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A K-Band CMOS Voltage Controlled Delay Line Based on an Artificial Left-Handed Transmission Line

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4 Author(s)
Choul-Young Kim ; Sch. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon ; Jaemo Yang ; Dong-Wook Kim ; Songcheol Hong

A K-band voltage controlled delay line based on a left-handed transmission line (LHTL) with cascaded metal-oxide-semiconductor (MOS) varactors and shunt inductors using CMOS technology is demonstrated for the first time. A variable time delay can be obtained by changing the capacitance of MOS varactors without any power consumption. The figure of merit is 10.9deg/dB at 18 GHz. This result is better than other variable LHTL in similar frequency band. A time delay ranging from 56.8 ps to 76.4 ps is achieved at 18 GHz. It allows about 30 times longer time delay than that of a traditional right-handed one with the same length. The chip size, including the pads, is 410 mum times 640 mum.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:18 ,  Issue: 11 )

Date of Publication:

Nov. 2008

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