Antenna structure

Abstract

An antenna structure. The antenna structure comprises a first ground element, a second ground element, a first radiation part, a second radiation part, a third radiation part, a fourth radiation part, a fifth radiation part and a first capacitor; the first radiation part is coupled to a feed-in point; the first capacitor is coupled between the first radiation part and the first ground element; the second radiation part and the third radiation part are coupled to the second ground element and adjacent to the first radiation part; the first radiation part is disposed between the second radiation part and the third radiation part; the fourth radiation part and the fifth radiation part are coupled between the first ground element and the second ground element; the first radiation part, the second radiation part and the third radiation part are substantially enclosed by the first ground element, the second ground element, the fourth radiation part and the fifth radiation part. The antenna structure has the advantages of small size, wide frequency band, low manufacturing cost and adaptability to different environments compared with the conventional design, and is very suitable for application in various mobile communication devices.

Description

Technical Field

[0001] This invention relates to an antenna structure, and more particularly to a wideband antenna structure. 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 bandwidth of an antenna used for receiving or transmitting signals is insufficient, it can easily lead to a degradation in the communication quality of mobile devices. Therefore, designing small-sized, wide-bandwidth antenna components is an important task for antenna designers.

[0004] Therefore, an antenna structure is needed to solve the above problems. Summary of the Invention

[0005] In a preferred embodiment, the present invention provides an antenna structure comprising: a first grounding element; a second grounding element; a first radiating portion coupled to a feed point; a first capacitor coupled between the first radiating portion and the first grounding element; a second radiating portion coupled to the second grounding element and adjacent to the first radiating portion; a third radiating portion coupled to the second grounding element and adjacent to the first radiating portion, wherein the first radiating portion is disposed between the second radiating portion and the third radiating portion; a fourth radiating portion coupled between the first grounding element and the second grounding element; and a fifth radiating portion coupled between the first grounding element and the second grounding element; wherein the first radiating portion, the second radiating portion, and the third radiating portion are generally surrounded by the first grounding element, the second grounding element, the fourth radiating portion, and the fifth radiating portion.

[0006] In some embodiments, the first radiating portion is L-shaped or of unequal width.

[0007] In some embodiments, the first radiating portion further includes an end extension portion, and the second radiating portion further includes an end bend portion.

[0008] In some embodiments, the second radiating portion is in the shape of an inverted L.

[0009] In some embodiments, the third radiating portion is presented as a straight strip.

[0010] In some embodiments, a first coupling gap is formed between the second radiating portion and the first radiating portion, and a second coupling gap is formed between the third radiating portion and the first radiating portion, wherein the width of at least any portion of the first coupling gap and the second coupling gap is less than or equal to 3 mm.

[0011] In some embodiments, a third coupling gap is formed between the first radiating portion and the first grounding element, and a fourth coupling gap is formed between the second radiating portion and the first grounding element, wherein the width of at least any portion of the third coupling gap and the fourth coupling gap is less than or equal to 3 mm.

[0012] In some embodiments, the fourth radiating portion includes a first segment and a second segment adjacent to each other, the first segment being coupled to a first grounding element and the second segment being coupled to a second grounding element.

[0013] In some embodiments, the antenna structure further includes a second capacitor connected in series between the first segment and the second segment.

[0014] In some embodiments, the antenna structure further includes a sixth radiating portion coupled to the second segment, wherein the sixth radiating portion is substantially parallel to the first grounding element and the second grounding element.

[0015] In some embodiments, the antenna structure further includes a non-conductive support element, wherein the first grounding element, the second grounding element, the first radiating part, the second radiating part, the third radiating part, the fourth radiating part, the fifth radiating part, and the sixth radiating part are all disposed on the non-conductive support element.

[0016] In some embodiments, the fifth radiating portion includes a third segment and a fourth segment adjacent to each other, the third segment being coupled to a first grounding element and the fourth segment being coupled to a second grounding element.

[0017] In some embodiments, the antenna structure further includes a third capacitor connected in series between the third segment and the fourth segment.

