Antenna structure

Abstract

The utility model provides an antenna structure. The antenna structure comprises a feed-in radiation part, a first radiation part, a second radiation part, a third radiation part, a fourth radiation part, a fifth radiation part and a sixth radiation part. The feed-in radiation part is provided with a feed-in point. The first radiation part is coupled to the feed-in radiation part. The second radiation part is coupled to the feed-in radiation part. The first radiation portion and the second radiation portion extend substantially in opposite directions. The third radiation part is coupled to a first grounding point. The fourth radiation part is coupled to the third radiation part, wherein both the third radiation part and the fourth radiation part are adjacent to the second radiation part. The fifth radiation part is coupled to a second grounding point, wherein the fifth radiation part is adjacent to the first radiation part. The sixth radiation part is coupled to a third grounding point, wherein the sixth radiation part is arranged relative to the third radiation part.

Description

Technical Field

[0001] The present utility model relates to an antenna structure, and more particularly to an antenna structure with wideband characteristics. Background Art

[0002] With the development of mobile communication technologies, mobile devices have become increasingly common in recent years. Common examples include: laptop computers, mobile phones, multimedia players, and other portable electronic devices with hybrid functions. To meet people's needs, mobile devices usually have wireless communication capabilities. Some cover long-distance wireless communication ranges. For example, mobile phones use 2G, 3G, LTE (Long Term Evolution) systems and the frequency bands of 700 MHz, 850 MHz, 900 MHz, 1800 MHz, 1900 MHz, 2100 MHz, 2300 MHz, and 2500 MHz for communication. Some cover short-distance wireless communication ranges. For example, Wi-Fi and Bluetooth systems use the frequency bands of 2.4 GHz, 5.2 GHz, and 5.8 GHz for communication.

[0003] An antenna is an essential component in the field of wireless communication. If the operational bandwidth of the antenna used for receiving or transmitting signals is too narrow, it is very likely to cause a decline in the communication quality of the mobile device. Therefore, how to design a small-sized antenna structure with wideband characteristics is an important issue for designers. Summary of the Utility Model

[0004] In a preferred embodiment, the present utility model provides an antenna structure, comprising: a feeding radiation part having a feeding point; a first radiation part coupled to the feeding radiation part; a second radiation part coupled to the feeding radiation part, wherein the first radiation part and the second radiation part extend in substantially opposite directions; a third radiation part coupled to a first grounding point; a fourth radiation part coupled to the third radiation part, wherein the third radiation part and the fourth radiation part are both adjacent to the second radiation part; a fifth radiation part coupled to a second grounding point, wherein the fifth radiation part is adjacent to the first radiation part; a sixth radiation part coupled to a third grounding point, wherein the sixth radiation part is disposed relative to the third radiation part; and a carrier component, wherein the feeding radiation part, the first radiation part, the second radiation part, the third radiation part, the fourth radiation part, the fifth radiation part, and the sixth radiation part are all disposed on the carrier component.

[0005] In some embodiments, the first radiation part includes a first end widening portion, and the sixth radiation part includes a second end widening portion.

[0006] In some embodiments, the fifth radiating portion includes a short - circuit portion, a central portion, a first extension portion, a second extension portion, a third extension portion, and a fourth extension portion. The central portion is coupled to the second ground point via the short - circuit portion, and the first extension portion, the second extension portion, the third extension portion, and the fourth extension portion are all coupled to the central portion.

[0007] In some embodiments, a first coupling gap is formed between the second radiating portion and the third radiating portion, a second coupling gap is formed between the second radiating portion and the fourth radiating portion, a third coupling gap is formed between the first radiating portion and the fifth radiating portion, and the width of each of the first coupling gap, the second coupling gap, and the third coupling gap is less than or equal to 1 mm.

[0008] In some embodiments, the distance between the third radiating portion and the sixth radiating portion is between 8 mm and 10 mm.

