TWI879180B - Mobile device supporting wideband operation - Google Patents

Abstract

A mobile device supporting wideband operations includes a feeding radiation element, a first shorting radiation element, a second shorting radiation element, an extension radiation element, and an auxiliary radiation element. The feeding radiation element has a feeding point. The feeding radiation element is coupled through the first shorting radiation element to a first grounding point. The feeding radiation element is also coupled through the second shorting radiation element to a second grounding point. The extension radiation element is coupled to a first connection point on the first shorting radiation element. The auxiliary radiation element is coupled to a second connection point on the first shorting radiation element. An antenna structure is formed the feeding radiation element, the first shorting radiation element, the second shorting radiation element, the extension radiation element, and the auxiliary radiation element.

Description

Mobile devices that support broadband operation

The present invention relates to a mobile device, and more particularly to a mobile device capable of supporting broadband operation.

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, 850 MHz, 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, 5.2GHz and 5.8GHz frequency bands for communication.

Antennas are essential components in the field of wireless communications. If the operational bandwidth of an antenna used to receive or transmit signals is too narrow, it will easily cause the communication quality of mobile devices to deteriorate. Therefore, how to design a small-sized, wide-bandwidth antenna structure is an important issue for designers.

In a preferred embodiment, the present invention provides a mobile device supporting broadband operation, comprising: a feed radiation part having a feed point; a first short-circuit radiation part, wherein the feed radiation part is coupled to a first ground point via the first short-circuit radiation part; a second short-circuit radiation part, wherein the feed radiation part is further coupled to a ground point via the second short-circuit radiation part. a second grounding point; an extended radiation portion coupled to a first connection point on the first short-circuit radiation portion; and an auxiliary radiation portion coupled to a second connection point on the first short-circuit radiation portion; wherein the feed radiation portion, the first short-circuit radiation portion, the second short-circuit radiation portion, the extended radiation portion, and the auxiliary radiation portion together form an antenna structure.

In some embodiments, the first short-circuit radiating portion presents a longer L-shape, and the second short-circuit radiating portion presents a shorter L-shape.

In some embodiments, the extended radiating portion is in a T-shape.

In some embodiments, the mobile device further includes: a speaker element including a non-conductive housing, wherein the antenna structure is disposed on the non-conductive housing.

In some embodiments, the non-conductive housing includes a top portion and a side wall portion, the extended radiation portion is located on the top portion, and the feed radiation portion, the first short-circuit radiation portion, the second short-circuit radiation portion, and the auxiliary radiation portion are all located on the side wall portion.

In some embodiments, the mobile device further includes: a keyboard frame made of a non-conductive material; a base shell made of a metal material; and a battery element adjacent to the feed point; wherein the speaker element and the battery element are both disposed between the keyboard frame and the base shell.

In some embodiments, the antenna structure covers a first frequency band, a second frequency band, and a third frequency band, the first frequency band is between 2400 MHz and 2500 MHz, the second frequency band is between 5150 MHz and 5850 MHz, and the third frequency band is between 5925 and 7125 MHz.

In some embodiments, the length of the feed radiation portion is approximately equal to 0.25 times the wavelength of the third frequency band.

In some embodiments, the total length of the feed radiation portion and the first short-circuit radiation portion is substantially equal to 0.5 times the wavelength of the first frequency band.

In some embodiments, the total length of the feed radiation portion and the second short-circuit radiation portion is between 0.25 and 0.5 times the wavelength of the second frequency band.

In order to make the purpose, features and advantages of the present invention more clearly understood, specific embodiments of the present invention are specifically listed below and described in detail with reference to the accompanying drawings.

Certain terms are used in the specification and patent application to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and patent application do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criterion for distinction. The words "include" and "including" mentioned throughout the specification and patent application are open terms and 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. In addition, the word "coupled" in this specification includes any direct and indirect electrical connection means. Therefore, if a first device is described herein as being coupled to a second device, it means that the first device may be directly electrically connected to the second device, or may be indirectly electrically connected to the second device via other devices or connection means.

