Abstract
The use of digital television broadcasting standards has resulted in transmission of perpetually on wireless digital-TV signals over the air at wider bandwidths in ultrahigh-frequency bands for high-definition video and audio broadcasts to TV and smart phones. This paper presents a unique embedded wireless energy-harvesting prototype (E-WEHP) that exploits the unique makeup of ambient digital-TV signals, and scavenges wireless power from them at distance of over 6.3 km from the TV broadcast source. The harvested wireless power is successfully used to power and sustain a 16-bit embedded microcontroller for sensing and machine-to-machine applications without the use of batteries. The E-WEHP uses a miniaturized planar log-periodic antenna and RF-dc charge-pump circuit with maximum sensitivities of-14.6 and-18.86 dBm and an embedded firmware-based power management scheme to power microcontroller peripherals from different types of ambient digital-TV signals.
| Original language | English |
|---|---|
| Article number | 6513298 |
| Pages (from-to) | 2491-2505 |
| Number of pages | 15 |
| Journal | IEEE Transactions on Microwave Theory and Techniques |
| Volume | 61 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2013 |
| Publication type | A1 Journal article-refereed |
Keywords
- Antenna
- autonomous sensors
- charge-pump
- digital TV
- embedded microcontroller
- energy harvesting
- power scavenging
- RF-dc
- ultrahigh-frequency (UHF)
- voltage multiplier
- wireless power
ASJC Scopus subject areas
- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering