Conformal Ink-Jet Printed C-Band Phased-Array Antenna Incorporating Carbon Nanotube Field-Effect Transistor Based Reconfigurable True-Time Delay Lines

We present a conformal ink-jet printed 2-bit four-element phased-array antenna (PAA) without any lithography process. Passive and active components, such as microstrip transmission lines, phase shifters, and RF power distribution networks are all developed adopting a room-temperature printing proces...

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Veröffentlicht in:	IEEE transactions on microwave theory and techniques 2012-01, Vol.60 (1), p.179-184
Hauptverfasser:	Chen, Maggie Yihong, Pham, D., Subbaraman, H., Lu, X., Chen, R. T.
Format:	Artikel
Sprache:	eng
Schlagworte:	Antenna measurements Antennas Applied sciences Carbon nanotube (CNT) Circuit properties Circuits of signal characteristics conditioning (including delay circuits) conformal antennas Delay lines Electric, optical and optoelectronic circuits Electrodes Electronic circuits Electronics Exact sciences and technology FETs field-effect transistor (FET) switches ink-jet printing Logic gates Materials Microelectronic fabrication (materials and surfaces technology) Molecular electronics, nanoelectronics Phase shifters phased-array antennas (PAAs) Polyimide resins Radio frequencies Radiocommunications Semiconductor devices Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Switches Telecommunications Telecommunications and information theory Transistors Transmission line measurements
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Zusammenfassung:	We present a conformal ink-jet printed 2-bit four-element phased-array antenna (PAA) without any lithography process. Passive and active components, such as microstrip transmission lines, phase shifters, and RF power distribution networks are all developed adopting a room-temperature printing process. The PAA working at 5.2 GHz is printed on flexible DuPont Kapton flexible printed circuit polyimide film to demonstrate the conformal nature. High-speed carbon-nanotube-based field-effect transistors (FETs) function as switches to route the RF signal go through different segments of the true-time delay lines. The FET switch exhibits an on-off ratio of over 1000 and current of 3.6 mA is obtained at a low source-drain bias of 0.8 V. The 2-bit azimuth beamsteering angles of the PAA are measured and confirmed to agree well with simulation values.
ISSN:	0018-9480 1557-9670
DOI:	10.1109/TMTT.2011.2173209