CN102509878B - Electronic device with structure for improving performance of antenna - Google Patents

Abstract

The invention discloses an electronic device with a structure for improving the performance of an antenna. The electronic device comprises a bottom shell, a metal backboard, a plurality of metal fixing strips and three blocky conductive patches. Two of the three blocky conductive patches are positioned at the first edge of the metal backboard, and electrically contact the metal backboard and metal fixing strips corresponding to the first edge of the metal backboard; the third of the three blocky conductive patches is positioned at a second edge symmetrical with the first edge of the metal backboard, and electrically contacts the metal backboard and metal fixing strips corresponding to the second edge; therefore, the three blocky conductive patches form three asymmetrical electric contact points between the metal backboard and the metal fixing strips. According to the electronic device, the three blocky conductive patches damage surface current between the metal backboard and the metal fixing strips in start-up or a call, thereby decreasing electromagnetic radiation.

Description

Electronic device with structure for improving antenna performance

technical field

The invention relates to an electronic device, in particular to an electronic device with a structure for improving antenna performance.

Background technique

As we all know, electronic devices such as mobile phones have display screens such as liquid crystal display screens and LED display screens. The cross-sectional view of an existing electronic device 1 ′ as shown in FIG. 1 shows the components on the bottom case 2 of the electronic device 1 ′. In the existing electronic device 1', the display screens (not shown in the figure) usually have a metal back plate 10 attached behind the display screen to protect the display screen. Usually, the bottom shell of the existing electronic device 2 is also provided with a plurality of metal fixing strips 20 , three of which are parallel to one side of the electronic device 1 ′ to form a frame-like structure, thereby defining the metal backplane 10 . At the same time, the metal fixing strips 20 have ring-shaped protrusions 201 for cooperating with the structure on the upper case (not shown in the figure) of the electronic device 1 ′, so as to fix the upper case and the bottom case 2 of the electronic device together. However, in the prior art, these metal fixing strips 20 are in surface contact with the metal backplane 10, and surface currents will be generated when the electronic device is turned on or talking, so that the ring-shaped protrusions 201 of the metal fixing strips 20 It will generate a magnetic field, increase the Specific Absorption Rate (SAR), and increase the intensity of electromagnetic radiation to the human body. At the same time, since there will inevitably be a gap between the metal fixing strip 20 and the metal back plate 10, it is easy to generate Antenna noise greatly affects antenna performance.

Contents of the invention

The invention provides an electronic device with a structure for improving the performance of the antenna, which can reduce the specific absorption rate of the antenna and reduce the noise of the antenna.

An electronic device with a structure for improving antenna performance, comprising a bottom case, a metal back plate, and a metal fixing strip, the metal back plate is rectangular, and the number of the metal fixing bars is arranged on the bottom case. One side of the metal backplane is parallel to form a frame-like structure, thereby defining the metal backplane, so that the three metal fixing strips are respectively parallel to one side of the metal backplane. It is characterized in that the electronic device with a structure for improving antenna performance Including three block-shaped conductive patches, two of the three block-shaped conductive patches are located on the first side of the metal backplane, corresponding to the metal backplane and the first side of the metal backplane The metal fixing strips are in electrical contact with each other, and the other one is located on the second side symmetrical to the first side of the metal backplane, and is in electrical contact with the metal backplane and the metal fixing strip corresponding to the second side. Thus, the three block-shaped conductive patches form three asymmetrical electrical contact points between the metal backplane and the metal fixing strip.

The electronic device also includes a strip-shaped conductive patch, the length of the strip-shaped conductive patch is consistent with the length of the third side of the metal backplane, and is arranged on the metal backplane along the length direction of the third side of the metal backplane. above, are in electrical contact with the third side of the metal backplane and the metal fixing strip corresponding to the third side, so that the metal fixing strip corresponding to the third side of the metal backplane is in full electrical contact with the metal backplane .

The electronic device capable of improving the structure of the antenna performance of the present invention can reduce the specific absorption rate of the antenna, that is, reduce the electromagnetic radiation, and reduce the noise of the antenna by adding a simple structure.

Description of drawings

FIG. 1 is a schematic diagram of components on a bottom case of an electronic device in the prior art.

FIG. 2 is a schematic diagram of components on the bottom case of the electronic device with improved antenna performance according to the first embodiment of the present invention.

Description of main component symbols

electronic device 1,1' Bottom case 2 metal backplane 10 metal fixing bar 20 Block conductive patch 30 Strip-shaped conductive patch 40 ring protrusion 201 first side 101 second side 102 third side 103

