標題: | 60-GHz Dual-Conversion Down-/Up-Converters Using Schottky Diode in 0.18 mu m Foundry CMOS Technology |
作者: | Wei, Hung-Ju Meng, Chinchun Wang, Ta-Wei Lo, Tai-Lin Wang, Chia-Ling 電機工程學系 Department of Electrical and Computer Engineering |
關鍵字: | Converter;dual conversion;mixer;phase-inverter rat-race coupler;Schottky diode;single-sideband rejection;sub-harmonically pumped mixer;trifilar transformer;0.18-mu m foundry CMOS technology;60-GHz |
公開日期: | 1-六月-2012 |
摘要: | Due to the benefits of Schottky diodes, 0.18-mu m CMOS technology is being promoted for millimeter wave applications. In this paper, 60-GHz dual-conversion down-/up-converters using Schottky diodes are realized by using 0.18-mu m foundry CMOS technology. A CoSi2-Si Schottky diode, fabricated on a lower doped N-well by blocking the threshold voltage adjustment implant, has a lower reverse leakage current and a better ideality factor. Thus, it is ideal for the 60-GHz sub-harmonic mixer design. Two new types of Schottky-diode mixers, a down-conversion sub-harmonic mixer with a dual-band lump-distributed phase-inverter rat-race coupler and an up-conversion sub-harmonic mixer with a trifilar transformer, are realized and employed at the high-frequency conversion stage of the dual-conversion architecture to achieve small size and broadband isolations. The silicon-based Schottky diode with a low turn-on voltage offers great advantage in LO pumping power, especially for an antiparallel diode pair structure. In our Schottky-diode sub-harmonic mixers, the required LO power is only 1 dBm. The dual-conversion down-converter achieves 5-dB conversion gain and 19 dB noise figure under V-dd = 2.5 V and I-dd = 22 mA, and the dual-conversion up-converter, with V-dd = 2.5 V and I-dd = 26 mA, attains greater than 40-dB sideband rejection and -1 dB conversion gain over the whole 60-GHz bandwidth. |
URI: | http://hdl.handle.net/11536/16271 |
ISSN: | 0018-9480 |
期刊: | IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES |
Volume: | 60 |
Issue: | 6 |
結束頁: | 1684 |
顯示於類別: | 期刊論文 |