Frequency Synthesizer for K-band Communication Systems

• Main Authors: Xue-Ru Hu, 胡學儒
• Other Authors: 楊清淵
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/42633230584519373918

碩士 === 國立中興大學 === 電機工程學系所 === 105 === Recently, the wireless communications are fast developing. In wireless communication systems, the high performance phase-locked loop (PLL) can provide a stable local oscillator (LO), exact frequencies, and channel switch function. In this case, the merger of a quadrature-voltage-controlled oscillator (QVCO) with a frequency tripler is designed for 24-GHz band. This thesis presents a 24-GHz frequency synthesizer implemented with 0.13um CMOS technology. In order to produce high speed output, the frequency tripler using a sub-harmonic mixer is applied at the output stage of the oscillator. The QVCO provides the quadrature fundamental signals which are fed into the frequency tripler for frequency mixing.