TWI758059B - Mobile device - Google Patents

Abstract

A mobile device includes a first circuit board, a metal frame, an electronic component, a second circuit board, and an RF (Radio Frequency) module. The first circuit board includes a system ground plane. The metal frame includes a first portion coupled to the system ground plane and a feeding point. A clearance region is formed between the first portion of the metal frame and the system ground plane. An antenna structure is formed by the first portion of the metal frame. The electronic component is at least partially disposed at the first portion of the metal frame. The second circuit board is coupled to the electronic component. The electronic component and the second circuit board are both adjacent to the first portion of the metal frame. The RF module is coupled to the feeding point, so as to excite the antenna structure. The second circuit board is coupled to the first circuit board.

Description

mobile device

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

With the development of mobile communication technology, mobile devices have become more and more common in recent years, such as laptop computers, mobile phones, multimedia players and other portable electronic devices with mixed functions. In order to meet people's needs, mobile devices usually have the function of wireless communication. Some cover long-distance wireless communication range, for example: mobile phones use 2G, 3G, LTE (Long Term Evolution) systems and their frequency bands of 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz and 2500MHz for communication, While some cover short-range wireless communication range, for example: Wi-Fi, Bluetooth systems use the 2.4GHz and 5GHz frequency bands for communication.

In order to pursue a beautiful appearance, nowadays designers often add elements of metal elements into mobile devices. However, the newly added metal element is likely to have a negative impact on the antenna used for providing 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 the conventional technology.

In a preferred embodiment, the present invention provides a mobile device comprising: a first circuit board including a system ground plane; a metal frame including a first part, wherein the first part is coupled to the a system ground plane and a feed point, a headroom is formed between the first part and the system ground plane, and the first part forms an antenna structure; an electronic component, at least partially configured on the first part of the metal frame; 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; wherein the second circuit board is coupled to the first circuit board.

In some embodiments, the mobile device further includes: an extended radiating portion coupled to the feeding point, wherein the antenna structure is jointly formed by the first portion of the metal frame and the extended radiating portion.

In some embodiments, the mobile device further includes: a clearance area formed between the first part and the system ground plane, wherein the first part has a first end and a second end, the first part The first end of a part is coupled to a first short-circuit point on the system ground plane, and the second end of the first part is coupled to a second short-circuit point on the system ground plane .

In some embodiments, the headroom 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 extending radiating portion is formed by the second portion.

In some embodiments, the first portion has a straight bar shape.

In some embodiments, the extended radiating portion presents an L-shape.

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

In some embodiments, the mobile device further includes: a clearance area formed between the first portion and the system ground plane, wherein a vertical projection of the extended radiating portion at least partially overlaps the clearance area .

In some embodiments, the clearance interval presents an elongated 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 further coupled to the system ground plane.

In some embodiments, the first portion includes one or more openings, wherein the electronic component is coupled to the second circuit board through the openings.

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 mobile device further includes: one or more other antenna elements, wherein the other antenna elements may be formed by the rest of the metal frame and located at a top or a bottom of the mobile device.

In some embodiments, the other antenna element has one or more fractures.

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

In some embodiments, both the power key and the volume key are disposed outside the first part.

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 some embodiments, the electronic component is disposed at least partially outside the first portion of the metal frame, or extends at least partially inside the first portion of the metal frame.

In some embodiments, the first portion does not have any fractures, and the fractures are not identical to the openings.

In order to make the objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are given in the following, and are described in detail as follows in conjunction with the accompanying drawings.

Certain terms are used throughout the specification and claims to refer to particular elements. It should be understood by those skilled in the art that hardware manufacturers may refer to the same element by different nouns. This specification and the scope of the patent application do not use the difference in name as a way to distinguish elements, but use the difference in function of the elements as a criterion for distinguishing. The words "including" and "including" mentioned in the entire specification and the scope of the patent application are open-ended terms, so they should be interpreted as "including but not limited to". The word "substantially" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and achieve the basic technical effect. Furthermore, the term "coupled" in this specification includes any direct and indirect electrical connection means. Therefore, if a first device is described as being 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 through other devices or connecting means. Second device.

