CN106602227A - Electronic device - Google Patents

Abstract

An electronic device is provided. The electronic device has a front side and a back side opposite to each other and includes: a back cover and an antenna structure; the back cover is arranged at the rear side; the antenna structure includes: a first radiation part, a second radiation part and a grounding part; the first radiation part is arranged at the front side; the second radiation part is arranged between the first radiation part and the back cover and is connected with the first radiation part; the grounding part is configured between the first radiation part and the back cover, wherein the second radiation part is grounded on the back cover through the grounding part. The invention can make the electronic device have the appearance of metal texture and good signal receiving and transmitting capability.

Description

electronic device

technical field

The present invention relates to an electronic device, and in particular to an electronic device with an antenna structure.

Background technique

With the rapid development of wireless communication technology, various mobile communication devices such as smart phones, tablet PCs, and notebook computers are constantly being introduced. In addition to improving the operational functions of mobile communication devices, today's manufacturers also have increasing requirements for the appearance design of mobile communication devices in order to attract consumers' attention.

For example, most of today's mobile communication devices adopt a metallic design, such as a back cover or a metal frame, to highlight the uniqueness and appearance of the product. However, the radiation characteristics of the antenna are easily affected by surrounding metal objects. For example, the back cover will cause a shielding effect on the antenna and reduce the signal receiving and transmitting capability of the antenna. Therefore, when the mobile communication device is equipped with a back cover according to the design requirements, the communication quality of the mobile communication device will often be affected. In other words, the metallic appearance design injects a sense of fashion into the mobile communication device, but it also brings greater challenges to the design of the antenna in the mobile communication device.

Therefore, it is necessary to provide an electronic device to solve the above problems.

Contents of the invention

The invention provides an electronic device, the antenna structure of which has good signal sending and receiving capability.

The electronic device of the present invention has a front side and a rear side opposite and includes a back cover and an antenna structure. The antenna structure includes a first radiating part, a second radiating part and a grounding part. The first radiation part is arranged on the front side. The second radiating portion is disposed between the first radiating portion and the back cover and connected to the first radiating portion. The grounding part is disposed between the first radiating part and the back cover, wherein the second radiating part is grounded to the back cover through the grounding part.

The present invention also provides an electronic device, the electronic device has an opposite front side and a rear side and includes: a back cover, the back cover is disposed on the rear side; and an antenna structure, the antenna structure includes: a first a radiating part, the first radiating part is arranged on the front side; a second radiating part is arranged between the first radiating part and the back cover and connected to the first radiating part; and a ground part, the grounding part is disposed between the first radiating part and the back cover, wherein the second radiating part is grounded to the back cover through the grounding part.

In an embodiment of the present invention, the above-mentioned antenna structure includes at least one connecting portion, and the connecting portion is connected between the first radiating portion and the second radiating portion.

In an embodiment of the present invention, the number of the at least one connecting portion is two, and there is a slot between the first radiating portion, the second radiating portion, and the two connecting portions, and the slot forms a slot antenna.

In an embodiment of the present invention, the aforementioned slot antenna is suitable for receiving a signal, and a length of the slot antenna is equal to 0.5 times the wavelength of the signal.

In an embodiment of the present invention, the above-mentioned first radiating part, connecting part and second radiating part constitute an inverted-F antenna.

In an embodiment of the present invention, the above-mentioned inverted-F antenna is suitable for receiving a signal, and a length of the inverted-F-shaped antenna is equal to 0.25 times the wavelength of the signal.

In an embodiment of the present invention, the extending direction of the connecting portion is perpendicular to the extending direction of the first radiating portion and the second radiating portion.

In an embodiment of the present invention, the above-mentioned first radiating portion, the second radiating portion and the back cover are sequentially arranged at intervals.

In an embodiment of the present invention, the extending direction of the above-mentioned first radiating portion, the second radiating portion and the grounding portion is parallel to the extending direction of the back cover.

In an embodiment of the present invention, the above-mentioned second radiating portion is coplanar with the grounding portion.

In an embodiment of the present invention, there is a distance between the above-mentioned second radiation portion and the ground portion.

In an embodiment of the present invention, the above-mentioned antenna structure includes a short circuit portion connected between the second radiation portion and the ground portion.

In an embodiment of the present invention, the above-mentioned electronic device includes a cable, wherein the cable has a signal line and a ground line, the signal line is connected to the second radiation portion, and the ground line is connected to the ground portion.

