Mobile device supporting broadband operation

Abstract

The invention discloses a mobile device supporting broadband operation. The mobile device comprises a metal mechanism part, a first radiation part, a second radiation part, a third radiation part and a dielectric substrate, a slot may be formed within the metal machine member. The first radiation part is provided with a feed-in point. The second radiation portion is coupled to a ground potential. The third radiation part is coupled to a ground potential, wherein the third radiation part is arranged between the first radiation part and the second radiation part. The dielectric substrate is a slotted hole adjacent to the metal mechanism part, wherein the first radiation part, the second radiation part and the third radiation part can be arranged on the dielectric substrate. The slot, the first radiation part, the second radiation part and the third radiation part of the metal mechanism component can form an antenna structure together.

Description

Technical Field

[0001] The present invention relates to a mobile device, and more particularly to a mobile device capable of supporting broadband operation. 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. Summary of the invention

[0004] In a preferred embodiment, the present invention proposes a mobile device that supports broadband operation, comprising: a metal structure component, wherein a slot is formed within the metal structure component; a first radiating portion having a feeding point; a second radiating portion coupled to a ground potential; a third radiating portion coupled to the ground potential, wherein the third radiating portion is disposed between the first radiating portion and the second radiating portion; and a dielectric substrate adjacent to the slot of the metal structure component, wherein the first radiating portion, the second radiating portion, and the third radiating portion are all disposed on the dielectric substrate; wherein the slot of the metal structure component, the first radiating portion, the second radiating portion, and the third radiating portion together form an antenna structure.

[0005] In some embodiments, the slot of the metal mechanism component is a closed slot.

[0006] In some embodiments, the first radiating portion is approximately located at a center point of the slot of the metal structure component.

[0007] In some embodiments, the first radiating portion has a meandering shape.

[0008] In some embodiments, the second radiating portion is in a straight strip shape.

[0009] In some embodiments, the third radiation portion is in an L-shape.

[0010] 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 2400 MHz and 2500 MHz, the second frequency band is between 5150 MHz and 5850 MHz, and the third frequency band is between 5925 MHz and 7125 MHz.

[0011] In some embodiments, the length of the slot of the metal structure component is substantially equal to 0.5 times the wavelength of the first frequency band, 1 times the wavelength of the second frequency band, or 1.5 times the wavelength of the third frequency band.

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

[0013] In some embodiments, the mobile device further comprises: a glass element attached to the metal structure component; and a non-conductive base shell, wherein the metal structure component and the dielectric substrate are both disposed between the glass element and the non-conductive base shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A is a perspective view showing a mobile device according to an embodiment of the present invention.

[0015] Figure 1B is a schematic diagram showing a lower portion of a mobile device according to an embodiment of the present invention.

[0016] Figure 1C is a schematic diagram showing an upper portion of a mobile device according to an embodiment of the present invention.

[0017] Figure 1D is a side view showing a mobile device according to an embodiment of the present invention.

[0018] Figure 2 FIG. 4 is a graph showing the return loss of an antenna structure of a mobile device according to an embodiment of the present invention.

[0019] Figure 3 is a cross-sectional view showing a mobile device according to another embodiment of the present invention.

[0020] Figure 4 FIG. 4 is a graph showing the return loss of the antenna structure when the mobile device according to another embodiment of the present invention does not use the proposed design.

[0021] The reference numerals are described as follows:

[0022] 100, 300: Mobile device

[0023] 110, 310: Metal components

[0024] 120, 320: Slots in metal components

[0025] 121: First closed end of the slot

[0026] 122: Second closed end of the slot

[0027] 130: First radiation part

[0028] 131: first end of the first radiation portion

[0029] 132: Second end of the first radiation portion

[0030] 135: Gap area

[0031] 140: Second radiation unit

[0032] 141: First end of the second radiation portion

[0033] 142: Second end of the second radiation portion

[0034] 150: The third radiation

[0035] 151: First end of the third radiation portion

[0036] 152: The second end of the third radiation portion

[0037] 170: Dielectric substrate

[0038] 190: Signal source

[0039] 330: Glass elements

[0040] 350: Non-conductive base housing

[0041] CP: Center Point

[0042] D1: Spacing

[0043] E1: First surface

[0044] E2: Second Surface

[0045] FB1: First frequency band

[0046] FB2: Second frequency band

[0047] FB3: Third frequency band

[0048] FP: Feed Point

[0049] LS, L1, L2, L3: Length

[0050] VSS: Ground potential

[0051] WS, W1, W2, W3: Width DETAILED DESCRIPTION

[0052] In order to make the purpose, features and advantages of the present invention more clearly understood, specific embodiments of the present invention are given below and described in detail with reference to the accompanying drawings.

