Antenna structure

Abstract

This invention provides an antenna structure, comprising: a first radiating part, a second radiating part, a third radiating part, and a carrier assembly. The first radiating part has a feed point. The second radiating part is coupled to a ground potential and is adjacent to the first radiating part, wherein the second radiating part can extend substantially along the first radiating part. The third radiating part is coupled to the first radiating part. The first, second, and third radiating parts are all disposed on the carrier assembly.

Description

Technical Field

[0001] This utility model relates to an antenna structure, and more particularly to an antenna structure having a wideband. Background Technology

[0002] With the advancement of mobile communication technology, mobile devices have become increasingly common in recent years, such as laptops, mobile phones, multimedia players, and other portable electronic devices with multiple functions. To meet people's needs, mobile devices typically have wireless communication capabilities. Some cover long-range wireless communication, such as mobile phones using 2G, 3G, and LTE (Long Term Evolution) systems and their respective frequency bands of 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz, and 2500MHz. Others cover short-range wireless communication, such as Wi-Fi and Bluetooth systems using the 2.4GHz, 5.2GHz, and 5.8GHz frequency bands.

[0003] Antennas are indispensable components in wireless communication. If the operating bandwidth of an antenna used for receiving or transmitting signals is too narrow, it can easily lead to a degradation in the communication quality of mobile devices. Therefore, designing a small-size, wide-bandwidth antenna structure is an important task for designers. Utility Model Content

[0004] In a preferred embodiment, the present invention provides an antenna structure comprising: a first radiating portion having a feed point; a second radiating portion coupled to a ground potential and adjacent to the first radiating portion, wherein the second radiating portion extends substantially along the first radiating portion; a third radiating portion coupled to the first radiating portion; and a carrier assembly, wherein the first radiating portion, the second radiating portion, and the third radiating portion are all disposed on the carrier assembly.

[0005] In some embodiments, the first radiating portion is in the form of a first zigzag shape, the second radiating portion is in the form of a second zigzag shape, and the length of the second radiating portion is greater than the length of the first radiating portion.

[0006] In some embodiments, the first radiating portion includes a first segment, a second segment, a third segment, a fourth segment, and a fifth segment. The first segment and the second segment have a first included angle, the second segment and the third segment have a second included angle, the third segment and the fourth segment have a third included angle, and the fourth segment and the fifth segment have a fourth included angle.

[0007] In some embodiments, the first included angle is a right angle, while each of the second included angle, the third included angle, and the fourth included angle is an obtuse angle.

[0008] In some embodiments, the second radiating portion includes a sixth segment, a seventh segment, an eighth segment, a ninth segment, a tenth segment, and an eleventh segment, wherein the sixth segment and the seventh segment have a fifth included angle, the seventh segment and the eighth segment have a sixth included angle, the eighth segment and the ninth segment have a seventh included angle, the ninth segment and the tenth segment have an eighth included angle, and the tenth segment and the eleventh segment have a ninth included angle.

[0009] In some embodiments, the fifth included angle is a right angle, while each of the sixth included angle, the seventh included angle, the eighth included angle, and the ninth included angle is an obtuse angle.

[0010] In some embodiments, a first coupling gap is formed between the first segment and the sixth segment, a second coupling gap is formed between the third segment and the eighth segment, and a third coupling gap is formed between the fifth segment and the eleventh segment.

[0011] In some embodiments, the antenna structure covers a first frequency band and a second frequency band, the first frequency band being between 700MHz and 960MHz, and the second frequency band being between 1900MHz and 2170MHz.

[0012] In some embodiments, the length of the first radiating portion is approximately equal to 0.25 times the wavelength of the highest frequency of the first frequency band.