FIG. 1A shows a rear view of a mobile device 100 according to an embodiment of the present invention. FIG. 1B shows a side view of the mobile device 100 according to an embodiment of the present invention. FIG. 2 shows a rear view of the antenna structure of the mobile device 100 according to an embodiment of the present invention (elements other than the antenna structure are temporarily hidden). Please refer to Figures 1A, 1B and 2 together. The mobile device 100 may be a smart phone (Smart Phone), a tablet computer (Tablet Computer), or a notebook computer (Notebook Computer). In the embodiment shown in FIGS. 1A and 1B, the mobile device 100 at least includes: a system circuit board 110 (or “first circuit board”), a metal frame 120, an extension Radiation part (Extension Radiation Element) 150, an electronic component (Electronic Component) 160, a flexible printed circuit board (Flexible Printed Circuit Board, FPC) 170 (or called "second circuit board"), and a radio frequency module (Radio Frequency Module) 199. It must be understood that, although not shown in FIGS. 1A and 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 casing.

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 requirements. The metal frame 120 may be an appearance element of the mobile device 100 . The metal frame 120 at least includes a first portion 130 , wherein the first portion 130 can be roughly in the shape of a straight bar. Specifically, the first part 130 has a first end 131 and a second end 132 , wherein the first end 131 of the first part 130 is coupled to a first shorting point on the system ground plane 112 Point) GP1, and the second end 132 of the first portion 130 is coupled to a second short-circuit 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 further includes a display 185 , the clearance area 180 is defined as being between the first portion 130 of the metal frame 120 and the display 185 . The clearance interval 180 may be approximately 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 interval 180 is equal to or slightly smaller 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 located 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 extending radiation part 150 is made of metal material. In some embodiments, the metal frame 120 further includes a second portion 140 , wherein the extending radiation portion 150 is formed by the second portion 140 . That is, both the extending radiation portion 150 and the metal frame 120 can be integrally formed. In other embodiments, the metal frame 120 does not include the second portion 140 , and the extended radiating portion 150 can be printed on another flexible printed circuit board, or can be formed on another flexible printed circuit board by Laser Direct Structuring (LDS). on a plastic support element. The extending radiating portion 150 may present an L-shape. In other embodiments, the extended radiating portion 150 may also have different shapes to meet the requirements of different frequencies. In detail, the extending radiating part 150 has a first end 151 and a second end 152 , wherein the first end 151 of the extending radiating part 150 is coupled to the feeding point FP, and the second end 152 of the extending radiating part 150 is An open end (Open End) extending in a direction away from the first ground point GP1. The extending radiation 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 radiation portion 150 may at least partially overlap with the clearance interval 180 . In addition, the vertical projection of the extended radiation portion 150 may 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 only includes the first part 130 and does not include the second part 140 (that is, the antenna structure can be changed to not include the extended radiating part 150 ), but the The effect is similar to that of the original antenna structure (including the first part 130 and the second part 140 or the extended radiating part 150 at the same time). The radio frequency module 199 may be disposed on the system circuit board 110 . The RF module 199 can be coupled to the feeding point FP to activate 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 through the feeding connection element 190 and the radio frequency signal line 192 Mod 199. For example, the feeding connector 190 can be a three-dimensional connecting structure, such as a Pogo Pin, a Metal Spring, or a Metal Screw. Both the first part 130 and the second part 140 of the metal frame 120 can be disposed at a side of the mobile device 100 , and the rest of the metal frame 120 can be selectively distributed on a top of the mobile device 100 At the bottom, or (and) the other side, the entire metal frame 120 can be roughly in a ring shape, and the system circuit board 110 can be disposed in the hollow interior of the metal frame 120 .