[0053] Certain words are used in the specification and claims to refer to specific components. It should be understood by those skilled in the art that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. The words "including" and "comprising" mentioned throughout the specification and claims are open-ended terms and should be interpreted as "including but not limited to". The word "substantially" means that within an acceptable error range, those skilled in the art can solve the technical problem and achieve the basic technical effect within a certain error range. In addition, the word "coupled" in this specification includes any direct and indirect electrical connection means. Therefore, if the text describes a first device coupled to a second device, it means that the first device can be directly electrically connected to the second device, or indirectly electrically connected to the second device via other devices or connection means.

[0054] 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, different examples in the following disclosure may reuse the same reference symbols and / or marks. 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.

[0055] In addition, spatially related 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 diagram. In addition to the orientation shown in the drawings, these spatially 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 spatially related terms used herein may be interpreted in the same manner.

[0056] Figure 1A is a perspective view showing a mobile device 100 according to an embodiment of the present invention. Figure 1B is a schematic diagram showing the lower portion of the mobile device 100 according to an embodiment of the present invention. Figure 1C is a schematic diagram showing an upper portion of a mobile device 100 according to an embodiment of the present invention. Figure 1D is a side view of a mobile device 100 according to an embodiment of the present invention. Figure 1A , Figure 1B , Figure 1C , Figure 1D For example, the mobile device 100 may be a smart phone, a tablet computer, or a notebook computer. Figure 1A , Figure 1B , Figure 1C , Figure 1D In the embodiment of the present invention, the mobile device 100 includes: a metal mechanism element 110, a first radiation element 130, a second radiation element 140, a third radiation element 150, and a dielectric substrate 170, wherein the first radiation element 130, the second radiation element 140, and the third radiation element 150 can all be made of metal materials, such as copper, silver, aluminum, iron, or alloys thereof.

[0057] A slot 120 may be formed in the metal structure 110, wherein the slot 120 of the metal structure 110 may be substantially in the shape of a straight strip. Specifically, the slot 120 may be a closed slot having a first closed end 121 and a second closed end 122 that are away from each other. In some embodiments, the mobile device 100 may further include a non-conductive material (not shown), which may be filled in the slot 120 of the metal structure 110 to achieve a waterproof or dustproof function.

[0058] The dielectric substrate 170 may be a FR4 (Flame Retardant 4) substrate, a printed circuit board (PCB), or a flexible circuit board (FCB). The dielectric substrate 170 may have a first surface E1 and a second surface E2 opposite to each other, wherein the first radiating portion 130, the second radiating portion 140, and the third radiating portion 150 may be disposed on the first surface E1 of the dielectric substrate 170, and the second surface E2 of the dielectric substrate 170 may be adjacent to the slot 120 of the metal structure 110. It should be noted that the term "adjacent" or "adjacent" in this specification may refer to the corresponding two elements having a distance less than a predetermined distance (e.g., 10 mm or less), and may also include the situation where the corresponding two elements are in direct contact with each other (i.e., the aforementioned distance is shortened to 0). In some embodiments, the second surface E2 of the dielectric substrate 170 is directly attached to the metal structure 110, so that the dielectric substrate 170 may at least partially cover the slot 120 of the metal structure 110.

[0059] The first radiating portion 130 may generally present a meandering shape, which may include an S-shaped portion or a W-shaped portion. In detail, the first radiating portion 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 portion 130, and the second end 132 of the first radiating portion 130 is an open end. The feeding point FP may be further coupled to a signal source 190. For example, the signal source 190 may be a radio frequency (RF) module. In some embodiments, the first radiating portion 130 is approximately located at a center point CP of the slot 120 of the metal structure component 110. In other words, the first radiating portion 130 has a vertical projection on the metal structure component 110, wherein the vertical projection may at least partially overlap with the center point CP of the slot 120.

[0060] The second radiating portion 140 may be substantially in the shape of a straight strip. 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 a ground potential (Ground Voltage) VSS, and the second end 142 of the second radiating portion 140 is an open end, which may at least partially extend across the slot 120 of the metal structure component 110. For example, the ground potential VSS may be provided by a system ground plane (System Ground Plane) of the mobile device 100 (not shown), but is not limited thereto. In some embodiments, the second radiating portion 140 may also be adjacent to the first closed end 121 of the slot 120 of the metal structure component 110.

