TWI549355B - Mobile device - Google Patents

Description

Mobile device

The present invention relates to a mobile device, and more particularly to a mobile device and an antenna structure formed by a conductive frame.

With the development of mobile communication technologies, mobile devices have become more and more popular in recent years, such as portable 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-range wireless communication range, for example, mobile phones use 2G, 3G, LTE (Long Term Evolution) systems and the 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz and 2500MHz bands used for communication, and Some cover short-range wireless communication ranges, such as Wi-Fi, Bluetooth, and WiMAX (Worldwide Interoperability for Microwave Access) systems using 2.4 GHz, 3.5 GHz, 5.2 GHz, and 5.8 GHz bands for communication.

In order to look good, the mobile device is often designed with some metal appearances, such as a Metal Back Cover or a Metal Frame. However, these metal appearance parts are likely to have a negative impact on the antenna structure for wireless communication in the mobile device, thereby reducing the communication quality of the mobile device.

In order to solve the foregoing problems, the present invention provides a mobile device comprising: a dielectric substrate; a grounding element disposed on the dielectric substrate; a signal source; a first conductive frame; a second conductive frame; and a third conductive frame The first conductive frame, the second conductive frame, and the third conductive frame are separated from each other; a first short circuit portion, wherein the second conductive frame is coupled to the ground element via the first short circuit portion a feed portion coupled to the signal source; a first radiating portion coupled to the feed portion and having an open end, wherein the open end of the first radiating portion is adjacent to the second conductive frame; And a second radiating portion coupled to the feeding portion and having an open end, wherein the open end of the second radiating portion is adjacent to the third conductive frame; wherein an antenna structure is at least by the feeding portion, The first radiating portion, the second radiating portion, the second conductive frame, and the first shorting portion are formed together.

100, 400, 500‧‧‧ mobile devices

110‧‧‧Media substrate

115‧‧‧No grounding area

120‧‧‧ Grounding components

131‧‧‧First conductive border

132‧‧‧Second conductive border

133‧‧‧ Third conductive border

141‧‧‧First short circuit

142‧‧‧Second short circuit

143‧‧‧ Third short circuit

150‧‧‧Feeding Department

161‧‧‧First Radiation Department

162‧‧‧Second Radiation Department

163‧‧‧Open end of the first radiation department

164‧‧‧Open end of the second radiation department

190‧‧‧Signal source

FB1‧‧‧ first frequency band

FB2‧‧‧second frequency band

G1‧‧‧ first gap

G2‧‧‧Second gap

G3‧‧‧ third gap

GC1‧‧‧First coupling gap

GC2‧‧‧Second coupling gap

1A is a perspective view showing a mobile device according to an embodiment of the present invention; FIG. 1B is a plan view showing a mobile device according to an embodiment of the present invention; and FIG. 2 is a view showing an embodiment of the present invention. FIG. 3 is a diagram showing an antenna efficiency diagram of an antenna structure of a mobile device according to an embodiment of the present invention; FIG. 4 is a diagram showing an antenna efficiency diagram of an antenna structure according to an embodiment of the present invention; a perspective view of the mobile device; Figure 5 is a perspective view showing a mobile device according to an embodiment of the present invention.

In order to make the objects, features and advantages of the present invention more comprehensible, the specific embodiments of the invention are set forth in the accompanying drawings.

1A is a perspective view showing a mobile device 100 according to an embodiment of the present invention. FIG. 1B is a plan view showing a mobile device 100 according to an embodiment of the present invention. Please refer to Figures 1A and 1B together. The mobile device 100 can be a smart phone or a tablet computer. As shown in FIG. 1A and FIG. 1B, the mobile device 100 includes at least a dielectric substrate 110, a grounding component 120, a first conductive frame 131, a second conductive frame 132, a third conductive frame 133, and a first short circuit. The portion 141, a feeding portion 150, a first radiating portion 161, a second radiating portion 162, and a signal source 190. The dielectric substrate 110 can be a system circuit board or a FR4 (Flame Retardant 4) substrate. The grounding element 120 may be a ground plane disposed on the dielectric substrate 110. In some embodiments, the grounding element 120, the first conductive bezel 131, the second conductive bezel 132, the third conductive bezel 133, the first shorting portion 141, the feeding portion 150, the first radiating portion 161, and the second radiating portion 162 They are all made of metal, such as silver, copper, aluminum, or iron. It should be understood that the mobile device 100 may further include other components, such as a processor, a touch panel, a touch module, a speaker, a battery module, and a casing (not shown).

