CN113839208B - Mobile device - Google Patents

Abstract

The invention discloses a mobile device and a manufacturing method thereof. The mobile device includes: the electronic device comprises a first circuit board, a metal frame, an extension radiation part, an electronic component, a second circuit board and a radio frequency module. The first circuit board includes a system ground plane. The metal frame includes a first portion, wherein the first portion is coupled to the system ground plane. A headroom is formed between the first section and the system ground plane. The first portion and the extension radiating portion are both coupled to a feed point. The first portion and the extended radiating portion together form an antenna structure. The second circuit board is coupled to the electronic component, wherein the electronic component and the second circuit board are adjacent to the first portion. The radio frequency module is coupled to the feed-in point to excite the antenna structure.

Description

Mobile devices

This application is a divisional application of the Chinese invention patent application (application number: 201710951672.4, application date: October 13, 2017, invention name: mobile device and manufacturing method thereof).

Technical Field

The present invention relates to a mobile device, and in particular to a mobile device and an antenna structure thereof.

Background Art

With the development of mobile communication technology, mobile devices have become increasingly popular in recent years, such as laptops, mobile phones, multimedia players and other hybrid portable electronic devices. In order to meet people's needs, mobile devices usually have wireless communication functions. Some cover long-distance wireless communication ranges, such as mobile phones using 2G, 3G, LTE (Long Term Evolution) systems and the 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz and 2500MHz frequency bands used for communication, while some cover short-distance wireless communication ranges, such as Wi-Fi, Bluetooth systems use 2.4GHz and 5GHz frequency bands for communication.

In order to pursue aesthetics, designers nowadays often add metal elements to mobile devices. However, the newly added metal elements are likely to have a negative impact on the antenna used to provide wireless communication in the mobile device, thereby reducing the overall communication quality of the mobile device. Therefore, it is necessary to propose a new mobile device and antenna structure to overcome the problems faced by traditional technologies.

Summary of the invention

In a preferred embodiment, the present invention provides a mobile device, comprising: a first circuit board, comprising a system ground plane; a metal frame, comprising a first part, wherein the first part is coupled to the system ground plane, and a clearance interval is formed between the first part and the system ground plane; an extended radiating portion, wherein the first part and the extended radiating portion are both coupled to a feeding point, and the first part and the extended radiating portion together form an antenna structure; an electronic component; a second circuit board, coupled to the electronic component, wherein the electronic component and the second circuit board are both adjacent to the first part; and a radio frequency module, coupled to the feeding point to excite the antenna structure.

In some embodiments, the first portion has a first end and a second end, the first end of the first portion is coupled to a first short-circuit point on the system ground plane, and the second end of the first portion is coupled to a second short-circuit point on the system ground plane.

In some embodiments, the clearance interval is between the first short-circuit point and the second short-circuit point.

In some embodiments, the metal frame further includes a second portion, and the extended radiation portion is formed by the second portion.

In some embodiments, the first portion is in the shape of a straight strip.

In some embodiments, the extended radiation portion is in an L-shape.

In some embodiments, a vertical projection of the extended radiating portion at least partially overlaps with the second circuit board.

In some embodiments, a vertical projection of the extended radiating portion at least partially overlaps with the clearance interval.

In some embodiments, the clearance area is in the form of a long and narrow rectangle.

In some embodiments, the mobile device further includes: a feeding connector coupled between the RF module and the feeding point.

In some embodiments, the second circuit board is also coupled to the system ground plane.

In some embodiments, the antenna structure covers a low frequency band between 2400 MHz and 2500 MHz, and a high frequency band between 5150 MHz and 5875 MHz.

In some embodiments, the low frequency band is excited by the first portion, and the high frequency band is excited by the extended radiating portion.

In some embodiments, the length of the first portion is equal to 0.5 wavelengths of the low frequency band.

In some embodiments, the length of the extended radiating portion is equal to 0.25 times the wavelength of the high frequency band.

In some embodiments, the electronic component includes a power button and/or a volume button.

In some embodiments, the power button and the volume button are both disposed on the outer side of the first portion.

In some embodiments, the electronic component includes one or more sensing elements.

