21 February 2011 Phase shifter using carbon nanotube thin-film transistor for flexible phased-array antenna
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Proceedings Volume 7936, RF and Millimeter-Wave Photonics; 793604 (2011); doi: 10.1117/12.876158
Event: SPIE OPTO, 2011, San Francisco, California, United States
Printing technique is a simple and cost effective method to produce electronics. In this work, self-aligned carbon nanotube thin-film transistor based phased shifter has been used to fabricate a 1x4 phased array antenna system on a flexible substrate using a combination of ink-jet printing and stamping techniques. The radiation pattern is measured for different steering angle conditions. Measured and simulated far field radiation patterns are reported, and both data sets agree well with each other. The efficiency the 2-bit 1x4 PAA system is calculated to be 42% including the loss of transmission line, FET switch, and coupling loss of RF probes.
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Daniel Pham, Harish Subbaraman, Maggie Yihong Chen, Xiaochuan Xu, Ray T. Chen, "Phase shifter using carbon nanotube thin-film transistor for flexible phased-array antenna", Proc. SPIE 7936, RF and Millimeter-Wave Photonics, 793604 (21 February 2011); doi: 10.1117/12.876158; https://doi.org/10.1117/12.876158



Phase shifts



Carbon nanotubes

Thin films

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