CN113258262A - Electronic device - Google Patents

Abstract

An electronic device, comprising: a first metal part, a second metal part, a feed-in radiation part, a first radiation part, a second radiation part, a third radiation part, and a matching radiation part. The first metal portion is coupled to a ground potential. The second metal part is separated from the first metal part. An anode of a signal source is coupled to the feed radiation part, and a cathode of the signal source is coupled to the first metal part. The first radiation part and the second radiation part are both coupled to the feed radiation part. The third radiation part is coupled to the second metal part and is adjacent to the first radiation part and the second radiation part. The feed radiation part, the first radiation part, the second radiation part, the third radiation part and the matching radiation part form an antenna structure together. The second metal part and the third radiation part together form a sensing plate.

Description

Electronic device

Technical Field

The present invention relates to an electronic device, and more particularly, to an electronic device capable of integrating an Antenna Structure (Antenna Structure) and a Sensing board (Sensing Pad).

Background

With the development of mobile communication technology, mobile devices have become increasingly popular in recent years, such as: portable computers, mobile phones, multimedia players and other portable electronic devices with mixed functions. To meet the demand of people, mobile devices generally have a function of wireless communication. Some cover long-range wireless communication ranges, such as: the mobile phone uses 2G, 3G, LTE (Long Term Evolution) system and its used frequency bands of 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz and 2500MHz for communication, while some cover short-distance wireless communication ranges, for example: Wi-Fi and Bluetooth systems use frequency bands of 2.4GHz, 5.2GHz, and 5.8GHz for communication.

An antenna is an essential component of a mobile device having a wireless communication function. In order to meet the Specific Absorption Rate (SAR) specification, designers typically incorporate a Proximity Sensor (P-Sensor) in the mobile device to control the rf power associated with the antenna. However, the sensing plate of the proximity sensor is liable to cause interference with the antenna and reduce the radiation efficiency of the antenna. Therefore, there is a need to provide a new solution to overcome the problems of the prior art.

Disclosure of Invention

In a preferred embodiment, the present invention provides an electronic device comprising: a first metal portion coupled to a ground potential; a second metal part separated from the first metal part; a feed-in radiation part, wherein a positive pole of a signal source is coupled to the feed-in radiation part, and a negative pole of the signal source is coupled to the first metal part; a first radiation part coupled to the feed radiation part; a second radiation part coupled to the feed radiation part, wherein the second radiation part extends in a direction substantially opposite to the first radiation part; a third radiation part coupled to the second metal part and adjacent to the first and second radiation parts; and a matching radiation part coupled to the feed radiation part; wherein the feed radiation part, the first radiation part, the second radiation part, the third radiation part and the matching radiation part form an antenna structure together; wherein the second metal part and the third radiation part together form a sensing plate.

In some embodiments, the electronic device further comprises: a system ground plane for providing the ground potential; a conductive adhesive layer for attaching the first metal part to the system ground plane; an insulating adhesive layer for attaching the second metal part to the system ground plane; and a dielectric substrate, wherein the feed radiation part, the first radiation part, the second radiation part, the third radiation part and the matching radiation part are all arranged on the same surface of the dielectric substrate.

In some embodiments, a combination of the feeding radiating portion, the first radiating portion, and the second radiating portion is in a T-shape.

In some embodiments, the third radiating portion is in a U-shape.

In some embodiments, the second metal portion is L-shaped and has a hollow area.

In some embodiments, the antenna structure covers a first frequency band between 704MHz and 960MHz, a second frequency band between 1710MHz and 2170MHz, and a third frequency band between 2300MHz and 2700 MHz.

In some embodiments, the third radiating portion includes a connecting portion, a first extending portion, and a second extending portion, the connecting portion is coupled between the first extending portion and the second extending portion, the first extending portion is adjacent to the first radiating portion and the second radiating portion, and the connecting portion and the second extending portion are both coupled to the second metal portion.

In some embodiments, a total length of the connection portion and the first extension portion of the third radiating portion is substantially equal to 0.25 times a wavelength of the first frequency band.

In some embodiments, a total length of the feed radiating portion and the first radiating portion is substantially equal to 0.25 times a wavelength of the second frequency band.

In some embodiments, a total length of the feed radiating portion and the second radiating portion is substantially equal to 0.25 times a wavelength of the third frequency band.

Drawings

Fig. 1 is a top view of an electronic device according to an embodiment of the invention.

Fig. 2 is a partial cross-sectional view illustrating an electronic device according to an embodiment of the invention.

