Antenna structure

Abstract

Provided is an antenna structure. The antenna structure comprises a grounding element, a feed-in radiation part, a connection radiation part, a coupling radiation part, a first short-circuit radiation part and a second short-circuit radiation part, the feed-in radiation part is provided with a feed-in point; the coupling radiation part can be coupled to the feed-in radiation part through the connecting radiation part; the coupling radiation part can also be coupled to a first grounding point on the grounding element through the first short-circuit radiation part; the feed-in radiation part can also be coupled to a second grounding point on the grounding element through the second short-circuit radiation part; the grounding element, the connection radiation part, the first short-circuit radiation part and the second short-circuit radiation part jointly form a circulation structure. Compared with a traditional design, the antenna at least has the advantages of being small in size, wide in frequency band, low in manufacturing cost, capable of adapting to various using environments and the like, and therefore the antenna is very suitable for being applied to various mobile 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 hybrid portable electronic devices. 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 use 2.4GHz, 5.2GHz and 5.8GHz frequency bands for communication.

[0003] Antennas are indispensable components in the field of wireless communications. If the bandwidth of an antenna used to receive or transmit signals is insufficient, the communication quality of a mobile device can be easily degraded. Therefore, how to design a small-sized, wide-bandwidth antenna element is an important issue for antenna 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, comprising: a grounding element; a feed radiating portion having a feed point; a connecting radiating portion; a coupling radiating portion coupled to the feed radiating portion via the connecting radiating portion; a first short-circuit radiating portion, wherein the coupling radiating portion is also coupled to a first grounding point on the grounding element via the first short-circuit radiating portion; and a second short-circuit radiating portion, wherein the feed radiating portion is also coupled to a second grounding point on the grounding element via the second short-circuit radiating portion; wherein the grounding element, the connecting radiating portion, the first short-circuit radiating portion, and the second short-circuit radiating portion together form a loop structure.

[0006] In some embodiments, the coupled radiation portion includes a narrower portion and a wider portion, and the wider portion is coupled to the connecting radiation portion and the first short-circuit radiation portion via the narrower portion.

[0007] In some embodiments, the coupling radiation portion is in an inverted T shape, an L shape, or an I shape.

[0008] In some embodiments, the coupled radiation portion has a first edge, a second edge, and a third edge, and the third edge is between the first edge and the second edge.

[0009] In some embodiments, a first coupling gap is formed between the first edge or the second edge of the feeding radiation portion and the coupling radiation portion.

[0010] In some embodiments, a width of the first coupling gap is between 0.05 mm and 4 mm.

[0011] In some embodiments, a second coupling gap is formed between the ground element and the third edge of the coupling radiation portion.

[0012] In some embodiments, the width of the second coupling gap is between 0.05 mm and 3 mm.

[0013] In some embodiments, the feeding radiation portion and the coupling radiation portion are both surrounded by a loop structure.

[0014] In some embodiments, the antenna structure further includes: a non-conductive supporting element, wherein the grounding element, the feeding radiation portion, the connecting radiation portion, the coupling radiation portion, the first short-circuit radiation portion, and the second short-circuit radiation portion are all disposed on the non-conductive supporting element.

[0015] In some embodiments, the non-conductive supporting element has a first surface and a second surface perpendicular to each other, and the grounding element, the feeding radiation portion, the connecting radiation portion, the coupling radiation portion, the first short-circuit radiation portion, and the second short-circuit radiation portion are distributed on the first surface and the second surface.

[0016] In some embodiments, the coupled radiation portion is a first coupled radiation portion, and the antenna structure further includes: a second coupled radiation portion coupled to a connection point on the second short-circuit radiation portion, wherein the feed radiation portion is disposed between the first coupled radiation portion and the second coupled radiation portion.

[0017] In some embodiments, the antenna structure covers a low frequency band, a first high frequency band, a second high frequency band, and a third high frequency band.

[0018] In some embodiments, the low frequency band is between 2400 MHz and 2500 MHz, the first high frequency band is between 5100 MHz and 6000 MHz, the second high frequency band is between 6000 MHz and 6600 MHz, and the third high frequency band is between 6600 MHz and 7125 MHz.

