TWI617095B - Electronic device - Google Patents

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Publication number
TWI617095B
TWI617095B TW105135210A TW105135210A TWI617095B TW I617095 B TWI617095 B TW I617095B TW 105135210 A TW105135210 A TW 105135210A TW 105135210 A TW105135210 A TW 105135210A TW I617095 B TWI617095 B TW I617095B
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TW
Taiwan
Prior art keywords
radiating element
end
segment
electronic device
monopole antenna
Prior art date
Application number
TW105135210A
Other languages
Chinese (zh)
Other versions
TW201818610A (en
Inventor
顏銘慶
張琨盛
黃士庭
林敬基
Original Assignee
宏碁股份有限公司
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Filing date
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Priority to TW105135210A priority Critical patent/TWI617095B/en
Application granted granted Critical
Publication of TWI617095B publication Critical patent/TWI617095B/en
Publication of TW201818610A publication Critical patent/TW201818610A/en

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Abstract

An electronic device includes a ground plane, a first radiating element and a second radiating element. The edge of the ground plane and the open slot of the first radiating element extend in a predetermined direction. The first end of the first radiating element has a feed point, and the first end of the second radiating element is electrically connected to the first radiating element. The second ends of the first and second radiating elements are respectively an open end. The first and second radiating elements form a monopole antenna operating in the first frequency band and the second frequency band. The length of the first resonant path in the monopole antenna is 1/2 wavelength of the lowest frequency of the first frequency band, and the length of the second resonant path in the monopole antenna is 1/2 wavelength of the lowest frequency of the second frequency band.

Description

Electronic device

The present invention relates to an electronic device, and more particularly to an electronic device including a monopole antenna.

In recent years, electronic devices with metal textures (for example, tablet computers, notebook computers) have been favored by consumers. For example, a housing having a metallic texture is a very popular design in recent years, and an antenna window is often provided on the frame of the housing in response to the arrangement of the antenna elements in the electronic device. In addition, the existing electronic device has introduced a narrow frame body design to highlight the uniqueness and design of the product. However, after the design of the narrow bezel is added, the space available in the electronic device to set the antenna element/antenna window is less and less. In particular, under the design of the narrow bezel, the height of the antenna element/antenna window in the Y-axis direction is greatly limited, and the antenna element is often affected by the metal environment and cannot meet the application requirements of the electronic device.

The present invention provides an electronic device in which the monopole antenna has a low profile characteristic and can reduce the influence of the surrounding metal environment.

The electronic device of the present invention includes a ground plane, a first radiating element and a second radiating element. The ground plane includes an edge that extends along a predetermined direction. The first radiating element is adjacent to an edge of the ground plane and includes an open slot extending along a predetermined direction. The first end of the first radiating element has a feeding point, the second end of the first radiating element is a first open end, and the first end and the second end of the first radiating element are located on opposite sides of the opening of the open slot. The first end of the second radiating element is electrically connected to the first radiating element, and the second end of the second radiating element is a second open end. The first radiating element and the second radiating element form a monopole antenna operating in the first frequency band and the second frequency band. The monopole antenna includes a first resonant path extending from the feed point to the first open end and a second resonant path extending from the feed point to the second open end. The length of the first resonant path is 1/2 wavelength of the lowest frequency of the first frequency band, and the length of the second resonant path is 1/2 wavelength of the lowest frequency of the second frequency band.

In an embodiment of the invention, the first radiating element comprises a first section, a second section and a third section. Wherein the first end of the first section has a feed point. The first end of the second section forms a first open end. The first end of the third section is electrically connected to the second end of the first section, and the second end of the third section is electrically connected to the second end of the second section. The first section and the second section respectively extend along a predetermined direction, and the length of the first section and the length of the second section are respectively more than twice the width of the third section.

Based on the above, the first radiating element and the second radiating element in the electronic device of the present invention may form a monopole antenna, and the open slots in the first radiating element and the edges of the ground plane extend in a predetermined direction. Thereby, it will help to reduce the height of the monopole antenna. In addition, the monopole antenna can withstand the effects of the surrounding metal environment, so that it can meet the application requirements of the electronic device in the design of the narrow bezel.

The above described features and advantages of the invention will be apparent from the following description.

1 is a schematic diagram of an electronic device in accordance with an embodiment of the present invention. As shown in FIG. 1, the electronic device 100 includes a ground plane 110, a first radiating element 120, and a second radiating element 130. Wherein, the ground plane 110 includes an edge 111, and the edge 111 extends along a preset direction (for example, an X-axis direction). The first radiating element 120 is adjacent to the edge 111 of the ground plane 110 and the first radiating element 120 includes an open slot 101.

