Antenna structure

Abstract

An antenna structure comprises a feed-in radiation part, a first radiation part, a second radiation part, an extension radiation part and a dielectric substrate. The feed-in radiation part is provided with a feed-in point. The first radiation portion is coupled to a ground potential, wherein the first radiation portion is adjacent to the feed-in radiation portion. The second radiation portion is coupled to a ground potential, wherein the second radiation portion is adjacent to the feed-in radiation portion. The extension radiation part is coupled to the first radiation part, wherein the feed-in radiation part and the second radiation part are at least partially surrounded by the first radiation part. The feed-in radiation part, the first radiation part, the second radiation part and the extension radiation part are all arranged on the dielectric substrate.

Description

Technical Field

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

[0002] With the development of mobile communication technology, mobile devices have become increasingly popular in recent years, such as laptops, mobile phones, multimedia players and other 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. Utility Model Content

[0004] In a preferred embodiment, the utility model provides an antenna structure, including: a feed radiating portion having a feed point; a first radiating portion coupled to a ground potential, wherein the first radiating portion is adjacent to the feed radiating portion; a second radiating portion coupled to the ground potential, wherein the second radiating portion is adjacent to the feed radiating portion; an extended radiating portion coupled to the first radiating portion, wherein the feed radiating portion and the second radiating portion are both at least partially surrounded by the first radiating portion; and a dielectric substrate, wherein the feed radiating portion, the first radiating portion, the second radiating portion, and the extended radiating portion are all disposed on the dielectric substrate.

[0005] In some embodiments, the feed radiation portion is in a longer L-shape, the first radiation portion is in a meandering shape, the second radiation portion is in a shorter L-shape, and the extended radiation portion is in a rectangular shape.

[0006] In some embodiments, the feeding radiation portion is disposed between the first radiation portion and the second radiation portion.

[0007] In some embodiments, a first coupling gap is formed between the first radiating portion and the feeding radiating portion, a second coupling gap is formed between the second radiating portion and the feeding radiating portion, and a width of the second coupling gap is greater than a width of the first coupling gap.

[0008] In some embodiments, the first radiating portion includes a U-shaped section.

[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 700 MHz and 800 MHz, the second frequency band is between 1710 MHz and 1920 MHz, and the third frequency band is between 1920 MHz and 2170 MHz.

[0010] In some embodiments, the length of the feeding radiation portion is substantially equal to 0.25 times the wavelength of the second frequency band.

[0011] In some embodiments, the length of the first radiating portion is substantially equal to 0.25 times the wavelength of the first frequency band.

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

[0013] In some embodiments, the length of the U-shaped segment is substantially equal to 0.5 times the wavelength of the third frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram showing an antenna structure according to an embodiment of the present invention.

[0015] Figure 2 The figure shows the voltage standing wave ratio of the antenna structure according to one embodiment of the present invention.

[0016] Description of Reference Numerals

[0017] 100: Antenna structure

[0018] 110: Feed radiation part

[0019] 111: first end of the feed radiation part

[0020] 112: Feed into the second end of the radiation portion

[0021] 120: First radiation part

[0022] 121: first end of the first radiation portion

[0023] 122: second end of the first radiation portion

[0024] 125: U-shaped section of the first radiation portion

[0025] 126: Open side of the U-shaped section

[0026] 130: Second radiation part

[0027] 131: first end of the second radiation portion

[0028] 132: second end of the second radiation portion

[0029] 140: Extended radiation part

[0030] 141: first end of the extended radiation portion

[0031] 142: The second end of the extended radiation portion

[0032] 150: Dielectric substrate

[0033] 190:Signal source

[0034] CP: Connection Point

[0035] FB1: First frequency band

[0036] FB2: Second frequency band

[0037] FB3: The third frequency band

[0038] FP: Feed Point

[0039] GC1: First coupling gap

[0040] GC2: Second coupling gap

[0041] L1, L2, L3, L4, L5: Length

[0042] W1,W2,W3,W4,W5: Width

[0043] VSS: Ground potential DETAILED DESCRIPTION

[0044] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the following specifically lists the specific embodiments of the present invention and describes them in detail with reference to the accompanying drawings.

[0045] 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. This 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 "include" and "comprise" mentioned throughout the specification and claims are open-ended terms and should be interpreted as "include 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.

[0046] 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 the present disclosure describes a first feature formed on or above a second feature, it means that it may include an embodiment in which the first feature and the second feature are in direct contact, and may also include an embodiment in which an additional feature is formed between the first feature and the second feature, so that the first feature and the second feature may not be in direct contact. In addition, the same reference symbols and / or marks may be reused in different examples of the following disclosure. These repetitions are for the purpose of simplification and clarity, and are not intended to limit the specific relationship between the different embodiments and / or structures discussed.

[0047] In addition, spatially relative terms such as "below," "below," "lower," "above," "higher," and similar terms are used to facilitate description of the relationship between one element or feature and another element or features in the drawings. In addition to the orientation shown in the drawings, these spatially relative 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 spatially relative terms used herein may be interpreted accordingly.

