TW201501403A - Mobile device - Google Patents

Abstract

A mobile device at least includes a ground element, a dielectric substrate, a radiation element, a feeding element, a shorting element, and an exterior decorative plate. The radiation element is disposed on the dielectric substrate. The feeding element is at least partially disposed on the dielectric substrate and is coupled to a signal source. The feeding element is separate from and adjacent to the radiation element. The radiation element is coupled through the shorting element to the ground element. The exterior decorative plate is coupled to the radiation element. A coupled-fed antenna structure is formed by the radiation element, the feeding element, the shorting element, and the exterior decorative plate.

Description

Mobile device

The present invention relates to a mobile device, and more particularly to a mobile device including a coupled-fed Antenna Structure.

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. Others cover short-range wireless communication ranges. For example, Wi-Fi, Bluetooth, and WiMAX (Worldwide Interoperability for Microwave Access) systems use 2.4 GHz, 3.5 GHz, 5.2 GHz, and 5.8 GHz bands for communication.

In recent years, mobile devices often incorporate metal-like parts (such as metal plaques) to enhance the stylish look. However, the presence of these metal-looking components often has a negative impact on the antenna components of the wireless communication, 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 grounding member; a dielectric substrate; a radiating portion disposed on the dielectric substrate; a feeding portion disposed at least partially on the dielectric substrate and coupled to a signal source, wherein the feeding portion is separated from the radiating portion and adjacent to the radiating portion; a shorting portion, wherein the radiating portion is coupled to the grounding element via the shorting portion; and an exterior trim panel coupled To the radiation portion, the radiation portion, the feed portion, the short circuit portion, and the exterior trim panel together form a coupled feed antenna structure.

100, 200, 300, 400‧‧‧ mobile devices

110‧‧‧ Grounding components

120‧‧‧Media substrate

130‧‧‧ Radiation Department

140, 240, 340‧‧ ‧Feeding Department

141, 241, 341 ‧ ‧ the first part of the feeding department

142, 242, 342‧‧ ‧ the second part of the feeding department

143, 243, 343 ‧ ‧ the third part of the feeding department

150, 450‧‧‧ Short circuit

160‧‧‧ appearance panels

165‧‧‧ openings in the exterior panel

170‧‧‧System Board

172‧‧‧Ungrounded area of the system board

190‧‧‧Signal source

410‧‧‧Inductance components

The first surface of the E1‧‧• dielectric substrate

E2‧‧‧ second surface of the dielectric substrate

FB1‧‧‧ first frequency band

FB2‧‧‧second frequency band

G1‧‧‧ 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 plan view showing a mobile device according to an embodiment of the present invention; FIG. 4 is a plan view showing a mobile device according to an embodiment of the present invention; Return loss map of a coupled feed antenna structure of a mobile device according to an embodiment of the invention; and FIG. 6 is a diagram showing antenna efficiency of a coupled feed antenna structure of a mobile device according to an embodiment of the invention Figure.

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, a tablet computer, or a notebook computer. As shown in FIGS. 1A and 1B , the mobile device 100 includes at least a grounding component 110 , a dielectric substrate 120 , a radiating portion 130 , a feeding portion 140 , a shorting portion 150 , an exterior trim 160 , and a signal source . 190. In the preferred embodiment, the grounding element 110, the radiating portion 130, the feed portion 140, the shorting portion 150, and the exterior trim 160 are all made of metal, such as copper, silver, aluminum, or iron. It should be noted that the mobile device 100 may further include other components, such as a processor, a touch panel, a wireless module, a speaker, and a casing (not shown).

The radiation portion 130 is provided on the dielectric substrate 120. The exterior trim 160 is coupled to the radiating portion 130. The exterior panel 160 can be part of one of the housings (not shown) of the mobile device 100. For example, the exterior trim 160 is located at the bottom or top of the outer casing. The exterior panel 160 may be secured to the radiation portion 130 by one or more thimbles, metal springs, or screws (not shown). In some embodiments, the radiating portion 130 is generally rectangular and the trim panel 160 is substantially another rectangle. The length of the exterior trim 160 is greater than the length of the radiating portion 130. The feeding portion 140 is at least partially disposed on the dielectric substrate 120 and coupled to the signal source 190. In addition, the feeding portion 140 is separated from the radiation portion 130 and adjacent to the radiation portion 130. The radiating portion 130 is further coupled to the grounding element 110 via the shorting portion 150. In some embodiments, the shorting portion 150 includes a meandering structure. For example, the structure of the crucible can be substantially an S-shape or an N-shape. The radiating portion 130, the feeding portion 140, the short-circuit portion 150, and the exterior trim 160 are collectively formed into a coupled-fed Antenna Structure.

