Title :
A wide modulation bandwidth bidirectional CMOS IQ modulator/demodulator for microwave and millimeter-wave gigabit applications
Author :
Shou-Hsien Weng ; Che-Hao Shen ; Hong-Yeh Chang
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Jhongli, Taiwan
Abstract :
A wide modulation bandwidth bidirectional IQ modulator/demodulator using 0.18 μm CMOS process is presented in this paper. Two doubly balanced modified Gilbert-cell resistive mixers are employed in the circuit design to achieve both broad RF and baseband bandwidths. The proposed IQ modulator/demodulator demonstrates a RF bandwidth of from 25 to 52 GHz, and a modulation bandwidth of from dc to 14 GHz. Furthermore, the modulation or demodulation can be performed at the same input/output ports of the proposed circuit, and the complexity of the transceiver can be reduced. The bidirectional IQ modulator/demodulator has a potential for 10 gigabit bidirectional communication systems in microwave and millimeter-wave (MMW) band.
Keywords :
CMOS integrated circuits; MMIC mixers; field effect MIMIC; field effect MMIC; millimetre wave mixers; modems; radio transceivers; bandwidth 14 GHz; bandwidth 25 GHz to 52 GHz; baseband bandwidths; broad RF bandwidths; doubly balanced modified Gilbert-cell resistive mixers; microwave gigabit applications; millimeter-wave gigabit applications; size 0.18 mum; transceiver; wide modulation bandwidth bidirectional CMOS IQ modulator-demodulator; Bandwidth; Demodulation; Frequency measurement; Logic gates; Mixers; Radio frequency; CMOS; bidirectional; demodulation; modulation;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2012 7th European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2302-4
Electronic_ISBN :
978-2-87487-026-2
