CN106469845B - Antenna device and electronic device using the same - Google Patents

Abstract

The present invention discloses an antenna device and an electronic device using the antenna device. The low peak gain antenna device applied to the electronic device comprises: a first feeding branch arranged on a first side of a first plane; a first grounding branch arranged on a second side of the first plane; a second grounding branch arranged on a first side of a second plane; the first sides of the first and second planes are adjacent to each other; a second feeding branch arranged on a second side of the second plane; the second sides of the first and second planes are adjacent to each other; a first connecting portion electrically connecting the first and second feeding branches; a second connecting portion electrically connecting the first and second grounding branches; the first and second connecting portions do not contact each other; a third connecting portion electrically connecting the second feeding branch and the second grounding branch; a feeding point; and a grounding point.

Description

Antenna device and electronic device using the antenna device

technical field

The invention relates to an antenna device, in particular to an antenna device in an electronic device.

Background technique

With the vigorous development of wireless communication, wireless devices have been widely used in various products. The initial applications are mobile communication products (ex.Mobile phone and NB, etc.) or network communication products (ex.AP and Hotspot, etc.), and recently Over the past few years, it has been extended to household appliances or personal belongings, such as Smart TV, Smart Watch, projector and so on. Antennas are devices that are commonly used in various products. However, different products have different requirements for antenna design. For example, customers of notebook computers, Netcom or home appliances require not only that the antenna radiation efficiency meet specific specifications, There is also a maximum limit for the peak gain of the radiation pattern. When the antenna device is applied to an electronic device, its antenna radiation is usually affected by the metal parts of the electronic device to have a greater directivity, and the peak gain is the product of the directivity and the radiation efficiency. The peak gain is a specification regulated by relevant regulations, so it is necessary to design an antenna device with low peak gain applied to electronic devices.

Contents of the invention

In order to solve the above problems, according to an embodiment of the present invention, a low peak gain antenna device applied to electronic devices is provided, the antenna device includes: a first feed branch, disposed on a first side of a first plane ; a first grounding branch, disposed on the second side of the first plane; a second grounding branch, disposed on the first side of a second plane; the first side of the second plane and the first side of the first plane One side is adjacent; a second feed-in branch is arranged on the second side of the second plane; the second side of the second plane is adjacent to the second side of the first plane; a first connecting part is electrically connecting the first and the second feed-in branch; a second connecting portion electrically connecting the first and the second grounding branch; the first and the second connecting portion are overlapped without contacting each other; a first Three connecting parts, electrically connecting the second feeding branch and the second grounding branch; a signal feeding point, connecting the second feeding branch or the first connecting part; and a grounding point, connecting the first grounding branch or the second connection.

In the present invention, the first and second feeding branches and the first and second grounding branches of the antenna device have at least two line segments, including a first line segment and a second line segment. However, the first plane and the second plane of the antenna device may be co-planar or not.

According to an embodiment of the present invention, the present invention further provides an electronic device, which includes the above-mentioned antenna device, a radio frequency signal processing module, and a metal element, and the metal element is generally used as a system ground plane. And by adjusting the angle between the first plane and the second plane of the antenna device and the position of the antenna device in the electronic device, the influence of the metal element on the radiation pattern of the antenna device can be changed, and the antenna device can be reduced. The peak gain of the device, wherein the first plane and the second plane of the antenna device are not necessarily parallel to any metal surface of the metal element.

According to an embodiment of the present invention, in the 2.4GHz frequency band of Wi-Fi applications and when set in the same electronic device environment, the peak gain of the antenna device of the present invention is higher than that of the coupled (coupled) type and PIFA type antenna devices of the prior art Still young. Therefore, when the antenna device of the present invention and the coupled (coupled) type, PIFA type antenna device are arranged in the same electronic device environment, the antenna device of the present invention can have lower directivity performance than the coupled (coupled) type, PIFA type antenna device .

