary, the switch element SW is coupled between the second radiation element 5 and the grounding metal element 3, when the switch element SW is switched to a first mode, the first radiation element 4 and the second radiation element 5 generate a first radiation field pattern, and when the switch element SW is switched to a second mode, the first radiation element 4 and the second radiation element 5 generate a second radiation field pattern, and the first radiation field pattern is different from the second radiation field pattern. In one embodiment, when the switch element SW is switched to a first mode, the second radiating element 5 and the grounding metal element 3 are in a conducting state, that is, the pin SW3 can be selectively connected to the pin SW4, SW5 or SW 6; when the switch element SW is switched to a second mode, the second radiating element 5 and the grounding metal element 3 are in a non-conducting state (non-conducting state), i.e., the pin SW3 is not connected to the pin SW4, SW5 or SW 6. It should be noted that, in another embodiment, the second mode may also be a conduction state between the second radiation element 5 and the grounding metal element 3, but is different from the conduction path of the first mode, for example: in the first mode, the SW3 is connected to the SW5, and in the second mode, the SW3 is connected to the SW 6. In other words, the conduction or non-conduction between the second radiation element 5 and the grounding metal element 3 can be controlled by the switching of the switch element SW to generate the first mode, the second mode or other modes. Therefore, the radiation field type can be adjusted by using whether the second radiation piece 5 is conducted or not or the conduction path of the grounding metal piece 3 is different. It should be noted that the switch element SW can be controlled by a circuit board (not shown) in the mobile device U to switch the mode of the switch element SW. In addition, it should be noted that the carrier 8 may include a grounding element 80, and the embodiment of the present invention is exemplified by the switching element SW coupled between the second radiating element 5 and the grounding element 80, the grounding element 80 coupled to the conductive barrier element 9, and the conductive barrier element 9 coupled to the grounding metal layer 23 and coupled to the grounding metal element 3 through the grounding metal layer 23, however, in other embodiments, the grounding element 80 may be directly coupled to the grounding metal layer 23 by using a via (via hole) on the carrier 8, which is not limited in the present invention.

In view of the above, the second radiation element 5 may be coupled to the first radiation element 4, that is, the second radiation element 5 may be coupled to the first feeding branch 41, the second feeding branch 42 and/or the third feeding branch 43. For example, in one embodiment, a vertical projection of the second radiation element 5 on the metal shell 1 may also partially overlap with a vertical projection of the first feeding branch 41, the second feeding branch 42 and/or the third feeding branch 43 on the metal shell 1, but the invention is not limited thereto. In addition, it should be noted that although the second radiation element 5 is disposed adjacent to the first feeding branch 41 in the embodiment of the present invention as an exemplary illustration, in other embodiments, the second radiation element 5 may be adjacent to the second feeding branch 42 or the third feeding branch 43 to adjust the coupling amount between the second radiation element 5 and the first radiation element 4. However, it should be noted that, in a preferred embodiment, no matter the second radiation element 5 is coupled to the first feeding branch 41, the second feeding branch 42 or the third feeding branch 43, a vertical projection of the second radiation element 5 on the metal casing 1 at least partially overlaps the slot 12, that is, the second radiation element 5 is coupled to at least one of the first feeding branch 41, the second feeding branch 42 or the third feeding branch 43, and a vertical projection of the second radiation element 5 on the metal casing 1 at least partially overlaps the slot 12.

In view of the above, the second radiation element 5 may include a first body portion 51 and a connection portion 53 connected to the first body portion 51, and the connection portion 53 may be coupled to the switch element SW, so that the first body portion 51 is coupled to the switch element SW through the connection portion 53. In addition, the first body 51 may have a fourth polygon, which may substantially present a rectangle or an L-shape. One end of the first body 51 is coupled to the connecting portion 53, and the other end of the first body 51 is an open end. The fourth polygon has at least a major axis and a minor axis, and the major axis of the fourth polygon extends along the second direction relative to the connecting portion 53. For example, the long axis of the fourth polygon may be a fourth virtual straight line passing through the open end and parallel to the X-axis. In addition, the width of the open end adjacent to the first body portion 51 may be wide to adjust the coupling amount between the second radiation member 5 and the first radiation member 4 by using the width thereof.

