TWI658642B - Antenna device and electronic device using the same - Google Patents

Abstract

An antenna device is disposed in a metal casing. The antenna device includes a metal antenna and a ceramic antenna. The metal antenna has a disjoint first end and a second end. The ceramic antenna is disposed in a space defined by the metal antenna. The first end is connected to the ceramic antenna, and the second end is a free end.

Description

Antenna device and electronic device using the same

The invention relates to an antenna device and an electronic device using the antenna device.

The antenna is a common signal communication component, and it is often used in electronic devices using wireless communication signals such as Bluetooth and 3G, such as electronic devices such as mobile terminals, remote controllers, and wireless mice. At present, common wireless communication devices are increasingly using metal casings due to aesthetic requirements. However, the metallic shell will interfere with the antenna built in the shell and affect the stability and distance of signal transmission. Therefore, how to mitigate the interference of metal casings to wireless signals needs further research.

In view of the above, it is necessary to provide an antenna device that is beneficial to mitigate interference of a metal case to wireless signals.

An antenna device is disposed in a metal casing. The antenna device includes a metal antenna and a ceramic antenna. The metal antenna has a disjoint first end and a second end. The ceramic antenna is disposed in a space defined by the metal antenna. The first end is connected to the ceramic antenna, and the second end is a free end.

It is also necessary to provide an electronic device using the antenna device.

Compared with the conventional technology, the antenna device of the present invention is a combination of a metal antenna and a ceramic antenna. Compared with a ceramic antenna alone, the antenna device of the present invention can effectively reduce the metal casing. Interference to wireless signals, thereby improving signal transmission capabilities.

10, 20‧‧‧ wireless communication equipment

100, 200‧‧‧ antenna device

110, 210‧‧‧ metal casing

111, 211‧‧‧ front

1110, 2110 ‧‧‧ convex strip

112,212‧‧‧Rear

120, 220‧‧‧metal antenna

121, 221‧‧‧ first end

122, 222‧‧‧ second end

223‧‧‧radians

130, 230‧‧‧ceramic antenna

140, 240‧‧‧bearing bracket

101, 201‧‧‧ front cover

FIG. 1 is a schematic three-dimensional structure diagram of a wireless communication device according to a preferred embodiment of the present invention.

FIG. 2 is a schematic structural diagram of the antenna device in FIG. 1.

FIG. 3 is a schematic three-dimensional structure diagram of a wireless communication device according to another preferred embodiment of the present invention.

FIG. 4 is a schematic structural diagram of the antenna device in FIG. 3.

FIG. 5 is an output power diagram of the antenna device when only a ceramic antenna is used.

FIG. 6 is an output power diagram of the antenna device when a ceramic antenna is combined with a metal antenna.

The embodiments of the present invention will be further described in detail with reference to the accompanying drawings, wherein the present invention is described by taking a bottom gate thin film transistor as an example.

Please refer to FIG. 1 and FIG. 2 at the same time. FIG. 1 is a schematic diagram of a three-dimensional structure of an electronic device 10 according to a preferred embodiment of the present invention. The electronic device 10 uses the antenna device 100 according to the first embodiment of the present invention as shown in FIG. 2. . The electronic device 10 of this embodiment, for example, a remote controller, may be a remote controller such as a projector, a television, a set-top box, or a game console. The electronic device 10 can be used for transmitting 2.4G signals or Bluetooth signals, for example.

The electronic device 10 includes the antenna device 100, a metal casing 110, a front cover 101 and internal components (not labeled). The metal case 110 is a hollow conductive case integrally formed, and the internal components and the antenna device 100 are installed in the metal case 110. For convenience of explanation, it is defined that the metal casing 110 has a front portion 111 and a rear portion 112. The front portion 111 refers to the end closer to the controlled object when using the electronic device 10, and accordingly, the farther away from the controlled object One end is the rear portion 112. For example, when the electronic device 10 is a projector remote control, the controlled object is the projector. The front cover 101 is disposed on the front portion 111 of the metal casing 110, so that the internal components and the antenna device 100 are accommodated in a receiving space composed of the metal casing 110 and the front cover 101. In this embodiment, the metal casing 110 may be the electronic device. In addition to housing the antenna device 100, the housing of the 10 body can further contain other components required for the operation of the electronic device 10.

