TWI737700B - Antenna device for electronic equipment and electronic equipment - Google Patents

Abstract

The present invention discloses an antenna device for electronic equipment, which includes: a slot antenna formed by forming a through slot in the housing of the electronic device; a printed circuit board, the printed circuit board having a The first surface and the second surface on the opposite side, the first surface is provided with an antenna circuit for a slot antenna, the antenna circuit is electrically connected to the main circuit of the electronic device by a conductive cable, and the second surface of the printed circuit board It is joined to the surface of the housing of the electronic device and covers a part of the slot of the slot antenna. The second surface of the printed circuit board is composed of a conductive first area and a non-conductive second area. The present invention also discloses an electronic device including the antenna device.

Description

Antenna device for electronic equipment and electronic equipment

The present invention relates to an antenna device and electronic equipment for electronic equipment. More specifically, the present invention relates to an antenna device that can be used in electronic devices of various sizes and/or models.

Electronic devices, especially portable electronic devices, such as notebook computers, cellular phones, etc., usually include antennas to communicate with the outside world. In order to ensure portability, embedded antennas have gradually become a trend. As a built-in antenna, slot antennas are widely used in electronic devices. The back side of the circuit board (PCB) of the traditional slot antenna is only provided with non-conductive glue, and the non-conductive glue is used to adhere to the housing of the electronic device. Generally, the size and width of the slots for forming slot antennas on electronic devices of different sizes and/or models are different, for example, the length and width of the slots on the shells of 13-inch and 15-inch notebook computers Since the length and width of the slot directly affect the performance of the formed slot antenna, in order to achieve the same antenna performance, it is necessary to design different slot antennas for electronic devices of different sizes and/or models. Reduce the adaptability of the antenna device and increase the product cost. Moreover, once the designed slot antenna is applied to each electronic device, the antenna performance cannot be adjusted without changing the appearance of the electronic device, which reduces the adaptability of the electronic device. Therefore, there is a need for an improved antenna device for such electronic equipment.

In order to solve at least one aspect of the above-mentioned problems, the present invention proposes an antenna device for electronic equipment, which can be applied to electronic equipment of different sizes and/or models, and can be used without changing the appearance of the electronic equipment. Freely adjust the antenna efficiency. In addition, the present invention also provides an electronic device including the antenna device. The electronic device may be a portable device with communication function such as a notebook computer, a cellular phone, a tablet computer, and the like. According to one aspect of the present invention, there is provided an antenna device for an electronic device, which includes: a slot antenna formed by forming a through slot in a housing of the electronic device; a printed circuit board, The printed circuit board has a first surface and a second surface on opposite sides. An antenna circuit for a slot antenna is provided on the first surface. The antenna circuit is electrically connected to the main circuit of the electronic device through a conductive cable. The second surface of the circuit board is joined to the surface of the housing of the electronic device and covers a part of the slot of the slot antenna. The second surface of the printed circuit board is composed of a conductive first area and a non-conductive second area . Wherein, the length and/or width of the slot antenna can be adjusted by adjusting the area of the conductive first region, that is, the length and/or width of the slot antenna is changed from the original length and/or of the slot The width and the area of the conductive first region are jointly determined. After the original length of the slot is determined, the area of the conductive first region can be adjusted separately to obtain the desired length and/or width of the slot antenna. Further, the area of the conductive first region is adjusted so that the length of the slot excluding the length of the conductive first region is equal to a quarter wavelength at the operating frequency of the antenna device of the electronic device. Wherein, the area of the conductive first region varies according to the size of the electronic device. Wherein, the area of the conductive first region changes according to the original length of the slot. Preferably, the area of the conductive first region is adjusted so that the length of the slot excluding being covered by the conductive first region is equal to 31.25 mm or 15 mm. Wherein, conductive glue, copper foil or conductive foam is arranged on the conductive first area. According to another aspect of the present invention, there is also provided an electronic device including the antenna device as described above. Wherein, the electronic device can be a notebook computer of different sizes and/or models. Wherein, the electronic device can be a cellular phone or tablet computer of different sizes and/or models. The antenna device according to the above aspect or embodiment can be applied to electronic devices of different sizes and/or models, and the antenna performance can be adjusted freely without changing the appearance of the electronic device. From the following description of the present invention with reference to the accompanying drawings, other objects and advantages of the present invention will be apparent and can help a comprehensive understanding of the present invention.

