Antenna structure

Abstract

Provided is an antenna structure. The antenna structure comprises a feed-in radiation part, a connection radiation part, a first radiation part, a second radiation part, a first short-circuit radiation part, a second short-circuit radiation part and a carrier element, the feed-in radiation part is provided with a feed-in point; the connection radiation part is coupled to the feed-in radiation part; the first radiation part is coupled to the connection radiation part; the second radiation portion is coupled to the connection radiation portion, wherein the second radiation portion and the first radiation portion can extend in substantially opposite directions. The feed-in radiation part and the connection radiation part can be coupled to a first grounding point through the first short-circuit radiation part; the second short-circuit radiation part is adjacent to the second radiation part. The connection radiation part and the first radiation part can be coupled to a second grounding point through the second short-circuit radiation part. The antenna has the advantages of being small in size, wide in frequency band, good in communication quality, capable of being combined with deformable mobile devices with different operation modes and the like, and therefore the antenna is very suitable for being applied to various communication devices.

Description

Technical Field

[0001] The present invention relates to an antenna structure, and in particular to a wideband antenna structure. Background Art

[0002] With the development of mobile communication technology, mobile devices have become increasingly 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-distance wireless communication ranges, such as mobile phones using 2G, 3G, LTE (Long Term Evolution) systems and the 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz and 2500MHz frequency bands used for communication, while some cover short-distance wireless communication ranges, such as Wi-Fi, Bluetooth systems using 2.4GHz, 5.2GHz and 5.8GHz frequency bands for communication.

[0003] Antennas are indispensable components in the field of wireless communications. If the operational bandwidth of an antenna used to receive or transmit signals is too narrow, it is easy to cause the communication quality of the mobile device to deteriorate. Therefore, how to design a small-sized, wide-bandwidth antenna structure is an important issue for designers.

[0004] Therefore, it is necessary to provide an antenna structure to solve the above problems. Summary of the invention

[0005] In a preferred embodiment, the present invention proposes an antenna structure, including: a feed radiating portion having a feed point; a connecting radiating portion coupled to the feed radiating portion; a first radiating portion coupled to the connecting radiating portion; a second radiating portion coupled to the connecting radiating portion, wherein the second radiating portion and the first radiating portion extend substantially in opposite directions; a first short-circuit radiating portion, wherein the feed radiating portion and the connecting radiating portion are both coupled to a first grounding point via the first short-circuit radiating portion; a second short-circuit radiating portion adjacent to the second radiating portion, wherein the connecting radiating portion and the first radiating portion are both coupled to a second grounding point via the second short-circuit radiating portion; and a carrier element, wherein the feed radiating portion, the connecting radiating portion, the first radiating portion, the second radiating portion, the first short-circuit radiating portion, and the second short-circuit radiating portion are all distributed on the carrier element.

[0006] In some embodiments, the carrier element is implemented by a non-conductive support element, a speaker element, or a printed circuit board.

[0007] In some embodiments, the carrier element is in the form of a rectangular parallelepiped.

[0008] In some embodiments, the carrier element has a first surface, a second surface, and a third surface, the third surface and the first surface are opposite to each other, and the second surface is between the first surface and the third surface.

[0009] In some embodiments, the feed point and the first ground point are disposed on the same surface of the carrier element.

[0010] In some embodiments, the second grounding point is disposed on another surface of the carrier element.

[0011] In some embodiments, the feed radiation portion, the second radiation portion, and the first short-circuit radiation portion are all disposed on the first surface of the carrier element, the first radiation portion is disposed on the second surface of the carrier element, the connecting radiation portion extends from the first surface of the carrier element to the second surface, and the second short-circuit radiation portion extends from the second surface of the carrier element to the third surface.

[0012] In some embodiments, a coupling gap is formed between the second short-circuit radiation portion and the second radiation portion, and a width of the coupling gap is greater than 0 mm and less than or equal to 3 mm.

[0013] In some embodiments, the feeding radiation portion and the connecting radiation portion are both substantially arranged on a dividing line.

[0014] In some embodiments, the first radiating portion and the first short-circuit radiating portion are both located at the same side of the separation line, and the second radiating portion and the second short-circuit radiating portion are both located at the other side of the separation line.

[0015] In some embodiments, the antenna structure covers a first frequency band, a second frequency band, and a third frequency band.