[0018] In some embodiments, the antenna structure further includes a fourth capacitor coupled between the feed point and the first radiating element.

[0019] In some embodiments, the antenna structure further includes an inductor coupled between the feed point and the second radiating element.

[0020] In some embodiments, the antenna structure can cover a first frequency band, a second frequency band, a third frequency band, and a fourth frequency band.

[0021] In some embodiments, the first frequency band is between 2400MHz and 2500MHz, the second frequency band is between 5000MHz and 5900MHz, the third frequency band is between 5900MHz and 6800MHz, and the fourth frequency band is between 6800MHz and 7500MHz.

[0022] In some embodiments, the length of the first radiating portion is greater than or equal to 0.125 times the wavelength of the first frequency band.

[0023] In some embodiments, the length of the second radiating portion is greater than or equal to 0.125 times the wavelength of the first frequency band.

[0024] In some embodiments, the length of the third radiating portion is greater than or equal to 0.125 times the wavelength of the second frequency band.

[0025] This invention proposes a novel antenna structure. Compared with traditional designs, the antenna structure of this invention has advantages such as small size, wide bandwidth, low manufacturing cost, and adaptability to different environments. Therefore, it is very suitable for application in a wide variety of mobile communication devices. Attached Figure Description

[0026] Figure 1 This shows a top view of an antenna structure according to an embodiment of the present invention.

[0027] Figure 2 This diagram shows the return loss of an antenna structure according to an embodiment of the present invention.

[0028] Figure 3 This shows a top view of an antenna structure according to an embodiment of the present invention.

[0029] Figure 4 A return loss diagram of an antenna structure according to an embodiment of the present invention is shown.

[0030] Figure 5 This shows a side view of a mobile device according to an embodiment of the present invention.

[0031] Figure 6 This shows a side view of a mobile device according to an embodiment of the present invention.

[0032] Explanation of key component symbols:

[0033] 100 and 300 antenna structures

[0034] 110 First grounding element

[0035] 120 Second grounding element

[0036] 130, 330 First Radiation Section

[0037] 131, 331 First end of the first radiating section

[0038] 132, 332 The second end of the first radiating section

[0039] 140, 340 Second Radiation Section

[0040] 141, 341 The first end of the second radiating section

[0041] 142, 342 The second end of the second radiating section

[0042] 150, 350 Third Radiation Section

[0043] 151, 351 The first end of the third radiating section

[0044] 152, 352 The second end of the third radiating section

[0045] 160 Fourth Radiation Section

[0046] 164 First Section

[0047] 165 Second Section

[0048] 170 Fifth Radiation Department

[0049] 174 Section 3

[0050] 175 Section 4

[0051] 180 Non-conductor support element

[0052] 199 signal sources

[0053] 338 The end extension of the first radiating section

[0054] 348 The end bend of the second radiating section

[0055] 390 Sixth Radiation Department

[0056] 391 The first end of the sixth radiating section

[0057] 392 The second end of the sixth radiating section

[0058] 500 and 600 mobile devices

[0059] 510 Metal Back Cover

[0060] 520 Metal Sidewall

[0061] 530 monitor

[0062] 540 Conductive Buffer Element

[0063] 641 First conductive buffer element

[0064] 642 Second conductive buffer element

[0065] C1 First capacitor

[0066] C2 Second capacitor

[0067] C3 Third capacitor

[0068] C4 Fourth capacitor

[0069] FB1, FB5 First Band

[0070] FB2, FB6 Second Band

[0071] FB3, FB7 Third Band

[0072] FB4, FB8 Fourth Band

[0073] FP feed point

[0074] GC coupling gap

[0075] GC1 First Coupling Gap

[0076] GC2 Second Coupling Gap

[0077] GC3 Third Coupling Gap

[0078] GC4 Fourth Coupling Gap

[0079] GC5 Fifth Coupling Gap

[0080] GC6 Sixth Coupling Gap

[0081] Lengths of L1, L2, L3, and L4

[0082] LM inductor

[0083] Widths of W1, W2, W3, W4, W5 Detailed Implementation

[0084] To make the objectives, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below in detail with reference to the accompanying drawings.