[0013] In some embodiments, the length of the second radiating portion is approximately equal to 0.25 times the wavelength of the lowest frequency of the first frequency band. Attached Figure Description

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

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

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

[0017] Figure label:

[0018] 100: Antenna Structure

[0019] 110: First Radiation Section

[0020] 111: The first end of the first radiating section

[0021] 112: The second end of the first radiating section

[0022] 113: First Section

[0023] 114: Second Section

[0024] 115: Third Section

[0025] 116: Fourth Section

[0026] 117: Fifth Section

[0027] 119: First smooth gap

[0028] 120: Second Radiation Section

[0029] 121: The first end of the second radiating section

[0030] 122: The second end of the second radiating section

[0031] 123: Sixth Section

[0032] 124: Section 7

[0033] 125: Section 8

[0034] 126: Ninth Section

[0035] 127: Section 10

[0036] 128: Section 11

[0037] 129: Second smooth gap

[0038] 130: Third Radiation Section

[0039] 131: The first end of the third radiating section

[0040] 132: The second end of the third radiating section

[0041] 170: Carrier Component

[0042] 190: Signal Source

[0043] CP: Connection Point

[0044] FB1: First Band

[0045] FB2: Second Band

[0046] FP: Feed Point

[0047] GC1: First coupling gap

[0048] GC2: Second coupling gap

[0049] GC3: Third coupling gap

[0050] L1, L2, L3: Length

[0051] PA: Resonance Path

[0052] R1, R2: Radius of curvature

[0053] VSS: Grounding Potential

[0054] W1, W2, W3: Width

[0055] θ1: First included angle

[0056] θ2: Second included angle

[0057] θ3: Third included angle

[0058] θ4: Fourth included angle

[0059] θ5: Fifth included angle

[0060] θ6: Sixth included angle

[0061] θ7: Seventh included angle

[0062] θ8: Eighth included angle

[0063] θ9: Ninth included angle

[0064] θS: Specific included angle Detailed Implementation

[0065] To make the objectives, features and advantages of this utility model more apparent and understandable, specific embodiments of this utility model are described below in conjunction with the accompanying drawings for detailed explanation.

[0066] Certain terms are used in this specification and the claims to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and the claims do not distinguish components by differences in name, but by differences in function. The terms "comprising" and "including" used throughout this specification and the claims are open-ended and should be interpreted as "including but not limited to". The term "generally" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and achieve the basic technical effect within a certain margin of error. Furthermore, the term "coupled" in this specification includes any direct and indirect electrical connection means. Therefore, if a first device is described as 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.

[0067] The following disclosure provides many different embodiments or examples to implement the various features of this invention. The following disclosure describes specific examples of the various components and their arrangements for simplification. 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 indicates that it may include embodiments where the first and second features are in direct contact, or embodiments where an additional feature is formed between the first and second features, so that the first and second features may not be in direct contact. Furthermore, the same reference numerals and / or designations may be repeated in different examples of the following specification. These repetitions are for simplification and clarity and are not intended to limit any specific relationship between the different embodiments and / or structures discussed.

[0068] Furthermore, spatially related terms, such as "below," "below," "lower," "above," "higher," and similar terms, are used to facilitate the description of the relationship between one component or feature in the icon and another component or feature(s). In addition to the orientations shown in the accompanying drawings, these spatially related terms are intended to encompass different orientations of the device in use or operation. The device may be rotated to different orientations (90 degrees or other orientations), and the spatially related terms used herein can be interpreted in the same way.

[0069] Figure 1This is a schematic diagram showing an antenna structure 100 according to an embodiment of the present invention. The antenna structure 100 can be incorporated into a mobile device, such as a smartphone, tablet computer, notebook computer, wireless access point, router, or any device with communication capabilities. Alternatively, the antenna structure 100 can be incorporated into an electronic device, such as any unit in an Internet of Things (IoT) system.

[0070] exist Figure 1 In one embodiment, the antenna structure 100 includes a first radiating element 110, a second radiating element 120, a third radiating element 130, and a carrier element 170, wherein the first radiating element 110, the second radiating element 120, and the third radiating element 130 can all be made of metal, such as copper, silver, aluminum, iron, or their alloys.

[0071] The first radiating section 110 can generally present a first polyline shape. Specifically, the first radiating section 110 has a first end 111 and a second end 112, wherein a feeding point FP is located at the first end 111 of the first radiating section 110, and the second end 112 of the first radiating section 110 is an open end. The feeding point FP can be 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.