The first conductive frame 131, the second conductive frame 132, and the third conductive frame 133 are separated from each other. As shown in Figures 1A and 1B, the first conductive A first gap G1 is formed between the frame 131 and the second conductive frame 132, and a second gap G2 is formed between the second conductive frame 132 and the third conductive frame 133, and the first conductive frame 131 and the third conductive frame 133 are A third gap G3 is formed therebetween. In some embodiments, the mobile device 100 further includes a non-conductor housing (not shown). The non-conductor outer casing can be made of plastic. The first conductive frame 131, the second conductive frame 132, and the third conductive frame 133 may be disposed on an outer surface of the non-conductor housing, and the remaining components of the mobile device 100 (eg, the dielectric substrate 110, the grounding member 120, etc. ) can be placed in the non-conductor housing. The first conductive frame 131 may or may not be coupled to the ground element 120. The second conductive bezel 132 may be coupled to the ground element 120 via the first shorting portion 141 . In some embodiments, a portion of the first shorting portion 141 is implemented as a pedestal (Pogo Pin) or a metal spring (Metal Spring). The third conductive bezel 133 may be floated without being coupled to the ground element 120. In some embodiments, the length of the first conductive bezel 131 is much greater than the length of the second conductive bezel 132 and is much larger than the length of the third electrically conductive bezel 133. In some embodiments, the length of the second conductive bezel 132 is greater than the length of the third conductive bezel 133. In more detail, the first conductive frame 131 may be substantially U-shaped, the second conductive frame 132 may be substantially in an L shape, and the third conductive frame 133 may also be substantially in an L shape. It should be noted that the shapes of the first conductive frame 131, the second conductive frame 132, and the third conductive frame 133 are not limitations of the present invention. In other embodiments, any of the first conductive bezel 131, the second conductive bezel 132, and the third conductive bezel 133 may also be a straight strip or a J-shape to be compatible with the edge shape of the non-conductor outer casing.

In the mobile device 100, an antenna structure may be at least provided by the feeding portion 150, the first radiating portion 161, the second radiating portion 162, and the second conductive frame 132. And the first short circuit portion 141 is formed together. The detailed composition of the antenna structure can be as described in the following embodiments.

The feed portion 150 is coupled to the signal source 190. The feeding portion 150 may be substantially perpendicular to the first radiating portion 161, the second radiating portion 162, and the dielectric substrate 110. In some embodiments, the feed portion 150 is implemented as a thimble or a metal dome. One of the feeding ends of the first radiating portion 161 is coupled to the feeding portion 150, and one of the open ends 163 of the first radiating portion 161 is adjacent to the second conductive frame 132. The first radiating portion 161 may extend substantially along the first shorting portion 141 and the second conductive bezel 132 and adjacent to the first shorting portion 141 and the second conductive bezel 132. In some embodiments, a first coupling gap GC1 is formed between the open end 163 of the first radiating portion 161 and the second conductive frame 132, and the first coupling gap GC1 is preferably less than 1 mm. The length of the first radiating portion 161 may be approximately equal to the sum of the lengths of the first shorting portion 141 and the second conductive bezel 132. The length of the first radiating portion 161 may be greater than the length of the second radiating portion 162, and the width of the first radiating portion 161 may be smaller than the width of the second radiating portion 162. One of the feeding ends of the second radiating portion 162 is coupled to the feeding portion 150, and one of the open ends 164 of the second radiating portion 162 is adjacent to the third conductive bezel 133. At least a portion of the second radiating portion 162 may extend substantially along the third conductive bezel 133. It must be noted that the first radiating portion 161 is separated from the second conductive frame 132 and the first shorting portion 141, and the second radiating portion 162 is separated from the third conductive frame 133, wherein the feeding energy from the signal source 190 is The transfer between the aforementioned elements is achieved by a mechanism of mutual coupling.