[0019] In some embodiments, a first resonant path is formed along the feeding radiation portion, the connecting radiation portion, the first edge, the third edge, the second edge, the first short-circuit radiation portion, and the grounding element, and the first resonant path excites a low-frequency band and a second high-frequency band.

[0020] In some embodiments, the length of the first resonant path is substantially equal to 0.5 wavelengths of the low frequency band.

[0021] In some embodiments, a second resonance path is formed along the first edges of the feeding radiation portion, the connecting radiation portion, and the coupling radiation portion, and the second resonance path excites and generates a first high frequency band.

[0022] In some embodiments, the length of the second resonant path is substantially equal to 0.5 times the wavelength of the first high frequency band.

[0023] In some embodiments, a third resonant path is formed along the feeding radiation portion and the second short-circuit radiation portion, and the third resonant path excites and generates a third high-frequency band.

[0024] In some embodiments, the length of the third resonant path is substantially equal to 0.5 times the wavelength of the third high frequency band.

[0025] The present invention proposes a novel antenna structure, which includes at least one loop structure. Compared with the traditional design, the present invention has at least the advantages of small size, wide bandwidth, low manufacturing cost, and adaptability to various use environments, so it is very suitable for application in various mobile communication devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram showing an antenna structure according to an embodiment of the present invention.

[0027] Figure 2 A return loss diagram of an antenna structure according to an embodiment of the present invention is shown.

[0028] Figure 3 A three-dimensional diagram of a notebook computer according to an embodiment of the present invention is shown.

[0029] Figure 4 A three-dimensional diagram showing an antenna structure according to an embodiment of the present invention.

[0030] Figure 5 A three-dimensional diagram showing an antenna structure according to an embodiment of the present invention.

[0031] Figure 6 A three-dimensional diagram showing an antenna structure according to an embodiment of the present invention.

[0032] Figure 7A three-dimensional diagram showing an antenna structure according to an embodiment of the present invention.

[0033] Main component symbols:

[0034] 100, 400, 500, 600, 700 antenna structure

[0035] 110 Grounding element

[0036] 120 Feeding radiation part

[0037] 121 Feeding the first end of the radiation part

[0038] 122 Feed the second end of the radiation part

[0039] 130 Connect the radiating part

[0040] 131 Connect the first end of the radiation part

[0041] 132 Connect the second end of the radiation part

[0042] 140 coupling radiation portion, first coupling radiation portion

[0043] 640, 740 coupled radiation part

[0044] 141 The first edge of the coupled radiation portion

[0045] 142 The second edge of the coupling radiation portion

[0046] 143 The third edge of the coupled radiation portion

[0047] 144 Narrow part of the coupled radiating section

[0048] 145 Wider part of the coupled radiating section

[0049] 150 First short-circuit radiation part

[0050] 151 The first end of the first short-circuit radiation portion

[0051] 152 The second end of the first short-circuit radiation portion

[0052] 160 Second short-circuit radiation part

[0053] 161 The first end of the second short-circuit radiation portion

[0054] 162 The second end of the second short-circuit radiation portion

[0055] 170 Loop Structure

[0056] 180 Non-conductive support element

[0057] 199 Signal Source

[0058] 300 Notebook Computer

[0059] 330 Keyboard frame

[0060] 340 Base housing

[0061] 350 Rotating shaft element

[0062] 490 Second coupled radiation portion

[0063] 641, 741 first end of the coupled radiation portion

[0064] 642, 742 second end of the coupling radiation portion

[0065] 646 The bent end of the coupled radiating part

[0066] CP connection point

[0067] E1 First surface of non-conductive support element

[0068] E2 Second surface of non-conductive support element

[0069] FBL Low Frequency Band

[0070] FBH1 First high frequency band

[0071] FBH2 Second high frequency band

[0072] FBH3 Third high frequency band

[0073] FP Feed Point

[0074] GC1 First coupling gap

[0075] GC2 Second coupling gap

[0076] GP1 First grounding point

[0077] GP2 Second grounding point

[0078] PA1 First resonance path

[0079] PA2 Second resonance path

[0080] PA3 Third Resonance Path

[0081] VSS Ground potential

[0082] W1, W2 Width DETAILED DESCRIPTION

[0083] In order to make the purpose, features and advantages of the present invention more clearly understood, specific embodiments of the present invention are given below with reference to the accompanying drawings for detailed description as follows.