The technical solutions of the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention, and should not be construed as a limitation to the present invention. In addition, in the following detailed description, for the convenience of explanation, many specific details are described to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is obvious that one or more embodiments can be implemented without these specific details. In other cases, well-known structures and devices are shown in the form of illustrations to simplify the drawings. According to one aspect of the general technical concept of the present invention, there is provided an antenna device for an electronic device, which includes a slot antenna formed by forming a through slot in the housing of the electronic device; A printed circuit board, the printed circuit board has a first surface and a second surface on opposite sides, the first surface is provided with an antenna circuit for a slot antenna, the antenna circuit is electrically connected to the main electronic device through a conductive cable The second surface of the printed circuit board is joined to the surface of the housing of the electronic device and covers a part of the slot of the slot antenna, wherein the second surface of the printed circuit board is composed of a conductive first area and a non-conductive area. The conductive second area is composed. According to another aspect of the general technical concept of the present invention, an electronic device including the antenna device is also provided. FIG. 1 is a three-dimensional schematic diagram of an electronic device according to an embodiment of the present invention. The electronic device includes an upper housing 100, which is usually made of a metal material. As shown in FIG. 1, a slot 10 penetrating the thickness of the upper shell is provided at a position on the outer side of the upper shell 100 (toward the user side), and the slot 10 is used to form a slot antenna. It should be understood that the slot 10 can also be formed in other parts of the casing of the notebook computer, as long as it is convenient for it to realize the antenna function. FIG. 2 further shows a schematic diagram of a housing 100 including a printed circuit board (PCB) 12. As shown in FIG. 2, the printed circuit board 12 is joined to the upper housing 100 and covers a part of the slot hole 10. The printed circuit board 12 includes a first surface 14 and a second surface 16 on opposite sides. The first surface 14 can be seen in FIG. 2. Although not shown, it should be understood that the first surface 14 is provided with the antenna required by the antenna device Circuit. The printed circuit board 12 is joined (for example, glued) to the upper housing 100 by the second surface 16, and the second surface 16 will be further described below. In this way, communication can be performed by the slot antenna formed by the slot 10, and the signal transmitted by the slot antenna can be transmitted to the master of the electronic device through the antenna circuit on the printed circuit board 12 and through the cable (described below). Circuit. It can be understood that the size of the slot 10, such as the length and width, will greatly affect the performance of the slot antenna. FIG. 3 shows a schematic bottom view of the printed circuit board 12, which shows the second surface 16 in detail. The second surface 16 is composed of a conductive first region 18 and a non-conductive second region 20. In the embodiment shown in FIG. 3, the conductive first region 18 includes conductive glue, and the non-conductive second region 20 includes non-conductive glue. In this way, the printed circuit board 12 is adhered to the upper casing 100 by the conductive glue and the non-conductive glue. In other embodiments, the conductive first region 18 may also include other conductive materials, such as copper foil, conductive foam, and the like. In order to further show the positional relationship between the printed circuit board 12 and the upper housing 100 with the slot 10, FIG. 4 shows an exploded view of the printed circuit board 12 and the upper housing 100 with the slot 10, and the printed circuit is also shown in the figure. The first surface 14 and the second surface 16 of the board 12. As shown in the figure, when the printed circuit board 12 covers a part of the slot 10, the conductive first area 18 on the second surface 16 will also cover a part of the slot 10. In this way, according to the Faraday cage effect, it is used for the slot 10 The size of the slot of the hole antenna is changed, for example, the length is shortened, thereby changing the antenna efficiency of the slot antenna. In other words, the size of the slot of the slot antenna can be changed by changing the area of the conductive first region 18 on the second surface 16, for example, by changing its length and/or width, thereby changing the antenna efficiency. In a preferred embodiment, the area of the conductive first region 18 is adjusted so that the length of the slot 10 excluding the conductive first region 18 is equal to one-fourth of the operating frequency of the antenna device of the electronic device wavelength. In addition, the area of the conductive first region 18 can be changed according to the size of the electronic device, and/or according to the length of the slot 10. For example, for a 15-inch notebook computer, the initial length of the slot 10 opened in the upper case 100 is 50 mm, and the antenna device of the notebook computer usually operates at 2.4 GHz, then a quarter of the operating frequency A wavelength is equal to 31.25 mm. At this time, the area of the conductive first region 18 can be adjusted so that the conductive first region 18 covers the length of 18.75 mm of the slot 10 on the left side shown in FIG. 4, so that the slot 10 The length except covered by the conductive first region 18 is equal to 31.25 mm, so as to reach the resonance point. For a 13-inch notebook computer, the initial length of the slot 10 opened in the upper casing 100 is 40 mm. At this time, only the area of the conductive first region 18 needs to be adjusted so that the conductive first region 18 covers the slot The length of the hole 10 on the left side shown in FIG. 4 is 8.75 mm, so that the length of the slot 10 excluding the first conductive area 18 is still equal to 31.25 mm, thus reaching the resonance point. If the common operating frequency of the antenna device of the notebook computer is 5 GHz, and the quarter wavelength at the operating frequency is equal to 15 mm, then for the 15-inch and 13-inch notebook computers, the first conductive area can be adjusted separately The area of 18 is such that the conductive first region 18 covers the 35 mm and 25 mm lengths of the slot 10 on the left side shown in FIG. 4, so that the slot 10 is covered by the conductive first region 18 The length is equal to 15 mm to reach the resonance point. By adjusting the area of the conductive first region 18, the size of the slot 10 can be adjusted. After the IF test, it is shown that the performance of the adjusted slot antenna is good. Therefore, the antenna device according to this embodiment can be applied to electronic devices of different sizes and/or models, thereby greatly improving its applicability and reducing product design and production costs. Further, the antenna device can freely and flexibly adjust the antenna performance by adjusting the area of the conductive first area without changing the external shape of the electronic device, thereby further improving the applicability of the antenna device. FIG. 5 further shows the connection relationship of the antenna device. As shown in FIG. 5, the antenna device 1 is electrically connected to the main circuit (not shown) of the electronic device through the conductive cable 22, thereby transmitting the signal transmitted by the antenna device 1 to the electronic device The main circuit. According to another aspect of the general technical concept of the present invention, there is also provided an electronic device including the antenna device according to any one of the above-mentioned embodiments. The electronic device can be a notebook computer of different sizes and/or models, such as a 13-inch, 15-inch, or 17-inch notebook. The electronic device can also be a cellular phone or tablet computer of different sizes and/or models. Although the present invention is described with reference to the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to illustrate the implementation of the present invention, and should not be understood as a limitation of the present invention. In order to clearly show the details of the various components, the various components in the drawings are not drawn to scale, so the proportions of the various components in the drawings should not be regarded as a limitation. Although some embodiments of the general concept of the present invention have been shown and described, those skilled in the art will understand that changes can be made to these embodiments without departing from the principles and spirit of the general concept of the present invention. The scope of the invention is limited by the scope of the patent application and their equivalents.