[0085] Certain terms are used in the specification and claims to refer to specific elements. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same element. This specification and claims do not distinguish elements by differences in name, but rather by differences in function. The terms "comprising" and "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising 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.

[0086] 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 additional features are 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 or / and structures discussed.

[0087] 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 element or feature and another element(s) in the illustration. 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.

[0088] Figure 1 This diagram shows a top view of 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 smartphone, a tablet computer, or a notebook computer. Figure 1 In one embodiment, the antenna structure 100 includes at least a first ground element 110, a second ground element 120, a first radiation element 130, a second radiation element 140, a third radiation element 150, a fourth radiation element 160, a fifth radiation element 170, and a first capacitor C1. The first ground element 110, the second ground element 120, the first radiation element 130, the second radiation element 140, the third radiation element 150, the fourth radiation element 160, and the fifth radiation element 170 can all be made of metal, such as copper, silver, aluminum, iron, or their alloys.

[0089] The first grounding element 110 and the second grounding element 120 may be located on the upper and lower sides of the antenna structure 100, respectively. The first grounding element 110 and the second grounding element 120 may also be coupled to a system ground plane or a metal casing (not shown).

[0090] The first radiating section 130 can generally be L-shaped. Specifically, the first radiating section 130 has a first end 131 and a second end 132, wherein a feeding point FP is located at the first end 131 of the first radiating section 130, and the second end 132 of the first radiating section 130 is an open end. The feeding point FP can also be coupled to a signal source 199, such as a radio frequency (RF) module, which can be used to excite the antenna structure 100. Additionally, a first capacitor C1 is coupled between a bend in the first radiating section 130 and a first ground element 110.

[0091] The second radiating portion 140 may generally be in the shape of an inverted L. Specifically, the second radiating portion 140 has a first end 141 and a second end 142, wherein the first end 141 of the second radiating portion 140 is coupled to the second grounding element 120, and the second end 142 of the second radiating portion 140 is an open-circuit end. For example, the second end 142 of the second radiating portion 140 and the second end 132 of the first radiating portion 130 may extend in generally opposite and mutually distant directions. In some embodiments, the second radiating portion 140 is adjacent to the first radiating portion 130, wherein a first coupling gap GC1 is formed between the second radiating portion 140 and the first radiating portion 130. It should be noted that the terms "adjacent" or "adjacent" in this specification may refer to a distance between two corresponding elements that is less than a predetermined distance (e.g., 5 mm or less), but generally do not include cases where two corresponding elements are in direct contact with each other (i.e., the aforementioned distance is reduced to 0).

[0092] The third radiating portion 150 may be generally in the shape of a straight strip, wherein the first radiating portion 130 may be disposed between the second radiating portion 140 and the third radiating portion 150. Specifically, the third radiating portion 150 has a first end 151 and a second end 152, wherein the first end 151 of the third radiating portion 150 is coupled to the second grounding element 120, and the second end 152 of the third radiating portion 150 is an open-circuit end and may extend toward the first radiating portion 130. In some embodiments, the third radiating portion 150 is adjacent to the first radiating portion 130, wherein a second coupling gap GC2 is formed between the third radiating portion 150 and the first radiating portion 130.

[0093] In some embodiments, the first radiating portion 130 and the second radiating portion 140 are both adjacent to the first grounding element 110, wherein a third coupling gap GC3 is formed between the first radiating portion 130 and the first grounding element 110, and a fourth coupling gap GC4 is formed between the second radiating portion 140 and the first grounding element 110.

[0094] The fourth radiating portion 160 is coupled between the first grounding element 110 and the second grounding element 120. Specifically, the fourth radiating portion 160 includes a first segment 164 and a second segment 165 adjacent to each other, wherein the first segment 164 is coupled to the first grounding element 110, and the second segment 165 is coupled to the second grounding element 120. In some embodiments, a fifth coupling gap GC5 is formed between the first segment 164 and the second segment 165.