In an embodiment of the present invention, the above-mentioned antenna structure includes a connecting portion, and the connecting portion is connected between the ground portion and the back cover.

In an embodiment of the present invention, the extending direction of the connecting portion is perpendicular to the extending direction of the ground portion and the back cover.

In an embodiment of the present invention, the above-mentioned first radiation portion and the back cover are appearance parts of the electronic device.

In an embodiment of the present invention, the above-mentioned electronic device includes a speaker, wherein the first radiation part covers the speaker.

In an embodiment of the present invention, the above-mentioned electronic device has a display surface, wherein the display surface is located at the front side.

In an embodiment of the present invention, the material of the above-mentioned back cover includes metal.

Based on the above, in the electronic device of the present invention, the metal back cover is located at the rear side of the electronic device, and the first radiating part of the antenna structure is located at the front side of the electronic device and is far away from the metal back cover, so the signal transmitting and receiving capability of the antenna structure is relatively low. Not degraded by the shielding of the metal back cover. In addition, the second radiating portion of the antenna structure is connected to the first radiating portion and extends inside the electronic device, so that the antenna structure has a sufficient size to achieve required radiation characteristics. In addition, the second radiating part of the antenna structure is grounded to the metal back cover through the ground part, so as to reduce the influence of the metal back cover on the radiation characteristics of the antenna structure. Accordingly, when the electronic device is equipped with a metal back cover according to the design requirements or other design requirements, the metal back cover will not affect the normal operation of the antenna structure, so that the electronic device has both a metallic appearance and good signal transmission and reception capabilities. .

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

Description of drawings

FIG. 1 is a partial perspective view of an electronic device according to an embodiment of the present invention.

FIG. 2 is a partial structural perspective view of the electronic device in FIG. 1 .

FIG. 3 is a side view of the electronic device of FIG. 2 .

FIG. 4 illustrates the VSWR of the antenna structure of FIG. 3 .

FIG. 5 is a partial top view of the antenna structure in FIG. 3 .

Description of main component symbols:

100 electronics

100a front side

100b rear side

100c display surface

110 frame

120 back cover

130 antenna structure

130a Slotted

132 The first radiation department

132a end

134 Second radiation department

134a Feed point

136 Ground part

136a Ground point

137 Short circuit part

138, 139 connecting part

140 cables

142 signal line

144 Ground wire

150 speakers

D1, D2, D3 spacing

L1, L2 Length

detailed description

FIG. 1 is a partial perspective view of an electronic device according to an embodiment of the present invention. FIG. 2 is a partial structural perspective view of the electronic device in FIG. 1 . FIG. 3 is a side view of the electronic device of FIG. 2 . 1 to 3, the electronic device 100 of this embodiment is, for example, a smart phone or other types of handheld electronic devices, and has a front side 100a, a rear side 100b and a display surface 100c, and the front side 100a is opposite to On the rear side 110b, the display surface 100c is located on the front side 100a. The electronic device 100 includes an outer frame 110 and a back cover 120, the outer frame 110 is disposed on the periphery of the electronic device 100, the back cover 120 is disposed on the rear side 100b of the electronic device 100 and together with the outer frame 110 shields the internal components of the electronic device 100 . The material of the back cover 120 is, for example, metal.

The electronic device 100 further includes an antenna structure 130 . The antenna structure 130 includes a first radiating portion 132 , a second radiating portion 134 and a grounding portion 136 . The first radiation portion 132 is disposed on the front side 100 a of the electronic device 100 . The second radiating portion 134 is disposed between the first radiating portion 132 and the back cover 120 and connected to the first radiating portion 132 . The ground portion 136 is disposed between the first radiation portion 132 and the back cover 120 , and the second radiation portion 134 is grounded to the back cover 120 through the ground portion 136 . The second radiating portion 134 and the grounding portion 136 in this embodiment are, for example, disposed on the same circuit board in the electronic device 100 , or disposed on different circuit boards in the electronic device 100 , which is not limited in the present invention.

