%0 Journal Article %T Systematic Approaches of UWB Low-Power CMOS LNA with Body Biased Technique %A Meng-Ting Hsu %A Kun-Long Wu %A Wen-Chen Chiu %J Wireless Engineering and Technology %P 61-77 %@ 2152-2308 %D 2015 %I Scientific Research Publishing %R 10.4236/wet.2015.63007 %X This paper presents research on a low power CMOS UWB LNA based on a cascoded common source and current-reused topology. A systematic approach for the design procedure from narrow band to UWB is developed and discussed in detail. The power reduction can be achieved by using body biased technique and current-reused topology. The optimum width of the major transistor device M₁ is determined by the power-constraint noise optimization with inner parasitic capacitance between the gate and source terminal. The derivation of the signal amplification S₂₁ by high frequency small signal model is displayed in the paper. The optimum design of the complete circuit was studied in a step by step analysis. The measurements results show that the proposed circuit has superior S₁₁, gain, noise figure, and power consumption. From the measured results, S₁₁ is lower than -12 dB, S₂₂ is lower than -10 dB and forward gain S₂₁ has an average value with 12 dB. The noise figure is from 4 to 5.7 dB within the whole band. The total power consumption of the proposed circuit including the output buffer is 4.6 mW with a supply voltage of 1 V. This work is implemented in a standard TSMC 0.18 ¦Ěm CMOS process technology. %K Body Bias %K Common Source %K Low Noise Amplifier (LNA) %K Low Power %K RFCMOS %K Ultra-Wideband (UWB) %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=58389