Description of drawings

FIG. 1A is a schematic diagram of an antenna device 100 according to an embodiment of the present invention;

FIG. 1B is a schematic diagram of two planes of an antenna device 100 according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an antenna device 200 according to an embodiment of the present invention;

FIG. 3A is a schematic diagram of an electronic device 300 according to an embodiment of the present invention;

3B is a schematic diagram of an antenna device and a metal element according to an embodiment of the present invention;

FIG. 4A is a schematic diagram of a peak gain simulation result according to an embodiment of the present invention;

4B is a schematic diagram of a peak gain simulation result of a coupled (coupled) antenna device;

FIG. 4C is a schematic diagram of a peak gain simulation result of a PIFA-type antenna device.

Symbol Description

100, 200, 307～antenna device

101, 216, 308 to the first plane

102, 217, 309 to the second plane

103～central line

105, 201～the first feeding branch

106, 202 ~ the first grounding branch

107, 203 ~ the second grounding branch

108, 204 ~ the second feed branch

109, 205 ~ the first connecting part

110, 206 ~ the second connecting part

111, 207~the third connecting part

112, 208～signal feed-in point

113, 209～grounding point

114 - the first side of the first plane

115 ~ the second side of the first plane

116 ~ the first side of the second plane

117～a second side of the second plane

118, 218, 310 ~ included angle

2111～The first line segment of the first feed branch

2112～The second line segment of the first feed branch

2113～The third line segment of the first feed branch

2121～The first line segment of the first grounding branch

2122～The second line segment of the first grounding branch

2123～The third line segment of the first grounding branch

2131～The first line segment of the second grounding branch

2132～The second line segment of the second ground branch

2133～The third line segment of the second grounding branch

2141～The first line segment of the second feed branch

2142～The second line segment of the second feed branch

2143～The third line segment of the second feed branch

L～Electrical path

300～Electronic device

301～RF signal processing module

302～Metal components

303～vertical distance

304～horizontal distance

305～first metal surface

306～Second metal surface

Detailed ways

In order to make the above-mentioned purpose, features and advantages of the present invention more comprehensible, specific embodiments of the present invention are specifically cited below, together with the accompanying drawings, to be described in detail as follows.

1A-1B are schematic diagrams showing the structure of an antenna device 100 according to a first embodiment of the present invention. The antenna device 100 includes a first feed branch 105, a first ground branch 106, a second ground branch 107, a second feed branch 108, a first connection part 109, a second connection part 110, a first Three connection parts 111 , a signal feed point 112 and a ground point 113 . The first feed branch 105 and the first ground branch 106 are arranged on a first plane 101, and the second ground branch 107 and the second feed branch 108 are arranged on a second plane 102, wherein the first feed branch 105 is arranged On the first side 114 of a first plane; the first grounding branch 106 is arranged on the second side 115 of a first plane; the second grounding branch 107 is arranged on the first side 116 of a second plane; the second feeding branch 108 is arranged on the second side 117 of a second plane; the first side 114 of the first plane is adjacent to the first side 116 of the second plane, and the second side 115 of the first plane is adjacent to the second side 115 of the second plane. Sides 117 are adjacent. The first feed branch 105 is electrically connected to the second feed branch 108 through the first connection part 109, and the first ground branch 106 is electrically connected to the second ground branch 107 through the second connection part 110. In addition, the second ground branch 107 passes through The third connecting portion 111 is electrically connected to the second feeding branch 108 . Wherein the first connecting portion 109 is designed as an air bridge device, thereby crossing over the second connecting portion 110 to achieve the purpose of not contacting each other. In some embodiments, the second connecting portion 110 is designed as an air bridge device to straddle the first connecting portion 109 without contacting each other. The signal feeding point 112 is located at the second feeding branch 108 and is close to the central line 103 , and the grounding point 113 is located at the first grounding branch 106 and is close to the central line 103 . In some embodiments, the signal feed point 112 is connected to the second feed branch 108 or the first connection part 109 , and the ground point 113 is connected to the first ground branch 106 or the second connection part 110 . In some embodiments, the signal feeding point 112 is connected to a position of the first connecting portion 109 close to the second feeding branch 108 . In some embodiments, the ground point 113 is connected to a position of the second connecting portion 110 close to the first ground branch 106 .

In some embodiments, the first feed branch 105 , the first ground branch 106 , the second ground branch 107 and the second feed branch 108 may have at least two wire segments. In another embodiment, the length of the electrical path of the third connecting portion 111 is a quarter of the wavelength corresponding to the operating frequency of the antenna device 100 , where the electrical path is the current path.

