TWM457308U - Antenna structure - Google Patents

Description

Antenna structure

This creation relates to an antenna, and more particularly to an antenna structure having a specific absorption ratio (SAR) value of low electromagnetic energy.

With the continuous improvement of technology, many mobile electronic devices have been developed, such as tablet PCs that are currently on the market. Because the tablet is light and thin, and easy to carry, it is widely used by various industries and units.

When the product is to be purchased by the relevant unit, the product must undergo rigorous inspection, including falling, shockproof, high and low temperature operation, EMI/EMC interference, etc. in the inspection items. A 26-point line drop test of the product was carried out. Since the product is in the corner of the product, the corners of the product are the most vulnerable parts. Therefore, many products cannot be tested by the fall regulations. Therefore, in order to pass the inspection, the manufacturer often uses the housing of the product. The corners of the part are added with reinforcing metal blocks or metal parts. After the reinforcing metal blocks or metal parts are reinforced on the inner corners of the casing, the mechanical strength of the machine itself can be increased to meet the specification of falling.

Although the addition of reinforcing metal blocks or metal parts to the inner corners of the product's casing can be verified by falling regulations, the metal block or metal device will make the day The line SAR value is increased and cannot be detected by the FCC SAR regulations.

Therefore, the main purpose of this creation is to solve the above-mentioned shortcomings. This creation changes the direction of the end or open end of the radiator of the antenna, not only allows the metal block to have the original reinforcing effect, but also achieves a low SAR value and reduces the antenna. Radiation damage to the human body.

For the purpose of the above, the present invention provides an antenna structure, comprising: a mobile electronic device having a housing having at least one metal block therein; and an antenna mounted in the accommodating space Having a radiator having an open end and a signal feed point; wherein the open end of the antenna faces the metal block, and the signal feeds the current path to the reinforcing metal block It is about a quarter of the wavelength of the communication band.

The housing has an accommodating space therein, and the accommodating space has a plurality of corners, and the metal block is located at the corners.

The accommodating space has a mounting area for mounting the antenna.

Wherein, the metal block is located at a corner beside the antenna of the accommodating space.

Wherein, the radiation system is formed by connecting a plurality of metal segments.

Wherein, the radiator further comprises an end, the end being the open end of the radiator.

Wherein, the radiator further comprises a front end.

The grounding body further includes a grounding body electrically connected to the front end of the radiator.

1‧‧‧Mobile electronic devices

11‧‧‧Shell

12‧‧‧ accommodating space

121‧‧‧Installation area

122‧‧‧ corner

13‧‧‧Circuit board

14‧‧‧LCD panel

15‧‧‧Edge

16‧‧‧metal block

2‧‧‧Antenna

21‧‧‧ radiator

211‧‧‧Metal segments

212‧‧‧ front end

End of 213‧‧‧

214‧‧‧ Signal Feeding Point

22‧‧‧ Grounding body

3‧‧‧ Current path

The first picture is a schematic diagram of the combination of the antenna and the mobile electronic device of the present invention.

The second figure is a front view of the combination of the antenna of the present creation and the mobile electronic device.

The third figure is a partial enlarged view of the second figure.

The fourth figure is a schematic diagram of the current path of the antenna of the present invention installed between the mobile electronic device and the metal block.

The technical content and detailed description of this creation are as follows:

Please refer to the first figure for a combination of the antenna and mobile electronic device of this creation. As shown in the figure: the low SAR antenna structure of the present invention comprises: a mobile electronic device 1 and an antenna 2.

The mobile electronic device 1 has a housing 11 therein. The housing 11 has an accommodating space 12 for mounting an associated component of the mobile electronic device 1, such as a circuit board 13. And the liquid crystal display panel 14, or a lens (not shown) or other components. When the circuit board 13 and the liquid crystal display panel 14 are mounted in the accommodating space 12 in a stacked manner, the circuit board 13 and the liquid crystal The display panel 14 forms a mounting area 121 with the edge portion 15 of the housing 11. In addition, the accommodating space 12 has four corners 122, each of which has a metal block 16 (or the metal block 16 is located at a corner beside the antenna 2), and the metal block 16 is used to reinforce the housing. The strength of the corners 122 of 11. In the figure, the mobile electronic device 1 is a tablet computer or a smart phone.

