Method and device for realizing SAR (Specific Absorption Rate) control

A phase shifter and metal ground technology, applied in the field of communication, can solve the problems of unsuitable application of data card wireless terminal products, large space occupation, single-sided SAR reduction, etc., achieve great flexibility and adaptability, save space, reduce The effect of absorption peak

Inactive Publication Date: 2015-04-01
ZTE CORP
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of technology takes up a lot of space and is suitable for the reduction of one-sided SAR of mobile phone products, so it is not suitable for application in data card wireless terminal products

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for realizing SAR (Specific Absorption Rate) control
  • Method and device for realizing SAR (Specific Absorption Rate) control
  • Method and device for realizing SAR (Specific Absorption Rate) control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In general, in order to reduce the SAR value without affecting the overall radiation quality of the wireless terminal antenna, a phase shifter composed of multiple lumped circuit elements can be introduced at the metal ground edge of the data card PCB, by changing the induced current of the PCB metal ground edge The phase and distribution of the antenna change the radiation characteristics in the near area of ​​the antenna, so as to achieve the purpose of reducing the SAR value.

[0033] To achieve the above object, the technical solution of the present invention is achieved in this way:

[0034] Specifically, the wireless terminal may include: a single-layer / multi-layer PCB with radio frequency baseband circuits, a main antenna for transmitting and receiving, a diversity / MIMO antenna for receiving, a structural case, a USB connector, multiple A phase shifter located on the metal ground edge of the PCB board. Since multiple phase shifters are added to the metal ground ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The disclosure discloses a method and device for realizing Specific Absorption Rate (SAR) control, in both of which phase shifters can be provided on a metal ground edge of a wireless terminal, and an induced current of the metal ground edge can be altered by applying the phase shifters, so as to reduce an antenna near field radiation characteristic of an SAR. The method and device of the disclosure can alter current phase and amplitude distribution of the metal ground without affecting the reception and transmission performance of the terminal, so as to reduce a local SAR peak value and lessen the harm of radiation to human bodies. Furthermore, the disclosure does not require any major change in a structure, circuit, and, antenna of a designed model, and can save space. The disclosure bears great flexibility and adaptability in an application, thereby realizing the objective of miniaturized design of the wireless terminal.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for realizing specific absorption rate (SAR) control. Background technique [0002] With the rapid development of wireless communication technology, wireless terminals (mobile phones, data cards, MiFi / Hotspot products) have been widely used; at the same time, the impact of electromagnetic radiation brought by wireless terminals on human health has become a topic of public concern. [0003] Existing SAR reduction technologies mostly adopt methods such as reducing the power of the transmitter, using wave-absorbing materials, conductor reflectors and shields, and coating the surface of the casing with anti-radiation and wave-absorbing coatings. This will not only increase the cost and complexity of the process, but also affect the communication signal, without fundamentally solving the contradiction between human radiation safety and high-quality wireless communication....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/24H04B1/38
CPCH01Q1/52H04B1/3838H01Q1/2275H01Q1/245H01Q9/30H01Q3/00
Inventor 张璐
Owner ZTE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap