TWI708431B - Antenna without clearance area - Google Patents

Abstract

An antenna without clearance area comprises a metal casing, a microwave substrate, a protruding grounding portion, a first antenna, a feeding portion, a first coupling antenna and a second coupling antenna. The microwave substrate is contained in an inner side and adjacent to an edge side of the metal casing. The protruding grounding portion extends from a ground plane of the microwave substrate to the edge side. The first antenna is connected to the protruding grounding portion. A first branch and a second branch of the first antenna extend away from each other. Both the first branch and the second branch are parallel to the edge side. The first branch is longer than the second branch. The feeding portion extends from the position of the protruding grounding portion to the second branch for connecting with a feeding portion on the second branch. A first grounding portion of the first coupling antenna is connected to the ground plane. A first end portion of the first coupling antenna is for coupling energy form the first branch. A second grounding portion of the second coupling antenna is connected to the protruding grounding portion. A second portion of the second coupling antenna is for coupling energy from the second branch. Thus, space occupied by the antenna can be saved without using clearance area.

Description

Antenna without headroom

The invention relates to an antenna, and in particular to an antenna without a headroom.

Based on the development of wireless communication technology and the Internet, terminal devices such as notebook computers, tablet computers, and all-in-one computers must have the function of wireless data transmission. Wireless transmission must use antenna elements, and the requirements for antenna performance are getting higher and higher. Traditionally, in order to make antenna performance meet the requirements of wireless specifications, it is necessary to set up an antenna clearance area, such as vacant space on the circuit board or specially set up a metal-free area. (Or conductor) interference area to facilitate the performance of the antenna.

However, the appearance design of the current terminal device is based on aesthetic concepts such as visual beauty, simplicity, and texture. Therefore, the antenna design is mainly based on hidden antennas. If the antenna is hidden in the case, the terminal device may not be affected. Appearance. However, in order to achieve more texture and beauty, it is common to use a metal shell as the concept of shell design. In this way, the antenna efficiency is easily affected by the shielding of the metal shell, and the traditional design concept of setting the antenna clearance area is also difficult to apply to this type of product. As far as terminal devices are concerned, the design requirements of the hidden antenna and the appearance requirements of the metal casing increase the difficulty of antenna design. Therefore, the design of a built-in antenna with a metal casing is a challenge for antenna developers.

In order to solve the aforementioned prior art problems, an embodiment of the present invention provides an antenna without a headroom, including a metal shell, a microwave substrate, a protruding ground portion, a first antenna, a feeding portion, a first coupling antenna, and a second coupling antenna . The microwave substrate and the metal casing are fixed to each other while keeping a distance, and the microwave substrate is accommodated inside the metal casing and adjacent to the edge side of the metal casing, and the microwave substrate has a ground surface. The protruding ground portion is located on the microwave substrate and extends from the ground surface toward the edge of the metal shell. The first antenna is located on the microwave substrate and is connected to the protruding ground part. The first antenna has a first branch, a second branch, a ground branch and a feeding end. The first branch and the second branch extend in directions away from each other, The first branch and the second branch are both parallel to the edge side of the metal shell. The first branch is longer than the second branch. The grounding branch is connected to the protruding grounding part, and the feeding end is located at the second branch. The feeding portion extends from the position where the ground portion protrudes to the second branch, and is connected to the feeding end of the second branch, wherein the feeding portion and the grounding branch are parallel to each other. The first coupling antenna is located on the microwave substrate. The first coupling antenna has a first grounding portion and a first end portion. The first grounding portion is connected to the ground plane. The first end portion of the first coupling antenna and the first branch maintain a first coupling distance. Used to couple energy. The second coupling antenna is located on the microwave substrate. The second coupling antenna has a second ground portion and a second end portion. The second ground portion is connected to the protruding ground portion. The second end portion of the second coupling antenna and the second branch maintain a second coupling Distance, used to couple energy.

