LONDON Antenna specialist SkyCross (Viera, FL.) claims it has developed a way to reduce Specific Absorption Rate (SAR) levels in small wireless devices without sacrificing signal strength.
The company suggests it is possible to reduce the SAR by up to 50 percent by incorporating its iMAT technology in small wireless devices. This, the company says, could allow the devices to operate using half the power without any change in signal strength.
The iMAT technique was launched early last year and is now incorporated in many of SkyCross' antenna devices, replacing antennas traditionally targeting diversity or MIMO functionality. The technology is also claimed to reduce space and bill of materials.
It is well known that reducing power nominally by 50 percent also reduces the SAR by 50 percent, but, SkyCross maintains, prior to the availability of its technology, this would also mean that the SNR was cut in half.
SAR measures the rate that the body absorbs radio-frequency energy when exposed to an electromagnetic field. Governments around the world regulate SAR levels for wireless devices including handsets, USB dongles, and laptops as a safety precaution.
The company's iMAT (Isolated Mode Antenna Technology) is a design technique that enables a single antenna element to behave like multiple antennas.
By deploying the technology in a small device such as a USB dongle, where it is particularly challenging to support multiple antennas, iMAT enables transmit beam forming so SNR is not affected when the output power is reduced, the company says.
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