The following disclosure provides many different embodiments or examples for implementing different features of the present invention. The following disclosure describes specific examples of various components and their arrangements to simplify the description. Of course, these specific examples are not intended to be limiting. For example, if the present disclosure describes a first feature formed on or above a second feature, it means that it may include an embodiment in which the first feature and the second feature are in direct contact, and may also include an embodiment in which an additional feature is formed between the first feature and the second feature, so that the first feature and the second feature may not be in direct contact. In addition, the same reference symbols and/or marks may be reused in different examples of the following disclosure. These repetitions are for the purpose of simplification and clarity, and are not intended to limit the specific relationship between the different embodiments and/or structures discussed.

In addition, spatially related terms such as "below," "below," "lower," "above," "higher," and similar terms are used to facilitate description of the relationship between one element or feature and another element or features in the diagram. In addition to the orientation shown in the drawings, these spatially related terms are intended to include different orientations of the device in use or operation. The device may be rotated to different orientations (rotated 90 degrees or other orientations), and the spatially related terms used herein may be interpreted accordingly.

FIG. 1 is a plan view showing a mobile device 100 according to an embodiment of the present invention. For example, the mobile device 100 may be a smart phone, a tablet computer, or a notebook computer. In the embodiment of FIG. 1 , the mobile device 100 includes a feeding radiation element 110, a first short-circuit radiation element 120, a second short-circuit radiation element 130, an extension radiation element 140, and an auxiliary radiation element 150, wherein the feeding radiation element 110, the first short-circuit radiation element 120, the second short-circuit radiation element 130, the extension radiation element 140, and the auxiliary radiation element 150 can all be made of metal materials, such as copper, silver, aluminum, iron, or alloys thereof. It should be understood that, although not shown in FIG. 1 , the mobile device 100 may further include other components, such as a processor, a touch control panel, a power supply module, or (and) a housing.

The feeding radiation part 110 may be substantially in the shape of a straight bar. Specifically, the feeding radiation part 110 has a first end 111 and a second end 112, wherein a feeding point FP is located at the first end 111 of the feeding radiation part 110. The feeding point FP may be further coupled to a signal source 199. For example, the signal source 199 may be a radio frequency (RF) module.

The first short-circuit radiation portion 120 may be substantially in the shape of a relatively long L. Specifically, the first short-circuit radiation portion 120 has a first end 121 and a second end 122, wherein a first grounding point GP1 is located at the first end 121 of the first short-circuit radiation portion 120, and the second end 122 of the first short-circuit radiation portion 120 is coupled to the second end 112 of the feed radiation portion 110. The first grounding point GP1 may be further coupled to a ground voltage VSS. That is, the feed radiation portion 110 may be coupled to the first grounding point GP1 (or the ground voltage VSS) via the first short-circuit radiation portion 120.

The second short-circuit radiation portion 130 may generally present a shorter L-shape (compared to the first short-circuit radiation portion 120). In detail, the second short-circuit radiation portion 130 has a first end 131 and a second end 132, wherein a second ground point GP2 is located at the first end 131 of the second short-circuit radiation portion 130, and the second end 132 of the second short-circuit radiation portion 130 is coupled to the second end 112 of the feed radiation portion 110. The second ground point GP2 may be further coupled to the ground potential VSS. That is, the feed radiation portion 110 may be further coupled to the second ground point GP2 (or the ground potential VSS) via the second short-circuit radiation portion 130. In some embodiments, the combination of the feed radiation portion 110 , the first short-circuit radiation portion 120 , and the second short-circuit radiation portion 130 may substantially present an M shape, but is not limited thereto.

The extended radiation portion 140 may be substantially T-shaped. Specifically, the extended radiation portion 140 has a first end 141, a second end 142, and a third end 143, wherein the first end 141 of the extended radiation portion 140 is coupled to a first connection point CP1 on the first short-circuit radiation portion 120. The second end 142 and the third end 143 of the extended radiation portion 140 are two open ends, which may be substantially extended in opposite and mutually distant directions. In some embodiments, the extended radiating portion 140 includes a first portion 144 and a second portion 145 coupled to each other, wherein the first portion 144 is adjacent to the second end 142 of the extended radiating portion 140, and the second portion 145 is adjacent to the third end 143 of the extended radiating portion 140. For example, the first portion 144 of the extended radiating portion 140 may be substantially L-shaped, and the second portion 145 of the extended radiating portion 140 may be substantially in an inverted L-shape, but the present invention is not limited thereto. It should be noted that the term "adjacent" or "adjacent" in this specification may refer to a situation where the distance between two corresponding elements is less than a predetermined distance (e.g., 10 mm or shorter), and may also include a situation where two corresponding elements are in direct contact with each other (i.e., the aforementioned distance is shortened to 0).