[0072] In some embodiments, the first radiating portion 110 includes a first segment 113, a second segment 114, a third segment 115, a fourth segment 116, and a fifth segment 117, wherein a first angle θ1 is formed between the first segment 113 and the second segment 114, a second angle θ2 is formed between the second segment 114 and the third segment 115, a third angle θ3 is formed between the third segment 115 and the fourth segment 116, and a fourth angle θ4 is formed between the fourth segment 116 and the fifth segment 117. For example, the first angle θ1 may be a right angle, and each of the second angle θ2, the third angle θ3, and the fourth angle θ4 may be an obtuse angle.

[0073] In some embodiments, the fifth segment 117 has a first smooth notch 119. For example, the first smooth notch 119 may be generally semi-circular and may have a radius of curvature R1, but is not limited thereto.

[0074] The second radiating portion 120 may generally present a second zigzag shape, adjacent to the first radiating portion 110. Furthermore, the second radiating portion 120 may extend generally along the first radiating portion 110. Specifically, the second radiating portion 120 has a first end 121 and a second end 122, wherein the first end 121 of the second radiating portion 120 is coupled to a ground voltage VSS, and the second end 122 of the second radiating portion 120 is an open-circuit end. For example, the length L2 of the second radiating portion 120 may be slightly greater than the length L1 of the first radiating portion 110, wherein the first end 121 of the second radiating portion 120 may be aligned with the first end 111 of the first radiating portion 110, and the second end 122 of the second radiating portion 120 may also be aligned with the second end 112 of the first radiating portion 110. It should be noted that the terms “adjacent” or “adjacent” in this specification may refer to a distance between two corresponding components that is less than a predetermined distance (e.g., 10 mm or less), but generally do not include cases where the two corresponding components are in direct contact with each other (i.e., the aforementioned distance is reduced to 0).

[0075] The second radiating section 120 includes a sixth segment 123, a seventh segment 124, an eighth segment 125, a ninth segment 126, a tenth segment 127, and an eleventh segment 128. A fifth angle θ5 exists between the sixth segment 123 and the seventh segment 124; a sixth angle θ6 exists between the seventh segment 124 and the eighth segment 125; a seventh angle θ7 exists between the eighth segment 125 and the ninth segment 126; an eighth angle θ8 exists between the ninth segment 126 and the tenth segment 127; and a ninth angle θ9 exists between the tenth segment 127 and the eleventh segment 128. For example, the fifth angle θ5 can be a right angle, and each of the sixth, seventh, eighth, and ninth angles θ6 and θ7 can be an obtuse angle. Furthermore, the eighth angle θ8 can be the largest of all the aforementioned angles.

[0076] In some embodiments, the eleventh segment 128 has a second smooth notch 129. For example, the second smooth notch 129 may be generally semi-circular, having a radius of curvature R2, but is not limited thereto. The second smooth notch 129 may be configured facing the first smooth notch 119, wherein the first smooth notch 119 and the second smooth notch 129 may be used to receive a mechanical positioning pillar (not shown). Furthermore, the radius of curvature R2 of the second smooth notch 129 may also be generally equivalent to the radius of curvature R1 of the first smooth notch 119.

[0077] In some embodiments, a first coupling gap GC1 may be formed between the first segment 113 and the sixth segment 123, a second coupling gap GC2 may be formed between the third segment 115 and the eighth segment 125, and a third coupling gap GC3 may be formed between the fifth segment 117 and the eleventh segment 128. For example, the second coupling gap GC2 may have a maximum width, and the width of the third coupling gap GC3 may be approximately equal to the width of the first coupling gap GC1, but is not limited thereto.

[0078] The third radiating section 130 can be generally straight. Specifically, the third radiating section 130 has a first end 131 and a second end 132, wherein the first end 131 of the third radiating section 130 is a connection point CP coupled to a third segment 115 of the first radiating section 110, and the second end 132 of the third radiating section 130 is an open-circuit end. For example, a specific angle θS may exist between the third segment 115 and the third radiating section 130, wherein this specific angle θS may be an acute angle. In some embodiments, a resonant path PA can be formed from the feed point FP through the connection point CP to the second end 132 of the third radiating section 130. That is, this resonant path PA may be composed of the first segment 113, the second segment 114, the lower half of the third segment 115, and the third radiating section 130.