[0084] 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.

[0085] 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, different examples in the following specification may reuse the same reference symbols or (and) marks. These repetitions are for the purpose of simplification and clarity, and are not intended to limit the specific relationship between the different embodiments or (and) structures discussed.

[0086] In addition, spatially relative terms such as "below," "beneath," "lower," "above," "upper," and the like are used to facilitate describing the relationship between one element or feature and 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 other orientations), and the spatially relative terms used herein should be interpreted accordingly.

[0087] Figure 1A three-dimensional diagram of an antenna structure 100 according to an embodiment of the present invention is shown. The antenna structure 100 can be applied to a mobile device, such as a smart phone, a tablet computer, or a notebook computer. Figure 1 In the embodiment of the present invention, the antenna structure 100 at least includes: a ground element 110, a feeding radiation element 120, a connection radiation element 130, a coupling radiation element 140, a first short-circuit radiation element 150, and a second short-circuit radiation element 160, wherein the ground element 110, the feeding radiation element 120, the connection radiation element 130, the coupling 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.

[0088] The ground element 110 may be implemented by a ground copper foil. In some embodiments, the ground element 110 may also be coupled to a ground voltage VSS, which may be provided by a system ground plane of the antenna structure 100 (not shown).

[0089] The feeding radiation portion 120 has a first end 121 and a second end 122, wherein a feeding point FP is located at the first end 121 of the feeding radiation portion 120. The feeding point FP can also be coupled to a positive electrode of a signal source 199, and a negative electrode of the signal source 199 can be coupled to the ground element 110. For example, the signal source 199 can be a radio frequency (RF) module, which can be used to excite the antenna structure 100. In some embodiments, the feeding radiation portion 120 can be substantially in the shape of a straight strip, but is not limited thereto.

[0090] The connecting radiation portion 130 and the feeding radiation portion 120 may be substantially perpendicular to each other, but not limited thereto. Specifically, the connecting radiation portion 130 has a first end 131 and a second end 132, wherein the first end 131 of the connecting radiation portion 130 is coupled to the second end 122 of the feeding radiation portion 120. In some embodiments, the connecting radiation portion 130 may be substantially in another straight strip shape, but not limited thereto.

[0091] The coupling radiation portion 140 may have a first edge 141, a second edge 142, and a third edge 143, wherein the first edge 141 and the second edge 142 may be opposite to each other, and the third edge 143 may be between the first edge 141 and the second edge 142. In detail, the coupling radiation portion 140 includes a narrow portion 144 and a wide portion 145, wherein the wide portion 145 may be coupled to the second end 132 of the connecting radiation portion 130 via the narrow portion 144. That is, the coupling radiation portion 140 may be coupled to the feeding radiation portion 120 via the connecting radiation portion 130. In some embodiments, the coupling radiation portion 140 may substantially present an inverted T shape, but is not limited thereto.

[0092] In addition, the coupling radiation portion 140 may be adjacent to the feeding radiation portion 120. It should be noted that the term "adjacent" or "adjacent" in this specification may refer to a distance between the corresponding two elements being less than a predetermined distance (e.g., 10 mm or shorter), but generally does not include a situation where the corresponding two elements are in direct contact with each other (i.e., the aforementioned distance is shortened to 0). In some embodiments, a first coupling gap GC1 may be formed between the first edge 141 of the feeding radiation portion 120 and the coupling radiation portion 140, and a second coupling gap GC2 may be formed between the grounding element 110 and the third edge 143 of the coupling radiation portion 140. However, the present invention is not limited thereto. In other embodiments, the positions of the feeding radiation portion 120 and the coupling radiation portion 140 may be swapped with each other, so that another first coupling gap GC1 may be formed between the second edge 142 of the feeding radiation portion 120 and the coupling radiation portion 140.