In some embodiments, the mobile device 100 further includes a system circuit board 170. The system board 170 is separated from the dielectric substrate 120, and the ground element 110 is disposed on the system board 170. In more detail, the dielectric substrate 120 is substantially parallel to the system circuit board 170, and the exterior trim 160 is substantially perpendicular to the dielectric substrate 120 and the system circuit board 170. In some embodiments, system board 170 further has a ground free region 172. The projection of the radiating portion 130 on one of the system boards 170 at least partially overlaps the ungrounded region 172.

In some embodiments, the feeding portion 140 includes a first portion 141, a second portion 142, and a third portion 143. The first portion 141 of the feed portion 140 is disposed on the dielectric substrate 120 and adjacent to the radiation portion 130. The second portion 142 of the feeding portion 140 is coupled between the first portion 141 and the third portion 143 of the feeding portion 140. The third portion 143 of the feed portion 140 is disposed on the system circuit board 170 and coupled to the signal source 190. The first portion 141 and the third portion 143 of the feeding portion 140 may be two metal wires (Metal Traces) disposed on the dielectric substrate 120 and the system circuit board 170, respectively. The second portion 142 of the feed portion 140 can be a thimble or a metal dome and can be substantially perpendicular to the dielectric substrate 120 and the system circuit board 170. The dielectric substrate 120 has a first surface E1 and a second surface E2, and the first surface E1 is opposite to the second surface E2. In more detail, the radiation portion 130 is disposed in the first table. The surface E1 and the first portion 141 of the feeding portion 140 are disposed on the second surface E2. In some embodiments, the first portion 141 of the feed portion 140 is substantially straight. The second portion 142 of the feed portion 140 is coupled to one end of the first portion 141 of the feed portion 140 (L-shaped feed structure).

In some embodiments, the exterior trim 160 further has an opening 165. The opening 165 may be formed substantially in the center of the exterior panel 160 and may be substantially rectangular, circular, or elliptical. The aperture 165 is for receiving a data transmission component (not shown), such as a Universal Serial Bus Connector (USB Connector) or a Mini Universal Serial Bus Connector (Micro-USB Connector). Therefore, the mobile device 100 can exchange data with an external device (for example, a desktop computer or a notebook computer) via the data transmission component. It must be noted that the opening 165 is not an essential structure. In other embodiments, the exterior trim 160 can also be a non-perforated solid metal sheet.

For the mobile device 100 of the present invention, the exterior trim 160 is part of the coupled feed antenna structure, which not only increases the length of the resonant current path corresponding to the low frequency band, but also saves the mobile device. Available design space within 100. Since the exterior trim 160 can be considered as another radiating portion of the coupled feed antenna structure, the exterior trim 160 will not adversely affect its antenna radiation performance. Compared to the prior art, the mobile device 100 of the present invention has at least the multiple advantages of improved appearance, reduced overall size, and good communication quality.

2 is a plan view showing a mobile device 200 according to an embodiment of the present invention. Figure 2 is similar to Figure 1. In the embodiment of Figure 2, the line The feeding portion 240 of the moving device 200 includes a first portion 241, a second portion 242, and a third portion 243. The radiation portion 130 is disposed on the first surface E1 of the dielectric substrate 120, and the first portion 241 of the feeding portion 240 is disposed on the second surface E2 of the dielectric substrate 120. The first portion 241 of the feed portion 240 is substantially straight and the second portion 242 of the feed portion 240 is coupled to the center of the first portion 241 of the feed portion 240 (T-shaped feed structure). The remaining features of the mobile device 200 of FIG. 2 are similar to those of the mobile device 100 of FIG. 1, so that the second embodiment can achieve similar operational effects.

Figure 3 is a plan view showing a mobile device 300 according to an embodiment of the present invention. Figure 3 is similar to Figure 1. In the embodiment of FIG. 3, one of the feeding portions 340 of the mobile device 300 includes a first portion 341, a second portion 342, and a third portion 343. The first portion 341 of the feed portion 340 is substantially straight and the second portion 342 of the feed portion 340 is coupled to one end of the first portion 341 of the feed portion 340 (L-shaped feed structure). It should be noted that the first portion 341 of the radiating portion 130 and the feeding portion 340 are disposed on the first surface E1 of the dielectric substrate 120 to form a Coplanar Coupled-Fed Structure. In some embodiments, one of the coupling gaps G1 between the radiating portion 130 and the first portion 341 of the feed portion 340 must be less than 1 mm or 0.5 mm. The remaining features of the mobile device 300 of FIG. 3 are similar to those of the mobile device 100 of FIG. 1, so that the two embodiments can achieve similar operational effects.

Figure 4 is a plan 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, one short circuit portion 450 of the mobile device 400 is coupled in series with an inductance element 410. In some embodiments, the inductive component 410 is a chip inductor or a chip inductor Variable Inductor. The inductive component 410 can be used to reduce the length of the shorting portion 450 and to adjust Impedance Matching of one of the coupled feed antenna structures of the mobile device 400. 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 diagram showing the Return Loss of the coupled feed 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. 5, the coupled feed antenna structure can cover at least a first frequency band FB1 and a second frequency band FB2 under the standard of 6 dB return loss. 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 2690 MHz. Therefore, the mobile device 100 can operate in the GSM850/900/1800/1900 and LTE700/800/1800/2100/2600 multiple frequency bands.

