CN114696077A

CN114696077A - Mobile device

Info

Publication number: CN114696077A
Application number: CN202011605852.5A
Authority: CN
Inventors: 张琨盛; 林敬基
Original assignee: Acer Inc
Current assignee: Acer Inc
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-07-01
Anticipated expiration: 2040-12-30
Also published as: CN114696077B

Abstract

The embodiment of the disclosure provides a mobile device. The mobile device includes: a grounding element, a first radiation portion, a second radiation portion, a coaxial cable, a connection metal portion and a dielectric substrate. The first radiation part has a feed point. The second radiation part is coupled to the grounding element and is adjacent to the first radiation part, wherein the first radiation part and the second radiation part jointly form an antenna structure. The coaxial cable includes a center conductor coupled to the feed point, a conductive shell at least partially covered by the insulating shell, and an insulating outer layer. The coaxial cable further has an exposed region without any insulating outer layer in the exposed region, and the conductor housing in the exposed region is coupled to the second radiation portion via the connection metal portion.

Description

Mobile device

Technical Field

The present disclosure relates to mobile devices, and particularly to a mobile device and an 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.

An antenna is an indispensable element in a mobile device supporting wireless communication. However, the antenna is susceptible to adjacent metal elements, which often causes the antenna elements to interfere and the overall communication quality to degrade. In view of the above, a new solution is needed to overcome the problems faced by the conventional technologies.

Disclosure of Invention

An object of the disclosed embodiments is to provide a mobile device to solve at least one of the above problems.

In a preferred embodiment, the present invention provides a mobile device, comprising: a grounding element; a first radiation part having a feed point; a second radiation part coupled to the ground element and adjacent to the first radiation part, wherein the first radiation part and the second radiation part together form an antenna structure; a coaxial cable comprising a central conductor, a conductor housing, and an insulating outer layer, wherein the central conductor is coupled to the feed point, and the conductor housing is at least partially covered by the insulating outer layer; a connecting metal part, wherein the coaxial cable further has an exposed region without any insulating outer layer located therein, and the conductor housing in the exposed region is coupled to the second radiation part via the connecting metal part; and a dielectric substrate, wherein the first radiation part, the second radiation part and the connecting metal part are all arranged on the dielectric substrate.

Compared with the conventional design, the mobile device provided by the invention at least has the advantages of wide frequency band, low manufacturing cost, higher radiation gain, better radiation stability and the like, so that the mobile device is very suitable for being applied to various mobile communication devices.

Drawings

Fig. 1 is a schematic diagram of a mobile device according to an embodiment of the invention.

Fig. 2 is a cross-sectional view of a coaxial cable according to an embodiment of the invention

Fig. 3 is a schematic diagram of a notebook computer according to an embodiment of the invention.

Fig. 4 is a schematic view illustrating an antenna structure applied to a notebook computer according to an embodiment of the invention.

Fig. 5 is a radiation gain diagram of an antenna structure of a conventional mobile device.

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

The reference numbers are as follows:

100 moving device

110 ground element

120 first radiation part

121 first end of first radiation part

122 second end of the first radiating portion

130 second radiation part

131 first end of the second radiation part

132 second end of the second radiation part

140 coaxial cable

141 center conductor of coaxial cable

142 conductor shell of coaxial cable

143 insulating outer layer of coaxial cable

144 dielectric layer of coaxial cable

145 exposed area of coaxial cable

148 specific section of coaxial cable

150 metal connecting part

151 first end of metal connection part

152 second end of the metal connecting part

160 antenna structure

170 dielectric substrate

190: signal source

300 notebook computer

310 casing of upper cover

320 display frame

330 keyboard frame

340 base shell

350 rotating shaft element

351 first position

352 second position

CC1 first curve

CC2 second curve

CC3 third Curve

CC4 fourth Curve

CC5 fifth Curve

CC6 sixth Curve

CP1 connection Point

FP feed point

GC1 coupling gap

L1, L2, L3 Length

LC1 section line

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 following claims to refer to particular components. As one skilled in the art will appreciate, hardware manufacturers may refer to a component by different names. The present specification and claims 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 is a diagram illustrating a mobile device 100 according to an embodiment of the invention. The mobile device 100 may be a smart phone, a tablet computer, or a notebook computer. As shown in fig. 1, the mobile device 100 includes: a Ground Element (Ground Element)110, a first Radiation portion (Radiation Element)120, a second Radiation portion 130, a Coaxial Cable (Coaxial Cable)140, a Connection Metal portion (Connection Metal Element)150 and a Dielectric Substrate (Dielectric Substrate)170, wherein the Ground Element 110, the first Radiation portion 120 and the second Radiation portion 130 are all made of Metal materials, such as: copper, silver, aluminum, iron, or alloys thereof. It should be understood that although not shown in fig. 1, the mobile device 100 may further include other elements, such as: the device comprises a processor, a touch panel, a loudspeaker, a battery module and a shell.

The grounding element 110 may be implemented by a Ground Copper Foil (not shown), which may be further coupled to a System Ground Plane (not shown) of the mobile device 100.

The first radiation portion 120 may substantially have a short L-shape. In detail, the first radiation portion 120 has a first End 121 and a second End 122, wherein a Feeding Point (Feeding Point) FP is located at the first End 121 of the first radiation portion 120, and the second End 122 of the first radiation portion 120 is an Open End (Open End).

The second radiation portion 130 may substantially have a long L-shape. In detail, the second radiation portion 130 has a first end 131 and a second end 132, wherein the first end 131 of the second radiation portion 130 is coupled to the ground element 110, and the second end 132 of the second radiation portion 130 is an open end. The second end 132 of the second radiating portion 130 and the second end 122 of the first radiating portion 120 may extend in substantially the same direction. The second radiation part 130 is adjacent to the first radiation part 120, such that a Coupling Gap (Coupling Gap) may be formed between the second end 132 of the second radiation part 130 and the second end 122 of the first radiation part 120. It should be noted that the term "adjacent" or "adjacent" in this specification may refer to a distance between two corresponding elements that is less than a predetermined distance (e.g., 5mm or less), but generally does not include a case where two corresponding elements are in direct contact with each other (i.e., the distance is reduced to 0). In the preferred embodiment, the first radiation portion 120 and the second radiation portion 130 together form an Antenna Structure (Antenna Structure)160 of the mobile device 100, which can be excited by a Signal Source (Signal Source) 190. For example, the signal source 190 may be a Radio Frequency (RF) module having an anode and a cathode.

In some embodiments, the antenna structure 160 of the mobile device 100 may cover a first frequency band and a second frequency band. For example, the first frequency band may be between 2400MHz and 2500MHz, and the second frequency band may be between 5150MHz and 5850 MHz. Therefore, the antenna structure 160 of the mobile device 100 will support at least a Wide band operation of WLAN (Wireless Wide Area network)2.4GHz/5 GHz.

Fig. 2 is a cross-sectional view (along a section line LC1 in fig. 1) of the coaxial cable 140 according to an embodiment of the invention. Please refer to fig. 1 and fig. 2 together. The coaxial cable 140 includes a Central Conductive Line (Central Conductive Line)141, a Conductive Housing (Conductive Housing)142, and an insulating Outer Layer (Isolation Outer Layer) 143. The anode of the signal source 190 may be coupled to the feed point FP through the center wire 141, and the cathode of the signal source 190 may be coupled to the conductor housing 142. The conductor housing 142 is at least partially covered by an insulating outer layer 143. In some embodiments, the coaxial cable 140 further includes a Dielectric Layer (Dielectric Layer)144, and the Dielectric Layer 144 is disposed between the central conductor 141 and the conductor housing 142. It should be noted that the coaxial cable 140 also has a Bare Region (bareregion) 145, and the Bare Region 145 is stripped so that no insulating outer layer 143 is located in the Bare Region 145. That is, the conductor housing 142 in the exposed region 145 (as not covered by the insulating outer layer 143) is directly visible to the user. In some embodiments, the exposed region 145 is disposed away from the ground element 110.