[0093] The first short-circuit radiating portion 150 has a first end 151 and a second end 152, wherein the first end 151 of the first short-circuit radiating portion 150 is coupled to a first grounding point GP1 on the grounding element 110, and the second end 152 of the first short-circuit radiating portion 150 is coupled to the second end 132 of the connecting radiating portion 130 and the narrower portion 144 of the coupling radiating portion 140. That is, both the connecting radiating portion 130 and the coupling radiating portion 140 can be coupled to the grounding element 110 via the first short-circuit radiating portion 150. In some embodiments, the first short-circuit radiating portion 150 can be substantially L-shaped, but is not limited thereto.

[0094] The second short-circuit radiation portion 160 has a first end 161 and a second end 162, wherein the first end 161 of the second short-circuit radiation portion 160 is coupled to a second grounding point GP2 on the grounding element 110, and the second end 162 of the second short-circuit radiation portion 160 is coupled to the second end 122 of the feeding radiation portion 120 and the first end 131 of the connecting radiation portion 130. That is, both the feeding radiation portion 120 and the connecting radiation portion 130 can be coupled to the grounding element 110 via the second short-circuit radiation portion 160. In some embodiments, the second grounding point GP2 is different from the aforementioned first grounding point GP1. For example, the first grounding point GP1 and the second grounding point GP2 can be respectively located at two ends of the grounding element 110, but it is not limited thereto. In some embodiments, the second short-circuit radiation portion 160 can be substantially in another L-shape, but it is not limited thereto.

[0095] It should be noted that the grounding element 110, the connecting radiation portion 130, the first short-circuit radiation portion 150, and the second short-circuit radiation portion 160 can together form a completely closed loop structure (Loop Structure) 170, wherein the feeding radiation portion 120 and the coupling radiation portion 140 can be surrounded by the loop structure 170. For example, if the loop structure 170 is substantially in the shape of a hollow rectangle, the feeding radiation portion 120 and the coupling radiation portion 140 can be located inside the hollow rectangle, but it is not limited thereto.

[0096] In some embodiments, the antenna structure 100 may further include a nonconductive support element 180, wherein the ground element 110, the feed radiation portion 120, the connection radiation portion 130, the coupling radiation portion 140, the first short-circuit radiation portion 150, and the second short-circuit radiation portion 160 may be disposed on the nonconductive support element 180. In detail, the nonconductive support element 180 may have a first surface E1 and a second surface E2 perpendicular to each other, wherein the ground element 110, the feed radiation portion 120, the connection radiation portion 130, the coupling radiation portion 140, the first short-circuit radiation portion 150, and the second short-circuit radiation portion 160 may be distributed on the first surface E1 and the second surface E2 of the nonconductive support element 180. For example, except that the grounding element 110 is only disposed on the first surface E1 and the connecting radiation portion 130 is only disposed on the second surface E2, the rest such as the feeding radiation portion 120, the coupling radiation portion 140, the first short-circuit radiation portion 150, and the second short-circuit radiation portion 160 can all extend from the first surface E1 to the second surface E2. However, the present invention is not limited to this. In other embodiments, the non-conductive support element 180 can be implemented by a printed circuit board (PCB), so that the antenna structure 100 can become a planar antenna structure, but it will not affect its actual radiation performance.

[0097] Figure 2 A graph showing the return loss of the antenna structure 100 according to an embodiment of the present invention is shown, wherein the horizontal axis represents the operating frequency (MHz) and the vertical axis represents the return loss (dB). Figure 2 According to the measurement results, the antenna structure 100 can cover a low frequency band (Frequency Band) FBL, a first high frequency band FBH1, a second high frequency band FBH2, and a third high frequency band FBH3. For example, the low frequency band FBL can be between 2400MHz and 2500MHz, the first high frequency band FBH1 can be between 5100MHz and 6000MHz, the second high frequency band FBH2 can be between 6000MHz and 6600MHz, and the third high frequency band FBH3 can be between 6600MHz and 7125MHz. 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.