Under the above configuration, since the metal back cover 120 is located at the rear side 110b of the electronic device 100, and the first radiating part 132 of the antenna structure 130 is located at the front side 100a of the electronic device 100 and is far away from the metal back cover 120, the antenna The signal transceiving capability of the structure 130 will not be reduced due to the shielding of the metal back cover 120 . In addition, the second radiating portion 134 of the antenna structure 130 is connected to the first radiating portion 132 and extends inside the electronic device 100 , so that the antenna structure 130 has a sufficient size to achieve required radiation characteristics. In addition, the second radiation portion 134 of the antenna structure 130 is grounded to the metal back cover 120 through the ground portion 136 , so as to reduce the influence of the metal back cover 120 on the radiation characteristics of the antenna structure 130 . Accordingly, when the electronic device 100 is equipped with the metal back cover 120 according to the appearance design requirements or other design requirements, the metal back cover 120 will not affect the normal operation of the antenna structure 130, so that the electronic device 100 has both a metallic appearance and Good signal sending and receiving ability.

Please refer to FIG. 2 and FIG. 3 , in this embodiment, the antenna structure 130 further includes two connecting parts 138 . The connecting part 138 is connected between the first radiating part 132 and the second radiating part 134, and there is a slot 130a between the first radiating part 132, the second radiating part 134 and the two connecting parts 138, and the slot 130a constitutes a slot antenna (slot antenna). Wherein, a length of the slot antenna (shown as a length L1 of a diagonal line of the slot 130 a ) is equal to 0.5 times the wavelength of the signal received by the slot antenna. In addition, the first radiating portion 132 , the connecting portion 138 and the second radiating portion 134 constitute, for example, an inverted-F antenna (IFA). Wherein, a length (shown as the path length L2 passing through the end 132a of the first radiating part 132, the connecting part 138 and the feeding point 134a of the second radiating part 134) of the inverted F-shaped antenna is equal to that of the inverted F-shaped antenna. 0.25 times the wavelength of the signal received by the antenna.

FIG. 4 shows the voltage standing wave ratio (VSWR) of the antenna structure of FIG. 3 , wherein the vertical axis is the VSWR, and the horizontal axis is the frequency (Frequency). Please refer to FIG. 4 , the frequency bands indicated by M1 and M2 correspond to the low frequency modes of the inverted-F antenna, and the frequency bands indicated by M3 and M4 correspond to the high frequency modes of the slot antenna. The voltage standing wave ratios of the low-frequency mode and the high-frequency mode are both lower than 3, meeting the standards of antennas for handheld electronic devices.

2 and 3, in detail, the first radiating portion 132, the second radiating portion 134 and the back cover 120 are arranged at intervals from the front side 100a to the rear side 100b of the electronic device 100, and the second radiating portion 134 Coplanar with the grounding portion 136, the extension direction (X-axis) of the first radiation portion 132, the second radiation portion 134, and the grounding portion 136 is parallel to the extension direction (X-axis) of the back cover 120, and each connection portion 138 The extension direction (Z axis) is perpendicular to the extension direction (X axis) of the first radiation portion 132 and the second radiation portion 134 . The antenna structure 130 also includes a connecting portion 139 as shown in FIG. The extension direction (Z axis) of the portion 139 is perpendicular to the extension direction (X axis) of the ground portion 136 and the back cover 120 .

In this embodiment, the distance D1 between the first radiating portion 132 and the second radiating portion 134 is, for example, 4 mm, and the distance D2 between the second radiating portion 134 and the back cover 120 is, for example, 3 mm to avoid the distance between the metal back cover 120 The antenna structure 130 is too close to affect the normal operation of the antenna structure 130 . In addition, the distance D3 between the second radiating portion 134 and the grounding portion 136 is, for example, 1.5 mm, so that the antenna structure 130 has better impedance matching. In other embodiments, the distance D1 , the distance D2 and the distance D3 can be other suitable values, which are not limited by the present invention.

FIG. 5 is a partial top view of the antenna structure in FIG. 3 . Please refer to FIG. 5 , there is a distance between the second radiation portion 134 and the ground portion 136 in this embodiment, and the antenna structure 130 further includes a short circuit portion 137 connected between the second radiation portion 134 and the ground portion 136 . In addition, the electronic device 100 (marked in FIG. 3 ) includes a cable 140, the cable 140 has a coaxial signal line 142 and a ground line 144, the signal line 142 is connected to the feeding point 134a of the second radiation part 134, The ground wire 144 is connected to the ground point 136 a of the ground portion 136 . To make the drawing clearer, the short circuit portion 137 and the cable 140 in FIG. 5 are not shown in FIG. 2 and FIG. 3 .