10‧‧‧Slot 12‧‧‧Printed circuit board 14‧‧‧First surface 16‧‧‧Second surface 18‧‧‧Conductive first area 20‧‧‧Non-conducting second area 22‧‧‧ Leading cable 100‧‧‧Upper shell

Fig. 1 is a three-dimensional schematic diagram of an electronic device according to an embodiment of the present invention; Fig. 2 is a front view of an upper housing of an electronic device according to an embodiment of the present invention showing a circuit board covering a part of a slot; A schematic diagram of the second surface of the circuit board including the conductive first area and the non-conductive second area according to the embodiment of the present invention; FIG. 4 is a diagram showing the first surface and the second surface of the circuit board according to the embodiment of the present invention And a schematic diagram of the positional relationship of the slots; FIG. 5 is a schematic diagram showing the connection cable of the antenna device according to the embodiment of the present invention.

10‧‧‧Slot

12‧‧‧Printed Circuit Board

14‧‧‧First surface

16‧‧‧Second Surface

18‧‧‧The first conductive area

20‧‧‧The second non-conductive area

100‧‧‧Upper shell

Claims (10)

An antenna device for electronic equipment, comprising: a slot antenna formed by forming a through slot in the housing of the electronic device; a printed circuit board, the printed circuit board having an opposite side The first surface and the second surface, the first surface is provided with an antenna circuit for a slot antenna, the antenna circuit is electrically connected to the main circuit of the electronic device by a conductive cable, and the second surface of the printed circuit board is connected to the electronic On the surface of the housing of the device and covering a part of the slot of the slot antenna, it is characterized in that the second surface of the printed circuit board is composed of a conductive first area and a non-conductive second area, and the conductive The first area covers a part of the slot of the slot antenna. The antenna device of claim 1, wherein the length and/or width of the slot antenna can be adjusted by adjusting the area of the conductive first region. Such as the antenna device of claim 2, wherein the area of the conductive first region is adjusted so that the length of the slot, except for the first conductive region, is equal to four times the operating frequency of the antenna device of the electronic device. One-wavelength. Such as the antenna device of claim 2, wherein the area of the conductive first area varies according to the size of the electronic device. Such as the antenna device of claim 2, wherein the area of the conductive first region is based on the size of the slot The original length varies. Such as the antenna device of claim 2, wherein the area of the conductive first area is adjusted so that the length of the slot excluding the first area covered by the conductive is equal to 31.25 mm or 15 mm. According to the antenna device of any one of claims 1 to 6, wherein the conductive first area is provided with conductive glue, copper foil or conductive foam. An electronic device, characterized in that it comprises the antenna device according to any one of the preceding claims. Such as the electronic device of claim 8, wherein the electronic device is a notebook computer of different sizes and/or models. Such as the electronic device of claim 8, wherein the electronic device is a cellular phone or tablet computer of different sizes and/or models.

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