Next, referring to fig. 11, fig. 11 is a schematic diagram of another embodiment of a switch element of a mobile device according to a first embodiment of the invention. As is clear from a comparison between fig. 11 and fig. 10, in the embodiment of fig. 11, the state of the switching element SW can be changed. For the embodiment of fig. 11, the switch device SW may include six pins (SW1, SW2, SW3, SW4, SW5 and SW6), wherein one pin SW1 may be coupled to VDD, and the other pin SW2 may be coupled to VCC to supply power by VDD and VCC. In addition, the other pin SW3 of the switch element SW can be coupled to the connection portion 53 of the second radiating element 5, and the other pin SW4 can be coupled to the grounding metal element 3, so that the two pins are utilized to control whether the second radiating element 5 and the grounding metal element 3 are conducted or not. In addition, the other pin SW5 and the other pin SW6 of the switch element SW can be coupled to the grounding metal member 3, and a first electronic element E1 can be connected in series between the other pin SW5 and the grounding metal member 3, and a second electronic element E2 can be connected in series between the other pin SW6 and the grounding metal member 3. For example, the first electronic element E1 and the second electronic element E2 may be resistors, inductors and/or capacitors, so as to utilize the characteristics of the first electronic element E1 and the second electronic element E2 to adjust the impedance matching of the mobile device U and adjust the value of the return loss and/or the radiation field pattern, however, it should be noted that the present invention is not limited to the type of the first electronic element E1 and the second electronic element E2.

Thus, in the embodiment of fig. 11, when the switching element SW is switched to the first mode, the second radiating element 5 and the ground metal element 3 may be in a conducting state, and a conducting path between the second radiating element 5 and the ground metal element 3 may be directly coupled to the ground metal element 3 through another pin SW4, coupled to the first electronic element E1 in series through another pin SW5 to the ground metal element 3, or coupled to the second electronic element E2 in series through another pin SW6 to the ground metal element 3, so as to adjust the value of the return loss and/or the radiation field pattern.

Next, please refer to fig. 12, in which fig. 12 is a schematic diagram illustrating a return loss of the embodiment of fig. 7. When the switching element SW is switched to a first mode, the second radiating element 5 and the grounding metal element 3 are in a conducting state, i.e., a state of the first curve M1 can be generated. When the switching element SW is switched to a second mode, the second radiating element 5 and the grounding metal element 3 are in a non-conducting state, i.e., a state of generating the second curve M2. Preferably, for the purposes of the present invention, the center frequency of the second operating band generated by the first mode is different from the center frequency of the second operating band generated by the second mode. Therefore, the center frequency of the second operating frequency band and the radiation pattern of the antenna structure can be changed by switching the switch element SW.

[ second embodiment ]

First, please refer to fig. 13, wherein fig. 13 is a front view of a mobile device according to a second embodiment of the present invention. As can be seen from a comparison between fig. 13 and fig. 7, the greatest difference between the second embodiment and the first embodiment is: the mobile device U provided in the second embodiment may further include: a third radiating element 6. The third radiation element 6 is disposed on the substrate 2 and coupled to the grounding metal element 3. In the present invention, the third radiation element 6 is exemplarily described as being disposed on the second surface 22 of the substrate 2, however, in other embodiments, the third radiation element 6 may be disposed on the first surface 21 of the substrate 2, and the present invention is not limited thereto. In addition, it should be noted that the third radiation element 6 is coupled to the grounding element 80 on the carrier 8, and is indirectly coupled to the grounding metal element 3 by coupling the grounding element 80 to the grounding metal layer 23. It should be noted that other configurations of the mobile device U provided in the second embodiment are similar to those of the first embodiment, and are not described herein again.

As described above, the perpendicular projection of the third radiation member 6 on the metal case 1 extends in the direction toward the slot 12 with respect to the direction in which the ground metal member projects. In other words, the third radiating element 6 can extend directly from the grounding metal element 3, and the extending direction of the third radiating element 6 is the direction from the grounding metal element 3 to the slot 12. Furthermore, the vertical projection of the third radiation element 6 on the metal casing 1 may at least partially overlap the slot 12, however, in other embodiments, the vertical projection of the third radiation element 6 on the metal casing 1 may not overlap the slot 12.

