An inkjet-printed solar-powered wireless beacon on paper for identification and wireless power transmission applications
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||9|
|Journal||IEEE Transactions on Microwave Theory and Techniques|
|Publication status||Published - 2012|
|Publication type||A1 Journal article-refereed|
This paper demonstrates the design of an 800-MHz solar-powered active wireless beacon composed of an antenna and an integrated oscillator on a low-cost paper substrate. Inkjet printing is used to fabricate the conductive circuit traces and the folded slot antenna, while the oscillator circuit is designed using off-the-shelf components mounted on the paper substrate. Flexible, low-cost, amorphous silicon (a-Si) solar cells are placed on top of the slot ground and provide autonomous operation of the active circuit eliminating the use of a battery. A prototype is built and characterized in terms of phase noise, radiation patterns, and the effect of solar irradiance. Such low-cost flexible circuits can find significant applications as beacon generator circuits for real-time identification and position purposes, wearable biomonitoring as well as solar-to-wireless power transfer topologies. The measured phase noise is-116 dBc/Hz at 1-MHz offset, while drain current is 4 mA and supply voltage is 1.8 V.