The antenna device 100 includes a metal antenna 120 and a ceramic antenna 130 connected to the metal antenna 120. Further, the metal antenna 120 is circumferentially attached to the inner wall of the metal case 110 and is insulated from the metal case 110. In this embodiment, the metal antenna 120 has a loop structure. The metal antenna 120 has a first end 121 and a second end 122. The first end 121 is connected to the ceramic antenna 130. In this embodiment, the first One end 121 is connected to the ceramic antenna 130 by welding, and the first end 121 extends from the inner wall of the metal case 110 into a receiving space defined by the metal case 110 so as to communicate with the receiving space defined in the receiving space. The ceramic antenna 130 is connected. The second end 122 is a free end. The material of the metal antenna 120 is a semi-rigid material that can be easily shaped, such as silver or copper.

Further, in a modified embodiment, one of the metal antenna 120 is bent between the first end 121 and the second end 122 to form an arc, thereby changing the radiation field of the metal antenna 120. Shape to improve signal transmission efficiency. Of course, the metal antenna 120 may have two or more bends, and is not limited to only one bend.

An inner wall of the front portion 111 of the metal casing 110 is inwardly formed to form a ring-shaped ridge 1110. The metal antenna 120 abuts on the surface of the ring-shaped ridge 1110 and faces the direction of wireless signal transmission. This arrangement helps to make more wireless signals transmitted by the metal antenna 120 forward, and reduces signal loss. Specifically, part of the wireless signal transmitted by the metal antenna 120 is forwarded, and part of the wireless signal that is reflected after reaching the metal casing 110 is further transmitted forward.

In this embodiment, the metal casing 110 is anodized to be insulated from the metal antenna 120. Among them, anodization is a metal surface treatment process. A metal material is an electrolyte protection technology in which an oxide film is formed on the surface of the metal material in an electrolyte solution.

The ceramic antenna 130 is disposed in the metal antenna 120 in a loop structure and has a structure surrounded by the metal antenna 120. The ceramic antenna 130 is supported and fixed by a supporting bracket 140, which is fixed in the metal casing 110. In this embodiment, the supporting bracket 140 is a printed circuit board (PCB). The metal antenna 120 is, for example, a strip, and the ceramic antenna 130 is, for example, a sheet.

Please refer to FIG. 3 and FIG. 4 at the same time. FIG. 3 is a schematic diagram of a three-dimensional structure of an electronic device 20 according to another preferred embodiment of the present invention. The electronic device 20 uses the antenna device according to the second embodiment of the present invention as shown in FIG. 4. 200. The electronic device 20 of the present embodiment should be an electronic device 20, such as a remote control, which may be a remote control such as a projector, a television, a set-top box, or a game machine. The electronic device 20 can be used to transmit a 2.4G signal or a Bluetooth signal, for example.

The electronic device 20 includes the antenna device 200, a metal casing 210, a front cover 201, and internal components (not labeled). The metal case 210 is a hollow conductive case integrally formed, and the internal components and the antenna device 20 are installed in the metal case 210. For convenience, it is defined that the metal casing 210 has a front portion 211 and a rear portion 212. The front portion 211 refers to the end closer to the controlled object when using the electronic device 20, and accordingly, the end farther from the controlled object. It is the rear portion 212. For example, when the electronic device 20 is a projector remote controller, the controlled object is the projector. The front cover 201 is disposed on the front portion 211 of the metal casing 210, so that the internal components and the antenna device 200 are contained in a space formed by the metal casing 210 and the front cover 201. In this embodiment, the metal casing 210 may be a casing of the main body of the electronic device 2. In addition to receiving the antenna device 200, the metal casing 210 may further accommodate other devices required for the electronic device 200 to work.

The antenna device 200 includes a metal antenna 220 and a ceramic antenna 230 connected to the metal antenna 220. Further, the metal antenna 220 is circumferentially attached to the inner wall of the front portion 211 of the metal case 210 and is insulated from the metal case 210. In this embodiment, the metal antenna 220 has a loop structure. The metal antenna 220 has a first end 221 and a second end 222. The first end 221 is connected to the ceramic antenna 230. In this embodiment, the first One end 221 is connected to the ceramic antenna 230 by welding, and the first end 221 extends from the inner wall of the metal case 210 into a receiving space defined by the metal case 210, so as to communicate with the receiving space provided in the receiving space. The ceramic antenna 230 is connected. The second end 222 is a free end. In this embodiment, the metal antenna 220 is an enameled wire. The enameled wire is composed of a metal wire and an insulating layer. The metal wire is annealed and softened, and then painted and baked multiple times.

Further, in a modified embodiment, one of the first end 221 and the second end 222 of the metal antenna 220 is bent to form an arc 223 to change the radiation of the metal antenna 220. Field shape, thereby reducing the Interference to the signal. Of course, the metal antenna 220 may have two or more bends, and is not limited to only one bend. The material of the metal wire of the metal antenna 220 in this embodiment is a semi-rigid material that can be easily shaped, such as silver or copper.

The inner wall of the front portion 211 of the metal casing 210 is inwardly formed to form a ring-shaped convex strip 2110. The metal antenna 220 abuts on the surface of the ring-shaped convex strip 2110 and faces the direction of wireless signal transmission. This arrangement helps to make more wireless signals transmitted by the metal antenna 220 forward, and reduces signal loss. Specifically, a part of the wireless signal transmitted by the metal antenna 220 is forwarded, and a part of the wireless signal that is reflected after reaching the metal housing 210 is transmitted forward further.

The ceramic antenna 230 is disposed in the metal antenna 220 in a loop structure, and has a structure surrounded by the metal antenna 220. The ceramic antenna 230 is supported and fixed by a supporting bracket 240, which is fixed in the metal casing 210. In this embodiment, the supporting bracket 140 is a printed circuit board (PCB). The metal antenna 220 is, for example, a strip, and the ceramic antenna 230 is, for example, a sheet.

Figures 5 to 6 show output power diagrams when different antenna devices are used to transmit 2.4G wireless signals under the same conditions. Among them, FIG. 5 is an output power diagram of the antenna device when only a ceramic antenna is used, and FIG. 6 is an output power diagram of the antenna devices 100 and 200 using the present invention. It can be seen from the figure that the output power of the antenna devices 100 and 200 is high. After further analysis, the antenna devices 100 and 200 can effectively reduce the interference of the metal casing to the wireless signal and improve the signal transmission capacity, so the output power is high. . In addition, when the antenna devices 100 and 200 of the present invention are disposed in the metal casings 110 and 210, the signal radiation distance can reach 30 meters, which is only 6 when the ceramic antenna of the prior art is disposed in the metal casing. To 7 meters, the signal radiation distance of the antenna device of the present invention is farther.

In summary, this creation complies with the elements of an invention patent, and a patent application is filed in accordance with the law. However, the above is only a preferred embodiment of this creation, and the scope of this creation is not limited to the above embodiments. For example, those who are familiar with the skills of this case make equivalent modifications or changes based on the spirit of this creation. It should be covered by the following patent applications.

Claims (10)

An antenna device is disposed in a metal casing, and the metal casing surrounds a receiving space, including: a metal antenna and a ceramic antenna; the metal antenna has a loop structure, and the metal antenna has a disjoint first end And the second end; the ceramic antenna is disposed in the receiving space, the first end extends from the inner wall of the metal case into the receiving space and is connected to the ceramic antenna, and the metal antenna is removed from the receiving space Parts other than the first end are attached to the inner wall of the metal casing, and the second end is a free end. The antenna device according to claim 1, wherein the metal antenna and the metal case are insulated from each other. The antenna device according to claim 1, wherein the metal case is anodized to be insulated from the metal antenna. The antenna device according to claim 1, wherein an inner wall of the metal casing is convexly formed to form a circular convex strip, and the metal antenna is abutted against a surface of the circular convex strip. The antenna device according to claim 1, wherein the metal antenna is an enameled wire. The antenna device according to claim 1, wherein at least one place between the first end and the second end of the metal antenna is bent to form an arc. The antenna device according to claim 1, wherein the antenna device further comprises a bearing bracket, and the ceramic antenna is fixed to the bearing bracket. The antenna device according to claim 1, wherein the metal antenna has a strip shape, and the ceramic antenna has a sheet shape. An electronic device includes the antenna device according to any one of claims 1 to 8. The electronic device according to claim 9, wherein the metal casing is a casing constituting a main body of the electronic device.