[0095] The fifth radiating section 170 is coupled between the first grounding element 110 and the second grounding element 120, wherein the fifth radiating section 170 may be substantially parallel to the fourth radiating section 160. Specifically, the fifth radiating section 170 includes a third segment 174 and a fourth segment 175 adjacent to each other, wherein the third segment 174 is coupled to the first grounding element 110, and the fourth segment 175 is coupled to the second grounding element 120. In some embodiments, a sixth coupling gap GC6 is formed between the third segment 174 and the fourth segment 175. It should be noted that the first radiating section 130, the second radiating section 140, the third radiating section 150, and the first capacitor C1 are substantially surrounded by the first grounding element 110, the second grounding element 120, the fourth radiating section 160, and the fifth radiating section 170.

[0096] In some embodiments, the antenna structure 100 further includes a nonconductive support element 180, wherein the first grounding element 110, the second grounding element 120, the first radiating portion 130, the second radiating portion 140, the third radiating portion 150, the fourth radiating portion 160, the fifth radiating portion 170, and the first capacitor C1 are all disposed on the nonconductive support element 180. The shape and type of the nonconductive support element 180 are not particularly limited in this invention. In other embodiments, the nonconductive support element 180 may also be replaced by a printed circuit board (PCB) or a flexible printed circuit (FPC).

[0097] Figure 2 This diagram shows the return loss of an 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 return loss (dB). Figure 2 Based on the measurement results, the antenna structure 100 can cover at least a first frequency band FB1, a second frequency band FB2, a third frequency band FB3, and a fourth frequency band FB4. For example, the first frequency band FB1 can be between 2400MHz and 2500MHz, the second frequency band FB2 can be between 5000MHz and 5900MHz, the third frequency band FB3 can be between 5900MHz and 6800MHz, and the fourth frequency band FB4 can be between 6800MHz and 7500MHz. Therefore, the antenna structure 100 can support broadband operation of both traditional WLAN (Wireless Local Area Network) and next-generation Wi-Fi 6E.

[0098] In some embodiments, the operating principle of the antenna structure 100 may be as follows. The second radiating element 140 may be coupled and excited by the first radiating element 130, and used in conjunction with the fourth radiating element 160 and the fifth radiating element 170 to form the aforementioned first frequency band FB1. The first radiating element 130, the second radiating element 140, the fourth radiating element 160, and the fifth radiating element 170 can all be used to adjust the impedance matching and resonant frequency shift of the first frequency band FB1. The third radiating element 150 may be coupled and excited by the first radiating element 130 to form the aforementioned second frequency band FB2. Furthermore, the first radiating element 130 and the second radiating element 140 may also excite some higher-order resonant modes to form the aforementioned third frequency band FB3 and fourth frequency band FB4. According to actual measurement results, the addition of the first capacitor C1 helps to improve the impedance matching of the second frequency band FB2, the third frequency band FB3, and the fourth frequency band FB4 simultaneously, thereby improving its operating bandwidth.

[0099] In some embodiments, the component dimensions and parameters of the antenna structure 100 may be as described below. The length L1 of the first radiating portion 130 may be greater than or equal to 0.125 times the wavelength (λ / 8) of the first frequency band FB1 of the antenna structure 100. The length L2 of the second radiating portion 140 may be greater than or equal to 0.125 times the wavelength (λ / 8) of the first frequency band FB1 of the antenna structure 100. The length L3 of the third radiating portion 150 may be greater than or equal to 0.125 times the wavelength (λ / 8) of the second frequency band FB2 of the antenna structure 100. The widths W1 of the first radiating portion 130, W2 of the second radiating portion 140, W3 of the third radiating portion 150, W4 of the fourth radiating portion 160, and W5 of the fifth radiating portion 170 may all be greater than or equal to 1 mm. The width of each of the first coupling gap GC1, the second coupling gap GC2, the third coupling gap GC3, the fourth coupling gap GC4, the fifth coupling gap GC5, and the sixth coupling gap GC6 may all be less than or equal to 3 mm. In some embodiments, the aforementioned coupling gaps GC1-GC6 may have an unequal width shape (e.g., a Z-shape or a W-shape), wherein the width of at least any portion of the coupling gaps GC1-GC6 may be less than or equal to 3 mm. The capacitance of the first capacitor C1 may be between 2 pF and 6.8 pF, for example, approximately 3.3 pF. The above dimensions and parameter ranges were determined based on multiple experimental results, which help improve the operating bandwidth and impedance matching of the antenna structure 100.