[0079] The first radiating portion 110, the second radiating portion 120, and the third radiating portion 130 can all be disposed on the same surface of the carrier assembly 170. The shape and type of the carrier assembly 170 are not particularly limited in this invention. For example, the carrier assembly 170 can 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 can be a planar antenna structure.

[0080] Figure 2 This is a voltage standing wave ratio (VSWR) graph showing the antenna structure 100 according to an embodiment of the present invention, where the horizontal axis represents the operating frequency (MHz) and the vertical axis represents the voltage standing wave ratio. Figure 2 Based on the measurement results, antenna structure 100 can cover a first frequency band FB1 and a second frequency band FB2. For example, the first frequency band FB1 can be between 700MHz and 960MHz, while the second frequency band FB2 can be between 1900MHz and 2170MHz. Therefore, antenna structure 100 will at least support broadband operation of LTE (Long Term Evolution).

[0081] In some embodiments, the operating principle of the antenna structure 100 may be as follows. The second radiating element 120 may be coupled and excited by the first radiating element 110 to generate the aforementioned first frequency band FB1. The resonant path PA may be excited to generate the aforementioned second frequency band FB2. According to actual measurements, the first coupling gap GC1 and the third coupling gap GC3 have relatively small widths, which can be used to fine-tune the impedance matching of the aforementioned second frequency band FB2. Additionally, the second coupling gap GC2 has a relatively large width, which can be used to fine-tune the impedance matching of the aforementioned first frequency band FB1. It should be noted that the zigzag shape and adjacent configuration of the first radiating element 110 and the second radiating element 120 also contribute to miniaturizing the overall size of the antenna structure 100.

[0082] In some embodiments, the component dimensions of the antenna structure 100 may be as described below. The length L1 of the first radiating portion 110 may be approximately equal to 0.25 times the wavelength (λ / 4) of the highest frequency (e.g., approximately 960 MHz) of the first frequency band FB1 of the antenna structure 100. The width W1 of the first radiating portion 110 may be between 2 mm and 4 mm. The length L2 of the second radiating portion 120 may be approximately equal to 0.25 times the wavelength (λ / 4) of the lowest frequency (e.g., approximately 700 MHz) of the first frequency band FB1 of the antenna structure 100. The width W2 of the second radiating portion 120 may be between 2 mm and 4 mm. The length L3 of the third radiating portion 130 may be less than or equal to 0.0625 times the wavelength (λ / 16) of the lowest frequency (e.g., approximately 1900 MHz) of the second frequency band FB2 of the antenna structure 100. The width W3 of the third radiating portion 130 may be between 2 mm and 4 mm. The length of the resonant path PA can be approximately equal to 0.25 times the wavelength (λ / 4) of the lowest frequency of the second band FB2 of antenna structure 100. The width of the first coupling gap GC1 can be between 0.5 mm and 1 mm. The width of the second coupling gap GC2 can be between 1.5 mm and 2.5 mm. The width of the third coupling gap GC3 can be between 0.5 mm and 1.5 mm. The first included angle θ1 can be approximately 90 degrees. The second included angle θ2 can be between 100 degrees and 120 degrees. The third included angle θ3 can be between 130 degrees and 160 degrees. The fourth included angle θ4 can be between 130 degrees and 150 degrees. The fifth included angle θ5 can be approximately 90 degrees. The sixth included angle θ6 can be approximately equal to the second included angle θ2. The seventh included angle θ7 can be approximately equal to the third included angle θ3. The eighth included angle θ8 can be between 160 degrees and 175 degrees. The ninth included angle θ9 can be between 150 degrees and 170 degrees. The specific included angle θS can be between 70 and 80 degrees, for example, approximately 75 degrees. The radius of curvature R1 of the first smooth notch 119 can be between 0.25 mm and 0.75 mm, for example, approximately 0.5 mm. The radius of curvature R2 of the second smooth notch 129 can be between 0.25 mm and 0.75 mm, for example, approximately 0.5 mm. The above component size ranges are derived from multiple experimental results, which help optimize the operating bandwidth and impedance matching of the antenna structure 100, while maximizing the radiation efficiency of the antenna structure 100.

