CN112397888B

CN112397888B - Mobile device

Info

Publication number: CN112397888B
Application number: CN201910763200.5A
Authority: CN
Inventors: 张琨盛; 林敬基
Original assignee: Acer Inc
Current assignee: Acer Inc
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2023-02-28
Anticipated expiration: 2039-08-19
Also published as: CN112397888A

Abstract

A mobile device, comprising: a common grounding part, a connecting part, a first radiation part, a second radiation part, a third radiation part, a fourth radiation part and a medium substrate. The common ground is coupled to a ground potential. The first radiation part is provided with a first feed-in point, wherein the first radiation part is coupled to the common grounding part through the connecting part. The second radiation part is coupled to the first feed point, wherein the second radiation part is at least partially surrounded by the first radiation part. The third radiation part is provided with a second feed-in point. The fourth radiating portion is adjacent to the third radiating portion, wherein the fourth radiating portion is coupled to the common ground portion. The common grounding part, the connecting part, the first radiation part, the second radiation part, the third radiation part and the fourth radiation part form an antenna structure arranged on the medium substrate together.

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 to perform communication, and some mobile phones 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 (Antenna) is an indispensable element in the field of wireless communication. If the Bandwidth (Bandwidth) of the antenna for receiving or transmitting signals is insufficient, the communication quality of the mobile device is easily degraded. Therefore, how to design a small-sized and wide-band antenna element is an important issue for an antenna designer.

Disclosure of Invention

In a preferred embodiment, the present invention provides a mobile device, comprising: a common ground coupled to a ground potential; a connecting part; a first radiation part having a first feed point, wherein the first radiation part is coupled to the common ground part via the connection part; a second radiation part coupled to the first feed point, wherein the second radiation part is at least partially surrounded by the first radiation part; a third radiation part with a second feed point; a fourth radiating portion adjacent to the third radiating portion, wherein the fourth radiating portion is coupled to the common ground portion; and a dielectric substrate; wherein the common grounding part, the connecting part, the first radiation part, the second radiation part, the third radiation part and the fourth radiation part form an antenna structure together; the antenna structure is arranged on the dielectric substrate.

In some embodiments, the common ground portion has a straight bar shape.

In some embodiments, the common ground has a first side and a second side opposite to each other, the connecting portion, the first radiating portion, and the second radiating portion are disposed at the first side of the common ground, and the third radiating portion and the fourth radiating portion are disposed at the second side of the common ground.

In some embodiments, the first radiation portion has an inverted U-shape and defines a gap region, and the second radiation portion is located inside the gap region.

In some embodiments, the fourth radiating portion is separated from the third radiating portion, and a coupling gap is formed between the third radiating portion and the fourth radiating portion.

In some embodiments, the antenna structure covers a first frequency band between 1710MHz and 2170MHz, a second frequency band between 2300MHz and 2700MHz, a third frequency band between 2400MHz and 2500MHz, and a fourth frequency band between 5150MHz and 5850 MHz.

In some embodiments, the first frequency band is generated by excitation of the first radiating portion, and the length of the first radiating portion is approximately equal to 0.25 times the wavelength of the first frequency band.

In some embodiments, the second frequency band is excited by the second radiating portion, and the length of the second radiating portion is approximately equal to 0.25 times the wavelength of the second frequency band.

In some embodiments, the third frequency band is generated by excitation of the fourth radiation portion and the common ground portion, and a total length of the fourth radiation portion and the common ground portion is substantially equal to 0.25 times a wavelength of the third frequency band.

In some embodiments, the fourth frequency band is excited by the third radiating portion, and the length of the third radiating portion is substantially equal to 0.25 times the wavelength of the fourth frequency band.

Drawings

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

Fig. 2 shows a return loss diagram of an antenna structure of a mobile device according to an embodiment of the invention.

Fig. 3 shows a return loss diagram of an antenna structure of a mobile device according to an embodiment of the invention.

Fig. 4 shows a radiation efficiency diagram of an antenna structure of a mobile device according to an embodiment of the invention.

Fig. 5 is a diagram illustrating the radiation efficiency of an antenna structure of a mobile device according to an embodiment of the invention.

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

Fig. 7 is a perspective view of a mobile device according to another embodiment of the invention.

Description of the reference numerals:

100. 700-a mobile device;

110 to a common ground part;

111 to a first end of the common ground;

112-a second end of the common ground;

115-a first side of the common ground;

116-a second side of the common ground;

120-a connecting part;

130 to a first radiation section;

131 to the first end of the first radiating section;

132 to a second end of the first radiating section;

135-notch area;

136-a bent portion of the first radiating portion;

140 to a second radiation section;

141 to a first end of the second radiating section;

142 to a second end of the second radiating section;

150 to a third radiation section;

151 to a first end of the third radiating portion;

152 to a second end of the third radiating portion;

160 to a fourth radiation section;

161 to a first end of the fourth radiating section;

162 to a second end of the fourth radiating portion;

170-a dielectric substrate;

191-a first signal source;

192-a second signal source;

710 to an upper cover;

720-base;

720-edge of the base;

730-a spindle element;

751-first position;

752 to a second position;

d1-spacing;

FB1 to a first frequency band;

FB2 to a second frequency band;

FB3 to a third frequency band;

FB4 to a fourth frequency band;

FP 1-first feed-in point;

FP 2-second feed-in point;

GC 1-coupling gap;

LT to total length;

VSS to ground potential;

WT vs. total width.

Detailed Description

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

Certain terms are used throughout the description and 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 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 shows a top view of a mobile device 100 according to an embodiment of the invention. For example, the mobile device 100 may be a Smart Phone (Smart Phone), a Tablet Computer (Tablet Computer), or a Notebook Computer (Notebook Computer). As shown in fig. 1, the mobile device 100 includes at least: a Common Ground Element (Common Ground Element) 110, a Connection Element (Connection Element) 120, a first Radiation Element (Radiation Element) 130, a second Radiation Element 140, a third Radiation Element 150, a fourth Radiation Element 160, and a Dielectric Substrate (Dielectric Substrate) 170, wherein the Common Ground Element 110, the Connection Element 120, the first Radiation Element 130, the second Radiation Element 140, the third Radiation Element 150, and the fourth Radiation Element 160 may be made of metal material, such as copper, silver, aluminum, iron, or alloy thereof. The dielectric substrate 170 may be an FR4 (film resistor 4) substrate, a Printed Circuit Board (PCB), or a Flexible Circuit Board (FCB). It must be understood that although not shown in fig. 1, the mobile device 100 may also include other elements, such as: a Display Device (Display Device), a Speaker (Speaker), a Touch Control Module (Touch Control Module), a Power Supply Module (Power Supply Module), and a Housing (Housing).

The common ground 110 may substantially have a straight bar shape. The common Ground 110 has a first end 111 and a second end 112, wherein the first end 111 of the common Ground 110 is coupled to a Ground potential (Ground Voltage) VSS. For example, the Ground potential VSS may be provided by a System Ground Plane (not shown) of the mobile device 100. In detail, the common ground 110 has a first side 115 and a second side 116 opposite to each other, wherein the connection portion 120, the first radiation portion 130, and the second radiation portion 140 are disposed at the first side 115 (e.g., left side) of the common ground 110, and the third radiation portion 150 and the fourth radiation portion 160 are disposed at the second side 116 (e.g., right side) of the common ground 110. It should be noted that the first radiation portion 130 and the fourth radiation portion 160 can be both coupled to the ground potential VSS via the common ground portion 110.

The connecting portion 120 may substantially exhibit a rectangular shape or a square shape. The first radiation portion 130 may substantially have an inverted U-shape and define a gap region 135, the gap region 135 may substantially have a rectangular shape, and the second radiation portion 140 may be completely located inside the gap region 135 of the first radiation portion 130. The first radiation portion 130 has a first Feeding Point (FP 1), and the first Feeding Point FP1 can be further coupled to a first Signal Source (Signal Source) 191. In detail, the first radiation portion 130 has a first End 131 and a second End 132, wherein the first feed point FP1 is located at the first End 131 of the first radiation portion 130, and the second End 132 of the first radiation portion 130 is an Open End (Open End). In addition, a bent portion 136 of the first radiating portion 130 can be coupled to the second end 112 of the common ground portion 110 through the connecting portion 120.

The second radiation portion 140 may substantially present a C-shape, wherein the second radiation portion 140 is at least partially surrounded by the first radiation portion 130. In detail, the second radiation portion 140 has a first end 141 and a second end 142, wherein the first end 141 of the second radiation portion 140 is coupled to the first feed point FP1 and the first end 131 of the first radiation portion 130, and the second end 142 of the second radiation portion 140 is an open end. In addition, the second end 142 of the second radiation portion 140 is adjacent to the bent portion 136 of the first radiation portion 130. 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 the case where the two corresponding elements are in direct contact with each other (i.e., the distance is reduced to 0).

The third radiation portion 150 may have a substantially straight bar shape, which may be substantially perpendicular to the common ground portion 110. The third radiating portion 150 has a second feeding point FP2, and the second feeding point FP2 is further coupled to a second signal source 192. In detail, the third radiation portion 150 has a first end 151 and a second end 152, wherein the second feed point FP2 is located at the first end 151 of the third radiation portion 150, and the second end 152 of the third radiation portion 150 is an open end and extends in a direction away from the common ground portion 110.