[0009] 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 791 MHz and 862 MHz, the second frequency band is between 1710 MHz and 2170 MHz, and the third frequency band is between 2500 MHz and 2690 MHz.

[0010] In some embodiments, the total length of the feeding radiating portion and the first radiating portion is approximately equal to 0.25 times the wavelength of the second frequency band.

[0011] In some embodiments, the total length of the feeding radiating portion and the second radiating portion is approximately equal to 0.25 times the wavelength of the third frequency band.

[0012] In some embodiments, the length of each of the third radiating portion and the fourth radiating portion is approximately equal to 0.25 times the wavelength of the second frequency band.

[0013] In some embodiments, the length of the sixth radiating portion is approximately equal to 0.25 times the wavelength of the third frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To make the above - mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model is provided in conjunction with the accompanying drawings, wherein:

[0015] Figure 1 is a schematic diagram showing the antenna structure according to an embodiment of the present utility model.

[0016] Figure 2 is a voltage standing - wave ratio diagram showing the antenna structure according to an embodiment of the present utility model.

[0017] Reference Signs:

[0018] 100: Antenna Structure

[0019] 110: Feeding Radiation Portion

[0020] 111: First End of the Feeding Radiation Portion

[0021] 112: Second End of the Feeding Radiation Portion

[0022] 120: First Radiation Portion

[0023] 121: First End of the First Radiation Portion

[0024] 122: Second End of the First Radiation Portion

[0025] 125: First End Widening Portion of the First Radiation Portion

[0026] 130: Second Radiation Portion

[0027] 131: First End of the Second Radiation Portion

[0028] 132: Second End of the Second Radiation Portion

[0029] 140: Third Radiation Portion

[0030] 141: First End of the Third Radiation Portion

[0031] 142: Second End of the Third Radiation Portion

[0032] 150: Fourth Radiation Portion

[0033] 151: First End of the Fourth Radiation Portion

[0034] 152: Second End of the Fourth Radiation Portion

[0035] 159: Notch Region

[0036] 160: Fifth Radiation Portion

[0037] 163: Short - Circuit Portion of the Fifth Radiation Portion

[0038] 164: Central Portion of the Fifth Radiation Portion

[0039] 165: First Extension Portion of the Fifth Radiation Portion

[0040] 166: Second Extension Portion of the Fifth Radiation Portion

[0041] 167: Third Extension Portion of the Fifth Radiation Portion

[0042] 168: Fourth Extension Portion of the Fifth Radiation Portion

[0043] 170: The sixth radiating portion

[0044] 171: The first end of the sixth radiating portion

[0045] 172: The second end of the sixth radiating portion

[0046] 175: The widened portion at the second end of the sixth radiating portion

[0047] 180: The carrier assembly

[0048] 190: The signal source

[0049] CP: The connection point

[0050] D1: The spacing

[0051] FB1: The first frequency band

[0052] FB2: The second frequency band

[0053] FB3: The third frequency band

[0054] FP: The feeding point

[0055] GC1: The first coupling gap

[0056] GC2: The second coupling gap

[0057] GC3: The third coupling gap

[0058] GP1: The first grounding point

[0059] GP2: The second grounding point

[0060] GP3: The third grounding point

[0061] L1, L2, L3, L4, L5, L6, L7, L8: The lengths

[0062] VSS: The ground potential Detailed implementation manners

[0063] To make the objectives, features, and advantages of the present utility model more obvious and understandable, specific embodiments of the present utility model are hereby given below, and detailed descriptions are made in conjunction with the accompanying drawings as follows.

[0064] In the specification and the claims, certain terms are used 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. The specification and the claims do not use the difference in names as a way to distinguish components, but use the difference in functions of components as the criterion for distinction. The terms "comprising" and "including" mentioned throughout the specification and the claims are open-ended terms and should be interpreted as "including but not limited to". The term "substantially" means within an acceptable error range. Those skilled in the art can solve the technical problems within a certain error range and achieve the basic technical effects. In addition, the term "coupled" in this specification includes any direct and indirect electrical connection means. Therefore, if it is described in the text that a first device is 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 through other devices or connection means.

