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http://dx.doi.org/10.7471/ikeee.2018.22.2.408

26GHz 40nm CMOS Wideband Variable Gain Amplifier Design for Automotive Radar  

Choi, Han-Woong (Dept. of Electronics Engineering, Chungnam National University)
Choi, Sun-Kyu (Dept. of Electronics Engineering, Chungnam National University)
Lee, Eun-Gyu (Dept. of Electronics Engineering, Chungnam National University)
Lee, Jae-Eun (Dept. of Electronics Engineering, Chungnam National University)
Lim, Jeong-Taek (Dept. of Electronics Engineering, Chungnam National University)
Lee, Kyeong-Kyeok (Dept. of Electronics Engineering, Chungnam National University)
Song, Jae-Hyeok (Dept. of Electronics Engineering, Chungnam National University)
Kim, Sang-Hyo (Dept. of Electronics Engineering, Chungnam National University)
Kim, Choul-Young (Dept. of Electronics Engineering, Chungnam National University)
Publication Information
Journal of IKEEE / v.22, no.2, 2018 , pp. 408-412 More about this Journal
Abstract
In this paper, a 26GHz variable gain amplifier fabricated using a 40nm CMOS process is studied. In the case of an automobile radar using 79 GHz, it is advantageous in designing and driving to drive down to a low frequency band or to use a low frequency band before up conversion rather than designing and matching the entire circuit to 79 GHz in terms of frequency characteristics. In the case of a Phased Array System that uses time delay through TTD (True Time Delay) in practice, down conversion to a lower frequency is advantageous in realizing a real time delay and reducing errors. For a VGA (Variable Gain Amplifier) operating in the 26GHz frequency band that is 1/3 of the frequency of 79GHz, VDD : 1V, Bias 0.95V, S11 is designed to be <-9.8dB (Mea. High gain mode) and S22 < (Mea. high gain mode), Gain: 2.69dB (Mea. high gain mode), and P1dB: -15 dBm (Mea. high gain mode). In low gain mode, S11 is <-3.3dB (Mea. Low gain mode), S22 <-8.6dB (Mea. low gain mode), Gain: 0dB (Mea. low gain mode), P1dB: -21dBm (Mea. Low gain mode).
Keywords
Variable Gain Amplifier; Phased Array; Automobile; Cascode Amplifier; Up conversion; Down conversion; Gain control;
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