In the embodiment of FIGS. 1A and 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 sockets 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 portion 130 of the metal frame 120 . For example, the power key 161 and the volume key 162 may both be disposed at least partially outside the first portion 130 of the metal frame 120 (or, the power key 161 and the volume key 162 may partially extend to the first portion of the metal frame 120 ). the inner side of the part 130 ), and the flexible printed circuit board 170 can be disposed on the inner side of the first part 130 of the metal frame 120 . Although not shown in FIGS. 1A and 1B, the first portion 130 of the metal frame 120 may have one or more openings, so that the electronic components 160 can be coupled to the flexible printing through the openings circuit board 170 . The flexible printed circuit board 170 can further be used to carry some traces and circuit layouts of control elements.

A vertical projection of the extended radiation portion 150 at least partially overlaps the flexible printed circuit board 170 . For example, the vertical projection of the extended radiation portion 150 may be completely inside the flexible printed circuit board 170 . In some embodiments, the flexible printed circuit board 170 is further coupled to the system ground plane 112 . For example, the flexible printed circuit board 170 may further include a flexible printed circuit board connector (FPC Connector) 171 and two bare copper regions (Bare Copper Regions) 172, 173, wherein the FPC connector 171 and the bare copper regions 172, 173 It can penetrate the system circuit board 110 and be coupled to the system ground plane 112 . Specifically, the bare copper region 172 may be adjacent to or coincide with the first ground point GP1 ; and the bare copper region 173 may be adjacent to or coincide with the second ground point GP2 . Under 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 It will not cause too 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 have a C-shape or an L-shape, and may extend along the outer edge of the clearance area 180 , and its vertical projection It may then at least partially overlap with the clearance interval 180 .

In some embodiments, the mobile device 100 further includes one or more other antenna elements (not shown). Other antenna elements may be formed from the rest of the metal frame 120 and may be located at a top or a bottom of the mobile device 100 . Other antenna elements may have one or more fractures. Other antenna elements can be used as the main antenna of the mobile device 100 . On the other hand, because the headroom 180 is small, the aforementioned antenna structure can be used as an auxiliary antenna of the mobile device 100 to increase the antenna diversity gain of the mobile device 100 . For example, the first short-circuit point GP1 may be located between the antenna structure and other antenna elements to enhance isolation between the other antenna elements and the antenna structure.

FIG. 3 shows a voltage standing wave ratio (VSWR) diagram of the antenna structure of the 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 in 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 component size of the mobile device 100 can be as follows. The low frequency band FB1 can be excited by the first part 130 of the metal frame 120 , and the high frequency frequency band FB2 can be excited by the extension radiating part 150 (or the second part 140 of the metal frame 120 ). The length of the first portion 130 (ie, 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) may be approximately equal to 0.5 times the low frequency band FB1 wavelength (λ/2). The length of the extended radiation portion 150 (ie, the length from the first end 151 to the second end 152, or the length from the feeding point FP to the second end 152) may be approximately equal to 0.25 times the wavelength of the high frequency band FB2 ( λ/4). There is a first distance D1 between the feeding point FP and the first end 131 (or the first short-circuit point GP1 ) of the first part 130 , and the feeding point FP and the second end 132 (or the first short circuit point GP1 ) of the first part 130 There is a second distance D2 between the second short-circuit points GP2), 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 about 8.5mm, and the second distance D2 may be about 35.5mm, but not limited thereto. The width W3 of the clearance area 180 (that is, the minimum distance between the first part 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 display 185 and the metal frame 120 . The distance between the frames 120 can be used to adjust the impedance matching (Impedance Matching) and the bandwidth (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; on the contrary, 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 about 1.5 mm, but is not limited thereto. In addition, by changing the position of the feeding point FP, the impedance matching of the low frequency band FB1 can be fine-tuned. The above size ranges are obtained based on multiple experimental results, which can optimize the operational performance of the antenna structure of the mobile device 100 . According to the actual measurement results, the radiation efficiency (Radiation Efficiency) of the antenna structure of the mobile device 100 in both 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 one of the main radiators of the antenna structure, the negative influence of the metal frame 120 on the communication quality of the antenna structure can be effectively avoided. Furthermore, the antenna structure can be integrated with the electronic components 160 (eg, side buttons or (and) sockets) and the flexible printed circuit board 170, and is matched with a narrow clearance area 180, so that the overall antenna size can be reduced (traditional). The side of the mobile device is usually difficult to install any antenna structure due to insufficient headroom). In addition, at least the first part 130 of the metal frame 120 does not have any cut points. This design can greatly improve the robustness of the mobile device 100 and take into account the appearance of the product. The present invention can support communication technologies such as Wi-Fi, Multi-Input and Multi-Output (MIMO), etc., so it is very suitable to be applied to various small-sized and wide-band mobile communication devices.