The auxiliary radiation portion 150 may be substantially in the shape of another straight strip, and may be substantially parallel to the feed radiation portion 110. Specifically, the auxiliary radiation portion 150 has a first end 151 and a second end 152, wherein the first end 151 of the auxiliary radiation portion 150 is coupled to a second connection point CP2 on the first short-circuit radiation portion 120, and the second end 152 of the auxiliary radiation portion 150 is an open end. The second end 152 of the auxiliary radiation portion 150 may also extend in a direction away from the extended radiation portion 140. For example, the second connection point CP2 may be substantially aligned with the aforementioned first connection point CP1, but is not limited thereto.

In a preferred embodiment, the feed radiation part 110, the first short-circuit radiation part 120, the second short-circuit radiation part 130, the extended radiation part 140, and the auxiliary radiation part 150 can together form an antenna structure (Antenna Structure) of the mobile device 100. For example, the aforementioned antenna structure can be a planar antenna structure. However, the present invention is not limited to this. In other embodiments, the aforementioned antenna structure can also be bent about 90 degrees along a dividing line LN to achieve a three-dimensional antenna structure. At this time, the extended radiation portion 140 may be located on a first plane, and the feed radiation portion 110, the first short-circuit radiation portion 120, the second short-circuit radiation portion 130, and the auxiliary radiation portion 150 may all be located on a second plane, wherein the second plane may be substantially perpendicular to the first plane.

In some embodiments, the antenna structure of the mobile device 100 may cover a first frequency band, a second frequency band, and a third frequency band. For example, the first frequency band may be between 2400MHz and 2500MHz, the second frequency band may be between 5150MHz and 5850MHz, and the third frequency band may be between 5925MHz and 7125MHz. Therefore, the mobile device 100 will at least support WLAN (Wireless Local Area Network), Wi-Fi 6E, and Wi-Fi 7 broadband operations.

In some embodiments, the operating principle of the antenna structure of the mobile device 100 can be described as follows. The feed radiation part 110 and the first short-circuit radiation part 120 can be jointly excited to generate the aforementioned first frequency band. The feed radiation part 110 and the second short-circuit radiation part 130 can be jointly excited to generate the aforementioned second frequency band. The feed radiation part 110 itself can be excited to generate the aforementioned third frequency band alone. In addition, the extended radiation part 140 and the auxiliary radiation part 150 can be used to fine-tune the impedance matching (Impedance Matching) of the aforementioned first frequency band, thereby increasing its operational bandwidth (Operational Bandwidth).

In some embodiments, the dimensions of the components of the mobile device 100 may be as follows. The length L1 of the feed radiating portion 110 may be approximately equal to 0.25 times the wavelength (λ/4) of the third frequency band of the antenna structure of the mobile device 100. The total length L2 of the feed radiating portion 110 and the first short-circuit radiating portion 120 may be approximately equal to 0.5 times the wavelength (λ/2) of the first frequency band of the antenna structure of the mobile device 100. The total length L3 of the feed radiating portion 110 and the second short-circuit radiating portion 130 may be between 0.25 times and 0.5 times the wavelength (λ/4 to λ/2) of the second frequency band of the antenna structure of the mobile device 100, for example, approximately 0.3 times the wavelength (0.3λ) or approximately 0.4 times the wavelength (0.4λ). The length L4 of the first portion 144 of the extended radiation portion 140 may be approximately equal to 0.25 times the wavelength (λ/4) of the first frequency band of the antenna structure of the mobile device 100. The length L5 of the second portion 145 of the extended radiation portion 140 may be approximately equal to 0.25 times the wavelength (λ/4) of the first frequency band of the antenna structure of the mobile device 100. The length L6 of the auxiliary radiation portion 150 may be between 3 mm and 4 mm. The distance D1 between the auxiliary radiation portion 150 and the feed radiation portion 110 may be less than 0.25 times the wavelength (λ/4) of the first frequency band of the antenna structure of the mobile device 100. For example, the aforementioned distance D1 may be between 7 mm and 10 mm. The above size range is obtained based on multiple experimental results, which helps to optimize the operating bandwidth and impedance matching of the antenna structure of the mobile device 100.