The antenna 2 is mounted on the metal block 16 side of the mounting area 121 and reinforced on the upper right side. The antenna 2 has a radiator 21 and a grounding body 22. The radiator 21 is formed by joining a plurality of metal wire segments 211. The radiation body 21 has a front end 212, a distal end 213 and a signal feeding point 214. The front end 212 is electrically connected to the grounding body 22, and the end 213 forms an open end of the antenna 2. The signal feeding point The 214 system is electrically connected to a copper axis between the copper shaft cable (not shown), and the grounding body 22 is electrically connected to the ground portion of the coaxial cable, and then passes through the other end of the ground portion of the copper shaft cable. The casing 11 is connected to the ground of the casing 11 of the mobile electronic device 1. In the figure, the grounding body 22, and the front end 212 and the plurality of metal line segments 211 of the antenna 2 may or may not be added as required by the characteristics of the antenna 2.

Please refer to the second and third figures, which are the combined front view of the antenna and the mobile electronic device of the present invention and a partial enlarged view of the second figure. As shown in the figure, when the mounting area 121 of the antenna 2 mounted in the housing 11 is adjacent to the upper right metal block 16, the grounding body 22 of the antenna 2 and the casing of the mobile electronic device 1 11 grounding (connection method is connected by means of electrical conduction, such as copper foil sticker or conductive foam, etc.), or connected to the metal or PCB grounding under the liquid crystal display panel 14 of the casing 11 or other groundable place link. The antenna 2 The end 213 of the radiator 21 faces the upper right metal block 16, and the signal feed point 214 to the upper right metal block 16 has a d distance which is approximately a quarter wavelength of the communication band.

When the antenna 2 is mounted on one side of the upper right metal block 16, the end 213 of the radiator 21 of the antenna 2 faces the upper right metal block 16, and the signal feeds the point 214 to the upper right metal block 16. Forming a mounting position relationship of approximately d-distance using a quarter-wavelength of the communication band, which can be applied to systems of 2G, 3G, and 4G communication bands (WWAN, LTE), and can reduce the SAR value to reduce the antenna 2 Radiation damage to the human body.

Please refer to the fourth figure, which is a schematic diagram of the current path of the antenna of the present invention installed between the mobile electronic device and the metal block. As shown in the figure, after the grounding body 22 and the metal block 16 of the antenna 2 of the present invention are electrically connected to the housing 11 of the mobile electronic device 1, the open end of the antenna 2 (toward the metal block 16), The signal feed point 214 on the radiator 21 of the antenna 2 to the current path 3 of the metal block 16 is a quarter wavelength of the application communication band.

Therefore, the current path 3 at the end 213 of the antenna 2 toward the corner metal block 16 and the signal feed point 214 on the radiator 21 to the metal block 16 is approximately one quarter of the wavelength of the communication band. When used, the SAR value can be reduced to reduce the damage of the antenna 2 radiation to the human body.

The end of the radiator of the present antenna (open end) is measured outward (toward the metal line) and inward (not toward the metal block) to measure the SAR value of the top of the mobile electronic device (TOP); The second picture shows. When used in the creation of the present WCDMA communication system, power of 24 dBm conduction, the frequency at 1850MH _Z, at the end of the radiator 21 of the antenna 2 213 inwardly (toward the end of the metal block 213 is not 16), the movement is measured to The SAR value above the electronic device 1 is 4.76; when the end 213 of the radiator 21 of the antenna 2 faces outward (the end 213 faces the metal block 16), the SAR value above the mobile electronic device 1 is measured to be 2.99. The SAR value decreased by 37.18%.