The fourth radiation portion 160 may substantially present an inverted C-shape, which may be at least partially perpendicular to the common ground portion 110 and at least partially parallel to the third radiation portion 150. The fourth radiation portion 160 is adjacent to the third radiation portion 150 but separated from the third radiation portion 150, wherein a Coupling Gap (Coupling Gap) GC1 is formed between the third radiation portion 150 and the fourth radiation portion 160. In detail, the fourth radiation portion 160 has a first end 161 and a second end 162, wherein the first end 161 of the fourth radiation portion 160 is coupled to the second end 112 of the common ground portion 110, and the second end 162 of the fourth radiation portion 160 is an open end and extends toward the common ground portion 110.

In some embodiments, the common ground portion 110, the connection portion 120, the first radiation portion 130, the second radiation portion 140, the third radiation portion 150, and the fourth radiation portion 160 together form an Antenna Structure (Antenna Structure), and the Antenna Structure is Planar and disposed on a surface of the dielectric substrate 170.

Fig. 2 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 result of FIG. 2, when excited by the first signal source 191, the antenna structure of the mobile device 100 can cover a first Frequency Band (Frequency Band) FB1 and a second Frequency Band FB2, wherein the first Frequency Band FB1 can be between 1710MHz and 2170MHz, and the second Frequency Band FB2 can be between 2300MHz and 2700 MHz. Therefore, the antenna structure of the mobile device 100 can support at least the MIMO (Multi-Input and Multi-Output) dual-band operation of WWAN (Wireless Wide Area Network).

Fig. 3 shows a return loss diagram of an antenna structure 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 return loss (dB). According to the measurement results shown in fig. 3, when excited by the second signal source 192, the antenna structure of the mobile device 100 covers a third frequency band FB3 and a fourth frequency band FB4, wherein the third frequency band FB3 may be between 2400MHz and 2500MHz, and the fourth frequency band FB4 may be between 5150MHz and 5850 MHz. Therefore, the antenna structure of the mobile device 100 will support at least the 2.4GHz/5GHz dual-band WLAN (Wireless Local Area Networks) operation.

In some embodiments, the principles of operation of the antenna structure of the mobile device 100 may be as follows. The first frequency band FB1 can be generated by the first radiation portion 130. The second frequency band FB2 can be excited by the second radiation part 140. The third frequency band FB3 may be excited by the fourth radiation portion 160 and the common ground portion 110. The fourth frequency band FB4 can be excited by the third radiation part 150. According to the actual measurement result, the common ground 110 not only serves as a ground resonance Path (ground resonance Path) of the third frequency band FB3, but also is used for fine tuning the Impedance Matching (Impedance Matching) of the first frequency band FB1 and the second frequency band FB 2. Thus, the addition of the common ground 110 helps to shrink the overall size of the antenna structure of the mobile device 100.

Fig. 4 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. 4, 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 about-4 dB, which can satisfy the practical application requirements of the general WWAN communication.

Fig. 5 shows a radiation efficiency graph of an antenna structure 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 efficiency (dB). According to the measurement results shown in fig. 5, the radiation efficiency of the antenna structure of the mobile device 100 in the third frequency band FB3 and the fourth frequency band FB4 can reach about-3.5 dB, which can satisfy the practical application requirements of the general WLAN communication.

Fig. 6 shows an Isolation diagram of the antenna structure of the mobile device 100 according to an embodiment of the invention, wherein the horizontal axis represents an operating frequency (MHz) and the vertical axis represents an Isolation (dB), according to the measurement result of fig. 6, when the first signal source 191 and the second signal source 192 are fed simultaneously, the Isolation of the antenna structure of the mobile device 100 in the first frequency band FB1, the second frequency band FB2, the third frequency band FB3, and the fourth frequency band FB4 can reach at least 8dB, which means that the first signal source 191 and the second signal source 192 are not easily interfered with each other, so that the overall radiation performance of the antenna structure of the mobile device 100 can be improved.

In some embodiments, the dimensions of the elements of the mobile device 100 are as follows. The length of the first radiating portion 130 (i.e., the length from the first end 131 to the second end 132) is 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 length of the second radiation portion 140 (i.e., the length from the first end 141 to the second end 142) is substantially equal to 0.25 times the wavelength (λ/4) of the second frequency band FB2 of the antenna structure of the mobile device 100. The length of the third radiating portion 150 (i.e., the length from the first end 151 to the second end 152) is substantially equal to 0.25 times the wavelength (λ/4) of the fourth frequency band FB4 of the antenna structure of the mobile device 100. The total length of the fourth radiating portion 160 and the common ground portion 110 (i.e., the total length from the first end 111, through the second end 112 and the first end 161, and then to the second end 162) is substantially 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 distance D1 between the first radiation portion 130 and the common ground portion 110 (or the length of the connection portion 120) may be between 2mm and 3 mm. The width of the coupling gap GC1 (or the interval between the third and fourth radiation portions 150 and 160) may be less than or equal to 2mm. The total length LT of the antenna structure of the mobile device 100 may be less than or equal to 30mm. The total width WT of the antenna structure of the mobile device 100 may be less than or equal to 8mm. The above component size range is obtained from a plurality of experimental results, which helps to optimize the operating Bandwidth (Operation Bandwidth) and impedance matching of the antenna structure of the mobile device 100.