[0065] The following disclosure provides many different embodiments or examples for implementing different features of the present case. The following disclosure describes specific examples of each component and its arrangement to simplify the description. Of course, these specific examples are not used for limitation. For example, if the specification describes that a first feature is formed on or above a second feature, it means that it may include an embodiment in which the above first feature and the above second feature are in direct contact, and may also include an embodiment in which additional features are formed between the above first feature and the above second feature, so that the above first feature and the second feature may not be in direct contact. In addition, the following different examples in the specification may reuse the same reference signs and / or marks. These repetitions are for the purpose of simplification and clarity, and are not used to limit a specific relationship between the different embodiments and / or structures discussed.

[0066] In addition, there are terms related to space. For example, "below", "beneath", "lower", "above", "higher" and similar terms are used to facilitate the description of the relationship between a component or feature in the figure and another component or feature. Except for the orientation shown in the drawings, these space-related terms are intended to include different orientations of the device in use or operation. The device may be turned to different orientations (rotated 90 degrees or other orientations), and the space-related terms used here can also be interpreted in the same way.

[0067] Figure 1FIG. is a schematic diagram showing an antenna structure 100 according to an embodiment of the present invention. The antenna structure 100 can be applied to a mobile device, such as a smart phone, a tablet computer, a notebook computer, a wireless access point, a router, or any device with communication functions. Alternatively, the antenna structure 100 can be applied to an electronic device, such as any unit in the Internet of Things (IoT).

[0068] In Figure 1 the embodiment, the antenna structure 100 includes a feeding radiation element 110, a first radiation element 120, a second radiation element 130, a third radiation element 140, a fourth radiation element 150, a fifth radiation element 160, a sixth radiation element 170, and a carrier element 180. The feeding radiation element 110, the first radiation element 120, the second radiation element 130, the third radiation element 140, the fourth radiation element 150, the fifth radiation element 160, and the sixth radiation element 170 can all be made of metal materials, such as copper, silver, aluminum, iron, or their alloys.

[0069] The feeding radiation element 110 can be generally in a straight bar shape. Specifically, the feeding radiation element 110 has a first end 111 and a second end 112, and a feeding point FP is located at the first end 111 of the feeding radiation element 110. The feeding point FP can be further coupled to a signal source 190. For example, the signal source 190 can be a radio frequency (RF) module, which can be used to excite the antenna structure 100.

[0070] The first radiating portion 120 can generally present a Z shape. Specifically, the first radiating portion 120 has a first end 121 and a second end 122, wherein the first end 121 of the first radiating portion 120 is coupled to the second end 112 of the feeding radiating portion 110, and the second end 122 of the first radiating portion 120 is an open end. In some embodiments, the first radiating portion 120 includes a first terminal widening portion 125 located at the second end 122. For example, the first terminal widening portion 125 of the first radiating portion 120 can generally present a rectangular shape.

[0071] The second radiating portion 130 can generally present an L shape. Specifically, the second radiating portion 130 has a first end 131 and a second end 132, wherein the first end 131 of the second radiating portion 130 is coupled to the second end 112 of the feeding radiating portion 110, and the second end 132 of the second radiating portion 130 is an open end. For example, both the second end 122 of the first radiating portion 120 and the second end 132 of the second radiating portion 130 can generally extend in opposite and away directions. In some embodiments, the combination of the feeding radiating portion 110, the first radiating portion 120, and the second radiating portion 130 generally presents a T shape.

