TW201814958A - Antenna structure of metal communication device which can suppress the interference of specific absorption ratio (SAR) of the electromagnetic wave in the product and the interference of the metal elements in the communication device in the antenna radiation - Google Patents

Abstract

An antenna structure of a metal communication device is disposed on one side of a substrate having an antenna pattern formed on the surface thereof and connected with a metal foil. The metal foil is composed of a vertical retaining wall and a flat plate, wherein the vertical retaining wall is between the side edge of the substrate and the flat plate, and one end of the flat plate is connected to the metal housing of the communication device. Thus, the antenna can conduct current to the metal housing via the coupling mode to suppress the interference of specific absorption ratio (SAR) of the electromagnetic wave in the product. The vertical retaining wall can be used to suppress the interference of the metal elements behind the antenna in the antenna radiation. The antenna structure of the metal communication device further comprises a coaxial cable disposed below the substrate, and the antenna pattern on the surface thereof has a signal feeding end and a grounding end. The signal feeding end is connected with the coaxial wire cable so that the wireless signal is transmitted to the signal feeding end of the antenna and then the wireless signal is emitted via the antenna. The grounding end is connected with the metal foil so that the antenna can guide the current through the metal foil to the metal housing of the communication device, and the vertical retaining wall can be used to prevent the performance of the antenna from being interfered by the metal elements inside the communication device. The metal foil can be a copper foil having one end connected to the metal housing of the communication device to expand the current extending area of the antenna. The metal foil can also be a laser engraving sheet, an iron sheet or made of any material having a metal containing component.

Description

   Antenna structure of metal communication device   

The invention relates to an antenna structure of a metal communication device, and particularly to an antenna structure provided inside a notebook computer. A metal sheet is connected to one side of a substrate on which an antenna pattern is formed on the surface, and one end of the metal sheet is connected to the communication device. The metal case enables the antenna to direct current to the metal case to suppress the interference of electromagnetic wave absorption ratio (SAR) on the product, and the metal foil and the substrate are connected at one end with a facade retaining wall to suppress Interferer of the internal metal components of the communication device on the radiation performance of the antenna.

With the rapid development of communication equipment, communication devices such as mobile phones are becoming smaller and easier to carry with them. However, as the distance between the antenna and the user is getting closer and closer, the situation causing users to be harmed by electromagnetic waves is also relatively To increase, in order to reduce people's exposure to electromagnetic waves, there are specifications and limits for electromagnetic wave absorption ratio (Specific Absorption Rate, SAR).

The electromagnetic wave absorption ratio (Specific Absorption Rate, SAR) is established by the European standards body CENELEC, which is mainly used to simulate the state of normal use of a mobile phone and measure the electromagnetic waves generated at the maximum output power of a mobile phone. This value is W / Kg as The unit mainly calculates the value of 10 grams of human tissues and organs that receives 10 minutes of electromagnetic radiation. In recent years, the United States Federal Communications Commission FCC has successively established preliminary SAR test specifications for notebook computers' built-in antennas and wireless data cards to ensure that users are protected from electromagnetic waves.

For electronic products such as notebook computers, the antenna is mainly located on the upper cover. When the upper cover is opened, the antenna can perform wireless transmission and reception. However, as the casings of electronic products such as notebook computers are changed to metal casings, metal casings are prone to produce shielding effects when the antenna transmits signals, which affects the radiation characteristics of the antenna and also affects the SAR characteristics.

In view of the above problems of antennas of conventional notebook computers, the inventors have researched and improved ways to address these shortcomings, and the present invention has been produced through long-term research.

Therefore, the present invention aims to provide an antenna structure of a metal communication device, which enables a communication device with a metal case such as a notebook computer and a tablet computer. The antenna structure can suppress the interference of electromagnetic wave absorption ratio (SAR) on the product, and can also Suppress the interference of the internal metal components of the communication device on the radiation performance of the antenna.

According to the antenna structure of the metal communication device of the present invention, a metal sheet is connected to one side of the antenna substrate, and the metal sheet is connected to the metal case of the communication device, so that the antenna can guide the current to the metal case to achieve suppression. The interference of electromagnetic wave absorption ratio (SAR) on products is a secondary objective of the present invention.

According to the antenna structure of the metal communication device of the present invention, one end of the connection between the metal foil and the substrate is a façade retaining wall, so as to suppress the interference of the metal components inside the communication device on the antenna radiation performance, which is another object of the present invention. .

According to the antenna structure of the metal communication device of the present invention, the metal sheet is copper foil, and when one end is connected to the metal case of the communication device, the area of the antenna current extension can be enlarged, which is another object of the present invention.

As for the detailed structure, application principle, function and effect of the present invention, please refer to the following description with reference to the drawings for a complete understanding.

100‧‧‧ substrate

101‧‧‧ coaxial cable

200‧‧‧ antenna pattern

201‧‧‧ signal feed-in

202‧‧‧ Ground

300‧‧‧ metal foil

301‧‧‧ façade retaining wall

302‧‧‧ tablet

400‧‧‧F antenna

FIG. 1 is a schematic perspective view of a first embodiment of an antenna structure of a metal communication device according to the present invention.

Fig. 2 is a diagram showing a current distribution implemented at 2.4 GHz according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a current distribution implemented at 5 GHz in the first embodiment of the present invention.

