Ultra-widwband CMOS Low Noise Amplifier
Date Issued
2006
Date
2006
Author(s)
Huang, Yao-I
DOI
zh-TW
Abstract
Ultra-wideband (UWB) radio is a new wireless technology that can be used for high-speed data transmission at low cost with relative power. One of the most critical components in an UWB radio system is the front-end low-noise amplifier (LNA) because it needs to provide low noise figure (~3 dB) and high gain (~20 dB) over a very broad frequency range. It is a new and difficult challenge to design an usable broadband low- noise amplifier for UWB transceiver.
This thesis presents the systematic design approaches to realizing a low-noise amplifier over a wide operation frequency range. The resistor shunt-feedback is used to constitute the broadband matching conditions for both noise and gain performance. The network synthesis is an approach of realizing broadband matching network by designing a bandpass filter. The gain compensation technique is applied on the interstage network to provide compensation for the gain roll-off of the active devices. A fully-integrated 3.0-7.5 GHz UWB low-noise amplifier is implemented using UMC 0.18μm CMOS technology. The measured noise figure is lower than 3.8 dB from 3.1 to 7.5 GHz. Operated on a 1.8V supply, the LNA delivers 19dB power gain and dissipates 32mW of power.
Subjects
寬頻低雜訊放大器
網路合成
增益補償理論
負回授
Broadband LNA
Network Synthesis
Gain compensation theory
Feedback
Type
thesis
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