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

Please refer to FIG. 2 , an electronic device 1 with a structure for improving antenna performance (hereinafter referred to as: electronic device 1 ) includes a bottom case 2 , a metal back plate 10 , and a metal fixing bar 20 . As described in the background technology, wherein, the metal back plate is rectangular, the metal fixing strip 20 is arranged on the bottom case 2, and the number of the metal fixing strips 20 is three, each of which is parallel to one side of the electronic device 1 to form a The frame-like structure defines the metal backplane 10 , while the three metal fixing strips 20 are respectively parallel to and in contact with the first side 101 , the second side 102 and the third side 103 of the metal backplane 10 . At the same time, the metal fixing strips 20 have annular protrusions 201 for cooperating with structures on the upper case (not shown in the figure) of the electronic device 1 to fix the upper case and the bottom case 2 of the electronic device together. In this embodiment, compared with the prior art, the electronic device 1 further includes three block-shaped conductive patches 30 . Two of the three block-shaped conductive patches 30 are located on the first side 101 of the metal backplane 10, and are in electrical contact with the metal backplane 10 and the metal fixing strip 20 corresponding to the first side of the metal backplane, The other is located on the second side 102 of the metal backplane 10 which is symmetrical to the first side, and is in electrical contact with the metal backplane 10 and the metal fixing strip 20 corresponding to the second side 102 . Therefore, the three block-shaped conductive patches 30 form three asymmetrical electrical contact points between the metal backplane 10 and the metal fixing strip 20 , thereby breaking the surface contact between the metal backplane 10 and the metal fixing strip 20 . When the electronic device 1 is turned on or talking, the surface current generated between the metal backplane 10 and the metal fixing strip 20 is disturbed, so that the magnetic fields generated by the ring-shaped protrusions 201 on the metal fixing strip 20 cancel or weaken each other, reducing the specificity of the antenna. Absorption is electromagnetic radiation. Wherein, the three block-shaped conductive patches 30 can be in the shape of a square, a circle, etc., and their size is significantly smaller than the length of the first side 101 or the second side 102 of the metal backplane 10 .

The electronic device 1 also includes a strip-shaped conductive patch 40, the length of the strip-shaped conductive patch 40 is consistent with the length of the third side 103 of the metal backplane 10, along the length direction of the third side 103 of the metal backplane 10 It is arranged on the metal backplane 10, and is in electrical contact with the third side 103 of the metal backplane 10 and the metal fixing bar 20 corresponding to the third side and forms a line contact, so that the metal backplane 10 is third The metal fixing bar 20 corresponding to the side 103 is in complete electrical contact, which reduces the gap between the metal backplane 10 and the metal fixing bar 20 , and reduces the noise that interferes with the antenna.

The first side 101 and the second side 102 of the metal backplane 10 shown in FIG. 1 are the long sides of the metal backplane 10 , and the third side 103 is the narrow side of the metal backplane 10 . Obviously, the first side 101 and the second side 102 can be the narrow side of the metal backplane 10, the third side 103 can be the long side of the metal backplane 10, and the three metal fixing strips 20 are always connected with the three sides. Corresponds to a parallel and contact setting.

Wherein, the electronic device is an electronic device with a communication function and a display screen, such as a mobile phone and a PDA (personal digital assistant terminal). The block-shaped conductive patch 30 and the strip-shaped conductive patch 40 are conductive sheets such as copper foil and aluminum foil.

Therefore, in the present invention, the electronic device 1 can effectively reduce the specific absorption rate and reduce the interference to the antenna by arranging the conductive patch structures, thereby improving the performance of the antenna.

Claims (6)

1. An electronic device with a structure for improving antenna performance, comprising a bottom case, a metal back plate, and a metal fixing strip. The metal back plate is rectangular, and the metal fixing strips are arranged on the bottom case. One side of the device is parallel to form a frame-like structure, thereby defining the metal backplane and the three metal fixing strips are respectively parallel to and in contact with the first side, second side and third side of the metal backplane, characterized in that , the electronic device with a structure for improving antenna performance further includes three block-shaped conductive patches, two of which are located on the first side of the metal backplane, and the metal backplane and the metal backplane The metal fixing strip corresponding to the first side of the metal backplane is in electrical contact, and the other is located on the second side of the metal backplane that is symmetrical to the first side, and the metal fixing strip corresponding to the metal backplane and the second side The three block-shaped conductive patches form three asymmetrical electrical contact points between the metal backplane and the metal fixing strip. the 2. The electronic device with a structure for improving antenna performance as claimed in claim 1, wherein the electronic device further comprises a strip-shaped conductive patch, the length of the strip-shaped conductive patch is the same as that of the metal backplate The length of the third side of the metal back plate is the same, and it is arranged on the metal back plate along the length direction of the third side of the metal back plate, and is in electrical contact with the third side of the metal back plate and the metal fixing strip corresponding to the third side, so that The metal fixing bar corresponding to the third side of the metal backboard is completely in electrical contact with the metal backboard. the 3. The electronic device with a structure for improving antenna performance as claimed in claim 2, wherein the electronic device is a mobile phone or a PDA. the 4 . The electronic device with a structure for improving antenna performance according to claim 2 , wherein the block-shaped conductive patch and the strip-shaped conductive patch are conductive sheets including copper foil and aluminum foil. the 5. The electronic device with a structure for improving antenna performance according to claim 1, wherein the three block-shaped conductive patches are square or circular, and the size is significantly smaller than the first side or the second side of the metal backplane. The length of the two sides. the 6. The electronic device with a structure for improving antenna performance as claimed in claim 2, wherein the length of the strip-shaped conductive patch is consistent with the length of the third side of the metal backplane. the