The connecting metal portion 150 may generally exhibit a serpentine Shape (Meandering Shape), which may include one or more interconnected U-shaped portions. In detail, the Connection metal part 150 has a first end 151 and a second end 152, wherein the first end 151 of the Connection metal part 150 is coupled to the conductor housing 142 in the exposed region 145, and the second end 152 of the Connection metal part 150 is coupled to a Connection Point (Connection Point) CP1 on the second radiation part 130. For example, the connection point CP1 may be located at a right angle bend of the second radiating portion 130. Accordingly, the conductive housing 142 in the exposed region 145 may be coupled to the second radiation portion 130 via the connection metal portion 150. It should be understood that the remaining portion of the conductive shell 142, except for the exposed region 145, does not directly contact the ground element 110 (because it is separated by the insulating outer layer 143).

The dielectric substrate 170 may be an FR4 (film resistor 4) substrate, a Printed Circuit Board (PCB), or a Flexible Circuit Board (FCB), wherein the first radiation portion 120, the second radiation portion 130, and the connection metal portion 150 may be disposed on the same surface of the dielectric substrate 170.

Fig. 3 is a schematic diagram of a notebook computer 300 according to an embodiment of the invention. In the embodiment of fig. 3, the antenna structure 160 can be applied to a notebook computer 300, wherein the notebook computer 300 includes an Upper Cover Housing (Upper Cover Housing)310, a Display Frame (Display Frame)320, a Keyboard Frame (Keyboard Frame)330, a Base Housing (Base Housing)340, and a Hinge Element (Hinge Element) 350. It should be understood that the top cover housing 310, the display bezel 320, the keyboard bezel 330 and the base housing 340 are equivalent to the commonly known "parts a", "B", "C" and "D" respectively in the field of notebook computers. The antenna structure 160 may be disposed at a first position 351 or (and) a second position 352 of the notebook computer 300, and is adjacent to the hinge element 350. In some embodiments, the Notebook computer 300 is a Convertible Mobile Device (Convertible Mobile Device) that can operate in a Notebook Mode (Notebook Mode), a Tablet Mode (Tablet Mode), or a Sharing Mode (Sharing Mode) (shown in FIG. 3). In order to maximize the display area, the hinge member 350 of the notebook computer 300 may use a sink design.

Fig. 4 is a schematic diagram of the antenna structure 160 applied to a notebook computer 300 according to an embodiment of the invention. If the antenna structure 160 is used as an Auxiliary antenna (Auxiliary), the corresponding coaxial cable 140 may have to be designed to be longer.

Fig. 5 is a Radiation Gain (Radiation Gain) graph of an antenna structure of a conventional mobile device, in which the horizontal axis represents an operating frequency (MHz) and the vertical axis represents a Radiation Gain (dB). As shown in fig. 5, a first curve CC1 represents the radiation gain of the antenna structure of the conventional mobile device in the notebook mode, a second curve CC2 represents the radiation gain of the antenna structure of the conventional mobile device in the tablet mode, and a third curve CC3 represents the radiation gain of the antenna structure of the conventional mobile device in the sharing mode. As can be seen from the measurement results shown in fig. 5, the antenna structure of the conventional mobile device may have an unstable radiation gain (especially, the radiation gain is significantly reduced near the aforementioned first frequency band) under the condition that the corresponding coaxial cable is too long.