In this embodiment, both the first radiation portion 132 and the back cover 120 are appearance parts of the electronic device 100 . For example, as shown in FIG. 2 , the electronic device 100 includes a speaker 150 , and the first radiation portion 132 is a cover for covering the speaker 150 . In other embodiments, the first radiating portion 132 can be other appearance or non-appearance parts of the front side 100 a of the electronic device 100 , which is not limited by the present invention.

To sum up, in the electronic device of the present invention, the metal back cover is located at the rear side of the electronic device, and the first radiation part of the antenna structure is located at the front side of the electronic device and is far away from the metal back cover, so the signal transmission and reception of the antenna structure Capability is less degraded by the shielding of the metal back cover. In addition, the second radiating portion of the antenna structure is connected to the first radiating portion and extends inside the electronic device, so that the antenna structure has a sufficient size to achieve required radiation characteristics. In addition, the second radiating part of the antenna structure is grounded to the metal back cover through the ground part, so as to reduce the influence of the metal back cover on the radiation characteristics of the antenna structure. Accordingly, when the electronic device is equipped with a metal back cover according to the design requirements or other design requirements, the metal back cover will not affect the normal operation of the antenna structure, so that the electronic device has both a metallic appearance and good signal transmission and reception capabilities. .

Although the present invention has been disclosed above with embodiments, it is not intended to limit the present invention, and any ordinary skilled in the art should be able to make some changes and modifications without departing from the spirit and scope of the present invention. modification, so the scope of protection of the present invention should be defined by the scope of the appended claims.

Claims (19)

1. An electronic device having opposite front and rear sides and comprising: a back cover disposed on the rear side; and An antenna structure, the antenna structure comprising: a first radiating part, the first radiating part is arranged on the front side; a second radiating portion, the second radiating portion is disposed between the first radiating portion and the back cover and connected to the first radiating portion; and A grounding part, the grounding part is disposed between the first radiating part and the back cover, wherein the second radiating part is grounded to the back cover through the grounding part. 2. The electronic device as claimed in claim 1, wherein the antenna structure comprises at least one connecting portion, the connecting portion is connected between the first radiating portion and the second radiating portion. 3. The electronic device according to claim 2, wherein the number of the at least one connecting portion is two, and there is a slot between the first radiating portion, the second radiating portion, and the two connecting portions, and the slot form a slot antenna. 4. The electronic device as claimed in claim 3, wherein the slot antenna is suitable for receiving a signal, and a length of the slot antenna is equal to 0.5 times the wavelength of the signal. 5. The electronic device as claimed in claim 2, wherein the first radiating part, the connecting part and the second radiating part form an inverted-F antenna. 6. The electronic device as claimed in claim 5, wherein the inverted-F antenna is suitable for receiving a signal, and a length of the inverted-F antenna is equal to 0.25 times the wavelength of the signal. 7. The electronic device as claimed in claim 2, wherein an extending direction of the connecting portion is perpendicular to extending directions of the first radiating portion and the second radiating portion. 8. The electronic device as claimed in claim 1, wherein the first radiating portion, the second radiating portion, and the back cover are sequentially arranged at intervals. 9. The electronic device as claimed in claim 1, wherein the extending direction of the first radiating portion, the second radiating portion and the grounding portion is parallel to the extending direction of the back cover. 10. The electronic device as claimed in claim 1, wherein the second radiation portion is coplanar with the ground portion. 11. The electronic device as claimed in claim 1, wherein there is a distance between the second radiating part and the grounding part. 12. The electronic device as claimed in claim 1, wherein the antenna structure comprises a short circuit portion connected between the second radiation portion and the ground portion. 13. The electronic device as claimed in claim 1, comprising a cable, wherein the cable has a signal line and a ground line, the signal line is connected to the second radiation portion, and the ground line is connected to the ground portion. 14. The electronic device as claimed in claim 1, wherein the antenna structure comprises a connection portion connected between the ground portion and the back cover. 15. The electronic device as claimed in claim 14, wherein an extending direction of the connecting portion is perpendicular to extending directions of the grounding portion and the back cover. 16. The electronic device as claimed in claim 1, wherein the first radiating portion and the back cover are appearance parts of the electronic device. 17. The electronic device as claimed in claim 1, comprising a speaker, wherein the first radiation part covers the speaker. 18. The electronic device as claimed in claim 1, having a display surface, wherein the display surface is located on the front side. 19. The electronic device as claimed in claim 1, wherein the material of the back cover comprises metal.