To sum up, the embodiments of the present invention provide an antenna without a headroom, which is suitable for wireless terminal products with a metal shell. The design of the protruding ground part is used to help when the available space of the antenna is narrow. The impedance matching is better, the antenna radiation efficiency is improved, the internal space of the body is less, the antenna height is low, and it can be applied to at least dual-band wireless transmission. It has high industrial application value.

In order to further understand the features and technical content of the present invention, please Please refer to the following detailed descriptions and drawings of the present invention, but these descriptions and the accompanying drawings are only used to illustrate the present invention, and not to limit the scope of the present invention.

1. Antenna without headroom

9‧‧‧Screen Panel

1a‧‧‧Symmetrical antenna without headroom

11‧‧‧Metal shell

111‧‧‧Edge side

12‧‧‧Microwave substrate

120‧‧‧Ground surface

13‧‧‧Protruding ground

14‧‧‧First antenna

15‧‧‧Inlet

16‧‧‧First coupling antenna

17‧‧‧Second coupling antenna

141‧‧‧First branch

142‧‧‧Second branch

143‧‧‧Grounding branch

144‧‧‧Inlet

161‧‧‧First grounding part

162‧‧‧First end

171‧‧‧Second grounding part

172‧‧‧Second end

172a‧‧‧Connecting part

172b‧‧‧Coupling part

121‧‧‧First side

122‧‧‧Second side

123‧‧‧ third side

124‧‧‧Fourth side

FIG. 1 is a schematic diagram of an antenna without a headroom area provided in an embodiment of the present invention installed in a metal casing.

FIG. 2 is a top view of an antenna without a headroom area provided in an embodiment of the present invention installed in a metal shell.

FIG. 3 is a schematic diagram of an antenna without a headroom provided in a metal casing of a notebook computer according to an embodiment of the present invention.

Fig. 4 is a front view of an antenna without a headroom provided by an embodiment of the present invention.

Fig. 5 is a return loss diagram of an antenna without a headroom area provided by an embodiment of the present invention.

Please refer to Figure 1, Figure 2 and Figure 3. Figure 1 is a schematic diagram of an antenna without a headroom area provided in an embodiment of the present invention installed in a metal casing, and Figure 2 is an antenna installation without a headroom area provided by an embodiment of the present invention In the top view of the metal casing, FIG. 3 is a schematic diagram of the antenna without headroom area provided in the metal casing of a notebook computer according to an embodiment of the present invention. The notebook computer has an antenna without headroom area on the upper side of the screen panel 9 1, and Figures 1 to 3 show the surrounding case of the screen panel 9 is removed to facilitate the display of the antenna without headroom area of the embodiment of the present invention. The surrounding case of the screen panel 9 is non-metallic (or non-conductor), and The back panel of the screen is a metal case, making the case of the notebook computer all metal. The antenna 1 with no headroom area of this embodiment is used, for example, with a metal casing Notebook computer. Referring again to FIG. 3, the notebook computer embodiment of FIG. 3 further includes a symmetrical antenna 1a with no headroom area. The structure of the symmetrical antenna 1a with no headroom area is symmetrical to the antenna 1 without headroom, so that the notebook computer can use two at the same time. A symmetrical structure antenna, using two antennas can achieve better signal transmission and reception effects. Next, referring to FIG. 1 together, please refer to the detailed structure of the antenna 1 without headroom area shown in FIG. 4. The antenna 1 without a headroom area includes a metal casing 11, a microwave substrate 12, a protruding ground portion 13, a first antenna 14, a feeding portion 15, a first coupling antenna 16 and a second coupling antenna 17. Referring to FIG. 2, the microwave substrate 12 and the metal casing 11 are fixed to each other while keeping a distance, and the microwave substrate 12 is accommodated inside the metal casing 11 and adjacent to the edge side 111 of the metal casing 11. When applied to wireless network specifications, the above-mentioned spacing can be as small as 4 millimeters (mm). The microwave substrate 12 has a ground plane 120. The protruding ground portion 13 is located on the microwave substrate 12 and extends from the ground surface 120 toward the edge side 111 of the metal shell 11. The first antenna 14 is located on the microwave substrate 12 and connected to the protruding ground portion 13. The first antenna 14 has a first branch 141, a second branch 142, a ground branch 143, and a feeding end 144. The first branch 141 and the second branch The branches 142 extend away from each other. The first branch 141 and the second branch 142 are both parallel to the edge side 111 of the metal shell 11, the first branch 141 is longer than the second branch 142, and the grounding branch 143 is connected to the ground. In section 13, the feeding end 144 is located at the second branch 142. The feeding portion 15 extends from the position where the ground portion 13 protrudes to the second branch 142, and is connected to the feeding end 144 of the second branch 142, wherein the feeding portion 15 and the ground branch 143 are parallel to each other. The first coupling antenna 16 is located on the microwave substrate 12. The first coupling antenna 16 has a first ground portion 161 and a first end portion 162. The first ground portion 161 is connected to the ground plane 120. The first end portion 162 of the first coupling antenna 16 and The first branch 141 maintains a first coupling distance for coupling energy. The second coupling antenna 17 is located on the microwave substrate 12. The second coupling antenna 17 has a second ground portion 171 and a second end portion 172, and the second ground portion 171 is connected to the protruding ground portion 13. The second end portion 172 of the second coupling antenna 17 and the second branch 142 maintain a second coupling distance for coupling energy.