Fig. 3 is a partial cross-sectional view illustrating an electronic device according to an embodiment of the invention.

Fig. 4 is a graph illustrating the radiation efficiency of an antenna structure of an electronic device according to an embodiment of the invention.

Fig. 5 is a top view of an electronic device according to another embodiment of the invention.

Fig. 6 is a schematic diagram illustrating a reversible mobile device according to an embodiment of the invention when operating in a notebook mode.

Fig. 7 is a schematic diagram illustrating a reversible mobile device according to an embodiment of the present invention when operating in tablet mode.

Wherein the reference numerals are as follows:

100. 500-an electronic device;

110 to a first metal portion;

120 to a second metal portion;

125-a hollowed-out portion of the second metal portion;

130-feed radiation part;

131-a first end of the feed-in radiation part;

132-a second end of the feed-in radiating part;

140 to a first radiation section;

141 to a first end of the first radiating section;

142 to the second end of the first radiating section;

150 to a second radiation section;

151 to a first end of the second radiating section;

152 to a second end of the second radiating section;

160 to a third radiation section;

164 to a third radiation portion;

165 to a first extension part of the third radiation part;

166 to a second extension portion of the third radiating portion;

170-matching the radiation part;

171-a first end of the matching radiating section;

172-a second end of the matching radiating section;

180. 580 to the system ground plane;

191-a conductive adhesive layer;

192-insulating glue layer;

199-signal source;

595 a dielectric substrate;

598-proximity sensor;

600-turnover mobile device;

611 to cover the outer casing;

612-a display frame;

613-keyboard frame;

614-base shell;

615-a rotating shaft element;

CC1 — first curve;

CC 2-second curve;

e1-surface;

FB1 — first frequency band;

FB 2-second band;

FB3 to third frequency band;

GC 1-coupling gap;

GS 1-separation gap;

l1, L2, L3, L4-length;

w1, W2, W3-width;

VSS to ground potential.

Detailed Description

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

Certain terms are used throughout the description and following claims to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The present specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The term "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to achieve the basic technical result. In addition, the term "coupled" is used herein to encompass any direct or indirect electrical connection. Thus, if a first device couples to a second device, that connection may be through a direct electrical connection, or through an indirect electrical connection via other devices and connections.

Fig. 1 is a top view illustrating an electronic device 100 according to an embodiment of the invention. For example, the electronic device 100 can be applied to a smart phone, a tablet computer, or a notebook computer. As shown in fig. 1, the electronic device 100 at least includes: a first metal part 110, a second metal part 120, a feeding radiation part 130, a first radiation part 140, a second radiation part 150, a third radiation part 160, and a matching radiation part 170, wherein the feeding radiation part 130, the first radiation part 140, the second radiation part 150, the third radiation part 160, and the matching radiation part 170 may also be 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 electronic device 100 may also include other elements, such as: the device comprises a display, a loudspeaker, a touch module, a power supply module and a shell.

For example, the first metal part 110 and the second metal part 120 may be made of copper foil. The first metal part 110 may substantially have a rectangular shape or a square shape. The first metal portion 110 is coupled to a ground potential VSS. The second metal portion 120 may be substantially L-shaped and has a hollow area 125, wherein the hollow area 125 may be a rectangular non-metal area. The second metal part 120 is completely separated from the first metal part 110. In other words, a separation gap GS1 may be formed between the second metal part 120 and the first metal part 110, such that the second metal part 120 and the first metal part 110 are electrically isolated from each other.

Fig. 2 is a partial cross-sectional view illustrating an electronic device 100 according to an embodiment of the invention. In the embodiment of fig. 2, the electronic device 100 further includes a system ground plane 180 and a conductive adhesive layer 191, wherein the system ground plane 180 can be used for providing the ground potential VSS. The conductive adhesive layer 191 may be made of a conductive material. The conductive adhesive layer 191 may attach the first metal part 110 to the system ground plane 180, such that the first metal part 110 may be regarded as an extended ground portion of the system ground plane 180.

Fig. 3 is a partial cross-sectional view illustrating an electronic device 100 according to an embodiment of the invention. In the embodiment of fig. 3, the electronic device 100 further includes a system ground plane 180 and an insulating layer 192, wherein the system ground plane 180 can be used for providing the ground potential VSS. The insulating glue layer 192 may be made of a non-conductive material. The insulating adhesive layer 192 may attach the second metal part 120 to the system ground plane 180, such that the second metal part 120 may be regarded as a Floating and Ungrounded state. However, the present invention is not limited thereto. In other embodiments, the second metal portion 120 may be modified to be coupled to the system ground plane 180 at least partially, which does not affect the technical effect of the present invention.