In some embodiments, the first radiating portion 161 and the second radiating portion 162 are located on a plane (for example, a virtual plane, a non-conductor supporting planar element, or a flexible printed circuit board (Flexible Printed Circuit Board). FPCB)), and the plane is separated from the dielectric substrate 110 and substantially parallel to the dielectric substrate 110. The dielectric substrate 110 may further have a non-ground region 115. The non-grounded region 115 may be adjacent to one of the edges of the dielectric substrate 110 and may be substantially rectangular. In some embodiments, the first radiating portion 161 has a first projection on the dielectric substrate 110, the second radiating portion 162 has a second projection on the dielectric substrate 110, and the first shorting portion 141 has a dielectric substrate 110 thereon. A third projection, wherein the first projection, the second projection, and the third projection are all located in the non-ground region 115. In more detail, the first radiating portion 161 may be substantially a U-shape, and the second radiating portion 162 may be substantially a J-shape. It must be noted that the shapes of the first radiating portion 161 and the second radiating portion 162 are not limitations of the present invention. In other embodiments, either of the first radiating portion 161 and the second radiating portion 162 may be a straight strip or an L shape to be compatible with the shape of the second conductive bezel 132 or the third conductive bezel 133.

In some embodiments, the component dimensions of the mobile device 100 can be as described below. The grounding element 120 has a length of about 110 mm and a width of about 65 mm. The groundless region 115 has a length of about 12 mm and a width of about 65 mm. The first conductive frame 131 has a length of about 281 mm and a height of about 5 mm. The second conductive frame 132 has a length of about 50 mm and a height of about 5 mm. The third conductive frame 133 has a length of about 37 mm and a height of about 5 mm. The first gap G1 is approximately 2 mm. The second gap G2 is approximately 2 mm. The third gap G3 is approximately 2 mm. The first short-circuit portion 141 has a length of about 43 mm and a width of about 1 mm. The first radiating portion 161 has a length of about 86 mm and a width of about 1 mm. The second radiating portion 162 has a length of about 35 mm and a width of about 3.5 mm. The first coupling gap GC1 is approximately 0.5 mm. The overall height of the antenna structure on the dielectric substrate 110 is about 5 mm.

2 is a diagram showing a return loss 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 return loss (dB). As shown in FIG. 2, the antenna structure of the mobile device 100 is operative to generate at least a first frequency band FB1 and a second frequency band FB2. In terms of the antenna principle, the first radiating portion 161 is excited to generate a first resonant mode (baseband resonant mode) and a second resonant mode (higher order resonant mode), and the second radiating portion 162 is excited to generate a first a third resonant mode, and the second conductive frame 132 and the first shorting portion 141 are excited to generate a fourth resonant mode, wherein the first resonant mode and the fourth resonant mode form a first lower frequency The frequency band FB1, and the second resonant mode and the third resonant mode form together to form a second frequency band FB2 of a higher frequency. In the preferred embodiment, the first frequency band FB1 is between about 700 MHz and 960 MHz, and the second frequency band FB2 is between about 1710 MHz and 1990 MHz. Therefore, the antenna structure of the mobile device 100 can cover at least the LTE (Long Term Evolution) 700/800/1800 band and the GSM (Global System for Mobile Communications) 850/900/1800/1900 band, so that LTE/WWAN (Wireless) can be achieved. Wide Area Network) Multi-frequency operation.

3 is a diagram showing an antenna efficiency 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 antenna efficiency (%). As shown in FIG. 3, the antenna structure of the mobile device 100 has an antenna efficiency of about 43% to 83% in the first frequency band FB1, and an antenna efficiency of about 51% in the second frequency band FB2. Between 62%, it can meet the needs of practical applications.