In some embodiments, the sensing elements are disposed inside the first portion.

In some embodiments, the first circuit board is a system circuit board, and the second circuit board is a flexible printed circuit board.

In a preferred embodiment, the present invention provides a method for manufacturing a mobile device, comprising the following steps: providing a first circuit board, a metal frame, an extended radiating portion, an electronic component, a second circuit board, and a radio frequency module, wherein the first circuit board includes a system ground plane, the metal frame includes a first portion, and the electronic component and the second circuit board are both adjacent to the first portion; coupling the first portion to the system ground plane; forming a clearance interval between the first portion and the system ground plane; coupling the first portion and the extended radiating portion to a feeding point so that the first portion and the extended radiating portion together form an antenna structure; coupling the second circuit board to the electronic component; and coupling the radio frequency module to the feeding point to excite the antenna structure.

In another preferred embodiment, the present invention provides a mobile device, comprising: a first circuit board, including a system ground plane; a metal frame, including at least a first portion, wherein the first portion is electrically coupled to the system ground plane and a feeding point, and a clearance interval is formed between the first portion and the system ground plane, wherein the first portion and the feeding point together form an antenna structure; an electronic component; a second circuit board, electrically coupled to the electronic component, wherein the electronic component and the flexible printed circuit board are both adjacent to the first portion; and a radio frequency module, electrically coupled to the feeding point to excite the antenna structure.

In another preferred embodiment, the present invention provides a method for manufacturing a mobile device, comprising the following steps: providing a system circuit board, a metal frame, an extended radiating portion, an electronic component, a flexible printed circuit board, and a radio frequency module, wherein the system circuit board includes a system ground plane, the metal frame includes a first portion, and the electronic component and the flexible printed circuit board are both adjacent to the first portion; electrically coupling the first portion to the system ground plane; forming a clearance interval between the first portion and the system ground plane; coupling the flexible printed circuit board to the electronic component; and electrically coupling the first portion and the extended radiating portion to a feeding point, coupling the radio frequency module to the feeding point, so that the first portion and the extended radiating portion can operate in multiple frequency bands.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1A is a rear view of a mobile device according to an embodiment of the present invention;

FIG1B is a side view of a mobile device according to an embodiment of the present invention;

FIG2 is a back view of an antenna structure of a mobile device according to an embodiment of the present invention;

FIG3 is a voltage standing wave ratio diagram of an antenna structure of a mobile device according to an embodiment of the present invention;

FIG4A is a rear view of a mobile device according to an embodiment of the present invention;

FIG4B is a side view of a mobile device according to an embodiment of the present invention;

FIG5 is a perspective view of a mobile device according to an embodiment of the present invention;

FIG6 is a perspective view of a mobile device according to an embodiment of the present invention;

FIG7 is a perspective view of a mobile device according to an embodiment of the present invention;

FIG8 is a perspective view of a mobile device according to an embodiment of the present invention;

FIG. 9 is a flow chart of a method for manufacturing a mobile device according to an embodiment of the present invention.

Explanation of symbols

100, 400, 500, 600, 700, 800 ~ mobile device;

110～system circuit board;

112～system ground plane;

120～Metal frame;

126～Fractured edge of metal frame;

130～the first part of the metal frame;

131-a first end of a first portion of a metal frame;

132-a second end of the first portion of the metal frame;

140～the second part of the metal frame;

150～Extended radiation part;

151-a first end of the extended radiation portion;

152-a second end of the extended radiation portion;

160, 460~Electronic components;

161～Power button;

162～Volume key;

170～Flexible printed circuit board;

171～Flexible printed circuit board connector;

172, 173 ~ bare copper area;

180～Clearance interval;

185～Display;

190～feed connector;

192～RF signal line;

199～RF module;

461～sensing element;

501～first position;

502 ~ second position;

510～main lens;

520～Non-metal back cover;

525～dividing line;

620, 720, 820 ~ back cover;

621, 721, 821 ~ Metal part of the back cover;

622, 722, 723, 822, 823, 824～Non-metallic part of the back cover;

D1～first spacing;

D2～second spacing;

FB1～low frequency band;

FB2～high frequency band;

FP～feed point;

GP1～first short circuit point;

GP2～second short-circuit point;

W3～width.