Further, the first end of the first radiating element 120 has a feed point FP1, and the second end of the first radiating element 120 is a first open end. In addition, the first end and the second end of the first radiating element 120 are located on opposite sides of the opening of the open slot 101. Since the open slot 101 in the first radiating element 120 extends in a predetermined direction (eg, the X-axis direction), it will help to lengthen the first radiating element 120 in a predetermined direction (eg, the first radiation) The length of the element 120 is D11), thereby helping to reduce the size of the first radiating element 120 in a direction perpendicular to the predetermined direction (eg, the width D12 of the first radiating element 120). In an embodiment, the aspect ratio of the first radiating element 120, that is, the ratio of the length D11 to the width D12, is not less than 4.

The first end of the second radiating element 130 is electrically connected to the first radiating element 120, and the second end of the second radiating element 130 is a second open end. In addition, the first radiating element 120 and the second radiating element 130 may form a monopole antenna 140, and the monopole antenna 140 may operate in the first frequency band and the second frequency band. For example, monopole antenna 140 includes a first resonant path 151 and a second resonant path 152. The first resonant path 151 extends from the feeding point FP1 to the first open end, and the monopole antenna 140 can operate in the first frequency band through the first resonant path 151. The second resonant path 152 extends from the feed point FP1 to the second open end, and the monopole antenna 140 can operate in the second frequency band through the second resonant path 152.

It is worth mentioning that the general monopole antenna uses a 1/4 wavelength resonance mechanism. However, the monopole antenna 140 in the embodiment of FIG. 1 does not employ a 1/4 wavelength resonant mechanism to thereby resist or reduce the effects of the surrounding metal environment. Specifically, the length of the first resonant path 151 is 1/2 wavelength of the lowest frequency of the first frequency band, and the length of the second resonant path 152 is 1/2 wavelength of the lowest frequency of the second frequency band.

Thereby, the capacitive effect induced by the metal environment, for example, the capacitive effect between the ground plane 110 and the first radiating element 120, and the capacitive effect between the ground plane 110 and the second radiating element 130, to the monopole antenna 140 The resulting effect will be reduced by the equivalent inductance formed by the first radiating element 120 and the second radiating element 130, thereby contributing to the improvement of the radiation efficiency of the monopole antenna 140. Further, as the opening groove 101 extends in a predetermined direction (for example, the X-axis direction), the width D12 of the first radiating element 120 can be lowered, thereby contributing to reducing the height of the monopole antenna 140 in the Y-axis direction. D13 (ie, the height of the antenna window). In other words, the monopole antenna 140 has a low-profile characteristic and is resistant to the effects of the surrounding metal environment. Therefore, the monopole antenna 140 will conform to the application requirements of the electronic device 100 under the design of a narrow bezel.

For example, FIG. 2 is a schematic diagram of the appearance of an electronic device according to an embodiment of the invention. As shown in FIG. 2 , the electronic device 100 can be, for example, a notebook computer, and the electronic device 100 further includes a first body 210 , a second body 220 , and a pivot 230 . The pivot 230 is connected between the first body 210 and the second body 220, and the first body 210 and the second body 220 are relatively rotatable by a pivot. Furthermore, FIG. 2 further indicates the position of the monopole antenna 140 in the first body 210.

Specifically, the outer surface of the first body 210 may be formed by a back cover, and the inner surface of the first body 210 may be formed by a frame 240. The frame 240 includes a conductive frame 241 and an insulating case 242. The conductive frame 241 surrounds the display 250 disposed on the first body 210 , and the conductive frame 241 is electrically connected to the ground plane 110 . The insulating housing 242 may be elongated, and the insulating housing 242 is connected to a sidewall of the conductive frame 241. Further, the monopole antenna 140 is disposed within the first body 210 and faces the insulating housing 242.

In other words, in an overall configuration, the first radiating element 120 and the second radiating element 130 respectively face the insulating housing 242. That is, the orthographic projection of the first radiating element 120 and the second radiating element 130 on the outer surface of the first body 210 overlaps with the orthographic projection of the insulating housing 242 on the outer surface of the first body 210. Thereby, the insulative housing 242 will be available to form the antenna window of the monopole antenna 140. Moreover, in one embodiment, the width of the insulative housing 242, that is, the height D13 of the monopole antenna 140/antenna window, may be between 2.5 mm and 4 mm.