The feeding radiating part 130 may be substantially in the shape of a straight bar. In detail, the feeding radiating portion 130 has a first end 131 and a second end 132, wherein a positive pole of a signal source 199 is coupled to the first end 131 of the feeding radiating portion 130, and a negative pole of the signal source 199 is coupled to the first metal portion 110. In some embodiments, the signal source 199 is a rf module, wherein the positive pole of the signal source 199 can be further coupled to the feeding radiating portion 130 through a center conductor of a coaxial cable, and the negative pole of the signal source 199 can be further coupled to the first metal portion 110 through a conductor housing of the coaxial cable.

The first radiation portion 140 may have a substantially straight strip shape, which may be substantially perpendicular to the feeding radiation portion 130. In detail, the first radiation portion 140 has a first end 141 and a second end 142, wherein the first end 141 of the first radiation portion 140 is coupled to the second end 132 of the feeding radiation portion 130, and the second end 142 of the first radiation portion 140 is an open end.

The second radiation portion 150 may have a substantially straight strip shape, which may be substantially perpendicular to the feeding radiation portion 130. In detail, the second radiation portion 150 has a first end 151 and a second end 152, wherein the first end 151 of the second radiation portion 150 is coupled to the second end 132 of the feeding radiation portion 130, and the second end 152 of the second radiation portion 150 is an open end. The second end 152 of the second radiating portion 150 and the second end 142 of the first radiating portion 140 extend in substantially opposite directions. In some embodiments, a combination of the feeding radiating portion 130, the first radiating portion 140, and the second radiating portion 150 substantially presents a T-shape.

The third radiating portion 160 may substantially exhibit a U-shape of unequal width. In detail, the third radiating portion 160 includes a connecting portion 164, a first extending portion 165, and a second extending portion 166, wherein the connecting portion 164 is coupled between the first extending portion 165 and the second extending portion 166. The first extension 165 and the second extension 166 may be substantially parallel to each other. The length of the first extension 165 may be greater than the length of the second extension 166. The width W1 of the connection portion 164 may be greater than the width W2 of the first extension portion 165 and may be greater than the width W3 of the second extension portion 166. The first extension portion 165 of the third radiation portion 160 is adjacent to the first radiation portion 140 and the second radiation portion 150, wherein a coupling gap GC1 may be formed between the first extension portion 165 and each of the first radiation portion 140 and the second radiation portion 150. The connection portion 164 and the second extension portion 166 of the third radiation portion 160 are both coupled to the second metal portion 120. In some embodiments, the feeding radiating part 130, the first radiating part 140, the second radiating part 150, and the matching radiating part 170 may be interposed between the first extending portion 165 and the second extending portion 166 of the third radiating part 160.

The matching radiating portion 170 may have a straight bar shape, which may be substantially parallel to the second radiating portion 150. In detail, the matching radiating portion 170 has a first end 171 and a second end 172, wherein the first end 171 of the matching radiating portion 170 is coupled to the first end 131 of the feeding radiating portion 130, and the second end 172 of the matching radiating portion 170 is an open end and is adjacent to the connecting portion 164 of the third radiating portion 160. The second end 172 of the matching radiating section 170 and the second end 152 of the second radiating section 150 may extend in substantially the same direction. 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., 10mm 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).

In a preferred embodiment, the feeding radiating part 130, the first radiating part 140, the second radiating part 150, the third radiating part 160, and the matching radiating part 170 together form an antenna structure. In addition, the second metal part 120 and the third radiation part 160 together form a sensing plate. Therefore, the electronic device 100 can have both proximity sensing and signal transmission functions, which can be regarded as a hybrid antenna (hybrid antenna). Since the antenna structure is well integrated with the sensing plate, the overall size of the electronic device 100 can be greatly reduced.

Fig. 4 is a graph showing the radiation efficiency of the antenna structure of the electronic 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). As shown in fig. 4, a first curve CC1 represents the operating characteristics of the electronic device 100 when the antenna structure is not integrated with the sensing plate, and a second curve CC2 represents the operating characteristics of the electronic device 100 when the antenna structure is integrated with the sensing plate. According to the measurement results of fig. 4, the addition of the sensing plate does not have a too large negative impact on the radiation performance of the antenna structure. In addition, the antenna structure of the electronic device 100 may cover a first frequency band FB1, a second frequency band FB2, and a third frequency band FB3, wherein the first frequency band FB1 may be between 704MHz and 960MHz, the second frequency band FB2 may be between 1710MHz and 2170MHz, and the third frequency band FB3 may be between 2300MHz and 2700 MHz. Therefore, the antenna structure of the electronic device 100 can support at least the wideband operation of lte (long Term evolution).