[0016] In some embodiments, the first frequency band is between 2400 MHz and 2500 MHz, the second frequency band is between 5000 MHz and 6000 MHz, and the third frequency band is between 6000 MHz and 7800 MHz.

[0017] In some embodiments, a total length of the first short-circuit radiation portion, the connecting radiation portion, and the first radiation portion is substantially equal to 0.25 times the wavelength of the first frequency band.

[0018] In some embodiments, the total length of the feeding radiation portion, the connecting radiation portion, and the second radiation portion is substantially equal to 0.25 times the wavelength of the second frequency band.

[0019] In some embodiments, the length of the second short-circuit radiating portion is substantially equal to 0.25 times the wavelength of the first frequency band.

[0020] In some embodiments, the antenna structure further covers a first auxiliary frequency band and a second auxiliary frequency band.

[0021] In some embodiments, the first auxiliary frequency band is between 2300 MHz and 2450 MHz, and the second auxiliary frequency band is between 2450 MHz and 2600 MHz.

[0022] In some embodiments, a total length of the second short-circuit radiating portion and the first radiating portion is substantially equal to 0.25 times the wavelength of the first auxiliary frequency band.

[0023] In some embodiments, the total length of the feeding radiation portion, the connecting radiation portion, and the first radiation portion is substantially equal to 0.25 times the wavelength of the second auxiliary frequency band.

[0024] In some embodiments, the antenna structure is applied to a transformable mobile device, and the transformable mobile device selectively operates in a notebook mode or a tablet mode.

[0025] The present invention proposes a novel antenna structure. Compared with the conventional design, the present invention has at least the advantages of small size, wide bandwidth, good communication quality, and the ability to be combined with deformable mobile devices with different operation modes, so it is very suitable for application in various communication devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A plan view of an antenna structure according to an embodiment of the present invention is shown.

[0027] Figure 2 A three-dimensional diagram showing an antenna structure according to an embodiment of the present invention.

[0028] Figure 3 A perspective view showing a transformable mobile device operating in a notebook mode according to an embodiment of the present invention.

[0029] Figure 4 A three-dimensional diagram showing a transformable mobile device according to an embodiment of the present invention operating in a tablet mode.

[0030] Figure 5 A graph showing the return loss of the antenna structure when the transformable mobile device according to an embodiment of the present invention operates in the notebook mode.

[0031] Figure 6 A graph showing the return loss of the antenna structure when the transformable mobile device according to an embodiment of the present invention operates in a tablet mode.

[0032] Figure 7 A top view of an antenna structure according to an embodiment of the present invention is shown.

[0033] Main component symbols:

[0034] 100, 700 antenna structure

[0035] 110 Feeding radiation part

[0036] 111 Feeding the first end of the radiation part

[0037] 112 Feed the second end of the radiation part

[0038] 120 Connect the radiating part

[0039] 121 Connect the first end of the radiating part

[0040] 12 Connect the second end of the radiator

[0041] 130 First Radiation

[0042] 131 first end of the first radiation portion

[0043] 132 The second end of the first radiation portion

[0044] 140 Second Radiation

[0045] 141 The first end of the second radiation portion

[0046] 142 The second end of the second radiation portion

[0047] 150 First short-circuit radiation part

[0048] 151 The first end of the first short-circuit radiation portion

[0049] 152 The second end of the first short-circuit radiation portion

[0050] 160, 760 Second short-circuit radiation part

[0051] 161, 761 First end of the second short-circuit radiation portion

[0052] 162, 762 second end of the second short-circuit radiation portion

[0053] 170, 770 carrier element

[0054] 190 Signal Source

[0055] 400 Notebook Computer

[0056] 410 Upper cover shell

[0057] 420 Display frame

[0058] 430 Keyboard frame

[0059] 440 Base Shell

[0060] 450 Shaft Components

[0061] CP connection point

[0062] E1 First Surface

[0063] E2 Second Surface

[0064] E3 Third Surface

[0065] FA1 First auxiliary frequency band

[0066] FA2 Second auxiliary frequency band

[0067] FB1 First frequency band

[0068] FB2 Second frequency band

[0069] FB3 Third frequency band

[0070] FP Feed Point

[0071] GC1 Coupling Gap

[0072] GP1 First grounding point

[0073] GP2 Second grounding point

[0074] L1, L2, L3, L4, L5, L6 Length

[0075] LC Divider

[0076] VSS Ground potential DETAILED DESCRIPTION

[0077] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are given below and described in detail with reference to the accompanying drawings.

