Journal
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
Volume 21, Issue 6, Pages 311-313Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LMWC.2011.2138688
Keywords
CMOS; phase shifter; tunable metamaterial
Categories
Funding
- Korean government (MEST) [2009-0086266]
- IDEC (IC Design Education Center)
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This letter presents a K-band phase shifter monolithic microwave integrated circuit (MMIC) which is based on electrically tunable composite left- and right-handed metamaterials. This structure utilizes both positive and negative phase shifting metameterial characteristics to allow for a wide tuning range. This is achieved by varying both the capacitance and inductance of the metamaterial structure. The inductance tuning is realized by an improved active inductor with a self-resonant frequency greater than 20 GHz. The phase shifter is divided into four sections of unit cell metamaterial and is implemented in 0.13 mu m radio frequency complementary metal-oxide-semiconductor (RFCMOS) technology. The phase shifter exhibits a continuous phase tuning range of 121 degrees (from -80 degrees to +41 degrees) and 136 degrees (from -120 degrees to +16 degrees) at 21.5 and 22.5 GHz, respectively. The minimum insertion loss is -10.1 and -10.5 dB at 21.5 and 22.5 GHz, respectively. At 26 GHz, a wide phase shift of greater than 300 degrees is achieved in a compact chip area of 0.28 mm(2).
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