For example, the first frequency band covered by the monopole antenna 140 may be, for example, 2.4 GHz, the second frequency band covered by the monopole antenna 140 may be, for example, 5 GHz, and the height D13 of the monopole antenna 140/antenna window may be, for example, 3 Millimeter. Further, the spacing D21 between the insulative housing 242 and the display 250 may be, for example, 2 mm to thereby form a land of the monopole antenna 140. Wherein, the traces (eg, coaxial cables) required by the monopole antenna 140 to electrically connect to the back end circuitry (eg, the transceiver) will be configurable in the pads. Furthermore, the feed point FP1 of the monopole antenna 140 is located on one side (eg, the right side) of the overall antenna structure. Thereby, the connection of the monopole antenna 140 to the back end circuit will be facilitated, thereby contributing to simplifying the complexity of the monopole antenna 140 in the assembly.

Please continue to refer to Figure 1. The first radiating element 120 includes a first section 121, a second section 122, and a third section 123. The first end of the first section 121 has a feed point FP1, and the first section 121 can form a first side wall of the open slot 101. The first end of the second section 122 is used to form a first open end, and the second section 122 is formed to form a second side wall of the open slot 101. The first end of the third section 123 is electrically connected to the second end of the first section 121 , and the second end of the third section 123 is electrically connected to the second end of the second section 122 . Further, the third section 123 may form the bottom of the open groove 101.

The first end of the second radiating element 130 is electrically connected to the second end of the third section 123, and the third section 123 is located between the second radiating element 130 and the second section 122. That is, the second radiating element 130, the third section 123, and the second section 122 are sequentially arranged along a predetermined direction (for example, the X-axis direction). Moreover, in an embodiment, the first section 121, the second section 122 and the second radiating element 130 are parallel to the edge 111 of the ground plane 110, and the third section 123 is perpendicular to the edge 111 of the ground plane 110.

In the overall architecture, the first to third sections 121-123 may form a first resonant path 151, and the first section 121, the third section 123, and the second radiating element 130 may form a second resonant path 152. In addition, the monopole antenna 140 can receive the feed signal from the transceiver in the electronic device 100 through the feed point FP1. Thereby, under the excitation of the feed signal, the monopole antenna 140 will be operable in the first frequency band through the first resonance path 151 and in the second frequency band through the second resonance path 152.

It is worth mentioning that the first section 121 and the second section 122 respectively extend along a preset direction (for example, the X-axis direction), so that the length of the first section 121 and the second section 122 can be extended. length. Further, the length of the first resonant path 151 is approximately the sum of the length of the first section 121, the length of the second section 122, and the width of the third section 123. Therefore, in the case where the length of the first resonance path 151 is maintained constant, as the length of the first section 151 and the length of the second section 122 increase, it will help to reduce the width of the third section 123, It will soon help to reduce the width D12 of the first radiating element 120. In an embodiment, the length of the first section 121 and the length of the second section 122 may be more than twice the width of the third section 123, respectively.

The electronic device 100 further includes a substrate 160. The first radiating element 120, the second radiating element 130 and the ground plane 110 are disposed on a surface 161 of the substrate 160. In other words, the monopole antenna 140 can be, for example, a planar antenna. In an embodiment, the first section 121, the second section 122, the third section 123, and the second radiating element 130 may each be formed by a planar metal line. Furthermore, the first radiating element 120 and the second radiating element 130 are located between the side of the substrate 160 and the edge 111 of the ground plane 110. In addition, the spacing between the sides of the substrate 160 and the edge 111 of the ground plane 110, that is, the height D13 of the monopole antenna 140/antenna window, is between 2.5 mm and 4 mm. In an embodiment, the substrate 160 can be, for example, attached to the inner surface of the insulative housing 242 of FIG. 2, and the monopole antenna 140 can face the insulative housing 242, for example, via the substrate 160.

3 is a schematic diagram of an electronic device in accordance with another embodiment of the present invention. Compared with the embodiment of FIG. 1, the monopole antenna 340 in the electronic device 300 of FIG. 3 further includes a first matching component 310 and a second matching component 320. The first matching component 310 is spaced apart from the second radiating component 130 by a coupling pitch, and the first matching component 310 is further spaced apart from the third segment 123 of the first radiating component 120 by a coupling pitch. The second matching component 320 is electrically connected between the first matching component 310 and the ground plane 110.

Specifically, the first matching component 310 includes a first rectangular metal piece 311 and a second rectangular metal piece 312. The first edge of the first rectangular metal piece 311 is spaced apart from the second radiating element 130 by a coupling pitch, and the second edge of the first rectangular metal piece 311 is coupled to the third section 123 of the first radiating element 120. spacing. In addition, the third edge of the first rectangular metal piece 311 is electrically connected to the second rectangular metal piece 312. The second matching component 320 can be, for example, a metal wire. In addition, the first end of the metal wire is electrically connected to the first rectangular metal piece 311 and the second rectangular metal piece 312 , and the second end of the metal wire is electrically connected to the edge 111 of the ground plane 110 .