DETAILED DESCRIPTION

In order to make the purpose, features and advantages of the present invention more clearly understood, specific embodiments of the present invention are given below with reference to the accompanying drawings for detailed description as follows.

Certain words are used in the specification and claims to refer to specific components. It should be understood by those skilled in the art that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. The words "include" and "comprise" mentioned throughout the specification and claims are open-ended terms and should be interpreted as "include but not limited to". The word "substantially" means that within an acceptable error range, those skilled in the art can solve the technical problem and achieve the basic technical effect within a certain error range. In addition, the word "coupled" in this specification includes any direct and indirect electrical connection means. Therefore, if the text describes a first device coupled to a second device, it means that the first device can be directly electrically connected to the second device, or indirectly electrically connected to the second device via other devices or connection means.

FIG. 1A is a back view of a mobile device 100 according to an embodiment of the present invention. FIG. 1B is a side view of a mobile device 100 according to an embodiment of the present invention. FIG. 2 is a back view of an antenna structure of a mobile device 100 according to an embodiment of the present invention (elements other than the antenna structure are temporarily hidden). Please refer to FIG. 1A, FIG. 1B, and FIG. 2 together. The mobile device 100 may be a smart phone, a tablet computer, or a notebook computer. In the embodiments of FIG. 1A and FIG. 1B, the mobile device 100 at least includes: a system circuit board 110 (or referred to as a "first circuit board"), a metal frame 120, an extension radiation element 150, an electronic component 160, a flexible printed circuit board (FPC) 170 (or referred to as a "second circuit board"), and a radio frequency module 199. It should be understood that, although not shown in FIG. 1A and FIG. 1B , the mobile device 100 may further include other components, such as a processor, a speaker, a touch module, a power supply module, and a housing.

The system circuit board 110 includes a system ground plane 112, which is made of metal material. The system ground plane 112 can be used to provide a ground voltage. The shape and size of the system circuit board 110 and the system ground plane 112 are not particularly limited in the present invention, and can be adjusted according to different needs. The metal frame 120 can be an appearance element of the mobile device 100. The metal frame 120 includes at least a first portion 130, wherein the first portion 130 can be roughly in the shape of a straight strip. In detail, the first portion 130 has a first end 131 and a second end 132, wherein the first end 131 of the first portion 130 is coupled to a first shorting point GP1 on the system ground plane 112, and the second end 132 of the first portion 130 is coupled to a second shorting point GP2 on the system ground plane 112. A clearance region 180 is formed between the first portion 130 of the metal frame 120 and the system ground plane 112. In other embodiments, if the mobile device 100 also includes a display 185, the clearance region 180 is defined as between the first portion 130 of the metal frame 120 and the display 185. The clearance region 180 may be roughly in the form of a long and narrow rectangle and may be between the first short-circuit point GP1 and the second short-circuit point GP2. The length of the clearance region 180 is equal to or slightly less than the length of the first portion 130. The first portion 130 of the metal frame 120 is coupled to a feeding point FP, wherein the feeding point FP is between the first end 131 and the second end 132 of the first portion 130. The feeding point FP is closer to the first short-circuit point GP1 than the second short-circuit point GP2.

