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An inkjet-printed solar-powered wireless beacon on paper for identification and wireless power transmission applications

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Article number6353235
Pages (from-to)4178-4186
Number of pages9
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number12
Publication statusPublished - 2012
Publication typeA1 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.


  • Active antennas, energy harvesting, flexible electronics, harmonic balance, inkjet printing, solar antenna, wireless beacon, wireless energy transfer, wireless identification