[0083] In some embodiments, the aforementioned antenna structure 100 can be applied to a point-of-sale (POS) system (not shown). Since the POS system includes the aforementioned antenna structure 100, it will be able to support wireless communication functionality. In some embodiments, the POS system further includes a radio frequency (RF) circuit, a filter, an amplifier, a processor, and / or a housing, but is not limited thereto.

[0084] This invention proposes a novel antenna structure. Compared with traditional designs, this invention has advantages such as small size, wide bandwidth, high coupling, and low manufacturing cost, making it well-suited for various mobile communication devices or the Internet of Things.

[0085] It is worth noting that the component dimensions, shapes, and frequency ranges described above are not limiting conditions of this invention. Antenna designers can adjust these settings according to different needs. The antenna structure of this invention is not limited to the state illustrated in Figures 1-2. This invention may include only any one or more features of any one or more embodiments shown in Figures 1-2. In other words, not all features shown in the figures need to be implemented simultaneously in the antenna structure of this invention.

[0086] The ordinal numbers in this specification and the claims, such as "first", "second", "third", etc., are not sequential in any particular order; they are only used to distinguish between two different components with the same name.

[0087] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. An antenna structure, characterized in that, include: A first radiating section has a feed point; A second radiating portion is coupled to a ground potential and is adjacent to the first radiating portion, wherein the second radiating portion extends substantially along the first radiating portion; A third radiating section, coupled to the first radiating section; and A carrier assembly, wherein the first radiating part, the second radiating part, and the third radiating part are all disposed on the carrier assembly.

2. The antenna structure as described in claim 1, characterized in that, The first radiating part has a first zigzag shape, the second radiating part has a second zigzag shape, and the length of the second radiating part is greater than the length of the first radiating part.

3. The antenna structure as described in claim 1, characterized in that, The first radiating part includes a first segment, a second segment, a third segment, a fourth segment, and a fifth segment. The first segment and the second segment have a first included angle, the second segment and the third segment have a second included angle, the third segment and the fourth segment have a third included angle, and the fourth segment and the fifth segment have a fourth included angle.

4. The antenna structure as described in claim 3, characterized in that, The first included angle is a right angle, while each of the second included angle, the third included angle, and the fourth included angle is an obtuse angle.

5. The antenna structure as described in claim 3, characterized in that, The second radiating section includes a sixth segment, a seventh segment, an eighth segment, a ninth segment, a tenth segment, and an eleventh segment. The sixth segment and the seventh segment have a fifth included angle, the seventh segment and the eighth segment have a sixth included angle, the eighth segment and the ninth segment have a seventh included angle, the ninth segment and the tenth segment have an eighth included angle, and the tenth segment and the eleventh segment have a ninth included angle.

6. The antenna structure as described in claim 5, characterized in that, The fifth included angle is a right angle, while each of the sixth, seventh, eighth, and ninth included angles is an obtuse angle.

7. The antenna structure as described in claim 5, characterized in that, A first coupling gap is formed between the first segment and the sixth segment, a second coupling gap is formed between the third segment and the eighth segment, and a third coupling gap is formed between the fifth segment and the eleventh segment.

8. The antenna structure as described in claim 1, characterized in that, The antenna structure covers a first frequency band and a second frequency band, the first frequency band being between 700MHz and 960MHz, and the second frequency band being between 1900MHz and 2170MHz.

9. The antenna structure as described in claim 8, characterized in that, The length of the first radiating element is approximately equal to 0.25 times the wavelength of the highest frequency of the first frequency band.

10. The antenna structure as described in claim 8, characterized in that, The length of the second radiating element is approximately equal to 0.25 times the wavelength of the lowest frequency of the first frequency band.

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