| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
In this project, RF-to-DC energy harvesting circuit was developed. The circuit was composed of a one-sided directional flexible antenna, an impedance matching circuit, a resonant circuit, and a booster circuit for converting and boosting radio frequency power into DC voltage. The booster circuit was based on traditional Cockcrof-Walton circuit. One-sided directional flexible antenna is composed of slot antenna, interdigital gap and coplanar wave guide. Power conversion efficiency at -10 dBm input @ 900 MHz is optimized by the load resistance. Simulated conversion efficiency is 58.7%. Because of the effect of the parasitic components in the circuit, measured efficiency was 44%. By implementing this circuit on CMOS, effect of the parasitic components will be reduced.
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