The extended radiation portion 150 is made of metal material. In some embodiments, the metal frame 120 further includes a second portion 140, wherein the extended radiation portion 150 is formed by the second portion 140. That is, the extended radiation portion 150 and the metal frame 120 can be an integrally formed structure. In other embodiments, the metal frame 120 does not include the second portion 140, and the extended radiation portion 150 can be printed on another flexible printed circuit board, or can be formed on a plastic support element by laser engraving technology (Laser Direct Structuring, LDS). The extended radiation portion 150 can be L-shaped. In other embodiments, the extended radiation portion 150 can also have different shapes to meet the needs of different frequencies. In detail, the extended radiation portion 150 has a first end 151 and a second end 152, wherein the first end 151 of the extended radiation portion 150 is coupled to the feed point FP, and the second end 152 of the extended radiation portion 150 is an open end (OpenEnd) extending in a direction away from the first ground point GP1. The extended radiating portion 150 may be partially parallel to the first portion 130 of the metal frame 120 and partially perpendicular to the first portion 130 of the metal frame 120. A vertical projection of the extended radiating portion 150 may at least partially overlap with the clearance interval 180. In addition, the vertical projection of the extended radiating portion 150 may also at least partially overlap with the system ground plane 112. The first portion 130 of the metal frame 130 and the extended radiating portion 150 together form an antenna structure. In other embodiments, the metal frame 130 of the mobile device 100 includes only the first portion 130 and does not include the second portion 140 (that is, the antenna structure may be changed to not include the extended radiating portion 150), but it may also play a similar function to the original antenna structure (including both the first portion 130 and the second portion 140 or the extended radiating portion 150). The RF module 199 may be disposed on the system circuit board 110. The RF module 199 may be coupled to the feed point FP to excite the aforementioned antenna structure. In some embodiments, the mobile device 100 further includes a feeding connection element 190 and a radio frequency signal line 192, wherein the feeding point FP is coupled to the radio frequency module 199 via the feeding connection element 190 and the radio frequency signal line 192. For example, the feeding connection element 190 may be a three-dimensional connection structure, such as a pogo pin, a metal spring, or a metal screw. The first portion 130 and the second portion 140 of the metal frame 120 may be disposed at one side of the mobile device 100, and the remaining portion of the metal frame 120 may be selectively distributed at a top, a bottom, or (and) another side of the mobile device 100, so that the entire metal frame 120 may be roughly in a ring shape, and the system circuit board 110 may be disposed in the hollow interior of the metal frame 120.

In the embodiment of FIG. 1A and FIG. 1B, the electronic component 160 may include at least a power button 161 or (and) a volume button 162, but the present invention is not limited thereto. In other embodiments, the electronic component 160 may also include fewer or more physical buttons or (and) slots with different functions. The flexible printed circuit board 170 is coupled to the power button 161 and the volume button 162 of the electronic component 160, wherein the electronic component 160 and the flexible printed circuit board 170 are both adjacent to the first part 130 of the metal frame 120. For example, the power button 161 and the volume button 162 may be at least partially disposed on the outside of the first part 130 of the metal frame 120 (or, the power button 161 and the volume button 162 may partially extend to the inside of the first part 130 of the metal frame 120), and the flexible printed circuit board 170 may be disposed on the inside of the first part 130 of the metal frame 120. Although not shown in FIG. 1A and FIG. 1B , the first portion 130 of the metal frame 120 may have one or more openings, so that the electronic component 160 can be coupled to the flexible printed circuit board 170 through the aforementioned openings. The flexible printed circuit board 170 can also be used to carry some traces and circuit layouts of control components.

A vertical projection of the extended radiating portion 150 at least partially overlaps with the flexible printed circuit board 170. For example, the vertical projection of the extended radiating portion 150 may be completely located inside the flexible printed circuit board 170. In some embodiments, the flexible printed circuit board 170 is also coupled to the system ground plane 112. For example, the flexible printed circuit board 170 may also include a flexible printed circuit board connector (FPC Connector) 171 and two bare copper regions (Bare Copper Regions) 172 and 173, wherein the flexible printed circuit board connector 171 and the bare copper regions 172 and 173 may penetrate the system circuit board 110 and be coupled to the system ground plane 112. In detail, the bare copper region 172 may be adjacent to the first ground point GP1, or overlap with the first ground point GP1; and the bare copper region 173 may be adjacent to the second ground point GP2, or overlap with the second ground point GP2. In this design, the electronic component 160 and the flexible printed circuit board 170 can be integrated with the aforementioned antenna structure and can be regarded as an extension of the antenna structure. Therefore, the existence of the electronic component 160 and the flexible printed circuit board 170 will not cause much interference to the radiation characteristics of the antenna structure.

In other embodiments, a metal layer (or a conductive material layer) in the flexible printed circuit board 170 may be in a C-shape or an L-shape and may extend along the outer edge of the clearance area 180 , and its vertical projection may at least partially overlap with the clearance area 180 .