In some embodiments, the operating principles of the electronic device 100 may be as follows. The connecting portion 164 and the first extending portion 165 of the third radiating portion 160 are coupled and excited by the feeding radiating portion 130, the first radiating portion 140, and the second radiating portion 150 to generate the first frequency band FB 1. The feeding radiation part 130 and the first radiation part 140 can jointly excite to generate the aforementioned second frequency band FB 2. The feeding radiation part 130 and the second radiation part 150 can be excited together to generate the aforementioned third frequency band FB 3. The matching radiation part 170 can be used to fine tune the impedance matching of the first frequency band FB1, the second frequency band FB2, and the third frequency band FB3, so as to increase the overall operation bandwidth of the antenna structure. In addition, when a human body approaches the electronic device 100, a virtual capacitor is formed between the human body and the sensing plate formed by the second metal part 120 and the third radiation part 160. By analyzing the capacitance of the dummy capacitor, the electronic device 100 can be used to estimate the distance to the human body, thereby controlling the radio frequency power associated with the antenna structure and reducing the Specific Absorption Rate (SAR).

In some embodiments, the dimensions of the components of the electronic device 100 may be as follows. The total length L1 of the connection portion 164 and the first extension portion 165 of the third radiation part 160 may be substantially equal to 0.25 times the wavelength (λ/4) of the first frequency band FB1 of the antenna structure. The total length L2 of the feeding radiating part 130 and the first radiating part 140 may be substantially equal to 0.25 times the wavelength (λ/4) of the second frequency band FB2 of the antenna structure. The total length L3 of the feeding radiating part 130 and the second radiating part 150 may be substantially equal to 0.25 times the wavelength (λ/4) of the third frequency band FB3 of the antenna structure. In the third radiation part 160, the width W1 of the connection portion 164 may be more than 5 times the width W2 of the first extension portion 165, and may be more than 5 times the width W3 of the second extension portion 166. The length L4 of the matching radiating part 170 may be greater than the total length L2 of the feeding radiating part 130 and the first radiating part 140, or greater than the total length L3 of the feeding radiating part 130 and the second radiating part 150. The width of the coupling gap GC1 may be between 0.5mm and 2 mm. The width of the separation gap GS1 may be between 0.5mm and 10 mm. The above range of device dimensions is derived from a plurality of experimental results, which helps to optimize the operating bandwidth and impedance matching of the antenna structure of the electronic device 100, and helps to maximize the detectable distance of the sensing plate of the electronic device 100.

Fig. 5 is a top view illustrating an electronic device 500 according to another embodiment of the invention. Fig. 5 is similar to fig. 1. In the embodiment of fig. 5, the electronic device 500 further includes a system ground plane 580, a dielectric substrate 595, and a proximity sensor 598. The dielectric substrate 595 may be an FR4(FlameRetardant 4) substrate, a printed circuit board, or a flexible circuit board. The feeding radiating portion 130, the first radiating portion 140, the second radiating portion 150, the third radiating portion 160, and the matching radiating portion 170 may all be disposed on the same surface E1 of the dielectric substrate 595. The first metal part 110 and the second metal part 120 may partially extend onto the surface E1 of the dielectric substrate 595. The proximity sensor 598 may be coupled to any position on the sensing plate composed of the second metal part 120 and the third radiation part 160, such as: any one end of the second metal part 120. As described above, the first metal part 110 may be electrically connected to the system ground plane 580, and the second metal part 120 may be separated from the first metal part 110 and is not electrically connected to the system ground plane 580. It should be noted that, since the second metal part 120 has the hollow portion 125, the design can greatly reduce the unwanted capacitance effect between the second metal part 120 and the system ground plane 580, so that the detectable distance of the sensing plate can be significantly increased. According to the actual measurement results, if the second metal part 120 does not have the hollowed part 125 (i.e. it presents a complete rectangle), the detectable distance of the sensing plate of the electronic device 500 is only about 5mm, whereas if the second metal part 120 already has the hollowed part 125 (i.e. it presents an L-shape), the detectable distance of the sensing plate of the electronic device 500 can be increased to about 15mm, which is about 200% improvement.

