Design and Analysis of 3.1-10.6 GHz UWB LNA and 24-GHz Low-Power High-Gain Receiver Front-End Circuit

• Main Authors: Chen, Wen-Sheng, 陳文生
• Other Authors: Wu, Lin-Kun
• Format: Others
• Language: en_US
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/76027471132284029500

碩士 === 國立交通大學 === 電信工程研究所 === 103 === This thesis consists of two parts. All the proposed circuits were implemented in TSMC 0.18μm mixed-signal/RF CMOS 1P6M technology. 　　Part I presents an ultra-wide band low-noise amplifier applied to WPAN (Wireless Personal Area Network.), and a common gate architecture and noise-cancelling technique are employed in this amplifier. Using these techniques can not only suppress the total noise contribution in the output but increase the total gain with an excellent input wideband matching. According to the measured results, the LNA achieves the small signal gain of 9.7~11.6 dB, a noise figure of 4.54~4.85 dB, the input P1dB of -19 dBm, and the input IP3 of -9.5 dBm over the whole working range. The power consumption is about 16.9 mW at the supply voltage of 1.8V. 　　Part II proposes a low-power high-gain receiver front-end applied to 24-GHz ISM band. The receiver front-end contains a low-noise amplifier, a transformer balun, a down-conversion mixer and an intermediate frequency amplifier. In LNA design, using two stage common source structure cascaded with common gate structure realizes performance of high gain and low-noise with the limited power dissipation; in down-conversion mixer design, making use of cross-coupling and current-bleeding techniques obtains high gain and low power consumption. Furthermore, an intermediate frequency amplifier is added after the down-conversion mixer so the whole conversion gain increases once more. Therefore, the proposed receiver front-end has advantage of low power and high gain compared to other researches. This circuit achieves a conversion gain of 37.1 dB and a double-side band noise figure of 5.65 dB with the input P1dB of -33.5 dBm, output P1dB of 2.1 dBm, and input IP3 of -23 dBm consuming 37.1 mW.