The following will introduce different configurations and detailed structural features of the mobile device 100. It must be understood that these drawings and descriptions are only examples and are not intended to limit the present invention.

FIG. 2 is a cross-sectional view of a mobile device 200 according to an embodiment of the present invention. FIG. 2 is similar to FIG. 1. In the embodiment of FIG. 2, the mobile device 200 is a notebook computer, and further includes: a speaker element 260, a keyboard frame 270, a base housing 280, and a battery element 290, wherein the keyboard frame 270 can be made of a non-conductive material, and the base housing 280 can be made of a metal material. For example, the base housing 280 can be regarded as a system ground plane of the mobile device 200, which can be used to provide the aforementioned ground potential VSS. It must be understood that the aforementioned keyboard frame 270 and base housing 280 are respectively equivalent to the so-called "C-part" and "D-part" in the field of notebook computers.

Generally speaking, the speaker element 260 includes a non-conductive housing 264, wherein an antenna structure of the mobile device 200 may be disposed on the non-conductive housing 264. Specifically, the non-conductive housing 264 may include a top portion 265 and a sidewall portion 266, wherein the extended radiation portion 140 may be located on the top portion 265 of the non-conductive housing 264, and the feed radiation portion 110, the first short-circuit radiation portion 120, the second short-circuit radiation portion 130, and the auxiliary radiation portion 150 may all be located on the sidewall portion 266 of the non-conductive housing 264. In addition, the battery element 290 may be located close to the feed point FP of the antenna structure of the mobile device 200. For example, the distance D2 between the battery element 290 and the feed point FP may be between 1 mm and 2 mm to prevent the battery element 290 from negatively affecting the radiation performance of the antenna structure. It should be noted that the speaker element 260, the battery element 290, and the antenna structure of the mobile device 200 may be disposed between the keyboard frame 270 and the base housing 280.

According to actual measurement results, since the antenna structure of the mobile device 200 is properly integrated with its speaker element 260, the mobile device 200 can not only maintain good communication quality, but also significantly reduce the size of the overall antenna. On the other hand, the feed point FP of the antenna structure of the mobile device 200 is between the speaker element 260 and the battery element 290 and far away from the keyboard frame 270. Under this design, if an arrow 299 above the keyboard frame 270 is used as a detection direction, a specific absorption rate (SAR) detected by the mobile device 200 will be more easily able to meet legal regulations. The remaining features of the mobile device 200 in FIG. 2 are similar to those of the mobile device 100 in FIG. 1 , so both embodiments can achieve similar operating effects.

FIG. 3 is a diagram showing the radiation gain of the antenna structure of the mobile device 200 according to an embodiment of the present invention, wherein the horizontal axis represents the operating frequency (MHz) and the vertical axis represents the radiation gain (dBi). According to the measurement results of FIG. 3, the radiation efficiency of the antenna structure of the mobile device 200 in the aforementioned first frequency band and second frequency band can reach at least -5dB, which can meet the actual application requirements of general mobile communication devices.

The present invention provides a novel mobile device and antenna structure thereof. Compared with the traditional design, the present invention has at least the advantages of small size, wide bandwidth, low manufacturing cost, and improved specific absorption rate, so it is very suitable for application in various communication devices.

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 of the present invention is not limited to the states shown in Figures 1-3. The present invention may include only one or more features of any one or more embodiments of Figures 1-3. In other words, not all the features shown in the diagrams need to be implemented in the mobile device of the present invention at the same time.

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 mark and distinguish two different components with the same name.

Although the present invention is disclosed as above with the 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 subject to the scope defined by the attached patent application.