In operation, the feed signal generated by the transceiver can be coupled from the first radiating element 120 and the second radiating element 130 to the first matching element 310 through the coupling pitch. In addition, the first matching component 310 and the second matching component 320 can be used to adjust the impedance matching of the monopole antenna 340 in the second frequency band, thereby further improving the radiation efficiency of the monopole antenna 340 in the second frequency band and the second frequency band. bandwidth. It is worth mentioning that a person skilled in the art can selectively remove the second matching component 320 according to the design requirements. That is, in another embodiment, the first matching component 310 can be floated above the ground plane 110, that is, the first matching component 310 and the ground plane 110 are electrically disconnected from each other, and the electrons at this time The device 300 can adjust the impedance matching of the monopole antenna 340 in the second frequency band only through the first matching component 310.

4 is a S-parameter (S11) diagram of a monopole antenna in accordance with an embodiment of the present invention. Here, the curve 410 is an S parameter in which only the monopole antenna 340 of the first matching element 310 is disposed (S11), and the curve 420 is an S parameter of the monopole antenna 340 under the two matching elements 310 and 320 (S11). As shown by the curve 410, the second frequency band covered by the monopole antenna 340 can conform to the application requirements of the electronic device 300 in the 5 GHz band under the condition that the first matching component 310 is floating. Moreover, as shown by curve 420, as the second matching component 320 is added, the bandwidth of the second frequency band of the monopole antenna 340 (i.e., the 5 GHz band) can be further expanded. In addition, FIG. 5 is a radiation efficiency diagram of a monopole antenna in accordance with an embodiment of the present invention. Among them, the curves 510 and 520 are the radiation efficiencies under the setting and setting of the two matching elements 310 and 320, respectively. As shown in FIG. 5, with the addition of the two matching elements 310 and 320, the radiation efficiency of the monopole antenna 340 in the second frequency band can be increased by about 0.7 dB to 1.5 dB.

In summary, the first radiating element and the second radiating element in the electronic device of the present invention can form a monopole antenna. In addition, both the open slot of the first radiating element and the edge of the ground plane extend along a predetermined direction. Thereby, it will help to reduce the height of the monopole antenna or the antenna window in the Y-axis direction. In addition, the two resonant paths in the monopole antenna are 1/2 wavelength of the lowest frequency of the two frequency bands corresponding thereto, thereby reducing the influence of the capacitive effect caused by the metal environment on the monopole antenna. In other words, the monopole antenna has a low profile and is resistant to the effects of the surrounding metal environment. Thereby, the monopole antenna will meet the application requirements of the electronic device under the design of the narrow bezel. In addition, the feed point of the monopole antenna is located on one side of the overall antenna structure, which helps to simplify the complexity of the monopole antenna in the assembly.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100, 300‧‧‧ electronic devices
110‧‧‧ ground plane
111‧‧‧The edge of the ground plane
120‧‧‧First radiating element
121‧‧‧First section
122‧‧‧second section
123‧‧‧third section
130‧‧‧Second radiating element
101‧‧‧Open slot
140, 340‧‧‧ monopole antenna
151‧‧‧First resonance path
152‧‧‧Second resonance path
160‧‧‧Substrate
161‧‧‧ surface
FP1‧‧‧Feeding point
D11‧‧‧ length
D12‧‧‧Width
D13‧‧‧ Height
210‧‧‧First body
220‧‧‧Second body
230‧‧‧ pivot
240‧‧‧Border
241‧‧‧Electrical frame
242‧‧‧Insulated housing
250‧‧‧ display
D21‧‧‧ spacing
310‧‧‧First matching component
311‧‧‧First rectangular metal sheet
312‧‧‧Second rectangular metal sheet
320‧‧‧Second matching component
410, 420, 510, 520‧‧‧ curves

1 is a schematic diagram of an electronic device in accordance with an embodiment of the present invention. 2 is a schematic diagram of the appearance of an electronic device according to an embodiment of the invention. 3 is a schematic diagram of an electronic device in accordance with another embodiment of the present invention. 4 is a S-parameter (S11) diagram of a monopole antenna in accordance with an embodiment of the present invention. Figure 5 is a graph showing the radiation efficiency of a monopole antenna in accordance with an embodiment of the present invention.

