Low‐power 77–81 GHz CMOS LNA with excellent matching for automotive radars. Issue 3 (1st January 2014)

• Record Type: Journal Article
• Authors: Lin, Y.‐S.; Lee, G.‐L.; Wang, C.‐C.
• Is Part Of: Electronics letters. Volume 50:Issue 3(2014)
• Page Start: 207
• Page End: 209
• Publication Date: 2014-01-01
• Subjects: CMOS analogue integrated circuits -- impedance matching -- low noise amplifiers -- low‐power electronics -- millimetre wave amplifiers -- millimetre wave integrated circuits -- road vehicle radar -- wideband amplifiers -- millimetre wave radar; low power wideband three‐stage low‐noise amplifier -- LNA -- standard CMOS technology -- T‐match technique -- automotive radar -- wideband input impedance matching -- wideband output impedance matching -- wideband power gain -- wideband noise figure -- group delay variation -- size 90 nm -- power 21.1 mW -- frequency 62.3 GHz to 82.4 GHz -- frequency 62.8 GHz to 84.6 GHz -- gain 3 dB -- bandwidth 12 GHz -- noise figure 6.2 dB; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2013.2631
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A low‐power and wideband three‐stage 77–81 GHz low‐noise amplifier (LNA) using standard 90 nm CMOS technology is reported. The T‐match technique is utilised to achieve simultaneously wideband input and output impedance matching, wideband power gain ( S 21 ) and a wideband noise figure (NF). The LNA consumes 21.1 mW, achieving S 11 better than −10 dB for the frequencies 62.3–82.4 GHz, S 22 better than −10 dB for the frequencies 62.8–84.6 GHz, S 12 better than −29 dB for the frequencies 72–84 GHz and a group delay variation smaller than ±4 ps for the frequencies 77–81 GHz. In addition, high and flat S 21 of 13.1 ± 1.5 dB is achieved for the frequencies 72–84 GHz, which means the corresponding 3 dB bandwidth is 12 GHz. Furthermore, the LNA achieves a minimum NF of 6.2 dB at 78 GHz and a NF of 6.8 ± 0.6 dB for the frequencies 75–82 GHz, one of the best NF results ever reported for a CMOS LNA for 77–81 GHz automotive radar applications.