For example, the proposed electronic device 100 (or 500) can be applied to a convertible mobile device 600, which can include a top cover shell 611, a display frame 612, a keyboard frame 613, a base shell 614, and a hinge element 615. By using the shaft element 615, the convertible mobile device 600 can be operated in a notebook mode or a tablet mode. It should be understood that the top cover shell 611, the display bezel 612, the keyboard bezel 613, and the base shell 614 are equivalent to the commonly known "part a", "part B", "part C", and "part D" in the field of notebook computers. In detail, the proposed electronic device 100 (or 500) can be disposed in an inner space between the keyboard bezel 613 and the base housing 614.

Fig. 6 is a schematic diagram illustrating a reversible mobile device 600 according to an embodiment of the invention when operating in a notebook mode. Fig. 7 is a schematic diagram illustrating the convertible mobile device 600 according to an embodiment of the invention when operating in a tablet mode. The arrows in fig. 6, 7 may represent the detection direction of the specific absorption rate. It should be noted that since the sensing plate of the electronic device 100 (or 500) is integrated with the antenna structure, which can maintain a sufficient detectable distance (e.g., 15mm or more) in either the notebook mode or tablet mode of the convertible mobile device 600, the convertible mobile device 600 including the electronic device 100 (or 500) will be more easily detected by the specific absorption rate of the regulations.

The present invention provides a novel electronic device, which can effectively integrate an antenna structure and a sensing plate. According to the actual measurement result, the invention can simultaneously improve the operation performance of the antenna structure and improve the probability of detecting through the specific absorption rate, so that the invention is very suitable for being applied to various miniaturized mobile communication devices.

It is noted that the sizes, shapes and frequency ranges of the above-mentioned components are not limitations of the present invention. The antenna designer can adjust these settings according to different needs. The electronic device of the present invention is not limited to the states illustrated in fig. 1 to 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 required to be implemented in an electronic device of the present invention.

Ordinal numbers such as "first," "second," "third," etc., in the specification and in the claims, do not have a sequential relationship with each other, but are used merely to identify two different elements having the same name.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. An electronic device, comprising:

a first metal portion coupled to a ground potential;

a second metal part separated from the first metal part;

a feed-in radiation part, wherein a positive pole of a signal source is coupled to the feed-in radiation part, and a negative pole of the signal source is coupled to the first metal part;

a first radiation part coupled to the feed radiation part;

a second radiation part coupled to the feed radiation part, wherein the second radiation part extends in a direction substantially opposite to the first radiation part;

a third radiation part coupled to the second metal part and adjacent to the first and second radiation parts; and

a matching radiation part coupled to the feed radiation part;

wherein the feed radiation part, the first radiation part, the second radiation part, the third radiation part and the matching radiation part form an antenna structure together;

wherein the second metal part and the third radiation part together form a sensing plate.

2. The electronic device of claim 1, further comprising:

a system ground plane for providing the ground potential;

a conductive adhesive layer for attaching the first metal part to the system ground plane;

an insulating adhesive layer for attaching the second metal part to the system ground plane; and

and the feed-in radiation part, the first radiation part, the second radiation part, the third radiation part and the matching radiation part are all arranged on the same surface of the dielectric substrate.

3. The electronic device of claim 1, wherein a combination of the feeding radiating portion, the first radiating portion, and the second radiating portion is in a T-shape.

4. The electronic device of claim 1, wherein the third radiating portion has a U-shape.

5. The electronic device of claim 1, wherein the second metal portion is L-shaped and has a hollow area.

6. The electronic device of claim 1, wherein the antenna structure covers a first frequency band between 704MHz and 960MHz, a second frequency band between 1710MHz and 2170MHz, and a third frequency band between 2300MHz and 2700 MHz.

7. The electronic device of claim 6, wherein the third radiating portion comprises a connecting portion, a first extending portion, and a second extending portion, the connecting portion is coupled between the first extending portion and the second extending portion, the first extending portion is adjacent to the first radiating portion and the second radiating portion, and the connecting portion and the second extending portion are both coupled to the second metal portion.

8. The electronic device of claim 7, wherein a total length of the connecting portion and the first extending portion of the third radiating portion is substantially equal to 0.25 times a wavelength of the first frequency band.

9. The electronic device of claim 6, wherein a total length of the feeding radiating portion and the first radiating portion is substantially equal to 0.25 times a wavelength of the second frequency band.

10. The electronic device of claim 6, wherein a total length of the feeding radiating portion and the second radiating portion is substantially equal to 0.25 times a wavelength of the third frequency band.

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