Title :
Characteristics of a 60 GHz direct conversion quadrature modulator/demodulator
Author :
Kobayashi, Jun ; Ozawa, Fumio ; Toriyama, Yasuhiro ; Shirosaki, Toshifumi ; Taniguchi, Toru ; Matsuzawa, Akira
Author_Institution :
Japan Radio Co., Ltd., Tokyo, Japan
Abstract :
This paper describes elaborate characteristics of a 60 GHz direct-conversion quadrature modulator/demodulator which is fabricated in 65 nm CMOS technology. The measured I/Q imbalance of the modulator/demodulator is less than 0.7 dB in gain and 4.5 degrees in phase over a 10 MHz to 900 MHz baseband frequency range. Flatness of the frequency characteristics of the modulator/demodulator is less than -3 dB over a 2.16 GHz bandwidth. Phase noise of local oscillator is -95 dBc/Hz at 1MHz-offset.
Keywords :
CMOS integrated circuits; modems; oscillators; phase noise; radio transceivers; CMOS technology; I/Q imbalance; direct conversion quadrature modulator-demodulator; frequency 1 MHz; frequency 10 MHz to 900 MHz; frequency 60 GHz; frequency characteristic; oscillator; phase noise; size 65 nm; Demodulation; Frequency measurement; Frequency modulation; Gain; Mixers; Phase modulation; 60GHz; CMOS; direct conversion; mm-wave; quadrature modulator/demodulator;
Conference_Titel :
Microwave Conference (GeMiC), 2012 The 7th German
Conference_Location :
Ilmenau
Print_ISBN :
978-1-4577-2096-3
Electronic_ISBN :
978-3-9812668-4-9