[0100] The following embodiments will illustrate other variations of the antenna structure 100, which can also achieve similar effects. It must be understood that these figures and descriptions are merely examples and are not intended to limit the scope of the invention.

[0101] Figure 3 This shows a top view of an antenna structure 300 according to an embodiment of the present invention. Figure 3 and Figure 1 Similar. Figure 3 In one embodiment, the antenna structure 300 further includes a sixth radiating section 390, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and an inductor LM, all of which can be disposed on the non-conductive support element 180. Additionally, the design of the first radiating section 330, the second radiating section 340, and the third radiating section 350 of the antenna structure 300 is slightly modified.

[0102] In the fourth radiating section 160, a second capacitor C2 is connected in series between its first segment 164 and second segment 165, replacing the aforementioned fifth coupling gap GC5. In the fifth radiating section 170, a third capacitor C3 is connected in series between its third segment 174 and fourth segment 175, replacing the aforementioned sixth coupling gap GC6. The sixth radiating section 390 may be generally straight and may be generally parallel to the first grounding element 110 and the second grounding element 120. Specifically, the sixth radiating section 390 has a first end 391 and a second end 392, wherein the first end 391 of the sixth radiating section 390 is coupled to the second segment 165 of the fourth radiating section 160, and the second end 392 of the sixth radiating section 390 is an open-circuit end and may extend toward the second radiating section 340.

[0103] The first radiating portion 330 may generally have an unequal width. Specifically, the first radiating portion 330 has a first end 331 and a second end 332, wherein the fourth capacitor C4 is coupled between the feed point FP and the first end 331 of the first radiating portion 330. In some embodiments, the first radiating portion 330 further includes a terminal extension portion 338 adjacent to the second end 332 of the first radiating portion 330. For example, the terminal extension portion 338 of the first radiating portion 330 may generally have an inverted triangular shape and may extend towards the second grounding element 120.

[0104] The second radiating portion 340 may generally be in the shape of an inverted L. Specifically, the second radiating portion 340 has a first end 341 and a second end 342, wherein the first end 341 of the second radiating portion 340 is coupled to the second grounding element 120, and the inductor LM is coupled between the feed point FP and the first end 341 of the second radiating portion 340. In some embodiments, the second radiating portion 340 further includes a terminal bent portion 348 adjacent to the second end 342 of the second radiating portion 340.

[0105] The third radiating portion 350 may generally be trapezoidal. Specifically, the third radiating portion 350 has a first end 351 and a second end 352, wherein the first end 351 is coupled to the second grounding element 120, and the second end 352 is an open-circuit end and extends toward the end extension 338 of the first radiating portion 330. In some embodiments, a coupling gap GC may be formed between the third radiating portion 350 and the first radiating portion 330 and its end extension 338, the width of which may be less than or equal to 3 mm. In other embodiments, the aforementioned coupling gap GC may have an unequal width shape (e.g., a Z-shape or a W-shape), wherein the width of at least any portion of the coupling gap GC may be less than or equal to 3 mm.

[0106] Figure 4 This diagram shows the return loss of an antenna structure 300 according to an embodiment of the present invention, where the horizontal axis represents the operating frequency (MHz) and the vertical axis represents the return loss (dB). Figure 4 Based on the measurement results, the antenna structure 300 can cover at least a first frequency band FB5, a second frequency band FB6, a third frequency band FB7, and a fourth frequency band FB8. For example, the first frequency band FB5 can be between 2400MHz and 2500MHz, the second frequency band FB6 can be between 5000MHz and 5900MHz, the third frequency band FB7 can be between 5900MHz and 6800MHz, and the fourth frequency band FB8 can be between 6800MHz and 7500MHz. Therefore, the antenna structure 300 can also support broadband operation of traditional WLAN and next-generation Wi-Fi 6E.