[0078] Certain words are used in the specification and claims to refer to specific components. It should be understood by those skilled in the art that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. The words "including" and "comprising" mentioned throughout the specification and claims are open-ended 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 and achieve the basic technical effect within a certain error range. In addition, the word "coupled" in this specification includes any direct and indirect electrical connection means. Therefore, if the text describes a first device coupled to a second device, it means that the first device can be directly electrically connected to the second device, or indirectly electrically connected to the second device via other devices or connection means.

[0079] The following disclosure provides many different embodiments or examples to implement the 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 this specification 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 in the following specification. 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.

[0080] In addition, spatially relative terms such as "below," "beneath," "lower," "above," "upper," and the like are used to facilitate describing the relationship of one element or feature to another element or feature in the drawings. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings. The device may be oriented in different orientations (rotated 90 degrees or at other orientations), and the spatially relative terms used herein should be interpreted accordingly.

[0081] Figure 1 A plan view of an antenna structure 100 according to an embodiment of the present invention is shown. Figure 2 A three-dimensional diagram of an antenna structure 100 according to an embodiment of the present invention is shown. Figure 1 , Figure 2The antenna structure 100 can be applied to a mobile device, such as a smart phone, a tablet computer, or a notebook computer. Figure 1 , Figure 2 In the embodiment of the present invention, the antenna structure 100 includes: a feeding radiation element 110, a connection radiation element 120, a first radiation element 130, a second radiation element 140, a first short-circuit radiation element 150, a second short-circuit radiation element 160, and a carrier element 170, wherein the feeding radiation element 110, the connection radiation element 120, the first radiation element 130, the second radiation element 140, the first short-circuit radiation element 150, and the second short-circuit radiation element 160 can all be made of metal materials, such as copper, silver, aluminum, iron, or alloys thereof.

[0082] The feeding radiation portion 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 portion 110. The feeding point FP may also be coupled to a signal source 190. For example, the signal source 190 may be a radio frequency (RF) module, which may be used to excite the antenna structure 100. In some embodiments, the feeding radiation portion 110 may be substantially in the shape of a straight strip, but is not limited thereto.

[0083] The connecting radiation portion 120 has a first end 121 and a second end 122, wherein the first end 121 of the connecting radiation portion 120 is coupled to the second end 112 of the feeding radiation portion 110. In some embodiments, the feeding radiation portion 110 and the connecting radiation portion 120 can be arranged substantially on the same dividing line LC, wherein the first radiation portion 130 and the first short-circuit radiation portion 150 can be located on the same side of the dividing line LC (e.g., the right side), and the second radiation portion 140 and the second short-circuit radiation portion 160 can be located on the other side of the dividing line LC (e.g., the left side). It should be understood that the dividing line LC can be a straight line on a plane, but it can also be appropriately bent according to different requirements. In some embodiments, the connecting radiation portion 120 can be substantially in another straight strip shape, but is not limited thereto.

[0084] The first radiating portion 130 has a first end 131 and a second end 132, wherein the first end 131 of the first radiating portion 130 is coupled to the second end 122 of the connecting radiating portion 120, and the second end 132 of the first radiating portion 130 is an open end. In some embodiments, the first radiating portion 130 may be substantially in the shape of a long straight strip, which may be substantially perpendicular to the connecting radiating portion 120, but is not limited thereto.

[0085] The second radiating portion 140 has a first end 141 and a second end 142, wherein the first end 141 of the second radiating portion 140 is coupled to a connection point CP on the connecting radiating portion 120, and the second end 142 of the second radiating portion 140 is an open end. For example, the second end 142 of the second radiating portion 140 and the second end 132 of the first radiating portion 130 may extend in substantially opposite directions and away from each other. In addition, the connection point CP may be adjacent to the second end 122 of the connecting radiating portion 120. In some embodiments, the second radiating portion 140 may be substantially in the shape of a short straight bar, which may be substantially perpendicular to the connecting radiating portion 120 and substantially parallel to the first radiating portion 130, but is not limited thereto. It should be noted that the term "close to" or "adjacent" in this specification may refer to a distance between two corresponding elements being less than a critical distance (e.g., 10 mm or less), but generally does not include a situation where the two corresponding elements are in direct contact with each other (i.e., the aforementioned distance is shortened to 0).