FIG. 4 is a schematic perspective view of a second embodiment of an antenna structure of a metal communication device according to the present invention.

FIG. 5 is a diagram showing a current distribution implemented at 2.4 GHz according to a second embodiment of the present invention.

FIG. 6 is a diagram showing a current distribution implemented at 5 GHz according to a second embodiment of the present invention.

FIG. 7 is a graph of S parameters measured by a network analyzer on the antenna structure of the present invention.

The antenna structure of the metal communication device of the present invention, as shown in FIG. 1, is formed on the surface of a substrate 100 with an antenna pattern 200. One edge of the substrate 100 is connected to a metal sheet 300, which is made of copper. The foil is composed of a facade retaining wall 301 and a flat plate 302. One end of the facade retaining wall 301 is connected to the side edge of the substrate 100. One side of the flat plate 302 can be connected to a metal housing of a communication device (fig. (Not shown) connection. The metal sheet 300 can also be made of any metal-containing material, including laser engraving or iron sheet.

As shown, the antenna pattern 200 is a dipole antenna and includes a signal feeding terminal 201 and a ground terminal 202. The signal feed-in terminal 201 is connected to a coaxial wire 101 provided below the substrate 100. When the wireless signal is transmitted to the signal feed-in terminal 201, the antenna transmits the wireless signal, and the ground terminal 202 of the antenna is connected to the metal sheet 300. Connection, one end of the metal foil 300 is connected to the metal casing of the communication device; by this, the antenna can guide the current through the metal foil 300 to the metal casing of the communication device through the coupling method, so as to suppress the specific absorption ratio (SAR) Product interference, and its facade retaining wall 301 can be used to prevent the antenna performance from being interfered by metal components inside the communication device.

Figure 2 is the antenna structure of the metal communication device of the present invention. The dipole antenna of Figure 1 is used to implement the antenna current distribution diagram of 2.4GHz. Since the antenna clearly directs the current to the metal case of the communication device, SAR is worthwhile. To reduce, thus reducing interference with the product.

Figure 3 is the antenna structure of the metal communication device of the present invention. The dipole antenna of Figure 1 is used to implement a 5GHz antenna current distribution diagram. From this diagram, it can be clearly seen that the SAR value is reduced, which can reduce the effect on the product. interference.

Please refer to FIG. 4, which is a diagram of a second embodiment of the antenna structure of the metal communication device of the present invention. The antenna structure shown in the figure is also connected to a metal foil 300 on one edge of the substrate 100. A facade retaining wall 301 and a flat plate 302 are formed, one end of the facade retaining wall 301 is connected to a side edge of the substrate 100, and the flat plate 302 thereof can be connected to a metal casing (not shown) of the communication device. The difference is that the antenna pattern formed on the upper surface of the substrate 100 is an F antenna 400.

Fig. 5 is an antenna structure of the metal communication device of the present invention. The F antenna 400 of Fig. 4 is used to implement an antenna current distribution chart of 2.4 GHz. Since the antenna guides the current to the metal case of the communication device, the SAR is worth reducing. Can reduce interference with the product.

Fig. 6 is the antenna structure of the metal communication device of the present invention. The F antenna 400 of Fig. 4 is used to implement a 5 GHz antenna current distribution diagram. From this diagram, it can also clearly show that the SAR value is lower, and it can reduce the Interference.

Please refer to Figure 6, which is the S-parameter value measured by the network analyzer on the antenna structure of the present invention. As can be seen from the figure, the S ₁₁ port for measuring reflection loss and The reflection loss of S ₂₁ port can reach a very small value.

In summary, the antenna structure of the metal communication device of the present invention can indeed suppress the interference of SAR to the product and prevent the radiation performance of the antenna from being interfered by metal components, and it has not been used in public. It is a virtue to request a quasi-patent.

Those who need to be clear, the above are the preferred and specific embodiments of the present invention. If the changes made according to the concept of the present invention and the functional effects do not exceed the spirit covered by the description and illustration, Within the scope of the present invention, Chen Ming is here.

Claims (4)

    An antenna structure of a metal communication device is connected to one side of a substrate on the surface of which an antenna pattern is formed, and is connected to a metal sheet. The metal sheet is composed of a facade retaining wall and a flat plate, one end of the facade retaining wall and the substrate. Is connected to the side edge, and one end of the flat plate is connected to the metal case of the communication device.         According to the antenna structure of the metal communication device according to item 1 of the scope of the patent application, a coaxial wire is provided below the substrate, and the antenna pattern on the surface thereof has a signal feed-in terminal and a ground terminal, and the signal feed-in terminal and The coaxial wire is connected, so that the wireless signal is transmitted to the signal feeding end of the antenna, and then the wireless signal is emitted through the antenna. The ground end is connected to the metal foil, so that the antenna can guide the current through the metal foil to the metal shell of the communication device. Moreover, the facade retaining wall can be used to prevent the antenna performance from being interfered by metal elements inside the communication device.         The antenna structure of the metal communication device according to item 1 of the scope of patent application, wherein the metal foil is a copper foil.         For example, the antenna structure of the metal communication device described in item 1 of the scope of the patent application, wherein the metal sheet may also be any material containing a metal component, including laser engraving or an iron sheet.