CN112311910A

CN112311910A - Mobile device

Info

Publication number: CN112311910A
Application number: CN201910688181.4A
Authority: CN
Inventors: 张琨盛; 林敬基
Original assignee: Acer Inc
Current assignee: Acer Inc
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2021-02-02

Abstract

A mobile device, comprising: a metal machine component, a feed-in radiation part, a first radiation part, a second radiation part, and a dielectric substrate. The metal machine component has a slot, wherein the slot has an open end and a closed end. The feed-in radiation part is provided with a feed-in point. The first radiation part extends across the slot of the metal machine component, wherein the feed radiation part is coupled to a grounding potential through the first radiation part. The second radiation part is coupled to the feed radiation part. The medium substrate is adjacent to the metal machine component, wherein the feed-in radiation part, the first radiation part and the second radiation part are all arranged on the medium substrate. The feed-in radiation part, the first radiation part, the second radiation part and the slotted hole of the metal machine component form an antenna structure together.

Description

Mobile device

Technical Field

The present invention relates to a Mobile Device (Mobile Device), and more particularly, to a Mobile Device and an Antenna Structure (Antenna Structure) thereof.

Background

With the development of mobile communication technology, mobile devices have become increasingly popular in recent years, such as: portable computers, mobile phones, multimedia players and other portable electronic devices with mixed functions. To meet the demand of people, mobile devices generally have a function of wireless communication. Some cover long-range wireless communication ranges, such as: the mobile phone uses 2G, 3G, LTE (Long Term Evolution) system and its used frequency bands of 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz and 2500MHz for communication, while some cover short-distance wireless communication ranges, for example: Wi-Fi and Bluetooth systems use frequency bands of 2.4GHz, 5.2GHz, and 5.8GHz for communication.

In order to pursue the aesthetic appearance, designers nowadays often add elements of metal components to mobile devices. However, the added metal elements tend to adversely affect the antenna supporting wireless communication in the mobile device, thereby degrading the overall communication quality of the mobile device. Therefore, there is a need for a new mobile device and antenna structure to overcome the problems encountered in the conventional technology.

Disclosure of Invention

In a preferred embodiment, the present invention provides a mobile device comprising: a metal machine component having a slot, wherein the slot has an open end and a closed end; a feed-in radiation part having a feed-in point; a first radiation part extending across the slot of the metal machine component, wherein the feed radiation part is coupled to a ground potential via the first radiation part; a second radiation part coupled to the feed radiation part; the feeding radiation part, the first radiation part and the second radiation part are all arranged on the medium substrate; wherein the feed-in radiation part, the first radiation part, the second radiation part and the slot of the metal machine component form an antenna structure together.

In some embodiments, the feeding radiating part is in a straight strip shape.

In some embodiments, the first radiating portion has an L-shape.

In some embodiments, the second radiating portion has a straight strip shape.

In some embodiments, the feeding radiating portion has a first end and a second end, wherein the feeding point is located at the first end of the feeding radiating portion.

In some embodiments, the first radiating portion has a first end and a second end, wherein the first end of the feeding radiating portion is coupled to the ground potential, and the second end of the feeding radiating portion is coupled to the second end of the feeding radiating portion.

In some embodiments, the second radiation portion has a first end and a second end, wherein the first end of the second radiation portion is coupled to the second end of the feeding radiation portion, and the second end of the second radiation portion is an open end.

In some embodiments, the antenna structure covers a first frequency band between 2400MHz and 2500MHz and a second frequency band between 5150MHz and 5850 MHz.

In some embodiments, the length of the slot is approximately equal to 0.25 wavelengths of the first frequency band.

In some embodiments, the height of the antenna structure is less than or equal to 6 mm.

Drawings

Fig. 1 shows a perspective view of a mobile device according to an embodiment of the invention.

Fig. 2 is a schematic diagram illustrating a lower portion of a mobile device according to an embodiment of the invention.

Fig. 3 is a schematic diagram of an upper portion of a mobile device according to an embodiment of the invention.

Fig. 4 shows a side view of a mobile device according to an embodiment of the invention.

Fig. 5 shows a return loss diagram of an antenna structure of a mobile device according to an embodiment of the invention.

Fig. 6 shows a radiation efficiency diagram of an antenna structure of a mobile device according to an embodiment of the invention.