[0086] The first short-circuit radiating portion 150 has a first end 151 and a second end 152, wherein a first grounding point GP1 is located at the first end 151 of the first short-circuit radiating portion 150, and the second end 152 of the first short-circuit radiating portion 150 is coupled to the second end 112 of the feeding radiating portion 110 and the first end 121 of the connecting radiating portion 120. That is, both the feeding radiating portion 110 and the connecting radiating portion 120 can be coupled to the first grounding point GP1 via the first short-circuit radiating portion 150. The first grounding point GP1 can also be coupled to a ground voltage VSS. For example, the ground voltage VSS can be provided by a system ground plane of the antenna structure 100 (not shown). In some embodiments, the first short-circuit radiating portion 150 can be substantially in a shorter L shape, but is not limited thereto.

[0087] The second short-circuit radiation portion 160 has a first end 161 and a second end 162, wherein a second grounding point GP2 is located at the first end 161 of the second short-circuit radiation portion 160, and the second end 162 of the second short-circuit radiation portion 160 is coupled to the second end 122 of the connection radiation portion 120 and the first end 131 of the first radiation portion 130. That is, both the connection radiation portion 120 and the first radiation portion 130 can be coupled to the second grounding point GP2 via the second short-circuit radiation portion 160. The second grounding point GP2 can also be coupled to the ground potential VSS, wherein the second grounding point GP2 can be completely different from the aforementioned first grounding point GP1. In addition, the second short-circuit radiation portion 160 can be adjacent to the second radiation portion 140, wherein a coupling gap GC1 can be formed between the second short-circuit radiation portion 160 and the second radiation portion 140. In some embodiments, the second short-circuit radiation portion 160 can be substantially in a long L-shape, but is not limited thereto.

[0088] For example, the carrier element 170 may be implemented by a nonconductive support element or a speaker element. The feed radiation portion 110, the connection radiation portion 120, the first radiation portion 130, the second radiation portion 140, the first short-circuit radiation portion 150, and the second short-circuit radiation portion 160 may all be distributed on the carrier element 170. In detail, the carrier element 170 has a first surface E1, a second surface E2, and a third surface E3, wherein the third surface E3 and the first surface E1 are opposite to each other, and the second surface E2 is between the first surface E1 and the third surface E3. In some embodiments, both the feed point FP and the first ground point GP1 may be located on the same surface of the carrier element 170 (e.g., the first surface E1), and the second ground point GP2 may be located on another surface of the carrier element 170. The feed radiation portion 110, the second radiation portion 140, and the first short-circuit radiation portion 150 may all be disposed on the first surface E1 of the carrier element 170. The first radiation portion 130 may be disposed on the second surface E2 of the carrier element 170. The connection radiation portion 120 may extend from the first surface E1 of the carrier element 170 to the second surface E2. The second short-circuit radiation portion 160 may extend from the second surface E2 of the carrier element 170 to the third surface E3. In some embodiments, the carrier element 170 may be substantially in the form of a rectangular parallelepiped. It should be noted that the present invention is not limited thereto. In other embodiments, the feed radiation portion 110, the connection radiation portion 120, the first radiation portion 130, the second radiation portion 140, the first short-circuit radiation portion 150, and the second short-circuit radiation portion 160 may also be located on different surfaces of the carrier element 170, which may be adjusted according to various design requirements. In other embodiments, at least a portion of the feeding radiation portion 110 and at least a portion of the first short-circuit radiation portion 150 may be located on the same surface of the carrier element 170 (e.g., the first surface E1), and at least a portion of the second short-circuit radiation portion 160 may be located on another surface of the carrier element 170 (i.e., a surface other than the first surface E1).

[0089] It should be understood that although the antenna structure 100 is a three-dimensional antenna structure, the present invention is not limited thereto. In other embodiments, the antenna structure 100 may also be changed to a planar antenna structure (eg, Figure 1 In addition, if the carrier element 170 is a speaker element, the aforementioned radiation parts can be distributed on a non-conductive shell of the speaker element, thereby miniaturizing the overall size of the antenna structure 100.