FIG. 4A shows a rear view of a mobile device 400 according to an embodiment of the present invention. FIG. 4B shows a side view of the mobile device 400 according to an embodiment of the present invention. Figures 4A and 4B are similar to Figures 1A and 1B, the difference between the two is that an electronic component 460 of the mobile device 400 includes one or more sensing elements 461, wherein the sensing elements 461 and the flexible printing The circuit boards 170 are all disposed inside the first part 130 of the metal frame 120 , and the sensing element 461 and the flexible printed circuit board 170 are coupled to each other. In this case, at least on the first portion 130 of the metal frame 120 , it is not necessary to design any openings due to the arrangement of the sensing elements 461 . The sensing element 461 can be a pressure sensor to sense the pressing state of the first part 130 of the metal frame 120 by a user. Similarly, the aforementioned antenna structure can also be integrated with the electronic component 460 and the flexible printed circuit board 170, and is matched with a narrow clearance area 180, so that the overall antenna size can be reduced. The other features of the mobile device 400 and the antenna structure in FIGS. 4A and 4B are similar to the mobile device 100 and the antenna structure in FIGS. 1A, 1B and 2, so the two embodiments can achieve similar operational effects.

The following embodiments will introduce various other configurations of the present invention. It must be understood that these drawings and descriptions are only examples 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 lens 510 is embedded in the non-metal back cover 520 . As mentioned 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 combined with the electronic components 160 (eg, the aforementioned The side buttons 161, 162 or the sensing element 461) and the flexible printed circuit board are integrated with each other. 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 can also extend from the back 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 rest of the metal frame 120 (except the first portion 130 and the second portion 140 ) may further have one or more fractures 126 to adjust the impedance matching and resonance 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 mentioned 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 combined with the electronic component 160 (eg, the aforementioned side The keys 161, 162 or the sensing element 461) and the flexible printed circuit board are integrated with each other. The back cover 620 includes a metal part 621 and a non-metal part 622, wherein the metal part 621 is roughly rectangular, and the non-metal part 622 is roughly a ring shape, so that the metal part 621 is formed by the non-metal part. 622 is completely surrounded. The non-metal part 622 of the back cover 620 can prevent the metal part 621 from directly contacting the first part 130 of the metal frame 120, thereby maintaining 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 mentioned 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 combined with the electronic component 160 (eg, the aforementioned side The keys 161, 162 or the sensing element 461) and the flexible printed circuit board are integrated with each other. The back cover 720 includes a metal part 721, a first non-metal part 722, and a second non-metal part 723, wherein the metal part 721 is interposed between the first non-metal part 722 and the second non-metal part between the parts 723, and the first non-metallic part 722 and the second non-metallic part 723 are completely separated. The first non-metallic portion 722 of the back cover 720 can prevent the metal portion 721 from directly contacting the first portion 130 of the metal frame 120, thereby maintaining good communication quality of the antenna structure. In some embodiments, the mobile device 700 adopts a spray and coating process to reduce the visual difference between the metal part 721 and the first non-metal part 722 and the second non-metal part 723, so as to beautify Appearance consistency of the mobile device 700 .

