Multi-antenna mobile phone data card capable of reducing specific absorption rate, and method of the same

Abstract

The invention relates to a multi-antenna mobile phone data card capable of reducing specific absorption rate, and a method of the same. The data card comprises a radio frequency substrate, an antenna used for sending and receiving signals and connected between the radio frequency substrate and the antenna, and a feed source for exciting the antenna. The radio frequency substrate is rectangular, the feed source is arranged at a first corner; a second corner, adjacent to the first corner and located at one side of a short edge where the first corner is, is provided with a first hollowed part, the first hollowed part is provided with a first metal strap, one side of the first metal strap is connected with the short edge, and the other end of the metal strap is a free end; and a first electrical length formed from the feed source to the free end of the first metal strap is equal to a second electrical length formed from the feed source to a bottom end of a long edge where the first corner is. According to the invention, by change of the shape of the radio frequency substrate, the electrical lengths from the feed source to several marginal points are respectively equal, current peak and SAR (Specific Absorption Rate) value on the radio frequency substrate are reduced, and structure space is saved, thus, radiation hazard of the data card to human body is reduced.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a multi-antenna mobile phone data card and a method for reducing the Specific Absorption Rate (SAR, Specific Absorption Rate). Background technique [0002] With the rapid development of wireless communication technology, personal mobile phone data cards (mobile phones, data cards, MiFi / Hotspot, etc.) are widely popularized and applied. In daily application scenarios, the distance between such products and the human body is getting smaller and smaller, and the impact of electromagnetic radiation brought by mobile phone data cards on human health has become a public concern. [0003] Usually, the SAR indicator is used internationally to measure the energy absorbed by the human body in an electromagnetic exposure environment. Many countries have formulated corresponding regulations to ensure the safety of electromagnetic radiation on the human body by limiting the upp...

AI Technical Summary

Problems solved by technology

However, reflectors and shields require a larger space during assembly, which cannot meet the needs of mobile phone data card miniaturization design

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