[0090] Figure 3A three-dimensional diagram showing a convertible mobile device 400 according to an embodiment of the present invention operating in a notebook mode is shown. Figure 4 A three-dimensional diagram showing a transformable mobile device 400 according to an embodiment of the present invention operating in tablet mode. Figure 3 , Figure 4 .exist Figure 3 , Figure 4 In the embodiment of the present invention, the deformable mobile device 400 includes an upper cover housing 410, a display frame 420, a keyboard frame 430, a base housing 440, and a hinge element 450, wherein the keyboard frame 430 and the base housing 440 can be made of metal. It should be understood that the upper cover housing 410, the display frame 420, the keyboard frame 430, and the base housing 440 can be respectively equivalent to the so-called "A part", "B part", "C part", and "D part" in the field of notebook computers. By using the hinge element 450, the deformable mobile device 400 can be switched between a notebook mode and a tablet mode. For example, the aforementioned antenna structure 100 can be disposed between the keyboard frame 430 and the base housing 440, but is not limited thereto. In some embodiments, the base housing 440 may further have an antenna window (Antenna Window) (not shown) corresponding to the aforementioned antenna structure 100 , so that the electromagnetic waves of the antenna structure 100 can be transmitted through the antenna window.

[0091] Figure 5 The return loss graph of the antenna structure 100 when the transformable mobile device 400 according to an embodiment of the present invention operates in the notebook mode is shown, wherein the horizontal axis represents the operating frequency (MHz) and the vertical axis represents the return loss (dB). Figure 5 According to the measurement results, the antenna structure 100 can cover a first frequency band FB1, a second frequency band FB2, and a third frequency band FB3. For example, the first frequency band FB1 can be between 2400MHz and 2500MHz, the second frequency band FB2 can be between 5000MHz and 6000MHz, and the third frequency band FB3 can be between 6000MHz and 7800MHz. Therefore, the antenna structure 100 will at least support the broadband operation of the traditional WLAN (Wireless Local Area Network) and the new generation Wi-Fi 6E.

[0092] In some embodiments, when the deformable mobile device 400 operates in the notebook mode, the operating principle of the antenna structure 100 can be described as follows. The first short-circuit radiating portion 150, the connecting radiating portion 120, and the first radiating portion 130 can be jointly excited to generate the aforementioned first frequency band FB1. The feeding radiating portion 110, the connecting radiating portion 120, and the second radiating portion 140 can be jointly excited to generate the aforementioned second frequency band FB2. In addition, the second short-circuit radiating portion 160 can be coupled and excited by the second radiating portion 140 to generate the aforementioned third frequency band FB3.

[0093] Figure 6 The graph shows the return loss of the antenna structure 100 when the transformable mobile device 400 according to an embodiment of the present invention operates in the tablet mode, wherein the horizontal axis represents the operating frequency (MHz) and the vertical axis represents the return loss (dB). Figure 6 According to the measurement results, in tablet mode, the antenna structure 100 can also cover a first auxiliary frequency band FA1 and a second auxiliary frequency band FA2. For example, the first auxiliary frequency band FA1 can be between 2300MHz and 2450MHz, and the second auxiliary frequency band FA2 can be between 2450MHz and 2600MHz. It must be noted that when the transformable mobile device 400 switches from notebook mode to tablet mode, the aforementioned first frequency band FB1 of the antenna structure 100 will be replaced by the first auxiliary frequency band FA1 and the second auxiliary frequency band FA2, wherein the combination of the first auxiliary frequency band FA1 and the second auxiliary frequency band FA2 can provide a relatively large low-frequency bandwidth. In addition, the antenna structure 100 will still support the aforementioned second frequency band FB2 and third frequency band FB3.

[0094] In some embodiments, when the deformable mobile device 400 operates in the tablet mode, the operating principle of the antenna structure 100 can be described as follows. The second short-circuit radiating portion 160 and the first radiating portion 130 can jointly excite to generate the aforementioned first auxiliary frequency band FA1. The feed radiating portion 110, the connecting radiating portion 120, and the first radiating portion 130 can jointly excite to generate the aforementioned second auxiliary frequency band FA2. According to actual measurement results, the addition of the second short-circuit radiating portion 160 can simultaneously fine-tune the impedance matching of the first frequency band FB1 (or the first auxiliary frequency band FA1 and the second auxiliary frequency band FA2), the second frequency band FB2, and the third frequency band FB3, so that the antenna structure 100 can provide sufficient operational bandwidth regardless of whether the deformable mobile device 400 operates in the notebook mode or the tablet mode. In other embodiments, the antenna structure 100 can also be used alone, and does not necessarily have to be combined with the deformable mobile device 400.

[0095] In some embodiments, the dimensions of the elements of the antenna structure 100 may be as follows. The total length L1 of the first short-circuit radiating portion 150, the connecting radiating portion 120, and the first radiating portion 130 may be substantially equal to 0.25 times the wavelength (λ / 4) of the first frequency band FB1 of the antenna structure 100. The total length L2 of the feed radiating portion 110, the connecting radiating portion 120, and the second radiating portion 140 may be substantially equal to 0.25 times the wavelength (λ / 4) of the second frequency band FB2 of the antenna structure 100. The length L3 of the second short-circuit radiating portion 160 may be substantially equal to 0.25 times the wavelength (λ / 4) of the first frequency band FB1 of the antenna structure 100. The total length L4 of the second short-circuit radiating portion 160 and the first radiating portion 130 may be substantially equal to 0.25 times the wavelength (λ / 4) of the first auxiliary frequency band FA1 of the antenna structure 100. The total length L5 of the feed radiating portion 110, the connecting radiating portion 120, and the first radiating portion 130 may be substantially equal to 0.25 times the wavelength (λ / 4) of the second auxiliary frequency band FA2 of the antenna structure 100. The width of the coupling gap GC1 may be greater than 0 mm and less than or equal to 3 mm. The above range of element sizes is obtained based on multiple experimental results, which helps to optimize the impedance matching and operating bandwidth of the antenna structure 100, especially when the transformable mobile device 400 operates in both the notebook mode and the tablet mode.

[0096] The following embodiments will introduce different configurations and detailed structural features of the antenna structure 100. It must be understood that these drawings and descriptions are only examples and are not intended to limit the scope of the present invention.

[0097] Figure 7 A top view of an antenna structure 700 according to an embodiment of the present invention is shown. Figure 7 and Figure 1 Similar. Figure 7 In the embodiment of the present invention, the antenna structure 700 is a planar antenna structure, wherein a carrier element 770 of the antenna structure 700 is implemented by a printed circuit board (PCB). In addition, a second short-circuit radiating portion 760 of the antenna structure 700 has a first end 761 and a second end 762, wherein a second ground point GP2 is located at the first end 761 of the second short-circuit radiating portion 760. Overall, the first ground point GP1 and the second ground point GP2 of the antenna structure 700 may be substantially symmetrical to each other according to the feed radiating portion 110 therebetween. Similarly, the length L6 of the second short-circuit radiating portion 760 may be substantially equal to 0.25 times the wavelength (λ / 4) of the first frequency band FB1 of the antenna structure 700. Figure 7 The remaining features of the antenna structure 700 are the same as Figure 1 The antenna structure 100 is similar, so the two embodiments can achieve similar operating effects.

[0098] The present invention proposes a novel antenna structure. Compared with the conventional design, the present invention has at least the advantages of small size, wide bandwidth, good communication quality, and the ability to be combined with deformable mobile devices with different operation modes, so it is very suitable for application in various communication devices.

[0099] It is worth noting that the above-mentioned element size, element shape, and frequency range are not limiting conditions of the present invention. Antenna designers can adjust these settings according to different needs. The antenna structure of the present invention is not limited to Figure 1-Figure 7 The present invention may only include Figure 1-Figure 7 In other words, not all the features shown in the figures need to be implemented in the antenna structure of the present invention at the same time.

[0100] In the present specification and claims, ordinal numbers, such as "first", "second", "third", etc., have no sequential relationship with each other, and are only used to distinguish two different components with the same name.

[0101] Although the present invention is disclosed as above in terms of preferred embodiments, it is not intended to limit the scope of the present invention. Any technician in this field should be able to make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the attached claims.

