What Is The Difference Between Head SAR And Body SAR?

How does SAR value affect the body?

SAR values increase as the conductivities of human body tissues increase and usually decrease as the increase of relative permittivities of human body tissues increase.

The effect of the dielectric values of human body on SAR is orientation, human body and frequency dependent..

How is SAR calculated?

Calculation. SAR measures exposure to fields between 100 kHz and 10 GHz (known as radio waves). It is commonly used to measure power absorbed from mobile phones and during MRI scans. … Thus tests must be made with each specific source, such as a mobile phone model, and at the intended position of use.

Why is body SAR higher than head SAR?

Tilt positions of mobile phone produce higher SAR than that of cheek position due to the reduced distance between helical antenna and human head. Although the body of the mobile phone was directly next to the head, the antenna extrudes far from the head.

Is SAR value of 1.5 Dangerous?

Federal Communications Commission (FCC) in the US has set an SAR level of 1.6 W/Kg for phones and the same measurement is followed in India. This means phone below 1.6W/kg are considered good.

Is SAR value harmful?

SAR value is the rate at which the body absorbs this lost electromagnetic waves. Phones contain radio transmitters and receiver in order to operate on the wireless network. … According to US Federal Communications Commission (FCC), phones with a SAR level of 1.6 W/Kg for body or below are deemed safe.

Should I worry about SAR rating?

So don’t worry about radiation, it’s an awesome phone! SAR (specific absorption rate) is an indication of the amount of radiation that is absorbed into a head whilst using a cellular phone, the higher the SAR rating the more radiation that is absorbed into the head.

Which SAR value is safe for head and body?

1.6 watts per kilogramA mobile device’s SAR rating is used to estimate the maximum rate of RF energy absorption by a user’s head and body when using the device. In the United States, the Federal Communications Commission (FCC) sets the exposure limit for the general public to be an SAR level of 1.6 watts per kilogram (1.6 W/kg).

Which phone has highest radiation?

Xiaomi Mi A1 emits the highest level of radiation in a list of current smartphone models, followed by the OnePlus 5T, according to research conducted the German Federal Office for Radiation Protection (Bundesamt für Strahlenschutz).

Which cell phone has the lowest SAR rating?

Samsung Galaxy Note8Following the criteria set for this chart (see footnotes), the smartphones creating the lowest level of radiation are the Samsung Galaxy Note8 and the ZTE Axon Elite – with a specific absorption rate of 0.17 watts per kilogram.

How can reduce SAR?

How to reduce the SAR value of your phoneReduce SAR value by using earphone. … Lower SAR value by using speakerphone. … Use your phone as short as possible. … Use special materia headphone. … Avoiding use phone while its signal is weak.

What level of SAR is safe?

Any cell phone at or below these SAR levels (that is, any phone legally sold in the U.S.) is a “safe” phone, as measured by these standards. The FCC limit for public exposure from cellular telephones is an SAR level of 1.6 watts per kilogram (1.6 W/kg).

How far does cell phone radiation reach?

In the testing procedures the FCC uses to certify that cell phones don’t exceed the 1.6 watts per kilogram SAR limit, the commission chose to test the phones at a distance of between 0.59 inches and 0.98 inches (1.5cm to 2.5cm) from the body.