[0072] The third radiating portion 140 can generally present an unequal-width L shape. Specifically, the third radiating portion 140 has a first end 141 and a second end 142, wherein the first end 141 of the third radiating portion 140 is coupled to a first grounding point GP1, and the second end 142 of the third radiating portion 140 is an open end. For example, both the second end 132 of the second radiating portion 130 and the second end 142 of the third radiating portion 140 can generally extend in the same direction. Additionally, the first grounding point GP1 can be further coupled to a ground potential VSS, wherein this ground potential VSS can be provided by a system ground plane (not shown). In some embodiments, the third radiating portion 140 is adjacent to the second radiating portion 130, and a first coupling gap GC1 can be formed between the second radiating portion 130 and the third radiating portion 140. It should be noted that the term "adjacent" or "neighboring" in this specification can mean that the distance between the corresponding two components is less than a predetermined distance (e.g., 10 mm or shorter), but generally does not include the case where the corresponding two components are in direct contact with each other (i.e., the aforementioned distance is reduced to 0).

[0073] The fourth radiating portion 150 may generally present an inverted L shape. Specifically, the fourth radiating portion 150 has a first end 151 and a second end 152. The first end 151 of the fourth radiating portion 150 is coupled to a connection point (CP) on the third radiating portion 140, and the second end 152 of the fourth radiating portion 150 is an open end. For example, the second end 132 of the second radiating portion 130 and the second end 152 of the fourth radiating portion 150 may extend in generally opposite and away directions. In some embodiments, the third radiating portion 140 and the fourth radiating portion 150 may jointly define a notch region 159, and the second end 132 of the second radiating portion 130 may further extend into this notch region 159. In some embodiments, the fourth radiating portion 150 is adjacent to the second radiating portion 130, and a second coupling gap GC2 may be formed between the second radiating portion 130 and the fourth radiating portion 150.

[0074] The fifth radiating portion 160 may generally present an irregular shape. Specifically, the fifth radiating portion 160 includes a shorting portion 163, a central portion 164, a first extension portion 165, a second extension portion 166, a third extension portion 167, and a fourth extension portion 168. Among the fifth radiating portion 160, the central portion 164 may be coupled to a second ground point GP2 via the shorting portion 163, and the first extension portion 165, the second extension portion 166, the third extension portion 167, and the fourth extension portion 168 are coupled to different positions on the central portion 164. The second ground point GP2 may be further coupled to the ground potential VSS, where the second ground point GP2 is different from the aforementioned first ground point GP1. For example, the first extension portion 165, the second extension portion 166, and the third extension portion 167 of the fifth radiating portion 160 may each generally present an unequal-width straight bar shape, and the fourth extension portion 168 of the fifth radiating portion 160 may generally present a tapered shape, but is not limited thereto. In some embodiments, the second extension portion 166 of the fifth radiating portion 160 is adjacent to the first end widened portion 125 of the first radiating portion 120, so that a third coupling gap GC3 may be formed between the first radiating portion 120 and the fifth radiating portion 160.

[0075] The sixth radiating portion 170 may generally present another straight bar with unequal widths, which may be disposed relative to the third radiating portion 140 and may be separated from the third radiating portion 140. Specifically, the sixth radiating portion 170 has a first end 171 and a second end 172, wherein the first end 171 of the sixth radiating portion 170 is coupled to a third ground point GP3, and the second end 172 of the sixth radiating portion 170 is an open end. The third ground point GP3 may be further coupled to the ground potential VSS, wherein the third ground point GP3 is different from the aforementioned first ground point GP1 and second ground point GP2. In some embodiments, the sixth radiating portion 170 includes a second end widening portion 175 at the second end 172. For example, the second end widening portion 175 of the sixth radiating portion 170 may generally present a square.

[0076] The feeding radiating portion 110, the first radiating portion 120, the second radiating portion 130, the third radiating portion 140, the fourth radiating portion 150, the fifth radiating portion 160, and the sixth radiating portion 170 may all be disposed on the same surface of the carrier assembly 180. The shape and type of the carrier assembly 180 are not particularly limited in the present invention. For example, the carrier assembly 180 may be an FR4 (Flame Retardant 4) substrate, a printed circuit board (PCB), or a flexible printed circuit (FPC). In some embodiments, the antenna structure 100 may be a planar antenna structure. However, the present invention is not limited thereto. In other embodiments, the carrier assembly 180 has a curved surface such that the antenna structure 100 may be a three-dimensional antenna structure.