When the frequency 1880MH _Z, at the end of 21 213 inwardly (toward the terminal 213 is not strong metal block 16), the measured radiation over antenna 2 to the mobile electronic device 1 is 5.08 SAR; antenna 2 When the end 213 of the radiator 21 faces outward (the end 213 faces the metal block 16), the SAR value above the mobile electronic device 1 is measured to be 2.97, and the SAR value is decreased by 41.53%.

When the frequency 1910MH _Z, at the end of the radiator 21 of the antenna 2 213 inwardly (toward the end of the metal block 213 is not 16), measured to the top of the mobile electronic device 1 is 5.5 SAR; antenna 2 When the end 213 of the radiator 21 faces outward (the end 213 faces the metal block 16), the SAR value above the mobile electronic device 1 is measured to be 3.4, and the SAR value is decreased by 38.18%.

The end of the radiator (open end) of the present antenna is measured outward (toward the metal block) and inward (not toward the metal block) to measure the SAR value of the back of the mobile electronic device (BACK); The second picture shows. When used in the creation of the present WCDMA communication system, conducting power 24 dBm, the frequency at 1850MH _Z, at the end of the radiator 21 of the antenna 2 213 inwardly (toward the end of the metal block 213 is not 16), the measured amount of the The SAR value of the back surface of the mobile electronic device 1 is 2.14; when the end 213 of the radiator 21 of the antenna 2 faces outward (the end 213 faces the metal block 16), the SAR value of the back surface of the mobile electronic device 1 is measured to be 1.82. The SAR value dropped by 14.95%.

When the frequency 1880MH _Z, at the end of the radiator 21 of the antenna 2 213 inwardly (toward the end of the metal block 213 is not 16), as measured to the rear surface of the mobile electronic device 1 SAR is 2.26; in the antenna 2 When the end 213 of the radiator 21 faces outward (the end 213 faces the metal block 16), the SAR value of the back surface of the mobile electronic device 1 is measured to be 1.87, and the SAR value is decreased by 17.25%.

When the frequency 1910MH _Z, at the end of the radiator 21 of the antenna 2 213 inwardly (toward the end of the metal block 213 is not 16), as measured to the rear surface of the mobile electronic device 1 is 2.4 SAR; antenna 2 When the end 213 of the radiator 21 faces outward (the end 213 faces the metal block 16), the SAR value of the back surface of the mobile electronic device 1 is measured to be 1.87, and the SAR value is decreased by 22.08%.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, the equal changes and modifications made by the patent application scope of this creation are covered by the scope of the creation patent.

1‧‧‧Mobile electronic devices

11‧‧‧Shell

12‧‧‧ accommodating space

122‧‧‧ corner

13‧‧‧Circuit board

14‧‧‧LCD panel

15‧‧‧Edge

16‧‧‧metal block

2‧‧‧Antenna

21‧‧‧ radiator

211‧‧‧Metal segments

212‧‧‧ front end

End of 213‧‧‧

214‧‧‧ Signal Feeding Point

22‧‧‧ Grounding body

Claims (8)

An antenna structure comprising: a mobile electronic device having a housing having at least one metal block therein; an antenna mounted in the housing and having a radiator thereon, the radiator The upper end has an open end and a signal feed point; wherein the open end of the antenna faces the metal block, and the current path of the signal feed point to the reinforcing metal block is about a quarter wavelength of the communication band. The antenna structure of claim 1, wherein the housing has an accommodating space, and the accommodating space has a plurality of corners, and the metal block is located at the corners. The antenna structure of claim 2, wherein the accommodating space has a mounting area in which the antenna is mounted. The antenna structure of claim 3, wherein the metal block is located at a corner beside the antenna of the accommodating space. The antenna structure of claim 4, wherein the radiation system is formed by joining a plurality of metal segments. The antenna structure of claim 5, wherein the radiator further comprises an end, the end being the open end of the radiator. The antenna structure of claim 6, wherein the radiator further comprises a front end. The antenna structure of claim 7, wherein the antenna structure is further included a grounding body electrically connected to a front end of the radiator.