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http://dx.doi.org/10.5515/KJKIEES.2011.22.3.399

Design of Q-Band LC VCO and Injection Locking Buffer 77 GHz Automotive Radar Sensor  

Choi, Kyu-Jin (School of Information and Communication Engineering, Sungkyunkwan University)
Song, Jae-Hoon (Department of Electrical Engineering, Seoul National University)
Kim, Seong-Kyun (School of Information and Communication Engineering, Sungkyunkwan University)
Cui, Chenglin (School of Information and Communication Engineering, Sungkyunkwan University)
Nam, Sang-Wook (Department of Electrical Engineering, Seoul National University)
Kim, Byung-Sung (School of Information and Communication Engineering, Sungkyunkwan University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.3, 2011 , pp. 399-405 More about this Journal
Abstract
In this paper, we present the design of Q-band LC VCO and injection locking buffer for 77 GHz automotive radar sensor using 130 nm RF CMOS process. To improve the phase noise characteristic of LC tank, the transmission line is used. The negative resistance by the active device cross-coupled pair of buffer is used for high output power, with or without oscillation of buffer. The measured phase noise is -102 dBc/Hz at 1 MHz offset frequency and tuning range is 34.53~35.07 GHz. The output power is higher than 4.1 dBm over entire tuning range. The fabricated chip size is $510{\times}130\;um^2$. The power consumption of LC VCO is 10.8 mW and injection locking buffer is 50.4 mW from 1.2 V supply.
Keywords
Injection Locking; FMCW Radar; CMOS VCO; Automotive Radar Sensor;
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