A 24-GHz receiver frontend with an LO signal generator in 0.18-mu m CMOS

作者：Chen Yu Hsin^*; Hsieh Hsieh Hung; Lu Liang Hung

来源：IEEE Transactions on Microwave Theory and Techniques, 2008, 56(5): 1043-1051.

DOI：10.1109/TMTT.2008.920154

• CMOS monolithic microwave integrated circuit (MMIC)
• down-conversion mixers
• image rejection
• K-band
• low-noise amplifiers (LNAs)
• low-phase-noise voltage-controlled oscillators (VCOs)
• receiver frontends

Utilizing a standard 0.18-mu m CMOS process, a receiver frontend and a local oscillator (LO) module are implemented for RF applications at the 24-GHz industrial, scientific, medical band. The proposed frontend is composed of a three-stage low-noise amplifier, a down-conversion mixer, and IF amplifiers. With an IF frequency of 4.82 GHz, the fabricated circuit demonstrates a conversion gain of 28.4 dB and a noise figure of 6.0 dB while maintaining an input return loss better than 14 dB. The measured Pin-1dB and IIP3 of the receiver frontend are -23.2 and - 13.0 dBm, respectively. In addition, a circuit module, which generates the required dual down-conversion LO signals, is also included in this study. The proposed LO generator consists of a 19-GHz low-phase-noise voltage-controlled oscillator (VCO), a 4: 1 frequency divider, and a quadrature phase-tuning circuit. From the measurement results, the VCO exhibits a tuning range of 850 MHz and a phase noise of -110 dBc/Hz at 1-MHz offset frequency. Operated at a supply voltage of 1.8 V, the current consumptions for the receiver frontend and the LO generator are both 30 mA.

• 出版日期2008-5
• 单位中国科学院电工研究所