In some embodiments, the mobile device 100 also includes one or more other antenna elements (not shown). The other antenna elements may be formed by the remaining portion of the metal frame 120 and may be located at a top or a bottom of the mobile device 100. The other antenna elements may also have one or more breaks. The other antenna elements may serve as the main antenna (Main Antenna) of the mobile device 100. On the other hand, because the clearance interval 180 is small, the aforementioned antenna structure may serve as an auxiliary antenna (Auxiliary Antenna) of the mobile device 100 to enhance the antenna diversity gain (Antenna Diversity Gain) of the mobile device 100. For example, the first short-circuit point GP1 may be between the antenna structure and the other antenna elements to enhance the isolation (Isolation) between the other antenna elements and the antenna structure.

FIG. 3 is a diagram showing a voltage standing wave ratio (VSWR) of an antenna structure of a mobile device 100 according to an embodiment of the present invention, wherein the horizontal axis represents the operating frequency (MHz) and the vertical axis represents the voltage standing wave ratio. According to the measurement results of FIG. 3 , the antenna structure of the mobile device 100 can cover a low frequency band FB1 between 2400MHz and 2500MHz, and a high frequency band FB2 between 5150MHz and 5875MHz. Therefore, the mobile device 100 can at least support dual-band operation of WLAN (Wireless Local Area Networks) 2.4GHz/5GHz (or Wi-Fi). The above frequency range can also be adjusted according to different needs.

The antenna principle and element size of the mobile device 100 can be described as follows. The low frequency band FB1 can be excited by the first portion 130 of the metal frame 120, and the high frequency band FB2 can be excited by the extended radiating portion 150 (or the second portion 140 of the metal frame 120). The length of the first portion 130 (i.e., the length from the first end 131 to the second end 132, or the length from the first short-circuit point GP1 to the second short-circuit point GP2) can be approximately equal to 0.5 times the wavelength (λ/2) of the low frequency band FB1. The length of the extended radiating portion 150 (i.e., the length from the first end 151 to the second end 152, or the length from the feed point FP to the second end 152) can be approximately equal to 0.25 times the wavelength (λ/4) of the high frequency band FB2. There is a first distance D1 between the feed point FP and the first end 131 (or the first short-circuit point GP1) of the first portion 130, and there is a second distance D2 between the feed point FP and the second end 132 (or the second short-circuit point GP2) of the first portion 130, wherein the ratio (D2/D1) of the second distance D2 to the first distance D1 may be approximately between 4 and 5. For example, the first distance D1 may be approximately 8.5 mm, and the second distance D2 may be approximately 35.5 mm, but is not limited thereto. The width W3 of the clearance interval 180 (i.e., the minimum distance between the first portion 130 of the metal frame 120 and the system ground plane 112 or the display 185, wherein the distance between the system ground plane 112 and the metal frame 120 may be greater than or equal to the distance between the display 185 and the metal frame 120) may be used to adjust the impedance matching and bandwidth of the aforementioned antenna structure. If the width W3 of the clearance interval 180 becomes larger, the bandwidth of the low-frequency band FB1 of the antenna structure will increase; conversely, if the width W3 of the clearance interval 180 becomes smaller, the bandwidth of the low-frequency band FB1 of the antenna structure will decrease. For example, the width W3 may be approximately 1.5 mm, but is not limited thereto. In addition, by changing the position of the feed point FP, the impedance matching of the low-frequency band FB1 can be fine-tuned. The above size range is obtained based on multiple experimental results, which can optimize the operating performance of the antenna structure of the mobile device 100. According to actual measurement results, the radiation efficiency (Radiation Efficiency) of the antenna structure of the mobile device 100 in the low-frequency band FB1 and the high-frequency band FB2 is above 13.6%, which can meet the application requirements of general mobile communication devices.

In the mobile device 100 of the present invention, since the metal frame 120 can be used as a main radiator of the antenna structure, the metal frame 120 can effectively avoid the negative impact on the communication quality of the antenna structure. Furthermore, the antenna structure can be integrated with the electronic components 160 (for example: side buttons or (and) slots) and the flexible printed circuit board 170, and with a narrow clearance area 180, the overall antenna size can be miniaturized (the side of the traditional mobile device is usually difficult to set any antenna structure due to insufficient clearance). In addition, at least there is no cut point on the first part 130 of the metal frame 120. This design can greatly improve the robustness of the mobile device 100 and take into account the product's aesthetics. The present invention can support communication technologies such as Wi-Fi, Multi-Input and Multi-Output (MIMO), etc., so it is very suitable for use in various small-sized, broadband mobile communication devices.

FIG. 4A is a back view of a mobile device 400 according to an embodiment of the present invention. FIG. 4B is a side view of a mobile device 400 according to an embodiment of the present invention. FIG. 4A and FIG. 4B are similar to FIG. 1A and FIG. 1B, and the difference between the two is that an electronic component 460 of the mobile device 400 includes one or more sensing elements (Sensing Element) 461, wherein the sensing element 461 and the flexible printed circuit board 170 are both disposed on the inner side of the first portion 130 of the metal frame 120, and the sensing element 461 and the flexible printed circuit board 170 are coupled to each other. At this time, at least on the first portion 130 of the metal frame 120, it is not necessary to design any openings due to the configuration of the sensing element 461. The sensing element 461 can be a pressure detector (PressureSensor) to sense a user's pressing state on the first portion 130 of the metal frame 120. Similarly, the aforementioned antenna structure can also be integrated with the electronic component 460 and the flexible printed circuit board 170, and with the narrow clearance space 180, so as to reduce the overall antenna size. The remaining features of the mobile device 400 and the antenna structure of FIG. 4A and FIG. 4B are similar to the mobile device 100 and the antenna structure of FIG. 1A, FIG. 1B, and FIG. 2, so both embodiments can achieve similar operating effects.

The following embodiments will introduce various other configurations of the present invention. It must be understood that these drawings and descriptions are only for example and are not intended to limit the present invention.

FIG. 5 is a perspective view of a mobile device 500 according to an embodiment of the present invention. In the embodiment of FIG. 5 , the mobile device 500 further includes a main camera 510 and a non-metal back cover 520. The main camera 510 is embedded in the non-metal back cover 520. As described above, the first portion 130 of the metal frame 120 can form an antenna structure (which can be located at a first position 501 or a second position 502), and the antenna structure can be integrated with the electronic component 160 (for example, the side buttons 161, 162 or the sensing element 461 mentioned above) and the flexible printed circuit board. A boundary 525 between the non-metal back cover 520 and the metal frame 120 is located at a back side of the mobile device 500. In other embodiments, the non-metal back cover 520 may also extend from the back side of the mobile device 500 to the side, so that the boundary 525 between the non-metal back cover 520 and the metal frame 120 is located at the side of the mobile device 500. The remaining portion of the metal frame 120 (except the first portion 130 and the second portion 140) may also have one or more cutouts 126 to adjust the impedance matching and resonant frequency of other antenna elements.

FIG. 6 is a perspective view of a mobile device 600 according to an embodiment of the present invention. In the embodiment of FIG. 6 , the mobile device 600 further includes a back cover 620. As described above, the first portion 130 of the metal frame 120 can form an antenna structure (which can be located at the first position 501 or the second position 502), and the antenna structure can be integrated with the electronic component 160 (for example, the side buttons 161, 162 or the sensing element 461) and the flexible printed circuit board. The back cover 620 includes a metal portion 621 and a non-metal portion 622, wherein the metal portion 621 is substantially rectangular, and the non-metal portion 622 is substantially ring-shaped, so that the metal portion 621 is completely surrounded by the non-metal portion 622. The non-metal portion 622 of the back cover 620 can prevent the metal portion 621 from directly contacting the first portion 130 of the metal frame 120, thereby maintaining the good communication quality of the antenna structure.

