Fully roll-to-roll gravure printed rectenna on plastic foils
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IOP Science – Wireless power transmission to inexpensive and disposable smart electronic devices is one of the key issues for the realization of a ubiquitous society where sensor networks such as RFID tags, price tags, smart logos, signage and sensors could be fully interconnected and utilized by DC power of less than 0.3 W. This DC power can be provided by inductively coupled AC from a 13.56 MHz power transmitter through a rectenna, consisting of an antenna, a diode and a capacitor, which would be cheap to integrate with inexpensive smart electronic devices. To integrate the rectenna with a minimum cost, a roll-to-roll (R2R) gravure printing process has been considered to print the rectenna on plastic foils. In this paper, R2R gravure printing systems including printing condition and four different nanoparticle based inks will be reported to print the rectenna (antenna, diode and capacitor) on plastic foils at a printing speed of 8 meter per minute and more than 90% device yield for a wireless power transmission of 0.3 W using a standard 13.56 MHz power transmitter.
This will enable wireless power for less than a penny per device.
Technology Review – it’s a type of near-field communication (NFC). The team envisions using rectennas not as an element of a digital wallet, but more in the vein of QR codes.
(a) Circuit layout and (b) image of the R2R gravure printed rectenna on PET foil with descriptive schemes of each device (printed capacitor, printed diode, printed bottom Ag electrode).
Says study co-author Gyojin Cho: “Our advantage over current technology is lower cost, since we can produce a roll-to-roll printing process with high throughput in an environmentally friendly manner. Furthermore, we can integrate many extra functions without huge extra cost in the printing process. The application of NFC technology with the smartphone will be limitless in the near future. The medical, automotive, military and aerospace industries will benefit greatly.”
See more and subscribe to NextBigFuture at 2012-08-10 12:09:42 Source: http://nextbigfuture.com/2012/08/fully-roll-to-roll-gravure-printed.html
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