Claims (10)

  1. An electronic device comprising: a ground plane including an edge extending along a predetermined direction; a first radiating element adjacent to the edge of the ground plane, and including an open slot extending along the predetermined direction, The first end of the first radiating element has a feeding point, the second end of the first radiating element is a first open end, and the first end and the second end of the first radiating element are located in the open slot And a second radiating element having a first end electrically connected to the first radiating element, a second end of the second radiating element being a second open end, and the first radiating element and the The second radiating element forms a monopole antenna operating in a first frequency band and a second frequency band, wherein the monopole antenna includes a first resonant path extending from the feed point to the first open end and from the feed a point extending to a second resonant path of the second open end, the length of the first resonant path being 1/2 wavelength of the lowest frequency of the first frequency band, and the length of the second resonant path being the lowest of the second frequency band 1/2 wavelength of the frequency.
  2. The electronic device of claim 1, wherein the first radiating element has an aspect ratio of not less than 4.
  3. The electronic device of claim 1, further comprising: a frame comprising: a conductive frame surrounding a display in the electronic device and electrically connected to the ground plane; and an insulating housing, Connecting a sidewall of the conductive frame, wherein the first radiating element and the second radiating element respectively face the insulating housing, and the insulating housing has a width of between 2.5 mm and 4 mm.
  4. The electronic device of claim 1, wherein the first radiating element comprises: a first segment having a first end having the feed point; and a second segment having a first end forming the first An open end; and a third section, the first end of the third section is electrically connected to the second end of the first section, and the second end of the third section is electrically connected to the second end of the second section The first segment and the second segment respectively extend along the predetermined direction, and the length of the first segment and the length of the second segment are twice the width of the third segment respectively. the above.
  5. The electronic device of claim 4, wherein the first end of the second radiating element is electrically connected to the second end of the third segment, the third segment is located at the second radiating element and the first Between the two segments, and the first segment, the third segment and the second radiating element form the second resonant path.
  6. The electronic device of claim 4, wherein the first segment, the second segment, the third segment, and the second radiating element are each formed by a planar metal wire.
  7. The electronic device of claim 4, wherein the first segment, the second segment and the second radiating element are parallel to the edge of the ground plane, the third segment being perpendicular to the ground plane The edge.
  8. The electronic device of claim 1, further comprising: a substrate, wherein the first radiating element, the second radiating element and the ground plane are disposed on a surface of the substrate, the first radiating element and The second radiating element is located between one side of the substrate and the edge of the ground plane, and a spacing between the side of the substrate and the edge of the ground plane is between 2.5 mm and 4 mm.
  9. The electronic device of claim 8, wherein the monopole antenna further comprises: a first matching component spaced apart from the second radiating component by a coupling pitch, the first matching component and the ground plane being electrically The upper matching elements are not connected, and the first matching component adjusts the impedance matching of the monopole antenna in the second frequency band.
  10. The electronic device of claim 8, wherein the monopole antenna further comprises: a first matching component spaced apart from the second radiating component by a coupling pitch; and a second matching component electrically connected thereto The first matching component is coupled to the ground plane, and the first matching component and the second matching component adjust impedance matching of the monopole antenna in the second frequency band.
TW105135210A 2016-10-31 2016-10-31 Electronic device TWI617095B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW105135210A TWI617095B (en) 2016-10-31 2016-10-31 Electronic device

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Application Number Priority Date Filing Date Title
TW105135210A TWI617095B (en) 2016-10-31 2016-10-31 Electronic device

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TWI617095B true TWI617095B (en) 2018-03-01
TW201818610A TW201818610A (en) 2018-05-16

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070080871A1 (en) * 2003-04-26 2007-04-12 Zhinong Ying Antenna device for communication equipment
TW200826371A (en) * 2006-12-15 2008-06-16 Z Com Inc Dipole antenna in wireless device
TW201017978A (en) * 2008-10-28 2010-05-01 Wistron Neweb Corp Wide-band planar antenna
TW201230494A (en) * 2011-01-07 2012-07-16 Primax Electronics Ltd Dual-band planar antenna
TW201533972A (en) * 2014-02-20 2015-09-01 Wistron Neweb Corp Broadband antenna

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070080871A1 (en) * 2003-04-26 2007-04-12 Zhinong Ying Antenna device for communication equipment
TW200826371A (en) * 2006-12-15 2008-06-16 Z Com Inc Dipole antenna in wireless device
TW201017978A (en) * 2008-10-28 2010-05-01 Wistron Neweb Corp Wide-band planar antenna
TW201230494A (en) * 2011-01-07 2012-07-16 Primax Electronics Ltd Dual-band planar antenna
TW201533972A (en) * 2014-02-20 2015-09-01 Wistron Neweb Corp Broadband antenna

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