[0061] The third radiating portion 150 may be substantially L-shaped, wherein the third radiating portion 150 is disposed between the first radiating portion 130 and the second radiating portion 140. 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 ground potential VSS, and the second end 152 of the third radiating portion 150 is an open end. For example, the second end 152 of the third radiating portion 150 and the second end 132 of the first radiating portion 130 may extend substantially in the same direction. It should be noted that the third radiating portion 150 may be closer to the first radiating portion 130 than the second radiating portion 140. In some embodiments, the first radiating portion 130 may define a notch region 135, wherein the second end 152 of the third radiating portion 150 may at least partially extend into the notch region 135 of the first radiating portion 130.

[0062] In a preferred embodiment, the slot 120 of the metal structure 110 , the first radiating portion 130 , the second radiating portion 140 , and the third radiating portion 150 may together form an antenna structure of the mobile device 100 .

[0063] Figure 2 1 is a graph showing the return loss of the antenna structure of the mobile device 100 according to an embodiment of the present invention, wherein the horizontal axis represents the operating frequency (MHz) and the vertical axis represents the return loss (dB). Figure 2According to the measurement results, the antenna structure of the mobile device 100 can cover a first frequency band (Frequency Band) FB1, a second frequency band FB2, and a third frequency band FB3. For example, the first frequency band FB1 can be between 2400MHz and 2500MHz, the second frequency band FB2 can be between 5150MHz and 5850MHz, and the third frequency band FB3 can be between 5925MHz and 7125MHz. Therefore, the mobile device 100 will at least support the broadband operation of the traditional WLAN (Wireless Local Area Network) and the new generation Wi-Fi 6E.

[0064] In some embodiments, the operating principle of the antenna structure of the mobile device 100 can be as described below. The slot 120 of the metal structure component 110 can excite a fundamental resonant mode to form the aforementioned first frequency band FB1. The slot 120 of the metal structure component 110 can further excite a first higher-order resonant mode to form the aforementioned second frequency band FB2. In addition, the slot 120 of the metal structure component 110 can further excite a second higher-order resonant mode to form the aforementioned third frequency band FB3. According to actual measurement results, if the first radiating portion 130 is disposed at the center point CP of the slot 120 of the metal structure component 110, the operational bandwidths of the aforementioned first frequency band FB1, second frequency band FB2, and third frequency band FB3 can be further improved. Furthermore, if the second end 152 of the third radiating portion 150 at least partially extends into the notch region 135 of the first radiating portion 130 , a coupling amount between the first radiating portion 130 and the third radiating portion 150 will increase, thereby improving the impedance matching of the third frequency band FB3 .

[0065] In some embodiments, the dimensions of the components of the mobile device 100 may be as follows. The length LS of the slot 120 of the metal mechanism component 110 may be substantially equal to 0.5 times the wavelength (λ / 2) of the first frequency band FB1 of the antenna structure of the mobile device 100. Alternatively, the length LS of the slot 120 of the metal mechanism component 110 may be substantially equal to 1 times the wavelength (1λ) of the second frequency band FB2 of the antenna structure of the mobile device 100. For another example, the length LS of the slot 120 of the metal mechanism component 110 may be substantially equal to 1.5 times the wavelength (3λ / 2) of the third frequency band FB3 of the antenna structure of the mobile device 100. The width WS of the slot 120 of the metal mechanism component 110 may be between 3 mm and 5 mm. The length L1 of the first radiating portion 130 may be between 5 mm and 10 mm. The width W1 of the first radiating portion 130 may be between 0.5 mm and 1 mm. The length L2 of the second radiating portion 140 may be between 3 mm and 5 mm. The width W2 of the second radiating portion 140 may be between 2 mm and 3 mm. The length L3 of the third radiating portion 150 may be approximately equal to 0.25 times the wavelength (λ / 4) of the third frequency band FB3 of the antenna structure of the mobile device 100. The width W3 of the third radiating portion 150 may be between 0.5 mm and 1 mm. The distance D1 between the second radiating portion 140 and the third radiating portion 150 may be between 8 mm and 12 mm. The above size range is obtained based on multiple experimental results, which helps to optimize the operating bandwidth and impedance matching of the antenna structure of the mobile device 100.

[0066] The following will introduce different configurations and detailed structural features of the mobile device 100. It should be understood that these drawings and descriptions are only for example and are not intended to limit the present invention.