FIG. 8 is a perspective view of a mobile device 800 according to an embodiment of the present invention. In the embodiment of FIG. 8 , the mobile device 800 further includes a back cover 820 . As mentioned 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 combined with the electronic component 160 (eg, the aforementioned side The keys 161, 162 or the sensing element 461) and the flexible printed circuit board are integrated with each other. The back cover 820 includes a metal part 821, a first non-metal part 822, a second non-metal part 823, and a third non-metal part 824, wherein the metal part 821 is between the first non-metal part 824 portion 822 , the second non-metallic portion 823 , and the third non-metallic portion 824 . In detail, the metal part 821 can completely separate the first non-metal part 822 , the second non-metal part 823 , and the third non-metal part 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 the metal portion 821 from directly contacting the first portion 130 of the metal frame 120, thereby maintaining good communication quality of the antenna structure. In some embodiments, the mobile device 800 further adopts a spray coating process to reduce the visual difference between the metal part 821 and the first non-metal part 822 , the second non-metal part 823 and the third non-metal part 824 , Therefore, the appearance consistency of the mobile device 800 can be beautified. It must be noted that the aforementioned back cover and metal frame may be the same mechanical component (both are integrally formed), or may be two independent components manufactured separately.

FIG. 9 is a flow chart showing a manufacturing method of a mobile device according to an embodiment of the present invention. This manufacturing method 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 A first part is included, and both the electronic components and the second circuit board are adjacent to the first part. In step S920, the first part is coupled to the system ground plane. In step S930, a clearance area is formed between the first part and the system ground plane. In step S940, both the first part and the extended radiating part are coupled to a feeding point, so that the first part and the extended radiating part together form an antenna structure. In step S950, the second circuit board is coupled to the electronic components. In step S960, the RF 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 a plurality of device features in FIGS. 1-8 can be applied to the manufacturing method of the mobile device in FIG. 9 .

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

The ordinal numbers in this specification and the scope of the patent application, such as "first", "second", "third", etc., do not have a sequential relationship with each other, and are only used to mark and distinguish two identical different elements of the name.

Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the scope of the present invention. Anyone skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the scope of the appended patent application.

100,400,500,600,700,800: Mobile Devices 110: System board 112: System ground plane 120: Metal frame 126: The fracture of the metal frame 130: The first part of the metal frame 131: The first end of the first part of the metal frame 132: The second end of the first part of the metal frame 140: The second part of the metal frame 150: Extended Radiation 151: Extending the first end of the radiating part 152: Extending the second end of the radiating part 160,460: Electronic components 161: Power button 162: Volume keys 170: Flexible Printed Circuit Board 171: Flexible Printed Circuit Board Connector 172,173: Bare Copper Area 180: Clearance range 185: Display 190: Feed-in connector 192: RF signal line 199: RF Module 461: Sensing element 501: First position 502: Second position 510: Main Shot 520: non-metal back cover 525: dividing line 620,720,820: Back cover 621,721,821: Metal part of back cover 622,722,723,822,823,824: Non-metallic part of back cover D1: The first spacing D2: The second spacing FB1: low frequency band FB2: high frequency band FP: Feed Point GP1: The first short circuit point GP2: Second short circuit point W3: width

FIG. 1A shows a rear view of a mobile device according to an embodiment of the present invention. FIG. 1B shows a side view of a mobile device according to an embodiment of the present invention. FIG. 2 is a rear view showing an antenna structure of a mobile device according to an embodiment of the present invention. FIG. 3 shows a voltage standing wave ratio diagram of an antenna structure of a mobile device according to an embodiment of the present invention. FIG. 4A shows a rear view of a mobile device according to an embodiment of the present invention. FIG. 4B shows a side view of a mobile device according to an embodiment of the present invention. FIG. 5 is a perspective view of a mobile device according to an embodiment of the present invention. FIG. 6 is a perspective view of a mobile device according to an embodiment of the present invention. FIG. 7 is a perspective view of a mobile device according to an embodiment of the present invention. FIG. 8 is a perspective view of a mobile device according to an embodiment of the present invention. FIG. 9 is a flow chart showing a manufacturing method of a mobile device according to an embodiment of the present invention.