In view of the above, the third radiation element 6 may be disposed adjacent to the first feeding branch 41 or the third feeding branch 43 to be coupled to the first feeding branch 41 or the third feeding branch 43. It should be noted that the present invention is exemplified by the embodiment that the third radiation element 6 is disposed adjacent to the first feeding branch 41 and the third feeding branch 43, but the present invention is not limited thereto. Thereby, the impedance matching, the radiation pattern and/or the gain of the mobile device U can be adjusted by utilizing the coupling amount between the third radiation element 6 and the first feeding branch 41 and the third feeding branch 43. Preferably, the impedance matching of the second operating band between 5150MHz and 5875MHz can also be adjusted.

Next, referring to fig. 14, fig. 14 is another schematic front view of a mobile device according to a second embodiment of the invention. As can be seen from a comparison between fig. 14 and fig. 13, the biggest difference between fig. 14 and fig. 13 is: in the embodiment of fig. 14, the position of the third radiating element 6 can be adjusted to adjust the amount of coupling of the third radiating element 6 with respect to the first radiating element 4.

[ third embodiment ]

First, please refer to fig. 15, in which fig. 15 is a front view of a mobile device according to a third embodiment of the present invention. As can be seen from a comparison between fig. 15 and fig. 7, the greatest difference between the third embodiment and the first embodiment is: the second radiation element 5 of the mobile device U provided by the third embodiment further includes a second body portion 52. In detail, as shown in fig. 15, the second radiation element 5 includes a first body portion 51, a second body portion 52 and a connection portion 53 connected between the first body portion 51 and the second body portion 52, and the connection portion 53 is coupled to the switch element SW. Thus, a T-shaped structure is formed, and the second radiation element 5 is used to adjust the impedance matching of the antenna structure. It should be noted that other configurations of the mobile device U provided in the third embodiment are similar to those of the first embodiment, and are not described herein again.

In view of the above, the first body 51 has a fourth polygon, which may be a rectangle or an L-shape. One end of the first body 51 is coupled to the connecting portion 53, and the other end of the first body 51 is an open end. The fourth polygon at least has a long axis and a short axis, and the long axis of the fourth polygon extends along the second direction. For example, the long axis of the fourth polygon may be a fourth virtual straight line passing through the open end and parallel to the X-axis. In addition, the second body 52 has a fifth polygon, which may substantially present a rectangle or an L-shape. One end of the second body portion 52 is coupled to the connecting portion 53, and the other end of the first body portion 51 is an open end. The fifth polygon has at least a long axis and a short axis, and the long axis of the fifth polygon extends along the first direction. For example, the long axis of the fifth polygon may be a fifth virtual straight line passing through the open end and parallel to the X-axis. Thereby, the adjustment is performed by the first body 51 and the second body 52.

[ fourth embodiment ]

First, please refer to fig. 16, wherein fig. 16 is a front view of a mobile device according to a fourth embodiment of the present invention. As can be seen from a comparison between fig. 16 and fig. 7, the biggest difference between the fourth embodiment and the first embodiment is: the second radiating element 5 may further include a grounding portion 54, such that when the switch element SW is switched to the first mode, the connecting portion 53 and the grounding portion 54 of the second radiating element 5 are coupled to the grounding metal 3 at the same time, so that the second radiating element 5 forms a Planar Inverted-F Antenna (PIFA) and the second radiating element 5 is used to adjust the impedance matching of the Antenna structure. It should be noted that other configurations of the mobile device U provided in the fourth embodiment are similar to those of the first embodiment, and are not described herein again.

In detail, the second radiation element 5 may include a first body 51, a connection portion 53 connected to the first body 51, and a grounding portion 54 connected to the first body 51. The connecting portion 53 may be coupled to the switching element SW, and the grounding portion 54 is coupled to the grounding metal 3. In addition, in one embodiment, the grounding portion 54 is coupled between the second radiating element 5 and the grounding element 80, and the grounding element 80 is coupled to the grounding metal layer 23 and/or the conductive blocking element 9 and is coupled to the grounding metal element 3 through the grounding metal layer 23 and/or the conductive blocking element 9. It should be noted that, according to the present invention, the grounding portion 54 of the second radiator 5 is closer to the first radiator 4 than the connecting portion 53.

[ advantageous effects of the embodiments ]

One of the advantages of the present invention is that the moving device U provided by the present invention can be coupled between the second radiation element 5 and the grounding metal element 3 through the "switch element SW" and the "when the switch element SW is switched to a first mode, the first radiation element 4 and the second radiation element 5 generate a first radiation field type, and when the switch element SW is switched to a second mode, the first radiation element 4 and the second radiation element 5 generate a second radiation field type" to adjust the value of the return loss (return loss) and/or the radiation field type.