[0067] Figure 3 FIG. 4 is a cross-sectional view of a mobile device 300 according to another embodiment of the present invention. Figure 3 and Figure 1A , Figure 1B , Figure 1C , Figure 1D Similar. Figure 3In the embodiment of the present invention, the mobile device 300 further includes a glass element 330 and a nonconductive base housing 350. For example, the nonconductive base housing 350 may have a retraction cutting design, which may be arranged relative to the glass element 330. In addition, a metal structure component 310 of the mobile device 300 may generally present a bent shape, wherein a slot 320 may be formed in the metal structure component 310. The glass element 330 may be a glass board. In detail, the glass element 330 may be attached to a surface of the metal structure component 310, and the second surface E2 of the dielectric substrate 170 may be attached to another opposite surface of the metal structure component 110. That is, the slot 320 of the metal structure component 310 may be covered by the glass element 330. In some embodiments, the metal structure 110, the dielectric substrate 170, and the first radiation portion 130, the second radiation portion 140, and the third radiation portion 150 thereon can be disposed between the glass element 330 and the non-conductive base housing 350. It should be understood that the metal structure 310 and the glass element 330 can be collectively regarded as the so-called "C component" in the field of notebook computers, and the non-conductive base housing 350 can be regarded as the so-called "D component" in the field of notebook computers. Figure 3 The remaining features of the mobile device 300 are the same as Figure 1A , Figure 1B , Figure 1C , Figure 1D The mobile device 100 is similar to the mobile device 100 of the present invention, so the two embodiments can achieve similar operating effects.

[0068] Figure 4 FIG. 3 is a graph showing the return loss of the antenna structure of the mobile device 300 according to another embodiment of the present invention when the proposed design is not used. Since the glass element 330 has a relatively large equivalent dielectric constant (e.g., between 7 and 8), it will have a serious negative impact on the radiation pattern of the antenna structure of the mobile device 300. Figure 4 According to the measurement results, if the design of the present invention is not used, the operating bandwidth of the antenna structure of the mobile device 300 is often very limited.

[0069] On the contrary, after introducing the design of the present invention, the return loss diagram of the antenna structure of the mobile device 300 will be approximately Figure 2 The measurement result is not affected by the glass element 330. In other words, the antenna structure of the present invention can be applied to different operating environments and can take into account both the aesthetics of the device and the improvement of the overall communication quality.

[0070] The present invention provides a novel mobile device and antenna structure thereof. Compared with the conventional design, the present invention has at least the advantages of small size, wide bandwidth, low manufacturing cost, and beautified device appearance, so it is very suitable for application in various communication devices.

[0071] 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 mobile device of the present invention is not limited to Figure 1A-Figure 4 The present invention may only include Figure 1A-Figure 4 In other words, not all the features shown in the figures need to be implemented in the mobile device of the present invention at the same time.

[0072] Ordinal numbers in this specification and claims, such as "first", "second", "third", etc., have no sequential relationship with each other and are only used to distinguish two different elements with the same name.

[0073] Although the present invention is disclosed as above with 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 scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A mobile device supporting broadband operation, comprising: A metal structure component, wherein a slot is formed in the metal structure component; A first radiating portion having a feeding point; a second radiating portion coupled to a ground potential; a third radiating portion coupled to the ground potential, wherein the third radiating portion is disposed between the first radiating portion and the second radiating portion; as well as a dielectric substrate adjacent to the slot of the metal component, wherein the first radiation portion, the second radiation portion, and the third radiation portion are all disposed on the dielectric substrate; The slot of the metal component, the first radiation part, the second radiation part, and the third radiation part together form an antenna structure. 2 . The mobile device as claimed in claim 1 , wherein the slot of the metal mechanism component is a closed slot. 3 . The mobile device as claimed in claim 1 , wherein the first radiating portion is approximately located at a center point of the slot of the metal structure component. The mobile device as claimed in claim 1 , wherein the first radiating portion has a meandering shape. The mobile device as claimed in claim 1 , wherein the second radiating portion is in a straight strip shape. The mobile device as claimed in claim 1 , wherein the third radiating portion is in an L-shape.

7. The mobile device as claimed in claim 1, wherein the antenna structure covers a first frequency band, a second frequency band, and a third frequency band, the first frequency band is between 2400 MHz and 2500 MHz, the second frequency band is between 5150 MHz and 5850 MHz, and the third frequency band is between 5925 MHz and 7125 MHz. 8 . The mobile device as claimed in claim 7 , wherein a length of the slot of the metal mechanism component is substantially equal to 0.5 times the wavelength of the first frequency band, 1 times the wavelength of the second frequency band, or 1.5 times the wavelength of the third frequency band. 9 . The mobile device as claimed in claim 7 , wherein a length of the third radiating portion is substantially equal to 0.25 times the wavelength of the third frequency band.

10. The mobile device of claim 1, further comprising: A glass element is attached to the metal structure component; as well as A non-conductive base shell, wherein the metal structure component and the dielectric substrate are both disposed between the glass element and the non-conductive base shell.

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