Claims

1. An antenna structure, comprising: A feeding radiation portion, the feeding radiation portion having a feeding point; a connecting radiation portion, the connecting radiation portion being coupled to the feeding radiation portion; a first radiating portion, the first radiating portion being coupled to the connecting radiating portion; a second radiating portion, the second radiating portion being coupled to the connecting radiating portion, wherein the second radiating portion and the first radiating portion extend substantially in opposite directions; a first short-circuit radiation portion, wherein the feeding radiation portion and the connecting radiation portion are both coupled to a first ground point via the first short-circuit radiation portion; a second short-circuit radiating portion, the second short-circuit radiating portion being adjacent to the second radiating portion, wherein the connecting radiating portion and the first radiating portion are both coupled to a second ground point via the second short-circuit radiating portion; and A carrier element, wherein the feed radiation portion, the connection radiation portion, the first radiation portion, the second radiation portion, the first short-circuit radiation portion, and the second short-circuit radiation portion are all distributed on the carrier element.

2. The antenna structure as claimed in claim 1, wherein the carrier element is implemented by a non-conductive support element, a speaker element, or a printed circuit board. The antenna structure as claimed in claim 1 , wherein the carrier element is in the shape of a cuboid. 4 . The antenna structure as claimed in claim 1 , wherein the carrier element has a first surface, a second surface, and a third surface, the third surface and the first surface are opposite to each other, and the second surface is between the first surface and the third surface. 5 . The antenna structure as claimed in claim 4 , wherein the feed point and the first ground point are disposed on the same surface of the carrier element. The antenna structure as claimed in claim 5 , wherein the second ground point is disposed on another surface of the carrier element.

7. The antenna structure as described in claim 4, wherein the feed radiation portion, the second radiation portion, and the first short-circuit radiation portion are all arranged on the first surface of the carrier element, the first radiation portion is arranged on the second surface of the carrier element, the connecting radiation portion extends from the first surface of the carrier element to the second surface, and the second short-circuit radiation portion extends from the second surface of the carrier element to the third surface. 8 . The antenna structure as claimed in claim 1 , wherein a coupling gap is formed between the second short-circuit radiating portion and the second radiating portion, and a width of the coupling gap is greater than 0 mm and less than or equal to 3 mm. 9 . The antenna structure as claimed in claim 1 , wherein the feeding radiation portion and the connecting radiation portion are both substantially arranged on a separation line. 10 . The antenna structure as claimed in claim 9 , wherein the first radiating portion and the first short-circuited radiating portion are both located at a same side of the dividing line, and the second radiating portion and the second short-circuited radiating portion are both located at another side of the dividing line. 11 . The antenna structure as claimed in claim 1 , wherein the antenna structure covers a first frequency band, a second frequency band, and a third frequency band. 12 . The antenna structure as claimed in claim 11 , wherein the first frequency band is between 2400 MHz and 2500 MHz, the second frequency band is between 5000 MHz and 6000 MHz, and the third frequency band is between 6000 MHz and 7800 MHz. 13 . The antenna structure as claimed in claim 11 , wherein a total length of the first short-circuit radiating portion, the connecting radiating portion, and the first radiating portion is substantially equal to 0.25 times the wavelength of the first frequency band. 14 . The antenna structure as claimed in claim 11 , wherein a total length of the feed radiation portion, the connection radiation portion, and the second radiation portion is substantially equal to 0.25 times the wavelength of the second frequency band. 15 . The antenna structure as claimed in claim 11 , wherein a length of the second short-circuit radiating portion is substantially equal to 0.25 times the wavelength of the first frequency band. 16 . The antenna structure as claimed in claim 11 , wherein the antenna structure further covers a first auxiliary frequency band and a second auxiliary frequency band. 17 . The antenna structure as claimed in claim 16 , wherein the first auxiliary frequency band is between 2300 MHz and 2450 MHz, and the second auxiliary frequency band is between 2450 MHz and 2600 MHz. 18 . The antenna structure of claim 16 , wherein a total length of the second short-circuit radiating portion and the first radiating portion is substantially equal to 0.25 times the wavelength of the first auxiliary frequency band. 19 . The antenna structure as claimed in claim 16 , wherein a total length of the feed radiation portion, the connection radiation portion, and the first radiation portion is substantially equal to 0.25 times the wavelength of the second auxiliary frequency band. 20 . The antenna structure as claimed in claim 1 , wherein the antenna structure is applied in a transformable mobile device, and the transformable mobile device selectively operates in a notebook mode or a tablet mode.

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