Fig. 6 is a radiation gain diagram of the antenna structure 160 of the mobile device 100 according to an embodiment of the invention, wherein the horizontal axis represents the operating frequency (MHz) and the vertical axis represents the radiation gain (dB). As shown in fig. 6, a fourth curve CC4 represents the radiation gain of the antenna structure 160 of the mobile device 100 in the notebook mode, a fifth curve CC5 represents the radiation gain of the antenna structure 160 of the mobile device 100 in the tablet mode, and a sixth curve CC6 represents the radiation gain of the antenna structure 160 of the mobile device 100 in the sharing mode. As can be seen from the measurement results shown in fig. 6, if the conductive shell 142 in the exposed region 145 is coupled to the grounding element 110 through the connecting metal portion 150 and the second radiation portion 130, the interference of the coaxial cable 140 on the radiation performance of the antenna structure 160 can be effectively avoided. On the other hand, the radiation gain of the antenna structure 160 in the first frequency band can be kept stable no matter the mobile device 100 operates in the notebook mode, the tablet mode, or the sharing mode. Accordingly, the design of the present invention is well suited for use in a variety of different communication environments (particularly given the particularly long length of coaxial cable 140).

In some embodiments, the dimensions of the elements of the mobile device 100 may be as follows. The length L1 of the first radiation part 120 may be substantially equal to 0.25 times the wavelength (λ/4) of the second frequency band of the antenna structure 160 of the mobile device 100. The length L2 of the second radiation part 130 may be substantially equal to 0.25 times the wavelength (λ/4) of the first frequency band of the antenna structure 160 of the mobile device 100. The width of the coupling gap GC1 may be less than or equal to 1 mm. A specific segment 148 of the coaxial cable 140 is defined as a portion between the exposed region 145 and the feed point FP, wherein a total length L3 of the specific segment 148 and the connecting metal part 150 may be substantially equal to 0.5 times a wavelength (λ/2) of the first frequency band of the antenna structure 160 of the mobile device 100. The above range of element sizes is derived from multiple experimental results, which helps to optimize radiation stability, operating Bandwidth (Operation Bandwidth), and Impedance Matching (Impedance Matching) of the antenna structure 160 of the mobile device 100.

Compared with the traditional design, the novel mobile device and the antenna structure at least have the advantages of wide frequency band, low manufacturing cost, higher radiation gain, better radiation stability and the like, so the novel mobile device and the antenna structure are very suitable for being applied to various mobile communication devices.

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 and the antenna structure of the present invention are not limited to the states illustrated in fig. 1 to 6. The present invention may include only any one or more of the features of any one or more of the embodiments of fig. 1-6. In other words, not all illustrated features may be implemented in the mobile device and antenna structure of the present invention.

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 grounding element;

a first radiation part having a feed point;

a second radiation part coupled to the grounding element and adjacent to the first radiation part, wherein the first radiation part and the second radiation part together form an antenna structure;

a coaxial cable comprising a central conductor, a conductor housing, and an insulating outer layer, wherein the central conductor is coupled to the feed point, and the conductor housing is at least partially covered by the insulating outer layer;

a connecting metal part, wherein the coaxial cable further has an exposed region without any insulating outer layer located therein, and the conductor housing in the exposed region is coupled to the second radiation part via the connecting metal part; and

a dielectric substrate, wherein the first radiation portion, the second radiation portion and the connection metal portion are disposed on the dielectric substrate.

2. The mobile device as claimed in claim 1, wherein the first radiating portion has a shorter L-shape.

3. The mobile device as claimed in claim 1, wherein the second radiating portion has a longer L-shape.

4. The mobile device of claim 1, wherein a coupling gap is formed between the second radiating portion and the first radiating portion, and a width of the coupling gap is less than or equal to 1 mm.

5. The mobile device of claim 1, wherein the connecting metal portion exhibits a serpentine shape.

6. The mobile device of claim 1, wherein the coaxial cable further comprises a dielectric layer disposed between the center conductor and the conductor housing.

7. The mobile device of claim 1, wherein no portion of the conductor housing of the coaxial cable directly contacts the ground element except for the exposed area.

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 according to claim 8, wherein the length of the first radiating portion is equal to 0.25 times the wavelength of the second frequency band, and the length of the second radiating portion is equal to 0.25 times the wavelength of the first frequency band.

10. The mobile device as claimed in claim 8, wherein a specific section of the coaxial cable is located between the exposed region and the feeding point, and a total length of the specific section and the connecting metal portion is equal to 0.5 times a wavelength of the first frequency band.