Furthermore, the feeding part 15 is preferably a center conductor of a coaxial cable. Moreover, preferably, the microwave substrate 12 has four sides, which are a first side 121, a second side 122, a third side 123, and a fourth side 124, respectively. The first side 121 and the second side The sides 122 are opposite to each other, the third side 123 is connected between the first side 121 and the second side 122, the fourth side 124 is connected between the first side 121 and the second side 122, and the fourth side The side 124 is closer to the edge side 111 of the metal housing 11 than the third side 123, and the fourth side 124 is parallel to the edge side 111 of the metal housing 11. The first branch 141 of the first antenna 14 extends toward the first side 121, and the second branch 142 of the first antenna 14 extends toward the second side 122. Furthermore, the first coupling antenna 16 of this embodiment is, for example, L-shaped, the first ground portion 161 and the first end portion 162 of the first coupling antenna 16 are connected perpendicularly to each other, and the first end portion 162 of the first coupling antenna 16 The first branches 141 of the first antenna 14 are parallel to each other. The second ground portion 171 of the second coupling antenna 17 extends from the protruding ground portion 13 toward the second side 122 of the microwave substrate 12. The second end portion 172 includes a connecting portion 172a and a coupling portion 172b, and the connecting portion 172a and the second ground The portions 171 are perpendicularly connected to each other, the connecting portion 172a and the coupling portion 172b are perpendicularly connected to each other, and the coupling portion 172b and the second branch 142 of the first antenna 14 are parallel to each other. Furthermore, when the metal casing 11 is the casing of a notebook computer, the microwave substrate 12 may be connected to a circuit substrate, and the circuit substrate may be a screen panel of the notebook computer, such as the screen panel 9 shown in FIG. 3.

Please refer to the return loss diagram shown in FIG. 5, when applied to wireless network specifications, the first branch 141 of the first antenna 14 works in the 2.4 GHz frequency band, and the second branch 142 of the first antenna 14 and the first coupling The antenna 16 and the second coupling antenna 17 work in the 5 GHz frequency band. When the length of the microwave substrate 12 does not exceed 30 mm, and the width does not exceed 8.5 mm Under the size limit of meters (that is, the fourth side 124 or the third side 123 is the long side and the length does not exceed 30 mm; the first side 121 or the second side 122 is the short side and the length does not exceed 8.5 mm), And when the distance between the microwave substrate 12 and the edge side 111 of the metal shell 11 is 4 mm, good impedance matching can be achieved, and the antenna efficiency can reach more than 40%.