[0098] In some embodiments, the operating principle of the antenna structure 100 can be as follows. A first resonant path PA1 can be formed along the feeding radiation portion 120, the connecting radiation portion 130, the first edge 141, the third edge 143, the second edge 142, the first short-circuit radiation portion 150, and the grounding element 110, wherein the first resonant path PA1 can excite the aforementioned low-frequency band FBL and the second high-frequency band FBH2. In addition, a second resonant path PA2 can be formed along the feeding radiation portion 120, the connecting radiation portion 130, and the first edge 141 of the coupling radiation portion 140, wherein the second resonant path PA2 can excite the aforementioned first high-frequency band FBH1. In the coupling radiation part 140, the length of the first resonance path PA1 and the length of the second resonance path PA2 can be adjusted simultaneously by changing the width W1 of the narrower part 144 and the width W2 of the wider part 145, wherein the change of the width W1 of the narrower part 144 can affect the feed matching of the antenna structure 100, and the change of the width W2 of the wider part 145 can affect the width of the first coupling gap GC1 and the width of the second coupling gap GC2. Furthermore, a third resonance path PA3 can be formed along the feeding radiation part 120 and the second short-circuit radiation part 160, wherein the third resonance path PA3 can excite the aforementioned third high-frequency band FBH3. According to actual measurement results, the first coupling gap GC1 and the second coupling gap GC2 can be used to fine-tune the impedance matching (Impedance Matching) of the aforementioned low-frequency band FBL, the first high-frequency band FBH1, the second high-frequency band FBH2, and the third high-frequency band FBH3, thereby increasing its operational bandwidth (Operational Bandwidth).

[0099] In some embodiments, the element sizes of the antenna structure 100 may be as follows. The length of the first resonant path PA1 may be approximately equal to 0.5 times the wavelength (λ / 2) of the low frequency band FBL of the antenna structure 100. The length of the second resonant path PA2 may be approximately equal to 0.5 times the wavelength (λ / 2) of the first high frequency band FBH1 of the antenna structure 100. The length of the third resonant path PA3 may be approximately equal to 0.5 times the wavelength (λ / 2) of the third high frequency band FBH3 of the antenna structure 100. In the coupled radiation portion 140, the width W1 of the narrower portion 144 may be between 2 mm and 6 mm, and the width W2 of the wider portion 145 may be between 9 mm and 13 mm. The width of the first coupling gap GC1 may be greater than or equal to the width of the second coupling gap GC2. For example, the width of the first coupling gap GC1 may be between 0.05 mm and 4 mm, and the width of the second coupling gap GC2 may be between 0.05 mm and 3 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 100 .

[0100] 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.

[0101] Figure 3 A three-dimensional diagram of a notebook computer 300 according to an embodiment of the present invention is shown. Figure 3 In the embodiment of the present invention, the antenna structure 100 can be applied to a notebook computer 300, wherein the notebook computer 300 at least includes a keyboard frame 330, a base housing 340, and a hinge element 350. It should be understood that the keyboard frame 330 and the base housing 340 are respectively equivalent to the so-called "C part" and "D part" in the field of notebook computers. In detail, the antenna structure 100 can be arranged between the keyboard frame 330 and the base housing 340, and can be adjacent to the hinge element 350. Under this design, even if the keyboard frame 330 and the base housing 340 are both made of metal materials, the main radiation direction of the antenna structure 100 can be configured to be toward the hinge element 350, so that the antenna structure 100 can provide sufficient radiation gain. In addition, the three-dimensional design of the non-conductive support element 180 allows the antenna structure 100 to correspond to different shapes of the hinge element 350.

