CN114696077B

CN114696077B - Mobile device

Info

Publication number: CN114696077B
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: 2023-08-08
Anticipated expiration: 2040-12-30
Also published as: CN114696077A

Abstract

Embodiments of the present disclosure provide a mobile device. The mobile device includes: a grounding element, a first radiation part, a second radiation part, a coaxial cable, a connecting metal part and a dielectric substrate. The first radiation part is provided with a feed-in point. The second radiating portion is coupled to the grounding element and is adjacent to the first radiating portion, wherein the first radiating portion and the second radiating portion together form an antenna structure. The coaxial cable includes a center wire, a conductor housing, and an insulating outer layer, wherein the center wire is coupled to the feed point, and the conductor housing is at least partially covered by the insulating outer layer. The coaxial cable also has an exposed region without any insulating outer layer located in the exposed region, and the conductor housing in the exposed region is coupled to the second radiating portion via the connecting 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 are becoming increasingly popular in recent years, and common examples are: portable computers, mobile phones, multimedia players, and other portable electronic devices with mixed functionality. To meet the needs of people, mobile devices often have wireless communication capabilities. Some cover long range wireless communication ranges, such as: mobile phones use 2G, 3G, LTE (Long Term Evolution) systems and the frequency bands of 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz, and 2500MHz for communication, while some cover short range wireless communication ranges, such as: wi-Fi, bluetooth systems use the frequency bands of 2.4GHz, 5.2GHz, and 5.8GHz for communication.

Antennas are an indispensable element in mobile devices supporting wireless communications. However, the antenna is susceptible to adjacent metallic elements, which often causes the antenna elements to be disturbed and the overall communication quality to be degraded. In view of this, a completely new solution is needed to overcome the problems faced by the conventional techniques.

Disclosure of Invention

It is an aim of embodiments of the present disclosure to provide a mobile device to address at least one of the problems described above.

In a preferred embodiment, the present invention provides a mobile device, comprising: a grounding element; a first radiation part having a feed-in point; a second radiating portion coupled to the grounding element and adjacent to the first radiating portion, wherein the first radiating portion and the second radiating portion together form an antenna structure; a coaxial cable comprising a center conductor coupled to the feed point, a conductor housing at least partially surrounded by an insulating layer; a connection metal part, wherein the coaxial cable also has an exposed area, no insulating outer layer is positioned in the exposed area, and the conductor shell in the exposed area is coupled to the second radiation part through the connection metal part; and a dielectric substrate, wherein the first radiating portion, the second radiating portion and the connecting metal portion are all disposed on the dielectric substrate.

Compared with the traditional design, the mobile device provided by the invention has the advantages of at least 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 present invention

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

Fig. 4 is a schematic diagram of 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 numerals are as follows:

100 moving device

110 grounding element

120 a first radiation portion

121 first end of first radiating portion

122 the second end of the first radiating portion

130 a second radiation portion

131 first end of second radiating portion

132 a second end of the second radiation portion

140 coaxial cable

141 center conductor of coaxial cable

142 conductor housing for coaxial cable

143 insulating outer layer of coaxial cable

144 dielectric layer of coaxial cable

145 bare area of coaxial cable

148 specific section of coaxial cable

150 metal connecting portion

151 first end of metal connection part

152 second end of the metal connection

160 antenna structure

170 dielectric substrate

190 signal source

300 notebook computer

310 upper cover shell

320 display frame

330 keyboard frame

340 base shell

350 spindle 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-in point

GC1 coupling gap

L1, L2, L3 length

LC1 section line

Detailed Description

The following detailed description of the invention refers to the accompanying drawings, which illustrate specific embodiments of the invention.

Certain terms are used throughout the description and claims to refer to particular components. Those skilled in the art will appreciate that a hardware manufacturer may refer to the same element by different names. The description and claims do not take the form of an element differentiated by name, but rather by functional differences. 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 that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, and achieve the basic technical effect. In addition, the term "coupled" as used herein includes any direct or indirect electrical connection. Accordingly, 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 schematic diagram of 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 110, a first radiating portion (Radiation Element) 120, a second radiating portion 130, a Coaxial Cable 140, a connecting metal portion (Connection Metal Element) 150, and a dielectric substrate (Dielectric Substrate) 170, wherein the Ground Element 110, the first radiating portion 120, and the second radiating portion 130 are all made of metal materials, such as: copper, silver, aluminum, iron, or alloys thereof. It must 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 grounding copper foil (Ground Copper Foil), which may be further coupled to a system ground plane (System Ground Plane) (not shown) of the mobile device 100.

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

The second radiation portion 130 may substantially have a longer L-shape. In detail, the second radiating portion 130 has a first end 131 and a second end 132, wherein the first end 131 of the second radiating portion 130 is coupled to the grounding element 110, and the second end 132 of the second radiating 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 radiating portion 130 is adjacent to the first radiating portion 120, such that a Coupling Gap (Coupling Gap) may be formed between the second end 132 of the second radiating portion 130 and the second end 122 of the first radiating portion 120. It should be noted that the term "adjacent" or "adjacent" in this specification may refer to a case where the corresponding two elements are spaced less than a predetermined distance (for example, 5mm or less), but generally does not include a case where the corresponding two elements are in direct contact with each other (that is, the aforementioned spacing is shortened to 0). In the preferred embodiment, the first radiating portion 120 and the second radiating 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 a positive electrode and a negative electrode.

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. Thus, the antenna structure 160 of the mobile device 100 will support at least WLAN (Wireless Wide Area Network) 2.4GHz/5GHz broadband operation.

