Title :
A 35-50 GHz IQ-Demodulator in 0.13-μm CMOS Technology
Author :
Lin, Chin-Shen ; Chang, Hong-Yeh ; Wu, Pei-Si ; Lin, Kun-You ; Wang, Huei
Author_Institution :
Nat. Taiwan Univ., Taipei
Abstract :
A broadband millimeter-wave (MMW) IQ demodulator is presented in this paper using standard 1P8M 0.13-μm CMOS technology. This IQ demodulator consists of two Gilbert-cell mixers, one 90° broadside coupler, and one Wilkinson power divider. This IQ demodulator has a conversion loss better than 3 dB from 35 to 50 GHz. The magnitude imbalance and image-signal rejection ratio are smaller than 1 dB and greater than 25 dBc, respectively. The 16-QAM baseband signals with 1 MHz symbol rate are used to test the digital demodulation performance. The 16-QAM baseband signals can be demodulated with an EVM of 6.3%. The chip area of this IQ demodulator is 0.9 × 1 mm2 including all testing pads.
Keywords :
CMOS integrated circuits; demodulators; millimetre wave couplers; millimetre wave mixers; power dividers; quadrature amplitude modulation; 0.13-mum CMOS technology; 16-QAM baseband signals; EVM; Gilbert-cell mixer; Wilkinson power divider; broadband millimeter-wave IQ-demodulator; broadside coupler; frequency 1 MHz; frequency 35 GHz to 50 GHz; magnitude imbalance; quadrature amplitude modulation; size 0.13 mum; Baseband; CMOS technology; Circuits; Demodulation; Metal-insulator structures; Millimeter wave radar; Millimeter wave technology; Power dividers; RF signals; Radio frequency; CMOS; Gilbert cell; demodulator; microwave monolithic integrated circuit (MMIC); mixer;
Conference_Titel :
Microwave Symposium, 2007. IEEE/MTT-S International
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0687-0
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2007.380492