Description of reference numerals:

100-a mobile device;

110-metal machine components;

111-the edge of a metal machine component;

120-slotted hole;

121-the open end of the slot;

122-closed end of slot;

130-feed radiation part;

131-a first end of the feed-in radiation part;

132-a second end of the feed-in radiating part;

140 to a first radiation section;

141 to a first end of the first radiating section;

142 to the second end of the first radiating section;

150 to a second radiation section;

151 to a first end of the second radiating section;

152 to a second end of the second radiating section;

170-dielectric substrate;

190-signal source;

d1-a first spacing;

d2-second spacing;

e1-first surface;

e2-a second surface;

FB1 — first frequency band;

FB 2-second band;

FP-feed point;

h1-height;

LS-length;

VSS to ground potential;

WS width.

Detailed Description

In order to make the objects, features and advantages of the present invention comprehensible, specific embodiments accompanied with figures are described in detail below.

Certain terms are used throughout the description and the following claims to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The present specification and the related application do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The term "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to achieve the basic technical result. In addition, the term "coupled" is used herein to encompass any direct or indirect electrical connection. Thus, if a first device couples to a second device, that connection may be through a direct electrical connection, or through an indirect electrical connection via other devices and connections.

Fig. 1 shows a perspective view of a mobile device 100 according to an embodiment of the invention. Fig. 2 is a schematic diagram illustrating a lower portion of the mobile device 100 according to an embodiment of the invention. Fig. 3 is a schematic diagram of an upper portion of the mobile device 100 according to an embodiment of the invention. Fig. 4 shows a side view of the mobile device 100 according to an embodiment of the invention. Please refer to fig. 1, fig. 2, fig. 3, and fig. 4. The mobile device 100 may be a Smart Phone (Smart Phone), a Tablet Computer (Tablet Computer), or a Notebook Computer (Notebook Computer). In the embodiments of fig. 1, 2, 3, 4, the mobile device 100 comprises: a Metal mechanical Element (Metal mechanical Element)110, a Feeding Radiation Element (Feeding Radiation Element)130, a first Radiation Element (Radiation Element)140, a second Radiation Element 150, and a Dielectric Substrate (Dielectric Substrate) 170. It must be understood that although not shown in fig. 1, 2, 3, 4, in practice the mobile device 100 may also comprise other elements, such as: a Processor (Processor), a Touch Control Panel (Touch Panel), a Speaker (Speaker), a Battery Module (Battery Module), and a Housing (Housing).

The metal machine component 110 may be an Appearance Element (Appearance Element) of the mobile device 100. It should be noted that the term "appearance element" in this specification refers to a portion of the mobile device 100 that is directly visible to the user's eyes. In some embodiments, the metal component 110 is a metal top cover of a notebook computer or a metal back cover of a tablet computer, but is not limited thereto. For example, if the mobile device 100 is a notebook computer, the metal machine component 110 may be a so-called "a-piece" in the field of notebook computers. The metal machine component 110 has a slot 120, wherein the slot 120 of the metal machine component 110 may be substantially in the shape of a straight strip. The slot 120 and an edge 111 of the metal machine component 110 may be substantially parallel to each other. In detail, the Slot 120 may be an Open Slot (Open Slot) and has an Open End (Open End)121 and a Closed End (Closed End)122 that are far away from each other. The mobile device 100 may also include a non-conductive material filled in the slot 120 of the metal machine component 110 to achieve the waterproof or dustproof function.

The feeding radiation part 130, the first radiation part 140, and the second radiation part 150 are made of metal materials, such as: copper, silver, aluminum, iron, or alloys thereof. The dielectric substrate 170 may be an FR4 (film resistor 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 feeding radiating portion 130, the first radiating portion 140, and the second radiating portion 150 are 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 metal machine component 110. It should be noted that the term "adjacent" or "adjacent" in this specification may refer to a distance between two corresponding elements being less than a predetermined distance (e.g., 5mm or less), and may also include the case where two corresponding elements are in direct contact with each other (i.e., the distance is shortened to 0). In some embodiments, the second surface E2 of the dielectric substrate 170 is directly attached to the metal machine component 110 such that the dielectric substrate 170 at least partially covers the slot 120 of the metal machine component 110.

A Ground Voltage (VSS) of the mobile device 100 may be provided by a Ground Element (not shown), wherein the Ground Element may be coupled to the metal machine component 110. For example, the grounding element may be a Ground Copper Foil (Ground Copper Foil) that extends from the dielectric substrate 170 to the metal frame member 110.