[0077] Figure 2 is a graph showing the voltage standing wave ratio (VSWR) of the antenna structure 100 according to an embodiment of the present invention, wherein the horizontal axis represents the operating frequency (MHz), and the vertical axis represents the voltage standing wave ratio. According to Figure 2 the measurement results, the antenna structure 100 may cover a first frequency band FB1, a second frequency band FB2, and a third frequency band FB3. For example, the first frequency band FB1 may be between 791 MHz and 862 MHz, the second frequency band FB2 may be between 1710 MHz and 2170 MHz, and the third frequency band FB3 may be between 2500 MHz and 2690 MHz. Therefore, the antenna structure 100 will at least support the broadband operation of LTE (Long Term Evolution).

[0078] In some embodiments, the operating principle of the antenna structure 100 may be described as follows. The fifth radiation portion 160 may excite the aforementioned first frequency band FB1. The feeding radiation portion 110, the first radiation portion 120, the third radiation portion 140, and the fourth radiation portion 150 may jointly excite to generate the aforementioned second frequency band FB2. The feeding radiation portion 110, the second radiation portion 130, the fifth radiation portion 160, and the sixth radiation portion 170 may jointly excite to generate the aforementioned third frequency band FB3.

[0079] In some embodiments, the component dimensions of the antenna structure 100 may be described as follows. The total length L1 of the feeding radiation portion 110 and the first radiation portion 120 may be approximately equal to 0.25 times the wavelength (λ / 4) of the second frequency band FB2 of the antenna structure 100. The total length L2 of the feeding radiation portion 110 and the second radiation portion 130 may be approximately equal to 0.25 times the wavelength (λ / 4) of the third frequency band FB3 of the antenna structure 100. The length L3 of the third radiation portion 140 may be approximately equal to 0.25 times the wavelength (λ / 4) of the second frequency band FB2 of the antenna structure 100. The length L4 of the fourth radiation portion 150 may be approximately equal to 0.25 times the wavelength (λ / 4) of the second frequency band FB2 of the antenna structure 100. The total length L5 of the short - circuit portion 163 and the first extension portion 165 of the fifth radiation portion 160 may be approximately equal to 0.25 times the wavelength (λ / 4) of the third frequency band FB3 of the antenna structure 100. The total length L6 of the short - circuit portion 163, the central portion 164, and the second extension portion 166 of the fifth radiation portion 160 may be approximately equal to 0.125 times the wavelength (λ / 8) of the first frequency band FB1 of the antenna structure 100. The total length L7 of the short - circuit portion 163, the central portion 164, and the third extension portion 167 of the fifth radiation portion 160 may be approximately equal to 0.125 times the wavelength (λ / 8) of the first frequency band FB1 of the antenna structure 100. The length L8 of the sixth radiation portion 170 may be approximately equal to 0.25 times the wavelength (λ / 4) of the third frequency band FB3 of the antenna structure 100. The width of each of the first coupling gap GC1, the second coupling gap GC2, and the third coupling gap GC3 may be less than or equal to 1 mm. For example, the width of the first coupling gap GC1 may be between 0.5 mm and 0.9 mm, the width of the second coupling gap GC2 may be between 0.5 mm and 1 mm, and the width of the third coupling gap GC3 may be between 0.3 mm and 0.5 mm. The distance D1 between the third radiation portion 140 and the sixth radiation portion 170 may be between 8 mm and 10 mm. The above ranges of component dimensions are obtained based on the results of multiple experiments, which help to optimize the operational bandwidth and impedance matching of the antenna structure 100.

[0080] In some embodiments, the first ground point GP1 is coupled to the ground potential VSS, the second ground point GP2 is coupled to a first Specific Absorption Rate (SAR) sensor (not shown), and the third ground point GP3 is coupled to a second SAR sensor (not shown). Since each SAR sensor can be regarded as a radio frequency ground point, the antenna structure 100 can also support the dual functions of wireless communication and SAR detection without additional increase in the overall size.

[0081] The present utility model provides a novel antenna structure. Compared with traditional designs, the present utility model has at least the advantages of small size, wide bandwidth, and reduced manufacturing cost, so it is very suitable for various mobile communication devices or the Internet of Things.

[0082] It should be noted that the above-mentioned component sizes, component shapes, and frequency ranges are not limitations of the present utility model. The antenna designer can adjust these set values according to different needs. The antenna structure of the present utility model is not limited to Figure 1-2 the state shown in the figures. The present utility model may only include Figure 1-2 any one or more features of any one or more of the embodiments. In other words, not all the features shown in the figures need to be implemented in the antenna structure of the present utility model at the same time.

[0083] In this specification and the claims, ordinal numbers such as "first", "second", "third", etc. do not have a sequential relationship with each other, and are only used to label and distinguish two different components with the same name.

[0084] Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be defined by the claims.

Claims

1. An antenna structure, characterized in that, Comprising: A feeding radiation part having a feeding point; A first radiation part coupled to the feeding radiation part; A second radiation part coupled to the feeding radiation part, wherein the first radiation part and the second radiation part extend substantially in opposite directions; A third radiation part coupled to a first grounding point; A fourth radiation part coupled to the third radiation part, wherein both the third radiation part and the fourth radiation part are adjacent to the second radiation part; A fifth radiation part coupled to a second grounding point, wherein the fifth radiation part is adjacent to the first radiation part; A sixth radiation part coupled to a third grounding point, wherein the sixth radiation part is disposed relative to the third radiation part; and A carrier assembly, wherein the feeding radiation part, the first radiation part, the second radiation part, the third radiation part, the fourth radiation part, the fifth radiation part, and the sixth radiation part are all disposed on the carrier assembly.

2. The antenna structure according to claim 1, wherein The first radiation part includes a first end widening portion, and the sixth radiation part includes a second end widening portion.

3. The antenna structure according to claim 1, characterized in that, The fifth radiation part includes a short - circuit portion, a central portion, a first extending portion, a second extending portion, a third extending portion, and a fourth extending portion. The central portion is coupled to the second grounding point via the short - circuit portion, and the first extending portion, the second extending portion, the third extending portion, and the fourth extending portion are all coupled to the central portion.

4. The antenna structure according to claim 1, characterized in that, A first coupling gap is formed between the second radiation part and the third radiation part, a second coupling gap is formed between the second radiation part and the fourth radiation part, a third coupling gap is formed between the first radiation part and the fifth radiation part, and the width of each of the first coupling gap, the second coupling gap, and the third coupling gap is less than or equal to 1 mm.

5. The antenna structure according to claim 1, wherein, The distance between the third radiation part and the sixth radiation part is between 8 mm and 10 mm.

6. The antenna structure according to claim 1, characterized in that, The antenna structure covers a first frequency band, a second frequency band, and a third frequency band. The first frequency band is between 791 MHz and 862 MHz, the second frequency band is between 1710 MHz and 2170 MHz, and the third frequency band is between 2500 MHz and 2690 MHz.

7. The antenna structure according to claim 6, wherein The total length of the feeding radiation part and the first radiation part is approximately equal to 0.25 times the wavelength of the second frequency band.

8. The antenna structure according to claim 6, wherein The total length of the feeding radiation part and the second radiation part is approximately equal to 0.25 times the wavelength of the third frequency band.

9. The antenna structure according to claim 6, wherein The length of each of the third radiation part and the fourth radiation part is approximately equal to 0.25 times the wavelength of the second frequency band.

10. The antenna structure according to claim 6, characterized in that, The length of the sixth radiation part is approximately equal to 0.25 times the wavelength of the third frequency band.

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