[0107] In some embodiments, the component dimensions and parameters of the antenna structure 300 may be as described below. The length L4 of the sixth radiating section 390 may be greater than or equal to 0.125 times the wavelength (λ / 8) of the fourth frequency band FB8 of the antenna structure 300. The capacitance value of the second capacitor C2 may be between 0.1pF and 1pF, for example, approximately 0.4pF. The capacitance value of the third capacitor C3 may be between 0.1pF and 1pF, for example, approximately 0.4pF. The capacitance value of the fourth capacitor C4 may be between 2pF and 6pF, for example, approximately 3.6pF. The inductance value of the inductor LM may be between 4nH and 10nH, for example, approximately 6.2nH. It should be noted that, based on actual measurement results, the aforementioned design approach helps to further optimize the operating bandwidth and impedance matching of the antenna structure 300. Figure 3 The remaining features of the antenna structure 300 are all the same as Figure 1 Since the antenna structures are similar to those of the 100, both embodiments can achieve similar operational effects.

[0108] Figure 5 This shows a side view of a mobile device 500 according to an embodiment of the present invention. Figure 5 In this embodiment, the mobile device 500 includes a metal back cover 510, a metal sidewall 520, a display device 530, a conductive buffer element 540, and the aforementioned antenna structure 100. The metal sidewall 520 is coupled to the metal back cover 510 and may be substantially perpendicular to it. The antenna structure 100 may be disposed between the metal sidewall 520 and the display 530. For example, the conductive buffer element 540 may be a pad or a conductive foam, which may be located at the bottom of the non-conductive support element 180. In addition, the first grounding element 110 and the second grounding element 120 may be coupled to the conductive buffer element 540 and the metal back cover 510, respectively. According to actual measurements, the antenna structure 100 can be well integrated with the other components of the mobile device 500, so that even if the antenna structure 100 is adjacent to an environment with a metal casing, it can still provide good radiation characteristics. In other embodiments, the first grounding element 110 and the second grounding element 120 may extend further and be interconnected at the bottom of the non-conductive support element 180, and then they are coupled to the metal back cover 510 via the conductive buffer element 540.

[0109] Figure 6 This shows a side view of a mobile device 600 according to an embodiment of the present invention. Figure 6 and Figure 5 Similar. Figure 6In one embodiment, the mobile device 600 further includes a first conductive buffer element 641 and a first conductive buffer element 642 (replacing the aforementioned conductive buffer element 540), which may be located on both sides of the non-conductive support element 180, respectively. Additionally, a first grounding element 110 may be coupled to the metal back cover 510 via the first conductive buffer element 641, while a second grounding element 120 may be coupled to the metal back cover 510 via the second conductive buffer element 642. The aforementioned metal sidewall 520 is only an optional element and may be removed from the mobile device 600 in other embodiments. Figure 6 The remaining features of the mobile device 600 are all the same as Figure 5 The mobile device 500 is similar, so both embodiments can achieve similar operational effects.

[0110] This invention proposes a novel antenna structure. Compared with traditional designs, this invention has advantages such as small size, wide bandwidth, low manufacturing cost, and adaptability to different environments, making it well-suited for application in a wide variety of mobile communication devices.

[0111] It is worth noting that the component dimensions, shapes, and frequency ranges described above are not limiting factors of this invention. Antenna designers can adjust these settings according to different needs. The antenna structure of this invention is not limited to... Figures 1-6 The state illustrated. This invention may include only... Figures 1-6 Any one or more features of any one or more embodiments of the present invention. In other words, not all of the illustrated features need to be implemented simultaneously in the antenna structure of the present invention.

[0112] The ordinal numbers in this specification and claims, such as "first," "second," "third," etc., are not sequential in any particular order; they are only used to distinguish between two different elements with the same name.

[0113] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the scope of the invention. Any person skilled in the art should be able to make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be determined by the scope of the appended claims.