[0102] Figure 4 A perspective view of an antenna structure 400 according to an embodiment of the present invention is shown. Figure 4 and Figure 1Similar. Figure 4 In the embodiment of the present invention, the aforementioned coupling radiation portion 140 can be regarded as a first coupling radiation portion, and the antenna structure 400 can also include a second coupling radiation portion 490, wherein the second coupling radiation portion 490 can also be surrounded by the loop structure 170. For example, the second coupling radiation portion 490 can roughly present another relatively smaller inverted T-shape, which can be coupled to a connection point (Connection Point) CP on the second short-circuit radiation portion 160. It must be noted that the aforementioned feeding radiation portion 120 is arranged between the first coupling radiation portion 140 and the second coupling radiation portion 490. According to actual measurement results, the addition of the second coupling radiation portion 490 helps to further increase the operating bandwidth of the antenna structure 400 (especially the bandwidth of the first high-frequency band FBH1, the second high-frequency band FBH2, and the third high-frequency band FBH3). Figure 4 The remaining features of the antenna structure 400 are the same as Figure 1 The antenna structure 100 is similar, so the two embodiments can achieve similar operating effects.

[0103] Figure 5 A perspective view of an antenna structure 500 according to an embodiment of the present invention is shown. Figure 5 and Figure 4 Similar. Figure 5 In the embodiment, the antenna structure 500 may also include only the second coupling radiation portion 490, but not the first coupling radiation portion 140. According to actual measurement results, the addition of the second coupling radiation portion 490 can further subdivide the first high-frequency band FBH1, the second high-frequency band FBH2, and the third high-frequency band FBH3 of the antenna structure 500 into more sub-bands, so that the impedance matching of each sub-band can be adjusted. Figure 5 The remaining features of the antenna structure 500 are the same as Figure 4 The antenna structure 400 is similar, so the two embodiments can achieve similar operating effects.

[0104] Figure 6 A perspective view of an antenna structure 600 according to an embodiment of the present invention is shown. Figure 6 and Figure 1 Similar. Figure 6In the embodiment of the present invention, a coupling radiation portion 640 of the antenna structure 600 may be substantially L-shaped. Specifically, the coupling radiation portion 640 has a first end 641 and a second end 642, wherein the first end 641 of the coupling radiation portion 640 is coupled to the connecting radiation portion 130 and the first short-circuit radiation portion 150, and the second end 642 of the coupling radiation portion 640 is an open end. In addition, the coupling radiation portion 640 may further include a terminal bending portion 646, so that the second end 642 of the coupling radiation portion 640 may extend in a direction away from the ground element 110. According to actual measurement results, since the length of the second resonance path corresponding to the first high-frequency band FBH1 of the antenna structure 600 will become shorter, the L-shaped coupling radiation portion 640 will be used to adjust the high-frequency frequency shift of the antenna structure 600, wherein the aforementioned first high-frequency band FBH1 will also become higher than before. Figure 6 The remaining features of the antenna structure 600 are the same as Figure 1 The antenna structure 100 is similar, so the two embodiments can achieve similar operating effects.

[0105] Figure 7 A perspective 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, a coupled radiation portion 740 of the antenna structure 700 may be substantially in an I-shape. Specifically, the coupled radiation portion 740 has a first end 741 and a second end 742, wherein the first end 741 of the coupled radiation portion 740 is coupled to the connecting radiation portion 130 and the first short-circuit radiation portion 150, and the second end 742 of the coupled radiation portion 740 is an open end and may extend in a direction close to the ground element 110. According to actual measurement results, the coupled radiation portion 740 in an I-shape may be used to enhance the radiation gain 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.

[0106] It must be understood that in Figure 4 , Figure 5 , Figure 6 , Figure 7 In the embodiment, in order to achieve better radiation performance and meet various design purposes, the actual shape of each radiation portion can be slightly adjusted.

[0107] The present invention proposes a novel antenna structure, which includes at least one loop structure. Compared with the traditional design, the present invention has at least the advantages of small size, wide bandwidth, low manufacturing cost, and adaptability to various use environments, so it is very suitable for application in various mobile communication devices.

[0108] 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.

[0109] 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.

[0110] 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 what is defined in the attached claims.