It should be noted that the system of the mobile device U can switch the mode of the switch element SW according to the actual communication requirement, so as to provide a better communication quality. Therefore, the antenna structure in the mobile device U of the invention can be an intelligent antenna structure.

The disclosure is only a preferred embodiment of the invention and should not be taken as limiting the scope of the invention, so that the invention is not limited by the disclosure of the invention.

Claims

1. A mobile device, comprising:

a metal shell, which comprises a body part and a slot hole arranged on the body part;

a substrate disposed on the metal shell;

a grounding metal piece arranged on the substrate and coupled to the metal shell;

a first radiation element having a feeding portion, wherein the first radiation element includes a first feeding branch, a second feeding branch and a third feeding branch, wherein a vertical projection of the first radiation element on the metal casing at least partially overlaps the slot, wherein one end of the first feeding branch is coupled to the feeding portion, the first feeding branch has a first polygon having at least a long axis and a short axis, and the long axis of the first polygon extends along a first direction, wherein one end of the second feeding branch is coupled to the feeding portion, the second feeding branch has a second polygon having at least a long axis and a short axis, the long axis of the second polygon extends along a second direction opposite to the first direction, and wherein one end of the third feeding branch is coupled to the feeding portion, the third feeding branch has a third polygon, the third polygon has at least a long axis and a short axis, and the long axis of the third polygon extends along the first direction;

the second radiation piece is arranged on the substrate, and the vertical projection of the second radiation piece on the metal shell is at least partially overlapped with the slotted hole; and

the switch element is arranged on the substrate and coupled between the second radiation piece and the grounding metal piece, wherein when the switch element is switched to a first mode, the first radiation piece and the second radiation piece generate a first radiation field pattern, and when the switch element is switched to a second mode, the first radiation piece and the second radiation piece generate a second radiation field pattern.

2. The mobile device according to claim 1, wherein the second radiating element is coupled to the first feeding branch, the second feeding branch or the third feeding branch.

3. The mobile device of claim 1, further comprising: and a third radiation element disposed on the substrate and coupled to the grounding metal element, wherein a vertical projection of the third radiation element on the metal shell at least partially overlaps the slot.

4. The mobile device according to claim 3, wherein the third radiating element is disposed adjacent to the first feeding branch or the third feeding branch to couple to the first feeding branch or the third feeding branch.

5. The mobile device of claim 1, wherein the second radiating element comprises a first body portion, a second body portion, and a connecting portion connected between the first body portion and the second body portion, and the connecting portion is coupled to the switch element; the first body part is provided with a fourth polygon, the fourth polygon is provided with at least a long axis and a short axis, the long axis of the fourth polygon extends along the second direction, the second body part is provided with a fifth polygon, the fifth polygon is provided with at least a long axis and a short axis, and the long axis of the fifth polygon extends along the first direction.

6. The mobile device of claim 1, wherein the second radiating element comprises a first body portion, a connecting portion coupled to the first body portion, and a grounding portion coupled to the first body portion, the connecting portion being coupled to the switch element, and the grounding portion being coupled to the grounding metal element.

7. The mobile device of claim 1, wherein the mobile device is capable of generating a first operating frequency band and a second operating frequency band, and a center frequency of the second operating frequency band generated by the first mode is different from a center frequency of the second operating frequency band generated by the second mode.

8. The mobile device of claim 1, further comprising: a conductive blocking element, disposed on the substrate and coupled to the grounding metal element, wherein a vertical projection of the conductive blocking element on the metal casing can form a projection shape having a recess, and vertical projections of the first and second radiation elements on the metal casing are located in the recess.

9. The mobile device of claim 8 wherein the conductive barrier is a conductive foam.

10. The mobile device of claim 1, further comprising: the feed-in element is coupled between the feed-in part of the first radiation element and the grounding metal element, and comprises a feed-in end and a grounding end, wherein the feed-in end is coupled with the feed-in part of the first radiation element, and the grounding end is coupled with the grounding metal element.

11. The mobile device according to claim 1, wherein a first coupling gap is formed between the first feeding branch and the third feeding branch, and a width of the first coupling gap is smaller than or equal to a width of the slot.