[0048] Figure 1The figure shows 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 function. Alternatively, the antenna structure 100 can be applied to an electronic device, such as any unit in the Internet of Things (IOT).

[0049] exist Figure 1 In the embodiment of the present invention, the antenna structure 100 includes: a feeding radiation element 110, a first radiation element 120, a second radiation element 130, an extension radiation element 140, and a dielectric substrate 150, wherein the feeding radiation element 110, the first radiation element 120, the second radiation element 130, and the extension radiation element 140 can all be made of metal materials, such as: copper, silver, aluminum, iron, or alloys thereof.

[0050] The feeding radiation portion 110 can be roughly in a long L shape. In detail, the feeding radiation portion 110 has a first end 111 and a second end 112, wherein a feeding point (Feeding Point) FP is located at the first end 111 of the feeding radiation portion 110, and the second end 112 of the feeding radiation portion 110 is an open end (Open End). The feeding point FP can be further coupled to a signal source (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. In some embodiments, the feeding radiation portion 110 is disposed between the first radiation portion 120 and the second radiation portion 130.

[0051] The first radiating portion 120 may be substantially in a meandering shape, wherein the feed radiating portion 110 and the second radiating portion 130 may be at least partially surrounded by the first radiating portion 120. In detail, 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 a ground potential VSS, and the second end 122 of the first radiating portion 120 is an open end. For example, the ground potential VSS may be provided by a system ground plane of the antenna structure 100 (not shown). In addition, the second end 122 of the first radiating portion 120 may be substantially aligned with the second end 112 of the feed radiating portion 110. In some embodiments, the first radiating portion 120 includes a U-shaped segment 125 located at the second end 122, wherein the U-shaped segment 125 has an open side 126. In some embodiments, the first radiating portion 120 is adjacent to the feeding radiating portion 110, so that a first coupling gap GC1 is formed between the first radiating portion 120 and the feeding radiating portion 110. It should be noted that the term "adjacent" or "adjacent" in this specification may refer to a distance between two corresponding elements being less than a predetermined distance (e.g., 10 mm or shorter), but generally does not include a situation where two corresponding elements are in direct contact with each other (i.e., the aforementioned distance is shortened to 0).

[0052] The second radiating portion 130 may be substantially in a shorter L-shape (compared to the feeding radiating portion 110). In detail, 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 ground potential VSS, and the second end 132 of the second radiating portion 130 is an open end. The second end 132 of the second radiating portion 130 and the second end 112 of the feeding radiating portion 110 may extend substantially in the same direction. In addition, the second end 132 of the second radiating portion 130 and the second end 122 of the first radiating portion 120 may extend substantially in opposite directions. In some embodiments, the second radiating portion 130 is adjacent to the feeding radiating portion 110, so that a second coupling gap GC2 may be formed between the second radiating portion 130 and the feeding radiating portion 110. For example, the width of the second coupling gap GC2 may be greater than the width of the first coupling gap GC1.

[0053] The extended radiating portion 140 may be substantially rectangular. Specifically, the extended radiating portion 140 has a first end 141 and a second end 142, wherein the first end 141 of the extended radiating portion 140 is coupled to a connection point CP on the first radiating portion 120, and the second end 142 of the extended radiating portion 140 is an open end. For example, the second end 142 of the extended radiating portion 140 and the second end 112 of the feed radiating portion 110 may extend substantially in opposite directions and away from each other. In some embodiments, the aforementioned connection point CP is adjacent to the first end 121 of the first radiating portion 120.

[0054] The feed radiation portion 110, the first radiation portion 120, the second radiation portion 130, and the extension radiation portion 140 can all be disposed on the same surface of the dielectric substrate 150. The shape and type of the dielectric substrate 150 are not particularly limited in the present invention. For example, the dielectric substrate 150 can be a FR4 (Flame Retardant 4) substrate, a printed circuit board (PCB), or a flexible printed circuit (FPC). In some embodiments, the antenna structure 100 can be a planar antenna structure. However, in other embodiments, the antenna structure 100 can also be changed to a three-dimensional antenna structure.

[0055] Figure 2 The figure shows 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. Figure 2 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 700MHz and 800MHz, the second frequency band FB2 can be between 1710MHz and 1920MHz, and the third frequency band FB3 can be between 1920MHz and 2170MHz. Therefore, the antenna structure 100 can at least support the broadband operation of LTE (Long Term Evolution).

[0056] In some embodiments, the operating principle of the antenna structure 100 may be as described below. The feed radiating portion 110 may be excited to generate the aforementioned second frequency band FB2. The first radiating portion 120 may be coupled and excited by the feed radiating portion 110 to generate the aforementioned first frequency band FB1. The second radiating portion 130 may be coupled and excited by the feed radiating portion 110 to generate the aforementioned third frequency band FB3. According to actual measurement results, the extended radiating portion 140 may be used to fine-tune the impedance matching (Impedance Matching) of the aforementioned second frequency band FB2, and the U-shaped section 125 of the first radiating portion 120 may be used to increase the operational bandwidth (Operational Bandwidth) of the aforementioned third frequency band FB3.