FIG. 7 is a perspective view of a mobile device 700 according to an embodiment of the present invention. In the embodiment of FIG. 7 , the mobile device 700 further includes a back cover 720. As described above, the first portion 130 of the metal frame 120 can form an antenna structure (which can be located at the first position 501 or the second position 502), and the antenna structure can be integrated with the electronic component 160 (for example, the side buttons 161, 162 or the sensing element 461) and the flexible printed circuit board. The back cover 720 includes a metal portion 721, a first non-metal portion 722, and a second non-metal portion 723, wherein the metal portion 721 is between the first non-metal portion 722 and the second non-metal portion 723, and completely separates the first non-metal portion 722 and the second non-metal portion 723. The first non-metal portion 722 of the back cover 720 can prevent its metal portion 721 from directly contacting the first portion 130 of the metal frame 120, thereby maintaining the good communication quality of the antenna structure. In some embodiments, the mobile device 700 uses a spray and coating process to reduce the visual difference between the metal portion 721 and the first non-metal portion 722 and the second non-metal portion 723 , thereby improving the appearance consistency of the mobile device 700 .

FIG8 is a perspective view showing a mobile device 800 according to an embodiment of the present invention. In the embodiment of FIG8 , the mobile device 800 further includes a back cover 820. As described above, the first portion 130 of the metal frame 120 can form an antenna structure (which can be located at the first position 501 or the second position 502), and the antenna structure can be integrated with the electronic component 160 (e.g., the side buttons 161, 162 or the sensing element 461) and the flexible printed circuit board. The back cover 820 includes a metal portion 821, a first non-metal portion 822, a second non-metal portion 823, and a third non-metal portion 824, wherein the metal portion 821 is between the first non-metal portion 822, the second non-metal portion 823, and the third non-metal portion 824. In detail, the metal portion 821 can completely separate the first non-metal portion 822, the second non-metal portion 823, and the third non-metal portion 824. Compared with the embodiment of FIG. 7 , the first non-metallic portion 822, the second non-metallic portion 823, and the third non-metallic portion 824 of the back cover 820 have different shapes. For example, the first non-metallic portion 822 may be roughly U-shaped, the second non-metallic portion 823 may be roughly rectangular, and the third non-metallic portion 824 may be roughly elongated and straight. The first non-metallic portion 822 of the back cover 820 can prevent its metal portion 821 from directly contacting the first portion 130 of the metal frame 120, thereby maintaining the good communication quality of the antenna structure. In some embodiments, the mobile device 800 also uses a spraying process to reduce the visual difference between the metal portion 821 and the first non-metallic portion 822, the second non-metallic portion 823, and the third non-metallic portion 824, thereby beautifying the appearance consistency of the mobile device 800. It should be noted that the aforementioned back cover and metal frame may be the same mechanism (both are integrally formed), or may be two independent components manufactured separately.

FIG9 is a flow chart showing a method for manufacturing a mobile device according to an embodiment of the present invention. Such a method for manufacturing includes at least the following steps. In step S910, a first circuit board, a metal frame, an extended radiating portion, an electronic component, a second circuit board, and a radio frequency module are provided, wherein the first circuit board includes a system ground plane, the metal frame includes a first portion, and the electronic component and the second circuit board are both adjacent to the first portion. In step S920, the first portion is coupled to the system ground plane. In step S930, a clearance interval is formed between the first portion and the system ground plane. In step S940, the first portion and the extended radiating portion are both coupled to a feed point, so that the first portion and the extended radiating portion together form an antenna structure. In step S950, the second circuit board is coupled to the electronic component. In step S960, the radio frequency module is coupled to the feed point to excite the antenna structure. It must be understood that the above steps do not need to be performed in sequence, and any one or more device features of FIG1A to FIG8 can be applied to the method for manufacturing the mobile device of FIG9.

It is worth noting that the above-mentioned component size, component shape, and frequency range are not limiting conditions of the present invention. Antenna designers can adjust these settings according to different needs. The mobile device and manufacturing method of the present invention are not limited to the states illustrated in Figures 1A to 9. The present invention may only include any one or more features of any one or more embodiments of Figures 1A to 9. In other words, not all of the illustrated features must be implemented simultaneously in the mobile device and manufacturing method of the present invention.

In the present specification and claims, ordinal numbers, such as "first", "second", "third", etc., have no sequential relationship with each other, and are only used to distinguish two different components with the same name.