The feeding radiating part 130 may be substantially in the shape of a straight bar. The Feeding 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 Feeding radiating portion 130, and the Feeding Point FP is further coupled to a Signal Source (Signal Source) 190. For example, the signal source 190 may be a Radio Frequency (RF) module, which may be used to excite an Antenna Structure (Antenna Structure) of the mobile device 100. In some embodiments, the feeding radiating portion 130 has a Vertical Projection (Vertical Projection) on the metal machine component 110, wherein the Vertical Projection of the feeding radiating portion 130 is adjacent to the closed end 122 of the slot 120. In other embodiments, the vertical projection of the feeding radiation part 130 can also cover the closed end 122 of the slot 120.

The first radiation portion 140 may substantially have an L-shape, and may be partially parallel to the feeding radiation portion 130 and partially perpendicular to the feeding radiation portion 130. The first radiating portion 140 extends across the slot 120 of the metal machine member 110. That is, the first radiation portion 140 has a vertical projection on the metal machine component 110, wherein the vertical projection of the first radiation portion 140 can at least partially overlap with the slot 120 of the metal machine component 110. In detail, the first radiation portion 140 has a first end 141 and a second end 142, wherein the first end 141 of the first radiation portion 140 is coupled to the ground potential VSS, and the second end 142 of the first radiation portion 140 is coupled to the second end 132 of the feeding radiation portion 130, so that the feeding radiation portion 130 can be coupled to the ground potential VSS through the first radiation portion 140.

The second radiation portion 150 may be substantially in the shape of a straight bar or a rectangle, which may be substantially perpendicular to the feeding radiation portion 130. In detail, the second radiation portion 150 has a first End 151 and a second End 152, wherein the first End 151 of the second radiation portion 150 is coupled to the second End 132 of the feeding radiation portion 130, and the second End 152 of the second radiation portion 150 is an Open End (Open End) and extends in a direction away from the feeding radiation portion 130 and the first radiation portion 140.

In the preferred embodiment, the feeding radiating element 130, the first radiating element 140, the second radiating element 150, and the slot 120 of the metal machine element 110 together form an antenna structure of the mobile device 100, wherein the slot 120 of the metal machine element 110 is excited by the feeding radiating element 130 and the first radiating element 140 through coupling.

Fig. 5 shows a Return Loss (Return Loss) diagram of an antenna structure of the mobile device 100 according to an embodiment of the invention, wherein the horizontal axis represents operating frequency (MHz) and the vertical axis represents Return Loss (dB). According to the measurement results of FIG. 5, the antenna structure of the mobile device 100 can cover a first Frequency Band (Frequency Band) FB1 and a second Frequency Band FB2 when excited by the signal source 190, wherein the first Frequency Band FB1 can be between 2400MHz and 2500MHz, and the second Frequency Band FB2 can be between 5150MHz and 5850 MHz. Therefore, the antenna structure of the mobile device 100 can support at least a Wide band operation of WLAN (Wireless Wide Area network)2.4GHz/5 GHz.

In terms of antenna principle, the feeding radiating element 130, the first radiating element 140, the second radiating element 150, and the slot 120 of the metal machine element 110 can be excited together to generate a Fundamental resonance Mode (Fundamental resonance Mode) to form the aforementioned first frequency band FB 1. In addition, the feeding radiating portion 130, the first radiating portion 140, the second radiating portion 150, and the slot 120 of the metal machine component 110 can also jointly excite and generate a high-Order resonance Mode (frequency doubling effect) to form the aforementioned second frequency band FB2, wherein the second radiating portion 150 can be used to adjust Impedance Matching (Impedance Matching) of the second frequency band FB2 and increase an operating Bandwidth (Operation Bandwidth) of the second frequency band FB 2.

Fig. 6 shows a Radiation Efficiency (Radiation Efficiency) diagram of an antenna structure of the mobile device 100 according to an embodiment of the present invention, wherein the horizontal axis represents operating frequency (MHz) and the vertical axis represents Radiation Efficiency (dB). According to the measurement results shown in fig. 6, the radiation efficiency of the antenna structure of the mobile device 100 in the first frequency band FB1 and the second frequency band FB2 can reach-4 dB or higher, which satisfies the practical application requirements of the conventional WLAN communication.