To sum up, the antenna without headroom provided by the embodiments of the present invention can be applied to wireless terminal products with metal shells, and the design of the protruding grounding part is used to help when the antenna available space is narrow, The impedance matching is better, the antenna radiation efficiency is improved, the internal space of the body is less, the antenna height is low, and it can be applied to at least dual-band wireless transmission. It has high industrial application value. Especially, for the metal shell terminal device of the local wireless network, it is more competitive in the antenna product market.

The above are only the embodiments of the present invention, and they are not intended to limit the patent scope of the present invention.

9: Screen panel

11: Metal shell

111: Edge side

120: Ground plane

13: Protruding ground

14: The first antenna

16: first coupling antenna

17: Second coupling antenna

Claims (9)

An antenna without a headroom area, comprising: a metal shell; a microwave substrate, which is fixedly connected to each other while maintaining a distance from the metal shell, and the microwave substrate is accommodated inside the metal shell and adjacent to the metal shell On an edge side of the body, the microwave substrate has a ground surface; a protruding ground portion is located on the microwave substrate and extends from the ground surface toward the edge side of the metal shell; a first antenna is located on the microwave substrate The substrate is connected to the protruding ground portion, wherein the first antenna has a first branch, a second branch, a ground branch, and a feeding end, and the first branch and the second branch are in directions away from each other Extending, the first branch and the second branch are both parallel to the edge side of the metal shell, the first branch is longer than the second branch, the grounding branch is connected to the protruding grounding portion, and the feeding end is located at The second branch; a feeding portion extending from the position of the protruding ground portion to the second branch, and connected to the feeding end of the second branch, wherein the feeding portion and the grounding branch are parallel to each other; A coupling antenna is located on the microwave substrate. The first coupling antenna has a first ground portion and a first end portion, the first ground portion is connected to the ground plane, and the first end portion of the first coupling antenna is connected to the The first branch maintains a first coupling distance for coupling energy; and a second coupling antenna located on the microwave substrate. The second coupling antenna has a second ground portion and a second end portion, the second ground portion Connecting to the protruding ground portion, the second end portion of the second coupling antenna and the second branch maintain a second coupling distance Separately for coupling energy; wherein, the metal shell is a shell of a notebook computer, the microwave substrate is connected to a circuit substrate, and the circuit substrate is a screen panel of the notebook computer. The antenna without headroom area according to claim 1, wherein the feeding part is a center conductor of a coaxial cable. The antenna without a headroom area according to claim 1, wherein the microwave substrate has four sides, which are a first side, a second side, a third side, and a fourth side, respectively , The first side and the second side are opposite to each other, the third side is connected between the first side and the second side, and the fourth side is connected between the first side and the Between the second side edges, the fourth side edge is closer to the edge side of the metal shell than the third side edge, and the fourth side edge is parallel to the edge side of the metal shell. The antenna without a headroom area according to claim 3, wherein the first branch of the first antenna extends towards the first side, and the second branch of the first antenna faces the second side extend. The antenna without headroom area according to claim 4, wherein the first coupling antenna is L-shaped, the first ground portion and the first end portion of the first coupling antenna are connected perpendicularly to each other, and the first The first end portion of the coupling antenna and the first branch of the first antenna are parallel to each other. The antenna without a headroom area according to claim 4, wherein the second ground portion of the second coupling antenna extends from the protruding ground portion toward the second side of the microwave substrate, and the second end portion It includes a connecting portion and a coupling portion, the connecting portion and the second ground portion are connected perpendicularly to each other, the connecting portion and the coupling portion are connected perpendicularly to each other, and the coupling portion and the second branch of the first antenna are connected to each other. parallel. The antenna without headroom area according to claim 1, wherein the first antenna The first branch works in the 2.4 GHz frequency band, and the second branch of the first antenna, the first coupling antenna and the second coupling antenna work in the 5 GHz frequency band. The antenna without a headroom area according to claim 7, wherein the distance between the microwave substrate and the edge side of the metal casing is 4 millimeters (mm). The antenna without a headroom area according to claim 1, wherein the notebook computer further includes a symmetrical antenna without headroom area, and the structure of the symmetrical antenna without headroom area is symmetrical to the antenna without headroom area.

Images