100: Mobile Devices

110: System board

112: System ground plane

120: Metal frame

130: The first part of the metal frame

140: The second part of the metal frame

150: Extended Radiation

160: Electronic Components

161: Power button

162: Volume keys

170: Flexible Printed Circuit Board

171: Flexible Printed Circuit Board Connector

172,173: Bare Copper Area

180: Clearance range

185: Display

199: RF Module

FP: Feed Point

GP1: The first short-circuit point

GP2: Second short circuit point

Claims (23)

A mobile device, comprising: a first circuit board including a system ground plane; a metal frame including a first portion, wherein the first portion is coupled to the system ground plane and a feed point, and a headroom is formed between the first portion and the system ground plane, and the first portion forms an antenna structure; an electronic component at least partially disposed on the first part of the metal frame; a second circuit board coupled to the electronic component, wherein both the electronic component and the second circuit board are adjacent to the first portion; and a radio frequency module coupled to the feed point to excite the antenna structure; Wherein the second circuit board is coupled to the first circuit board. The mobile device as claimed in claim 1, further comprising: An extended radiating part is coupled to the feeding point, wherein the antenna structure is jointly formed by the first part of the metal frame and the extended radiating part. The mobile device as claimed in claim 1, further comprising: A clearance area is formed between the first part and the system ground plane, wherein the first part has a first end and a second end, and the first end of the first part is coupled to A first short circuit point on the system ground plane, and the second end of the first part is coupled to a second short circuit point on the system ground plane. The mobile device of claim 3, wherein the clearance area is between the first short-circuit point and the second short-circuit point. The mobile device according to claim 2, wherein the metal frame further comprises a second part, and the extending radiating part is formed by the second part. The mobile device as claimed in claim 1, wherein the first part is in the shape of a straight bar. The mobile device as claimed in claim 2, wherein the extending radiating portion presents an L-shape. The mobile device of claim 2, wherein a vertical projection of the extending radiation portion at least partially overlaps the second circuit board. The mobile device according to claim 2, further comprising: A clearance area is formed between the first part and the system ground plane, wherein a vertical projection of the extending radiating portion at least partially overlaps the clearance area. The mobile device according to claim 3, wherein the clearance area presents a long and narrow rectangle. The mobile device as claimed in claim 1, further comprising: A feeding connector is coupled between the radio frequency module and the feeding point. The mobile device of claim 1, wherein the second circuit board is further coupled to the system ground plane. The mobile device of claim 1, wherein the first portion includes one or more openings, wherein the electronic component is coupled to the second circuit board through the openings. The mobile device of claim 13, wherein the low frequency band is excited by the first part, and the high frequency band is excited by the extended radiation part. The mobile device as claimed in claim 13, further comprising: One or more other antenna elements, wherein the other antenna elements may be formed from the rest of the metal frame and located at a top or a bottom of the mobile device. The mobile device of claim 15, wherein the other antenna element further has one or more fractures. The mobile device of claim 13, wherein the electronic component includes a power button, a volume button, or a slot. The mobile device as claimed in claim 17, wherein the power button and the volume button are both disposed outside the first part. The mobile device of claim 1, wherein the electronic component includes one or more sensing elements. The mobile device as claimed in claim 19, wherein the sensing elements are disposed inside the first part. The mobile device of claim 1, wherein the first circuit board is a system circuit board, and the second circuit board is a flexible printed circuit board. The mobile device as claimed in claim 1, wherein the electronic component is at least partially disposed outside the first portion of the metal frame, or extends at least partially to the first portion of the metal frame inside of the portion. The mobile device of claim 16, wherein the first portion does not have any fracture, and the fracture is not equal to the opening.

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