Figure 6 is a diagram showing an antenna efficiency of the coupled feed 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 Figure 6, the antenna efficiency of the coupled feed antenna structure in the GSM850/900/1800/1900 band is between 55% and 83%, while in the LTE700/800/1800/2100/2600 band. The efficiency of the antenna is between 57% and 83%, which can meet the needs of practical applications.

In some embodiments, the component sizes and component parameters of the present invention are as follows. Please refer to Figures 1A and 1B again. The system board 170 has a length of about 122 mm and a width of about 65 mm. The grounding element 110 has a length of about 110 mm and a width. The degree is about 65mm. The ungrounded region 172 has a length of about 12 mm and a width of about 65 mm. The dielectric substrate 120 is an FR4 (Flame Resistant-4) substrate having a dielectric constant of about 4.3. The dielectric substrate 120 has a length of about 40 mm, a width of about 8 mm, and a thickness of about 0.8 mm. The distance between the dielectric substrate 120 and the system board 170 is approximately 5 mm. The radiation portion 130 has a length of about 40 mm and a width of about 8 mm. The feed portion 140 (including the first portion 141, the second portion 142, and the third portion 143) has a length of about 18 mm and a width of about 1.5 mm. The short-circuit portion 150 has a length of about 17.5 mm and a width of about 0.5 mm. The exterior trim 160 has a length of approximately 65 mm and a width of approximately 5 mm. The opening 165 of the exterior trim 160 has a length of about 10 mm and a width of about 4 mm.

It is to be noted that the component sizes, component parameters, component shapes, and frequency band ranges described above are not intended to be limiting of the present invention. The antenna designer can adjust these settings according to different needs.

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‧‧‧ Grounding components

120‧‧‧Media substrate

130‧‧‧ Radiation Department

140‧‧‧Feeding Department

141‧‧ The first part of the feeding department

142‧‧ The second part of the feeding department

143‧‧The third part of the feeding department

150‧‧‧ Short circuit

160‧‧‧ appearance panels

165‧‧‧ openings in the exterior panel

170‧‧‧System Board

172‧‧‧Ungrounded area of the system board

190‧‧‧Signal source

The first surface of the E1‧‧• dielectric substrate

E2‧‧‧ second surface of the dielectric substrate

Claims (12)

A mobile device includes: a grounding member; a dielectric substrate; a radiating portion disposed on the dielectric substrate; a feeding portion disposed at least partially on the dielectric substrate and coupled to a signal source, wherein the feeding portion Separating from the radiating portion and adjacent to the radiating portion; a shorting portion, wherein the radiating portion is coupled to the grounding member via the shorting portion; and a decorative panel coupled to the radiating portion; wherein The radiating portion, the feed portion, the short circuit portion, and the exterior trim panel together form a coupled feed antenna structure. The mobile device of claim 1, further comprising: a system circuit board separated from the dielectric substrate, wherein the grounding component is disposed on the system circuit board. The mobile device of claim 2, wherein the dielectric substrate is substantially parallel to the system circuit board, and the exterior trim is substantially perpendicular to the dielectric substrate and the system circuit board. The mobile device of claim 2, wherein the system board further has a groundless area, and the projection of the radiating portion on the system board at least partially overlaps the ungrounded area. The mobile device of claim 2, wherein the feeding portion comprises a first portion, a second portion, and a third portion, the first portion The portion is disposed on the dielectric substrate adjacent to the radiation portion, the second portion is coupled between the first portion and the third portion, and the third portion is disposed on the system circuit board And coupled to the signal source. The mobile device of claim 5, wherein the dielectric substrate has a first surface and a second surface, the first surface is opposite to the second surface, and the radiating portion is disposed on the first surface And the first portion of the feeding portion is disposed on the second surface. The mobile device of claim 6, wherein the first portion of the feed portion is substantially a straight strip, and the second portion of the feed portion is coupled to the first portion of the feed portion One of the ends or the center of the first part. The mobile device of claim 5, wherein the dielectric substrate has a first surface, and the first portion of the radiation portion and the feeding portion are disposed on the first surface. The mobile device of claim 1, wherein the exterior panel has an opening, the opening is formed substantially in the center of the exterior panel, and the opening is for receiving a data transmission component. The mobile device of claim 1, wherein the exterior panel is substantially rectangular, and the length of the exterior panel is greater than the length of the radiation portion, wherein the exterior panel is an outer casing of the mobile device One part. The mobile device of claim 1, wherein the short circuit portion is coupled in series with an inductance element. The mobile device of claim 1, wherein the coupled feed antenna structure comprises a first frequency band and a second frequency band, the first frequency band It is between about 700 MHz and 960 MHz, and the second frequency band is between about 1710 MHz and 2690 MHz.