Dual-Mode and Dual-Band Circuit Techniques for CMOS Automotive Radar Transmitter Applications

• Main Authors: Yi-Keng Hsieh, 謝易耕
• Other Authors: 呂良鴻
• Format: Others
• Language: en_US
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/67772741354745851209

博士 === 國立臺灣大學 === 電子工程學研究所 === 104 === In this thesis, dual-mode and dual-band circuit techniques for CMOS automotive radar transmitter applications are developed. The first technique is motivated by facilitating the frequency planning of a novel 77-GHz FMCW transceiver architecture. By means of a 19-GHz integer-N phase-locked loop along with a frequency modulation loop, the required 19-GHz sinusoidal signal and 19–19.5 GHz FMCW frequency chirp can be generated simultaneously without excessive hardware overhead. The second technique targets on the concurrent operation for 22–29 GHz short-range pulse radar and 76–77 GHz long-range FMCW radar. Based on the previous signal generation concept, the required K-band sinusoidal carrier and W-band FMCW frequency chirp can be provided simultaneously. Besides signal generators, a novel 24/77-GHz dual-band PA topology is presented. By exploring the optimal load impedance for both bands in a systematic manner, on-chip passive devices for the output matching network is effectively reused. As a result, a two-way power-combing scheme for dual-band operation is established. In addition, the bulky input matching networks of a 24-GHz and a 77-GHz PA are amalgamated into the same hardware by introducing MOS switches for reconfiguration.