TWI665820B - Antenna module and wearable device with same - Google Patents

Abstract

The invention provides an antenna module, which includes a main body, a housing, and a substrate. The main body has a receiving space. The substrate is received in the receiving space. The housing is made of a conductive material. On the outer peripheral wall of the body, the substrate feeds current to the housing and provides grounding, and the housing is used for transmitting and receiving wireless signals.

Description

Antenna module and wearable electronic device having the same

The invention relates to an antenna module and a wearable electronic device having the antenna module.

At present, there are more and more types of wearable electronic devices, such as smart watches, especially in combination with modern information technology, which make the functions of wearable electronic devices rich and colorful, such as watches with call functions, smart voice watches, and so on. Most of these wearable electronic devices require signal transmitting and receiving devices (such as antennas). However, as the wearable electronic device develops a metallized appearance and a thinning trend, the space for accommodating the antenna becomes smaller and smaller. Therefore, how to maintain the transmission characteristics of the antenna in a limited space is an important issue for antenna design.

In view of this, it is necessary to provide an antenna module designed with a metal case and a wearable electronic device having the antenna module.

An antenna module includes a body, a housing, and a substrate. The body has a receiving space, the substrate is received in the receiving space, the housing is made of a conductive material, and the housing is disposed on the body. On the outer peripheral wall, the substrate feeds current to the casing and provides ground, and the casing is used for receiving and transmitting wireless signals.

A wearable electronic device includes a dial, a case, and a substrate. There is a storage space in which the substrate is housed, the watch case is made of a conductive material, the watch case is disposed on the outer peripheral wall of the dial, and the substrate feeds current to the watch case and A ground is provided, and the case is used for transmitting and receiving wireless signals.

The above-mentioned wearable electronic device enables the housing to have both the function of transmitting and receiving wireless signals, so that it is not necessary to add an additional antenna module, which can reduce the size and space of the antenna and reduce the cost.

200‧‧‧ Wearable electronic device

100‧‧‧ Antenna Module

11‧‧‧ Ontology

111‧‧‧ Containment space

13‧‧‧ substrate

131‧‧‧feed point

133‧‧‧ ground

15‧‧‧shell

151‧‧‧Gap

153‧‧‧ear

17‧‧‧Isolation Department

19‧‧‧Connector

191‧‧‧First connection

193‧‧‧Second connection section

21‧‧‧display unit

FIG. 1 is a schematic structural diagram of a wearable electronic device according to a preferred embodiment of the present invention.

FIG. 2 is a cross-sectional view of the wearable electronic device shown in FIG. 1.

FIG. 3 is a partially exploded view of the wearable electronic device shown in FIG. 1.

FIG. 4 is a graph of S parameters (scattering parameters) of the wearable electronic device shown in FIG. 1.

FIG. 5 is a radiation efficiency graph of the wearable electronic device shown in FIG. 1.

FIG. 6 is a graph of the total radiation efficiency of the wearable electronic device shown in FIG. 1.

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those with ordinary knowledge in the art without any creative labor belong to the protection scope of the present invention.

It should be noted that when an element is called "electrically connected" to another element, it may be directly on the other element or there may be a centered element. When a component is considered "electrically connected "Connecting" another component, which may be a contact connection, for example, a wire connection method, or a non-contact connection, for example, a non-contact coupling method.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

Referring to FIG. 1, a preferred embodiment of the present invention provides an antenna module 100 that can be applied to a wearable electronic device 200 such as a smart watch to transmit and receive radio waves to transmit and exchange wireless signals. In this embodiment, the antenna module 100 is applied to a smart watch as an example for description.

Please refer to FIG. 2 and FIG. 3 together. The antenna module 100 includes a main body 11, a substrate 13, a housing 15, an isolation portion 17, and a connecting member 19.

The body 11 may be a dial of the wearable electronic device 200. The body 11 may be made of an insulating material (such as plastic) or a conductive material (such as metal). In this embodiment, the body 11 is substantially circular. Of course, it can be understood that the shape of the main body 11 is not limited to the circular shape, and may be other shapes, such as a square shape or an oval shape. The main body 11 is formed with a receiving space 111 (see FIG. 3) for receiving the substrate 13 and electronic components (not shown).

In this embodiment, the substrate 13 is a printed circuit board (PCB), which can be made of a dielectric material such as epoxy glass fiber (FR4). The substrate 13 Set in the receiving space 111. The substrate 13 is provided with a feeding point 131 and a ground point 133 for feeding signals and providing ground for the antenna module 100, respectively.

The casing 15 may be a case of the wearable electronic device 200 and is used to perform the function of transmitting and receiving wireless signals of the antenna. The casing 15 is made of a conductive material (for example, metal). The casing 15 is disposed around the body 11 and is spaced apart from the body 11, so that a gap 151 is formed between the casing 15 and the body 11.

In this embodiment, the isolation portion 17 is made of an insulating material (such as plastic). The isolation portion 17 is disposed in the gap 151 to isolate the body 11 from the casing 15.

It can be understood that, in other embodiments, if the body 11 is made of an insulating material, the isolation portion 17 and the gap 151 are not needed, and the case 15 and the body 11 can be directly connected.