[0057] In some embodiments, the element dimensions of the antenna structure 100 may be as described below. The length L1 of the feed radiating portion 110 may be approximately equal to 0.25 times the wavelength (λ / 4) of the second frequency band FB2 of the antenna structure 100. The width W1 of the feed radiating portion 110 may be between 0.5 mm and 1.5 mm. The length L2 of the first radiating portion 120 may be approximately equal to 0.25 times the wavelength (λ / 4) of the first frequency band FB1 of the antenna structure 100. The width W2 of the first radiating portion 120 may be between 0.5 mm and 1.5 mm. The length L3 of the second radiating 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 width W3 of the second radiating portion 130 may be between 0.5 mm and 1.5 mm. In the first radiating portion 120, the length L4 of the U-shaped section 125 thereof may be substantially equal to 0.5 times the wavelength (λ / 2) of the third frequency band FB3 of the antenna structure 100, and the width W4 of the opening side 126 of the U-shaped section 125 may be between 4 mm and 6 mm. The length L5 of the extended radiating portion 140 may be between 16 mm and 24 mm, for example, about 20 mm. The width W5 of the extended radiating portion 140 may be between 5 mm and 9 mm, for example, about 7 mm. The width of the first coupling gap GC1 may be less than or equal to 1 mm, for example, about 0.5 mm. The width of the second coupling gap GC2 may be less than or equal to 2 mm, for example, about 0.9 mm. The above ranges of component sizes are obtained based on multiple experimental results, which help to optimize the operating bandwidth and impedance matching of the antenna structure 100.

[0058] In some embodiments, the antenna structure 100 described above can be applied to a point of sale (POS) system (not shown). Since the POS system includes the antenna structure 100 described above, the POS system can support the function of wireless communication. In some embodiments, the POS system further includes an RF circuit, a filter, an amplifier, a processor, or (and) a housing, but is not limited thereto.

[0059] The utility model proposes a novel antenna structure. Compared with the traditional design, the utility model has at least the advantages of small size, wide bandwidth, and low manufacturing cost, so it is very suitable for application in various mobile communication devices or the Internet of Things.

[0060] It is worth noting that the above-mentioned component size, component shape, and frequency range are not limiting conditions of the present invention. Antenna designers can adjust these settings according to different needs. The antenna structure of the present invention is not limited to Figure 1-2 The utility model may only include Figure 1-2 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.

[0061] 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.

[0062] Although the present invention is disclosed as above with reference to the preferred embodiments, it is not intended to limit the scope of the present invention. Anyone skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the following claims.

Claims

1. An antenna structure, It is characterized in that include: A feeding radiation portion having a feeding point; a first radiating portion coupled to a ground potential, wherein the first radiating portion is adjacent to the feeding radiating portion; a second radiating portion coupled to the ground potential, wherein the second radiating portion is adjacent to the feeding radiating portion; an extended radiation portion coupled to the first radiation portion, wherein the feed radiation portion and the second radiation portion are at least partially surrounded by the first radiation portion; and A dielectric substrate, wherein the feeding radiation part, the first radiation part, the second radiation part, and the extended radiation part are all disposed on the dielectric substrate.

2. The antenna structure according to claim 1, It is characterized in that The feeding radiation part presents a longer L-shape, the first radiation part presents a meandering shape, the second radiation part presents a shorter L-shape, and the extending radiation part presents a rectangle.

3. The antenna structure according to claim 1, It is characterized in that The feeding radiation part is arranged between the first radiation part and the second radiation part.

4. The antenna structure according to claim 1, It is characterized in that A first coupling gap is formed between the first radiating portion and the feeding radiating portion, a second coupling gap is formed between the second radiating portion and the feeding radiating portion, and a width of the second coupling gap is greater than a width of the first coupling gap.

5. The antenna structure according to claim 1, It is characterized in that The first radiating portion includes a U-shaped section.

6. The antenna structure according to claim 5, It is characterized in that The antenna structure covers a first frequency band, a second frequency band, and a third frequency band, wherein the first frequency band is between 700 MHz and 800 MHz, the second frequency band is between 1710 MHz and 1920 MHz, and the third frequency band is between 1920 MHz and 2170 MHz.

7. The antenna structure according to claim 6, It is characterized in that The length of the feeding radiation portion is substantially equal to 0.25 times the wavelength of the second frequency band.

8. The antenna structure according to claim 6, It is characterized in that The length of the first radiation portion is substantially equal to 0.25 times the wavelength of the first frequency band.

9. The antenna structure according to claim 6, It is characterized in that The length of the second radiation portion is substantially equal to 0.25 times the wavelength of the third frequency band.

10. The antenna structure according to claim 6, It is characterized in that The length of the U-shaped section is substantially equal to 0.5 times the wavelength of the third frequency band.

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