Fig. 2 is a cross-sectional view (along a section line LC1 of fig. 1) of a coaxial cable 140 according to an embodiment of the present invention. Please refer to fig. 1 and fig. 2 together. Coaxial cable 140 includes a center conductor (Central Conductive Line) 141, a conductor housing (Conductive Housing) 142, and an insulating outer layer (Isolation Outer Layer) 143. The positive pole of the signal source 190 may be coupled to the feed point FP via the center wire 141, and the negative pole of the signal source 190 may be coupled to the conductor housing 142. The conductor housing 142 is at least partially surrounded by an insulating outer layer 143. In some embodiments, coaxial cable 140 further includes a Dielectric Layer 144, and Dielectric Layer 144 is disposed between center conductor 141 and conductor housing 142. It should be noted that the coaxial cable 140 further has an exposed Region (Bare Region) 145, and the exposed Region 145 has been stripped, so that no insulating outer layer 143 is located in the exposed Region 145. That is, the user can directly visually observe the conductor housing 142 in the exposed region 145 (as not covered by the insulating outer layer 143). 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) that may include one or more interconnected U-shaped portions. In detail, the Connection metal portion 150 has a first end 151 and a second end 152, wherein the first end 151 of the Connection metal portion 150 is coupled to the conductor housing 142 in the exposed area 145, and the second end 152 of the Connection metal portion 150 is coupled to a Connection Point CP1 on the second radiation portion 130. For example, the connection point CP1 may be located at a right angle bend of the second radiation portion 130. Accordingly, the conductor housing 142 within the exposed region 145 may be coupled to the second radiating portion 130 via the connection metal portion 150. It must be understood that the remainder of the conductor housing 142 is not in direct contact with the ground element 110 (as it is separated by the insulating outer layer 143) except for the exposed region 145.

The dielectric substrate 170 may be an FR4 (frame reflector 4) substrate, a printed circuit board (Printed Circuit Board, PCB), or a flexible circuit board (Flexible Circuit Board, FCB), wherein the first radiating portion 120, the second radiating portion 130, and the connection metal portion 150 are 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 a top 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 "a piece", "B piece", "C piece", and "D piece", respectively, commonly known in the notebook computer arts. The antenna structure 160 may be disposed at a first location 351 or (and) a second location 352 of the notebook computer 300, and is adjacent to the rotation axis element 350. In some embodiments, the Notebook computer 300 is a mobile device (Convertible Mobile Device) that can be operated in a Notebook Mode (Notebook Mode), a Tablet Mode (Tablet Mode), or a Sharing Mode (Sharing Mode) (as shown in fig. 3). To maximize the display area, the hinge element 350 of the notebook computer 300 may be designed to be sunk.

Fig. 4 is a schematic diagram of an 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 (auxliary), the corresponding coaxial cable 140 may have to be designed longer.

Fig. 5 is a graph of Radiation Gain (Radiation Gain) of an antenna structure of a conventional mobile device, wherein the horizontal axis represents an operating frequency (MHz) and the vertical axis represents 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 shared mode. As can be seen from the measurement results of fig. 5, the antenna structure of the conventional mobile device may have an unstable radiation gain (particularly, the radiation gain is significantly reduced near the first frequency band) if 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 present 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 result of fig. 6, if the conductor housing 142 in the exposed area 145 is coupled to the grounding element 110 through the connection 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 regardless of whether the mobile device 100 is operated in the notebook mode, the tablet mode, or the sharing mode. The design of the present invention is therefore well suited for use in a variety of different communication environments (particularly where coaxial cable 140 is particularly long).

In some embodiments, the element dimensions of the mobile device 100 may be as follows. The length L1 of the first radiating portion 120 may be approximately equal to 0.25 times wavelength (λ/4) of the second frequency band of the antenna structure 160 of the mobile device 100. The length L2 of the second radiating portion 130 may be approximately 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 1mm. A specific section 148 of the coaxial cable 140 is defined as a portion between the exposed area 145 and the feed point FP, wherein the total length L3 of the specific section 148 and the connection metal portion 150 may be approximately equal to 0.5 times the 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 a number of experimental results, which helps to optimize the radiation stability, the operating bandwidth (Operation Bandwidth), and the 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 have the advantages of at least wide frequency band, low manufacturing cost, higher radiation gain, better radiation stability and the like, so that the novel mobile device and the antenna structure are very suitable for being applied to various mobile communication devices.

It should be noted that the device size, device shape, and frequency range are not limitations of the present invention. The antenna designer may adjust these settings according to different needs. The mobile device and antenna structure of the present invention are not limited to the states illustrated in fig. 1-6. 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 of the illustrated features need be implemented in the mobile device and antenna structure of the present invention at the same time.

Ordinal numbers such as "first," "second," "third," and the like in the description and in the claims are used for distinguishing between two different elements having the same name and not necessarily for describing a sequential order.

While the invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A mobile device, comprising:

a grounding element;

a first radiation part having a feed-in point;

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

a coaxial cable comprising a center conductor coupled to the feed point, a conductor housing at least partially surrounded by an insulating layer;

a connection metal part, wherein the coaxial cable also has an exposed area, no insulating outer layer is positioned in the exposed area, and the conductor shell in the exposed area is coupled to the second radiation part through the connection metal part; and

the first radiation part, the second radiation part and the connecting metal part are arranged on the dielectric substrate;

wherein the second radiation part is arranged between the first radiation part and the connecting metal part;

the dielectric substrate is positioned above the grounding element, wherein the first radiation part presents a shorter L shape, and the second radiation part presents a longer L shape;

except for the exposed area, the remaining portion of the conductor housing of the coaxial cable does not directly contact the ground element.

2. 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 1mm.

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

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

5. 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.

6. The mobile device of claim 5, 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.

7. The mobile device of claim 5, wherein a specific section of the coaxial cable is between the exposed area and the feeding point, and a total length of the specific section and the connecting metal portion is equal to 0.5 times the wavelength of the first frequency band.