Claims

1. An antenna structure comprising: A first grounding element; A second grounding element; A first radiating section, the first radiating section being coupled to a feed point; A first capacitor is coupled between the first radiating portion and the first grounding element; A second radiating portion is coupled to the second grounding element and is adjacent to the first radiating portion; A third radiating portion is coupled to the second grounding element and is adjacent to the first radiating portion, wherein the first radiating portion is disposed between the second radiating portion and the third radiating portion; A fourth radiating part is coupled between the first grounding element and the second grounding element; as well as A fifth radiating part is coupled between the first grounding element and the second grounding element; The first radiating part, the second radiating part, and the third radiating part are generally surrounded by the first grounding element, the second grounding element, the fourth radiating part, and the fifth radiating part. The second radiating part and the first radiating part extend in roughly opposite and mutually distant directions.

2. The antenna structure as claimed in claim 1, wherein the first radiating portion is L-shaped or of unequal width.

3. The antenna structure as claimed in claim 1, wherein the first radiating part further includes an end extension portion, and the second radiating part further includes an end bending portion.

4. The antenna structure as claimed in claim 1, wherein the second radiating part is in the shape of an inverted L.

5. The antenna structure as claimed in claim 1, wherein the third radiating part is in the shape of a straight strip.

6. The antenna structure as claimed in claim 1, wherein a first coupling gap is formed between the second radiating portion and the first radiating portion, and a second coupling gap is formed between the third radiating portion and the first radiating portion, wherein the width of at least any portion of the first coupling gap and the second coupling gap is less than or equal to 3 mm.

7. The antenna structure as claimed in claim 1, wherein a third coupling gap is formed between the first radiating part and the first grounding element, and a fourth coupling gap is formed between the second radiating part and the first grounding element, wherein the width of at least any portion of the third coupling gap and the fourth coupling gap is less than or equal to 3 mm.

8. The antenna structure of claim 1, wherein the fourth radiating portion includes a first segment and a second segment adjacent to each other, the first segment being coupled to the first grounding element, and the second segment being coupled to the second grounding element.

9. The antenna structure as described in claim 8, further comprising: A second capacitor is connected in series between the first segment and the second segment.

10. The antenna structure as described in claim 8, further comprising: A sixth radiating section is coupled to the second section, wherein the sixth radiating section is substantially parallel to the first grounding element and the second grounding element.

11. The antenna structure as described in claim 10, further comprising: A non-conductor support element, wherein the first grounding element, the second grounding element, the first radiating part, the second radiating part, the third radiating part, the fourth radiating part, the fifth radiating part, and the sixth radiating part are all disposed on the non-conductor support element.

12. The antenna structure of claim 1, wherein the fifth radiating portion includes a third segment and a fourth segment adjacent to each other, the third segment being coupled to the first grounding element, and the fourth segment being coupled to the second grounding element.

13. The antenna structure as described in claim 12, further comprising: A third capacitor is connected in series between the third segment and the fourth segment.

14. The antenna structure as described in claim 1, further comprising: A fourth capacitor is coupled between the feed point and the first radiating part.

15. The antenna structure as described in claim 1, further comprising: An inductor is coupled between the feed point and the second radiating part.

16. The antenna structure of claim 1, wherein the antenna structure can cover a first frequency band, a second frequency band, a third frequency band, and a fourth frequency band.

17. The antenna structure of claim 16, wherein the first frequency band is between 2400 MHz and 2500 MHz, the second frequency band is between 5000 MHz and 5900 MHz, the third frequency band is between 5900 MHz and 6800 MHz, and the fourth frequency band is between 6800 MHz and 7500 MHz.

18. The antenna structure of claim 16, wherein the length of the first radiating part is greater than or equal to 0.125 times the wavelength of the first frequency band.

19. The antenna structure of claim 16, wherein the length of the second radiating part is greater than or equal to 0.125 times the wavelength of the first frequency band.

20. The antenna structure of claim 16, wherein the length of the third radiating part is greater than or equal to 0.125 times the wavelength of the second frequency band.

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