Claims

1. An antenna structure, comprising: a grounding element; A feeding radiation portion, the feeding radiation portion having a feeding point; A connecting radiation part; a coupled radiation portion, the coupled radiation portion being coupled to the feeding radiation portion via the connecting radiation portion; a first short-circuit radiating portion, wherein the coupled radiating portion is further coupled to a first grounding point on the grounding element via the first short-circuit radiating portion; and a second short-circuit radiation portion, wherein the feed radiation portion is further coupled to a second ground point on the ground element via the second short-circuit radiation portion; The grounding element, the connecting radiation portion, the first short-circuit radiation portion, and the second short-circuit radiation portion together form a loop structure. 2 . The antenna structure as claimed in claim 1 , wherein the coupled radiation portion comprises a narrower portion and a wider portion, and the wider portion is coupled to the connecting radiation portion and the first short-circuit radiation portion via the narrower portion. 3 . The antenna structure as claimed in claim 1 , wherein the coupled radiation portion is in an inverted T shape, an L shape, or an I shape. 4 . The antenna structure as claimed in claim 1 , wherein the coupled radiation portion has a first edge, a second edge, and a third edge, and the third edge is between the first edge and the second edge. 5 . The antenna structure as claimed in claim 4 , wherein a first coupling gap is formed between the first edge or the second edge of the feeding radiation portion and the coupling radiation portion. 6 . The antenna structure as claimed in claim 5 , wherein a width of the first coupling gap is between 0.05 mm and 4 mm. 7 . The antenna structure as claimed in claim 4 , wherein a second coupling gap is formed between the ground element and the third edge of the coupling radiation portion. 8 . The antenna structure as claimed in claim 7 , wherein a width of the second coupling gap is between 0.05 mm and 3 mm. 9 . The antenna structure as claimed in claim 1 , wherein the feeding radiation portion and the coupling radiation portion are both surrounded by the loop structure.

10. The antenna structure according to claim 1, further comprising: A non-conductive supporting element, wherein the grounding element, the feeding radiation portion, the connecting radiation portion, the coupling radiation portion, the first short-circuit radiation portion, and the second short-circuit radiation portion are all disposed on the non-conductive supporting element.

11. The antenna structure as claimed in claim 10, wherein the non-conductive supporting element has a first surface and a second surface which are perpendicular to each other, and the grounding element, the feeding radiation portion, the connecting radiation portion, the coupling radiation portion, the first short-circuit radiation portion, and the second short-circuit radiation portion are distributed on the first surface and the second surface.

12. The antenna structure as claimed in claim 1, wherein the coupled radiation portion is a first coupled radiation portion, and the antenna structure further comprises: A second coupled radiation portion is coupled to a connection point on the second short-circuit radiation portion, wherein the feed radiation portion is disposed between the first coupled radiation portion and the second coupled radiation portion. 13 . The antenna structure as claimed in claim 4 , wherein the antenna structure covers a low frequency band, a first high frequency band, a second high frequency band, and a third high frequency band.

14. The antenna structure of claim 13, wherein the low frequency band is between 2400 MHz and 2500 MHz, the first high frequency band is between 5100 MHz and 6000 MHz, the second high frequency band is between 6000 MHz and 6600 MHz, and the third high frequency band is between 6600 MHz and 7125 MHz.

15. The antenna structure as described in claim 13, wherein a first resonant path is formed along the feed radiating portion, the connecting radiating portion, the first edge, the third edge, the second edge, the first short-circuit radiating portion, and the grounding element, and the first resonant path excites the low-frequency band and the second high-frequency band. 16 . The antenna structure of claim 15 , wherein a length of the first resonant path is substantially equal to 0.5 times the wavelength of the low frequency band. 17 . The antenna structure as claimed in claim 13 , wherein a second resonant path is formed along the first edge of the feeding radiation portion, the connecting radiation portion, and the coupling radiation portion, and the second resonant path excites and generates the first high-frequency band. 18 . The antenna structure of claim 17 , wherein a length of the second resonant path is substantially equal to 0.5 times the wavelength of the first high frequency band. 19 . The antenna structure as claimed in claim 13 , wherein a third resonant path is formed along the feeding radiation portion and the second short-circuit radiation portion, and the third resonant path excites and generates the third high-frequency band. 20 . The antenna structure of claim 19 , wherein a length of the third resonant path is substantially equal to 0.5 times the wavelength of the third high frequency band.

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