Although the present invention is disclosed in conjunction with the above preferred embodiments, it is not intended to limit the scope of the present invention. Anyone familiar with this technology may make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the attached claims.

Claims (20)

1. A mobile device, comprising:

A first circuit board including a system ground plane;

the metal frame comprises a first part, wherein the first part is provided with an opening, the first part is coupled to the system ground plane and the feed-in point, and the first part is positioned at the side edge of the metal frame, and the first part and the feed-in point form an antenna structure;

An electronic component at least partially disposed in the opening of the first portion of the metal bezel;

The second circuit board is coupled to the electronic component and is adjacent to the first part of the metal frame; and

The radio frequency module is coupled to the feed-in point to excite the antenna structure;

Wherein the second circuit board is coupled to the first circuit board;

wherein the rest of the metal frame is provided with a plurality of fractures;

Wherein the first portion of the metal frame does not have any break, and the break is not equivalent to the opening.

2. The mobile device of claim 1, wherein the first portion has a first end and a second end, the first end of the first portion is coupled to a first shorting point on the system ground plane, and the second end of the first portion is coupled to a second shorting point on the system ground plane.

3. The mobile device of claim 2, further comprising:

a headroom region formed between the first portion and the system ground plane and between the first shorting point and the second shorting point.

4. The mobile device of claim 1, wherein the antenna structure further comprises an extended radiating portion coupled to the feeding point, wherein the extended radiating portion is formed by the second portion of the metal frame, or is printed on a flexible printed circuit board, or is formed on a plastic support element by a laser engraving technique.

5. The mobile device of claim 4, wherein the first portion and the second portion are both disposed at the side.

6. The mobile device of claim 1, further comprising:

One or more other antenna elements are formed by the remaining portion of the metal bezel and are located at the other side, top or bottom of the mobile device.

7. The mobile device of claim 6, wherein the other antenna element further has the break.

8. The mobile device of claim 4, further comprising:

A headroom region, wherein the headroom region is formed between the first portion and the system ground plane, wherein a vertical projection of the extended radiating portion at least partially overlaps the headroom region or at least partially overlaps the second circuit board.

9. The mobile device of claim 1, further comprising:

The feed-in connecting piece is coupled between the radio frequency module and the feed-in point.

10. The mobile device of claim 1, wherein the second circuit board is further coupled to the system ground plane.

11. The mobile device of claim 1, wherein the electronic component is coupled to the second circuit board through the opening.

12. The mobile device of claim 4, wherein the antenna structure covers a low frequency band and a high frequency band, wherein the low frequency band is excited by the first portion and the high frequency band is excited by the extended radiating portion.

13. The mobile device of claim 1, wherein the electronic component and the second circuit board are integrated with the antenna structure and are considered as extensions of the antenna structure.

14. The mobile device of claim 1, wherein the electronic component comprises a power key, a volume key, or a slot.

15. The mobile device of claim 14, wherein the power key and the volume key are both at least partially disposed outside of the first portion.

16. The mobile device of claim 1, further comprising:

a back cover, wherein the back cover has a metal portion and a non-metal portion, the metal portion presents a rectangular shape, and the non-metal portion presents a ring shape, such that the metal portion is completely surrounded by the non-metal portion.

17. The mobile device of claim 1, further comprising:

A back cover, wherein the back cover has a metal portion, a first non-metal portion, and a second non-metal portion, the metal portion being interposed between the first non-metal portion and the second non-metal portion and completely separating the first non-metal portion and the second non-metal portion.

18. The mobile device of claim 1, further comprising:

A back cover, wherein the back cover has a metal portion, a first non-metal portion, a second non-metal portion, and a third non-metal portion, the metal portion being interposed between the first non-metal portion, the second non-metal portion, and the third non-metal portion, the metal portion being capable of completely separating the first non-metal portion, the second non-metal portion, and the third non-metal portion.

19. The mobile device of claim 18, wherein the electronic component comprises one or more sensing elements disposed inside the metal bezel and adjacent to the third non-metal portion of the back cover.

20. The mobile device of claim 1, wherein the electronic component comprises one or more sensing elements disposed inside the metal frame at the side edge.