A mobile device of the present invention includes an antenna structure formed by a plurality of separated conductive bezels and a plurality of monopole radiating portions. Due to the conductive edges The frame is part of the antenna structure and they will not adversely affect the radiation performance of the antenna structure. Conversely, the conductive bezels provide an additional resonant path to the antenna structure such that the antenna structure covers a wide frequency band without occupying too much internal space of the mobile device. The invention has the dual advantages of improving the appearance of the appearance and maintaining the radiation efficiency of the antenna, and is very suitable for being applied to various miniaturized mobile communication devices.

Figure 4 is a perspective view showing a mobile device 400 according to an embodiment of the present invention. Figure 4 is similar to Figure 1. In the embodiment of FIG. 4, the mobile device 400 further includes a second shorting portion 142, and the antenna structure of the mobile device 400 further includes a third conductive frame 133 and a second shorting portion 142. The second short-circuit portion 142 is made of metal such as silver, copper, aluminum, or iron. In some embodiments, a portion of the second shorting portion 142 is implemented with a thimble or a metal dome. The third conductive frame 133 is further coupled to the grounding element 120 via the second shorting portion 142 . A second coupling gap GC2 is further formed between the open end 164 of the second radiating portion 162 and the third conductive frame 133, wherein the second coupling gap GC2 is preferably less than 1 mm. The third conductive frame 133 and the second short circuit portion 142 are excited to generate a fifth resonance mode, so that the antenna structure of the mobile device 400 can further cover the WCDMA (Wideband Code Division Multiple Access) Band 1 frequency band. The remaining features of the mobile device 400 of FIG. 4 are similar to those of the mobile device 100 of FIG. 1, so that the two embodiments can achieve similar operational effects.

Figure 5 is a perspective view showing a mobile device 500 according to an embodiment of the present invention. Figure 5 is similar to Figure 1. In the embodiment of FIG. 5, the mobile device 500 further includes a third shorting portion 143. The third short-circuit portion 143 is made of metal such as silver, copper, aluminum, or iron. In some embodiments, the third short circuit The portion 143 is implemented by a thimble or a metal dome. The second radiating portion 162 is further coupled to the grounding element 120 via the third shorting portion 143. The third shorting portion 143 is adjacent and parallel to the feeding portion 150. The feed portion 150, the third short circuit portion 143, and the second radiation portion 162 of the mobile device 500 may form a Planar Inverted F Antenna (PIFA) having better impedance matching. The remaining features of the mobile device 500 of FIG. 5 are similar to those of the mobile device 100 of FIG. 1, so that the two embodiments can achieve similar operational effects.

It is to be noted that the above-described component sizes, component parameters, component shapes, and frequency ranges are not limitations of the present invention. The antenna designer can adjust these settings according to different needs. Further, the antenna structure of the present invention is not limited to the state illustrated in Figs. 1-5. The present invention may include only any one or more of the features of any one or a plurality of embodiments of Figures 1-5. In other words, not all illustrated features must be implemented simultaneously in the mobile device of the present invention and its antenna structure.

The ordinal numbers in this specification and the scope of the patent application, such as "first", "second", "third", etc., have no sequential relationship with each other, and are only used to indicate that two are identical. Different components of the name.

The present invention has been described above with reference to the preferred embodiments thereof, and is not intended to limit the scope of the present invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧ mobile devices

110‧‧‧Media substrate

115‧‧‧No grounding area

120‧‧‧ Grounding components

131‧‧‧First conductive border

132‧‧‧Second conductive border

133‧‧‧ Third conductive border

141‧‧‧First short circuit

150‧‧‧Feeding Department

161‧‧‧First Radiation Department

162‧‧‧Second Radiation Department

163‧‧‧Open end of the first radiation department

164‧‧‧Open end of the second radiation department

190‧‧‧Signal source

G1‧‧‧ first gap

G2‧‧‧Second gap

G3‧‧‧ third gap

GC1‧‧‧First coupling gap

Claims (23)

