Mobile terminal capable of balancing specific absorption rate and total radiated power and implementation method thereof

A technology for absorbing radiance and total radiated power, which is applied in the field of mobile terminals and implementations that balance absorbing radiance and total radiated power. The effect of reducing electromagnetic radiation, reducing damage, and reducing SAR

Inactive Publication Date: 2010-08-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1) If an antenna with low SAR is to be selected, the space requirements for the antenna are relatively high during implementation, not only requiring the antenna to have a larger area, but also requiring the height between the antenna and the ground in the mobile terminal to be above 8.5mm, However, the current popular mobile terminals are getting thinner and thinner, making the distance between the antenna and the ground closer and closer, and it is difficult to meet the antenna design standard, that is, the height between the antenna and the ground is greater than 8.5mm
It can be seen that it is difficult to achieve the purpose of reducing SAR through this method in the existing mobile terminal industry
[0009] 2) When reducing the transmit power of the mobile terminal, the measured antenna transmit power drops by 1dB, the SAR can be reduced by 0.2-0.3W / kg, but the measured TRP is also reduced, which may make the TRP of the mobile terminal unable to meet Test standards that affect the communication quality of mobile terminals
[0010] 3) Adding a wave-absorbing layer to the surface of the mobile terminal casing or antenna will indeed reduce the electromagnetic power absorbed by the human body, that is, it can reduce SAR, but the wave-absorbing layer will also absorb useful signals radiated outward in the form of electromagnetic waves. In this way, The useful signal is attenuated to a certain extent, that is to say, the radiation characteristic of the antenna is reduced, that is, the TRP is reduced, which ultimately affects the communication quality

Method used

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  • Mobile terminal capable of balancing specific absorption rate and total radiated power and implementation method thereof
  • Mobile terminal capable of balancing specific absorption rate and total radiated power and implementation method thereof
  • Mobile terminal capable of balancing specific absorption rate and total radiated power and implementation method thereof

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Experimental program
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Effect test

Embodiment 1

[0050] image 3 It is a structural schematic diagram of a mobile terminal that balances SAR and TRP in this embodiment. In this embodiment, the specific area with strong electromagnetic radiation is the casing area corresponding to the SAR peak hotspot position of the mobile terminal, such as image 3 The area 3 shown in the middle is filled with black, and the area 3 is determined by the SAR testing instrument. In this embodiment, the shielding layer 7 is first provided inside the casing area 3 corresponding to the SAR peak hotspot position, image 3 The part filled with the middle vertical line; then set the absorbing layer 8 on the shielding layer 7, image 3 For the part filled with backslashes, the setting method can be coating or pasting.

[0051] After the shielding layer 7 and the wave-absorbing layer 8 are arranged on one side of the shell of the mobile terminal 1, the electromagnetic waves in the region with the strongest coupling between the mobile terminal 1 and ...

Embodiment 2

[0057] Figure 4 It is a structural schematic diagram of a mobile terminal that balances SAR and TRP in this embodiment. In this embodiment, the specific area with strong electromagnetic radiation is an electromagnetic radiation hotspot area on the main board of the mobile terminal, such as Figure 4 The area 3 shown in the middle is filled with black, and the area 3 is determined by the SAR testing instrument. In the present embodiment, the wave-absorbing layer 8 is first set on the electromagnetic radiation hotspot area 3 on the main board of the mobile terminal, Figure 4 The part filled with the backslash in the middle; then set the shielding layer 7 on the wave-absorbing layer 8, Figure 4 The part filled with vertical lines can be set by painting or pasting.

[0058] After the shielding layer 7 and the wave-absorbing layer 8 are arranged on one side of the motherboard of the mobile terminal 1, the electromagnetic waves on the area with the strongest coupling between th...

Embodiment 3

[0063] Figure 5 It is a structural schematic diagram of a mobile terminal that balances SAR and TRP in this embodiment. In this embodiment, the specific region with strong electromagnetic radiation is a high-power device in the mobile terminal, that is, a power amplifier, such as Figure 5 The regions 3 and 9 shown by the black filling in the middle are specific regions 3 with strong electromagnetic radiation, that is, the shielding cover outside the power amplifier, which is an existing component in the mobile terminal. In this embodiment, a wave-absorbing layer 8 is first set on the power amplifier 3 of the mobile terminal, Figure 5 The part filled with the backslash in the middle; then set the shielding layer 7 on the wave-absorbing layer 8, Figure 5 The part filled with vertical lines can be set by painting or pasting.

[0064] After the shielding layer 7 and the wave-absorbing layer 8 are set on the power amplifier of the mobile terminal 1, the electromagnetic waves ...

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PUM

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Abstract

The invention discloses a mobile terminal capable of balancing specific absorption rate (SAR) and total radiated power (TRP), comprising a case, a main board and an antenna; wherein the case or / and the main board all contain specific region with strong electromagnetic radiation, one side of the specific region with strong electromagnetic radiation is provided with an isolating layer used for isolating electromagnetic wave. The invention also discloses a method for balancing SAR and TRP; by applying the mobile terminal and the method, SAR can be reduced without influencing TRP of mobile terminal.

Description

technical field [0001] The present invention relates to a technique for reducing the Absorption Radiation Rate (SAR, Specific Absorption Rate) of a mobile terminal, in particular to a mobile terminal and an implementation method for balancing SAR and Total Radiated Power (TRP, Total Radiated Power). Background technique [0002] SAR is usually called absorption ratio or specific absorption rate, which refers to the absorption ratio of electromagnetic wave energy of mobile terminals. The specific meaning is: under the action of external electromagnetic field, an induced electromagnetic field will be generated in the human body. The electromagnetic field in the body will generate an induced current, causing the human body to absorb and dissipate electromagnetic energy. SAR is often used in biological dosimetry to characterize this physical process. The meaning of SAR is the electromagnetic power absorbed or consumed by a unit mass of human tissue, and the unit is W / kg, or mW / g...

Claims

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Application Information

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IPC IPC(8): H04M1/02H05K9/00
CPCH01Q1/526H01Q1/245
Inventor 马丹王磊赵晨飞
Owner ZTE CORP
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