FIG. 1B is a schematic diagram showing a first plane 101 and a second plane 102 of the antenna device 100 according to an embodiment of the present invention. The first plane 101 and the second plane 102 have an included angle 118 . The included angle 118 can be any angle except 0 degrees. In some embodiments, the angle 118 of the antenna device 100 and the position of the antenna device 100 in the electronic device can be adjusted to match the metal elements in the electronic device, such as the metal ground plane, so as to achieve the effect of low peak gain.

FIG. 2 is a schematic diagram showing the structure of an antenna device 200 according to an embodiment of the present invention. The antenna device 200 includes a first feed branch 201, a first ground branch 202, a second ground branch 203, a second feed branch 204, a first connection part 205, a second connection part 206, a first Three connection parts 207 , a signal feed point 208 and a ground point 209 . The first feed branch 201 and the first ground branch 202 are arranged on the first plane 216, and the second ground branch 203 and the second feed branch 204 are arranged on the second plane 217, wherein the first plane 216 and the second plane 217 The included angle 218 is a right angle of 90 degrees. The signal feed point 208 is located at the second feed branch 204 , and the ground point 209 is located at the second connection portion 206 . The first feed branch 201 is electrically connected to the second feed branch 204 through the first connection part 205, and the first ground branch 202 is electrically connected to the second ground branch 203 through the second connection part 206. In addition, the second ground branch 203 passes through The third connecting portion 207 is electrically connected to the second feeding branch 204 . Wherein the first connecting portion 205 is designed as an air bridge device, thereby crossing over the second connecting portion 206 to achieve the purpose of not contacting each other. In this embodiment, the first feeding branch 201 , the first grounding branch 202 , the second grounding branch 203 , and the second feeding branch 204 all have three line segments. Wherein, the area of each line segment is adjusted to design the characteristic impedance, and then the area of each line segment is adjusted to achieve impedance matching. In this embodiment, by designing the electrical path lengths of the first feed branch 201 and the second feed branch 204 relative to the signal feed point 208 and the electrical path lengths of the first ground branch 202 and the second ground branch 203 relative to the ground point 209 The antenna device 200 is operable for Wi-Fi 2.4GHz (first operating frequency) applications. In addition, the electrical path lengths of the first feed branch 201 and the second feed branch 204 relative to the signal feed point 208 in this embodiment are the same as the electrical path lengths of the first ground branch 202 and the second ground branch 203 relative to the ground point 209. The path lengths are all the same first electrical path length. In this embodiment, the electrical path lengths of the first line segment 2111 of the first feeding branch, the first line segment 2141 of the second feeding branch relative to the signal feeding point 208 and the first line segment of the first grounding branch are designed. 2121. The electrical path length of the first line segment 2131 of the second ground branch relative to the ground point 209 enables the antenna device 200 to operate at the Wi-Fi 5GHz (second operating frequency) application at the same time, and the first feed branch of the first feed branch One line segment 2111, the first line segment 2141 of the second feed branch are relative to the electrical path length of the signal feed point 208, and the first line segment 2121 of the first ground branch is opposite to the first line segment 2131 of the second ground branch. The electrical path lengths at the ground point 209 are all the same second electrical path length. In addition, the electrical path length of the electrical path L of the third connecting portion 207 in this embodiment is a quarter of the wavelength corresponding to the first operating frequency of the antenna device 200 .

FIG. 3A is a schematic diagram showing an electronic device 300 according to an embodiment of the invention. The electronic device 300 can be a TV, a monitor, and a tablet computer, but the present invention is not limited thereto. The electronic device 300 includes an antenna device 307 , a radio frequency signal processing module 301 and a metal element 302 , wherein the radio frequency signal processing module 301 is used to send signals to the antenna device 307 or receive signals from the antenna device 307 . In some embodiments, metal element 302 acts as a system ground plane. As shown in Figure 3B, the first plane 308 of the antenna device 307 is parallel to the first metal plane 305 of the metal element 302 and has a vertical distance 303, the second plane 309 of the antenna device 307 is parallel to the second metal plane 306 of the metal element 302 parallel and have a horizontal distance 304 .