Fig. 7 shows a perspective view of a mobile device 700 according to another embodiment of the invention. In the embodiment of fig. 7, the mobile device 700 is a notebook computer and includes a top Cover (Upper Cover) 710, a Base (Base) 720, and a Hinge Element (Hinge Element) 730, wherein the Hinge Element 730 is connected between the top Cover 710 and the Base 720, such that the notebook computer can operate in an open mode or a closed mode. In detail, the base 720 has an edge 721, and the antenna structure can be disposed at a first position 751 or a second position 752 adjacent to the edge 721 in the base 720. If the mobile device 700 has a metal housing, the upper cover 710 and the base 720 may further have corresponding Antenna windows (Antenna windows) to facilitate transmission of Electromagnetic waves (Electromagnetic waves) of the Antenna structure. The remaining features of the mobile device 700 of fig. 7 are similar to those of the mobile device 100 of fig. 1, so that similar operations can be achieved in both embodiments.

The present invention provides a novel mobile device and antenna structure that can cover both WWAN and WLAN operating bands. By adding the common ground design, the total area of the broadband antenna structure proposed by the present invention can be greatly reduced by more than 50% compared to the prior art (the total length of the conventional integrated antenna covering WWAN and WLAN is usually at least 65mm or longer). In summary, the present invention has at least advantages of small size, wide frequency band, and low manufacturing cost, so it is very suitable for various Narrow frame (Narrow Border) mobile communication devices.

It should be 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 antenna structure of the present invention are not limited to the states shown in fig. 1-7. The present invention may include only any one or more features of any one or more of the embodiments of fig. 1-7. 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 claims are not to be given a sequential order, but are merely used to identify two different elements having the same name.

Although the present 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 common ground coupled to a ground potential;

a connecting portion;

a first radiation part having a first feed point, wherein the first radiation part is coupled to the common ground part via the connection part;

a second radiation part coupled to the first feed point, wherein the second radiation part is at least partially surrounded by the first radiation part;

a third radiation part with a second feed point;

a fourth radiating portion adjacent to the third radiating portion, wherein the fourth radiating portion is coupled to the common ground portion; and

a dielectric substrate;

wherein the common grounding part, the connecting part, the first radiation part, the second radiation part, the third radiation part and the fourth radiation part form an antenna structure together;

wherein the antenna structure is arranged on the dielectric substrate;

the first radiation part is in an inverted U shape and defines a gap area, and the second radiation part is positioned in the gap area.

2. The mobile device as claimed in claim 1, wherein the common ground portion has a straight bar shape.

3. The mobile device of claim 1, wherein the common ground has a first side and a second side opposite, the connecting portion, the first radiating portion, and the second radiating portion are disposed at the first side of the common ground, and the third radiating portion and the fourth radiating portion are disposed at the second side of the common ground.

4. The mobile device as claimed in claim 1, wherein the fourth radiating portion is separated from the third radiating portion, and a coupling gap is formed between the third radiating portion and the fourth radiating portion.

5. The mobile device of claim 1, wherein the antenna structure covers a first frequency band between 1710MHz and 2170MHz, a second frequency band between 2300MHz and 2700MHz, a third frequency band between 2400MHz and 2500MHz, and a fourth frequency band between 5150MHz and 5850 MHz.

6. The mobile device as claimed in claim 5, wherein the first frequency band is generated by the first radiating portion, and the length of the first radiating portion is substantially equal to 0.25 times the wavelength of the first frequency band.

7. The mobile device as claimed in claim 5, wherein the second frequency band is generated by the excitation of the second radiating portion, and the length of the second radiating portion is substantially equal to 0.25 times the wavelength of the second frequency band.

8. The mobile device as claimed in claim 5, wherein the third frequency band is generated by excitation of the fourth radiation portion and the common ground portion, and a total length of the fourth radiation portion and the common ground portion is substantially equal to 0.25 times a wavelength of the third frequency band.

9. The mobile device as claimed in claim 5, wherein the fourth frequency band is generated by the excitation of the third radiation portion, and the length of the third radiation portion is substantially equal to 0.25 times the wavelength of the fourth frequency band.