A mobile device includes: a dielectric substrate; a grounding component disposed on the dielectric substrate; a signal source; a first conductive frame; a second conductive frame; a third conductive frame, wherein the first conductive frame, The second conductive frame and the third conductive frame are separated from each other; a first shorting portion, wherein the second conductive frame is coupled to the grounding element via the first shorting portion; a feeding portion coupled to a signal source; a first radiating portion coupled to the feeding portion and having an open end, wherein the open end of the first radiating portion is adjacent to the second conductive frame; and a second radiating portion coupled Connecting to the feeding portion, and having an open end, wherein the open end of the second radiating portion is adjacent to the third conductive frame; wherein an antenna structure is at least the feeding portion, the first radiating portion, the first The second radiating portion, the second conductive bezel, and the first shorting portion are formed together. The mobile device of claim 1, further comprising: a non-conductor housing, wherein the first conductive bezel, the second conductive bezel, and the third conductive bezel are disposed on the non-conductor housing. The mobile device of claim 1, wherein the first conductive frame is coupled to the grounding element. The mobile device of claim 1, wherein the third conductive frame is floating and not coupled to the grounding element. The mobile device of claim 1, wherein a first gap is formed between the first conductive frame and the second conductive frame, and a second is formed between the second conductive frame and the third conductive frame. a gap is formed, and a third gap is formed between the first conductive frame and the third conductive frame. The mobile device of claim 1, wherein the length of the first conductive frame is greater than the length of the second conductive frame and greater than the length of the third conductive frame. The mobile device of claim 1, wherein the length of the first radiating portion is approximately equal to a sum of lengths of the first shorting portion and the second conductive frame. The mobile device of claim 1, wherein the first conductive frame is substantially U-shaped. The mobile device of claim 1, wherein the second conductive frame is substantially in an L shape. The mobile device of claim 1, wherein the third conductive frame is substantially in an L shape. The mobile device of claim 1, wherein the first radiating portion and the second radiating portion are located on a plane separated from the dielectric substrate and substantially parallel to the dielectric substrate. The mobile device of claim 11, wherein the feeding portion is substantially perpendicular to the first radiating portion, the second radiating portion, and the dielectric substrate. The mobile device of claim 11, wherein the dielectric substrate further has a non-grounding region, the first radiating portion has a first projection on the dielectric substrate, and the second radiating portion is on the dielectric substrate. The second short circuit has a third projection on the dielectric substrate, and the first projection, the second projection, and the third projection are all located in the ungrounded region. The mobile device of claim 1, wherein the first radiating portion extends substantially along the first shorting portion and the second conductive frame, and adjacent to the first shorting portion and the second conductive portion. frame. The mobile device of claim 1, wherein a first coupling gap is formed between the open end of the first radiating portion and the second conductive frame, and the first coupling gap is less than 1 mm. The mobile device of claim 1, wherein the length of the first radiating portion is greater than the length of the second radiating portion. The mobile device of claim 1, wherein the width of the first radiating portion is smaller than the width of the second radiating portion. The mobile device of claim 1, wherein the first radiating portion is substantially U-shaped. The mobile device of claim 1, wherein the second radiating portion is substantially in a J shape. The mobile device of claim 1, wherein the antenna structure is configured to generate a first frequency band and a second frequency band, wherein the first frequency band is between 700 MHz and 960 MHz, and the second frequency band is approximately Between 1710MHz and 1990MHz. The mobile device of claim 1, further comprising: a second shorting portion, wherein the third conductive frame is further coupled to the grounding component via the second shorting portion, and the antenna structure further comprises the first a three conductive frame and the second short circuit portion. The mobile device of claim 21, wherein a second coupling gap is formed between the open end of the second radiating portion and the third conductive frame, and the second coupling gap is less than 1 mm. The mobile device of claim 1, further comprising: a third shorting portion, wherein the second radiating portion is further coupled to the grounding element via the third shorting portion, and the third shorting portion is adjacent to And parallel to the feed portion.