Design of LNA for UWB and Low Power Mixer for UWB and Ku-band systems

Autor: CHEN,ZHI-XIANG, 陳志翔
Rok vydání: 2019
Druh dokumentu: 學位論文 ; thesis
Popis: 107
This thesis focuses on the research of UWB and Ku-Band systems RF front-end circuit. The design target is to implement key low noise amplifier, down-converter mixer, and up-converter mixer. The three results are summarized as follows: Firstly, this study presents a wideband LNA chip covering the frequency range from 3.1 GHz to 10 GHz using UMC 0.18 μm CMOS technology. The linearity can be improved by using multiple-gated-transistors (MGTR) topology. The LNA uses the current reuse architecture so that the power consumption can be reduced. The measured gain is 10.1 ~14 dB. The Input third-order intercept point (IIP3) is 0 ~11 dBm. The minimum noise figure is 4.6 dB. The dc power consumption of this LNA is 18 mW from a 1.5 V supply voltage. The total chip size for the LNA is 1.183×1.196 mm2. Secondly, this study presents a low power down-conversion mixer chip covering the frequency range from 7 GHz to 17 GHz using TSMC 0.18 μm CMOS technology. The architecture used is based on Gilbert cell mixer. This mixer switch stage uses a cascode architecture to increase the curren. The Body effect is used to reduce the turn-on voltage to increase conversion gain and reduce dc power consumption. The measured conversion gain is 4.8 ~7.8 dB. The input third-order intercept point (IIP3) is -11~5 dBm. The dc power consumption is 3.48 mW from a 0.9 V supply voltage. The total chip size for the mixer is 1.099×1.175 mm2. Thirdly, this study presents a wideband up-converter mixers with frequency range from 3 GHz to 16 GHz using TSMC 0.18 μm CMOS technology. In the transconductance stage, we use a modified two common source architecture to amplify the IF signal. The Body effect is used to reduce the turn-on voltage and dc power consumption. The measured conversion gain is 11.98 dB~14.47 dB. The input third-order intercept point (IIP3) is -8 dBm~-3.5 dBm. The dc power consumption is 4 mW from a 0.8 V supply voltage. The total chip size for the mixer is 1.09×1.2 mm2.
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