The changes in the impedance of an antenna-coupled photo-detector under optical illumination are used to encode data on a backscattered wireless signal similarly to the standard techniques used for radio frequency identification and tagging. The effect is strong enough to allow retrieval of the information without requiring a dc supply at the optical to wireless interface.
Published in:
Microwave and Wireless Components Letters, IEEE
(Volume:23
,
Issue:
2
)
Date of Publication: Feb. 2013