In some embodiments, the first plane 308 and the second plane 309 of the antenna device 307 have an angle 310, and by adjusting the angle 310 of the antenna device 307 and the position of the antenna device 307 in the electronic device, the metal element can be changed 302 on the radiation pattern of the antenna device 307, and reduce the peak gain of the antenna device 307, in one embodiment, the angle 310 of the antenna device 307 is a right angle of 90 degrees, and the vertical distance 303 is 10mm, and the horizontal distance 304 is 6mm. In some embodiments, the first plane 308 and the second plane 309 are not necessarily parallel to any metal surface of the metal element.

As shown in Figures 4A to 4C, according to an embodiment of the present invention, in the 2.4GHz frequency band for Wi-Fi applications and when set in the same electronic device environment, the peak gain of the antenna device of the present invention (Figure 4A) is higher than that of The peak gain of the coupled type (FIG. 4B) and PIFA type antenna devices (FIG. 4C) of the prior art is still small. Therefore, when the antenna device of the present invention and the coupled (coupled) type, PIFA type antenna device are installed in the same electronic device environment, the antenna device of the present invention can have a lower peak value than the coupled (coupled) type, PIFA type antenna device. gain.

In some embodiments, the arrangement of the antenna devices in the above embodiments on the first plane and the second plane can be configured in up and down directions or left and right directions, or mirror configurations in up and down directions and left and right directions.

Although the present invention has been disclosed in conjunction with the above preferred embodiments, it is not intended to limit the scope of the present invention. Any skilled person can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore The scope of protection of the present invention should be defined by the appended claims.

Claims (10)

1. a kind of antenna assembly, including：

First feed-in branch is set to the first side of one first plane；

First ground connection branch, is set to second side of first plane；

Second ground connection branch, is set to the first side of one second plane；The of first side of second plane and first plane Side is adjacent；

Second feed-in branch, is set to second side of second plane；The of second side of second plane and first plane Two sides are adjacent；

First connecting portion, be electrically connected this first and the second feed-in branch；

Second connecting portion, be electrically connected this first and this second ground connection branch；This first and the second connecting portion be not in contact with each other each other Overlapping setting；

Third interconnecting piece is electrically connected the second feed-in branch and the second ground connection branch；

Signal feed-in point connects the second feed-in branch or the first connecting portion；And

Grounding point connects the first ground connection branch or the second connecting portion；

Wherein, first plane and second plane have an angle, which can be the unspecified angle being outside one's consideration except 0.

2. antenna assembly as described in claim 1, wherein the first, second feed-in branch, the first, second ground connection branch have There are at least two line segments, including the first line segment and second line segment.

3. antenna assembly as described in claim 1, wherein first plane and second plane are coplanar.

4. antenna assembly as described in claim 1, wherein first plane and second plane are Different Plane.

5. antenna assembly as claimed in claim 2, wherein by adjusting the first, second feed-in branch relative to the signal The electrical path length of load point and this first, second ground connection branch relative to the grounding point electrical path length to determine this First operating frequency of antenna assembly.

6. antenna assembly as claimed in claim 2, wherein by adjusting the first, second feed-in branch, this first, second Each line segment area of branch is grounded to determine the characteristic impedance of the antenna assembly.

7. antenna assembly as claimed in claim 5, the wherein electricity of the first, second feed-in branch relative to the signal feed-in point Gas circuit electrical path length and the first, second ground connection branch relative to the electrical path length of the grounding point are identical one first Electrical path length.

8. antenna assembly as claimed in claim 5, wherein multiple first line segment of the first, second feed-in branch relative to The electrical path length of the signal feed-in point and multiple first line segment of the first, second ground connection branch are relative to the ground connection Point electrical path length be identical one second electrical path length, and second electrical path length determine this day it is traditional thread binding The second operating frequency set.

9. antenna assembly as claimed in claim 7, wherein the electrical path length of the third interconnecting piece is the first operation frequency The a quarter of wavelength corresponding to rate.

10. a kind of electronic device, including：

Antenna assembly as described in one of claim 1 to 9；

Radio-frequency signal processing module sending a signal to the antenna assembly, or receives the signal of the antenna assembly；And

Hardware, as system ground.