100,200: mobile device 110: feed radiation part 111: first end of feed radiation part 112: second end of feed radiation part 120: first short-circuit radiation part 121: first end of first short-circuit radiation part 122: second end of first short-circuit radiation part 130: second short-circuit radiation part 131: first end of second short-circuit radiation part 132: second end of second short-circuit radiation part 140: extended radiation part 141: first end of extended radiation part 142: second end of extended radiation part 143: third end of extended radiation part 144: first part of extended radiation part 145: The second part of the extended radiation part 150: The auxiliary radiation part 151: The first end of the auxiliary radiation part 152: The second end of the auxiliary radiation part 199: Signal source 260: Speaker element 264: Non-conductive housing 265: The top part of the non-conductive housing 266: The side wall part of the non-conductive housing 270: Keyboard frame 280: Base housing 290: Battery element 299: Arrow CP1: First connection point CP2: Second connection point D1, D2: Distance FP: Feed point GP1: First ground point GP2: Second ground point L1, L2, L3, L4, L5, L6: length LN: dividing line VSS: ground potential

FIG. 1 is a plan view of a mobile device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a mobile device according to an embodiment of the present invention. FIG. 3 is a radiation gain diagram of an antenna structure of a mobile device according to an embodiment of the present invention.

100: Mobile devices

110: Feed Radiation Department

111: The first end of the feed radiation unit

112: Feed the second end of the radiation unit

120: First short-circuit radiation unit

121: The first end of the first short-circuit radiation unit

122: The second end of the first short-circuit radiation unit

130: Second short-circuit radiation unit

131: The first end of the second short-circuit radiation unit

132: The second end of the second short-circuit radiation unit

140: Extended radiation section

141: The first end of the extended radiation portion

142: The second end of the extended radiation portion

143: The third end of the extended radiation section

144: The first part of the extended radiation section

145: The second part of the extended radiation section

150: Auxiliary Radiation Department

151: The first end of the auxiliary radiation unit

152: The second end of the auxiliary radiation unit

199:Signal source

CP1: First connection point

CP2: Second connection point

D1: Spacing

FP: Feed Point

GP1: First grounding point

GP2: Second grounding point

L1,L2,L3,L4,L5,L6: Length

LN: dividing line

VSS: ground potential

Claims (8)

A mobile device supporting broadband operation, comprising: a feed radiation portion having a feed point; a first short-circuit radiation portion, wherein the feed radiation portion is coupled to a first ground point via the first short-circuit radiation portion; a second short-circuit radiation portion, wherein the feed radiation portion is further coupled to a second ground point via the second short-circuit radiation portion; an extended radiation portion coupled to a first connection point on the first short-circuit radiation portion; and an auxiliary radiation portion coupled to a second connection point on the first short-circuit radiation portion; The feed radiation part, the first short-circuit radiation part, the second short-circuit radiation part, the extended radiation part, and the auxiliary radiation part together form an antenna structure; The antenna structure covers a first frequency band, a second frequency band, and a third frequency band, the first frequency band is between 2400MHz and 2500MHz, the second frequency band is between 5150MHz and 5850MHz, and the third frequency band is between 5925 and 7125MHz; The total length of the feed radiation part and the second short-circuit radiation part is between 0.25 times and 0.5 times the wavelength of the second frequency band. A mobile device as claimed in claim 1, wherein the first short-circuit radiating portion is in a longer L-shape, and the second short-circuit radiating portion is in a shorter L-shape. A mobile device as claimed in claim 1, wherein the extended radiating portion is in a T-shape. The mobile device of claim 1 further comprises: A speaker element comprising a non-conductive housing, wherein the antenna structure is disposed on the non-conductive housing. A mobile device as claimed in claim 4, wherein the non-conductive outer shell includes a top portion and a side wall portion, the extended radiation portion is located on the top portion, and the feed radiation portion, the first short-circuit radiation portion, the second short-circuit radiation portion, and the auxiliary radiation portion are all located on the side wall portion. The mobile device of claim 4 further comprises: a keyboard frame made of a non-conductive material; a base housing made of a metal material; and a battery element adjacent to the feed point; wherein the speaker element and the battery element are both disposed between the keyboard frame and the base housing. A mobile device as claimed in claim 1, wherein the length of the feed radiation portion is approximately equal to 0.25 times the wavelength of the third frequency band. A mobile device as claimed in claim 1, wherein the total length of the feed radiation portion and the first short-circuit radiation portion is approximately equal to 0.5 times the wavelength of the first frequency band.

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