In some embodiments, the dimensions of the elements of the mobile device 100 may be as follows. The length LS of the slot 120 of the metal machine member 110 (i.e., the length from the open end 121 to the closed end 122) may be substantially equal to 0.25 times the wavelength (λ/4) of the first frequency band FB1 of the antenna structure of the mobile device 100. The width WS of the slot 120 of the metal machine component 110 may be between 2mm to 3 mm. The total length of both the feeding radiating portion 130 and the first radiating portion 140 (i.e. the total length from the first end 131 to the first end 141 via the second end 142) may be between 8mm and 12mm, for example: 10 mm. The length of the second radiation portion 150 (i.e. the length from the first end 151 to the second end 152) may be between 2mm and 4mm, for example: 3 mm. A first distance D1 is defined from the first radiating portion 140 to the open end 121 of the slot 120, and a second distance D2 is defined from the first radiating portion 140 to the closed end 122 of the slot 120, wherein a ratio (D2/D1) between the second distance D2 and the first distance D1 is between 3 and 4. The first spacing D1 may be between 4mm to 6mm, for example: 5 mm. The height H1 of the antenna structure of the mobile device 100 may be less than or equal to 6 mm. The above range of device sizes is derived from a number of experimental results, which helps to optimize the operating bandwidth and impedance matching of the antenna structure of the mobile device 100.

The present invention provides a novel mobile device and antenna structure that can be integrated with a metal mechanism. Since the metal machine member can be considered as an extension of the antenna structure, it will not negatively affect the radiation performance of the antenna structure. According to the actual measurement result, the slot of the metal machine component is excited by the feeding mechanism similar to the loop, which can improve the capacitance of the antenna structure and further shrink the height of the antenna structure. Compared with the conventional design, the invention has the advantages of small size, wide frequency band, low posture, and beautiful appearance of the mobile device, so the invention is suitable for various mobile communication devices (especially the mobile device with narrow frame).

It is noted that the sizes, shapes and frequency ranges of the above-mentioned components are not limitations of the present invention. The antenna designer can adjust these settings according to different needs. The mobile device of the present invention is not limited to the states illustrated in fig. 1 to 6. The present invention may include only any one or more features of any one or more of the embodiments of fig. 1-6. In other words, not all illustrated features may be implemented in a mobile device of the present invention at the same time.

Ordinal numbers such as "first," "second," "third," etc., in the specification and in the claims, do not have a sequential relationship with each other, but are used merely to identify two different elements having the same name.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A mobile device, comprising:

a metal machine component having a slot, wherein the slot has an open end and a closed end;

a feed-in radiation part having a feed-in point;

a first radiation part extending across the slot of the metal machine component, wherein the feed radiation part is coupled to a ground potential via the first radiation part;

a second radiation part coupled to the feed radiation part; and

a dielectric substrate adjacent to the metal machine component, wherein the feed-in radiation part, the first radiation part and the second radiation part are all arranged on the dielectric substrate;

wherein the feed-in radiation part, the first radiation part, the second radiation part and the slot of the metal machine component form an antenna structure together.

2. The mobile device according to claim 1, wherein the feeding radiating portion has a straight strip shape.

3. The mobile device as claimed in claim 1, wherein the first radiating portion has an L-shape.

4. The mobile device as claimed in claim 1, wherein the second radiating portion has a straight bar shape.

5. The mobile device as claimed in claim 1, wherein the feeding radiating portion has a first end and a second end, and the feeding point is located at the first end of the feeding radiating portion.

6. The mobile device according to claim 5, wherein the first radiating portion has a first end and a second end, the first end of the feeding radiating portion is coupled to the ground potential, and the second end of the feeding radiating portion is coupled to the second end of the feeding radiating portion.

7. The mobile device according to claim 5, wherein the second radiating portion has a first end and a second end, the first end of the second radiating portion is coupled to the second end of the feeding radiating portion, and the second end of the second radiating portion is an open end.

8. The mobile device of claim 1, wherein the antenna structure covers a first frequency band between 2400MHz and 2500MHz and a second frequency band between 5150MHz and 5850 MHz.

9. The mobile device as claimed in claim 8, wherein the length of the slot is substantially equal to 0.25 times the wavelength of the first frequency band.

10. The mobile device of claim 1, wherein the height of the antenna structure is less than or equal to 6 mm.