The energy absorbed by the hand/wrist from a RF device is an important issue as it can affect the radiation pattern and cause considerable degradation of application performance.
IndexSAR have produced hand phantoms for many years, they were in close collaboration with a number of major handset manufacturers to develop a standard IndexSAR ‘Classic’ hand grip.
The IXB-065L has been specifically developed for testing wrist worn wireless devices, with a mounting suitable to be used in both ‘conical cut’ of ‘roll over azimuth’ OTA test systems.
The hand is 10% by dimension larger than the classic IXB-09x range of hands.
The hand is produced from silicone, loaded with carbon powder as the predominant lossy material to give the required dielectric properties over the wide frequency range of 600MHz to 2.8GHz.
For positional repeatability the hands are reasonably ‘stiff’, allowing some flexibility to cater for most ‘Block’ DUT’s.
Positioning accuracy and repeatability are of key importance, and with the unique air spacer/ platform, repeatability +/- 0.1dB has been achieved in OTA tests.