In this embodiment, the connecting member 19 includes a first connecting portion 191 and a second connecting portion 193. One end of the first connection portion 191 is electrically connected to the feeding point 131, and the other end is electrically connected to the housing 15. One end of the second connection portion 193 is connected to the ground point 133, and the other end is electrically connected to the casing 15. In this way, the casing 15 serves as a radiator of the antenna module 100, and is fed with current through the feeding point 131 and grounded through the ground point 133, respectively.

It can be understood that, in the present example, the first connection portion 191 may be a data cable, a metal elastic piece, a metal screw, or other electrical connection structure. Similarly, the second connection portion 193 may be a data line, a metal elastic piece, a metal screw, or other electrical connection structure.

Please refer to FIG. 1 and FIG. 2 again. It can be understood that when the antenna module 100 is applied to the wearable electronic device 200, the wearable electronic device 200 further includes a display unit 21 and Wrist strap (not shown). The display unit 21 may be a liquid crystal module (LCM), which is disposed on the surface of the body 11 and is electrically connected to the substrate 13.

The wristband is used for the wearable electronic device 200 to be worn by a user in a wristband manner. Specifically, two sides of the casing 15 are respectively provided with ear portions 153. The wristband is mounted on the ear portion 153 for relatively stable wearing the wearable electronic device 200 to a user's wrist.

During installation, the substrate 13 is accommodated in the accommodating space 111. The housing 15 is spaced from the body 11 and is connected to the substrate 13 through a feeding point 131 and a ground point 133. The display unit 21 is located above the main body 11 and is held by the main body 11. In use, the current signal enters the housing 15 through the feed point 131 and is grounded through the ground point 133. At this time, the casing 15 forms a loop antenna. By adjusting the positions of the feed point 131 and the ground point 133, the wearable electronic device 100 can work in the 2.40-2.45 GHz frequency band, and then send and receive Bluetooth signals.

FIG. 4 is a graph of S parameters (scattering parameters) of the wearable electronic device 200. The curve 41 represents the S11 value when the wearable electronic device 200 is not worn on a user's wrist. The curve 42 represents the S11 value when the wearable electronic device 200 is worn on a user's wrist.

FIG. 5 is a radiation efficiency graph of the wearable electronic device 200. The curve S51 represents the radiation efficiency when the wearable electronic device 200 is not worn on a user's hand. The curve S52 represents the radiation efficiency when the wearable electronic device 200 is worn on a user's hand.

FIG. 6 is a graph of the total radiation efficiency of the wearable electronic device 200. The curve S61 represents the total radiation efficiency when the wearable electronic device 200 is not worn by the user. The curve S62 represents the total radiation efficiency when the wearable electronic device 200 is worn on a user's hand.

Obviously, it can be clearly seen from FIGS. 4 to 6 that the wearable electronic device 200 according to the preferred embodiment of the present invention has good antenna characteristics in the frequency band of 2.40-2.45GHz.

The wearable electronic device 200 of the present invention enables the casing 15 to have both the function of transmitting and receiving wireless signals by the antenna. In this way, the wearable electronic device 200 does not need to add an additional antenna module, which can reduce the antenna size and occupied space, and achieve the effect of reducing costs.

The above descriptions are merely preferred embodiments of the present invention, and are not intended to limit the present invention in any form. In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made in accordance with the spirit of the present invention should be included in the scope of the present invention.

Claims (6)

An antenna module includes a body, a casing, a substrate, and an isolation portion. The body has a receiving space, the substrate is received in the receiving space, the casing is made of a conductive material, and the body is made of an insulating material. It is made that the casing is disposed on the outer peripheral wall of the body, and the casing is disposed at a distance from the body, thereby forming a gap between the body and the casing, and the isolation portion is disposed at The gap is used to isolate the body and the casing, the substrate feeds current to the casing and provides grounding, the casing is used to send and receive wireless signals, and the substrate is provided with a feeding point and A ground point, the feed point is used to feed current to the case, the ground point is used to provide ground to the case, the antenna module further includes a connector, and the connector includes a first A connection portion and a second connection portion, the first connection portion electrically connects the feeding point to the housing, and the second connection portion electrically connects the ground point to the housing. The antenna module according to item 1 of the patent application scope, wherein the isolation portion is made of an insulating material. The antenna module according to item 1 of the scope of the patent application, wherein the first connection portion is one of a data line, a metal elastic piece, and a metal screw, and the second connection portion is a data line, a metal elastic piece, and a metal screw. . A wearable electronic device is improved in that the wearable electronic device includes a dial, a case, a substrate, and a partition. The dial has a receiving space, and the substrate is received in the receiving space. The dial is made of conductive material, the case is disposed on the outer peripheral wall of the dial, and the case is spaced from the dial, and further between the case and the dial A gap is formed between the watchcase and the dial to isolate the watch case from the dial, the substrate feeds current to the watch case and provides ground, and the watch case is used for transmitting and receiving wireless signals. Signal, a feed point and a ground point are provided on the substrate, the feed point is used to feed current to the watch case, the ground point is used to provide ground for the watch case, and the antenna module also Including a connecting member, the connecting member includes a first connecting portion and a second connecting portion, the first connecting portion electrically connects the feeding point to the watch case, and the second connecting portion connects the ground point It is electrically connected to the watch case. The wearable electronic device according to item 4 of the patent application scope, wherein the isolation portion is made of an insulating material. The wearable electronic device according to item 4 of the scope of patent application, wherein the first connection portion is one of a data line, a metal spring piece, and a metal screw, and the second connection portion is a data line, a metal spring piece, and a metal screw. One.