| Summary: | 碩士 === 長榮大學 === 經營管理研究所 === 97 === The low noise amplifiers (LNA’s) are essential components in communication system front end in wireless local area networks (LAN’s), satellite links, and radiometric sensors. It dominates the noise figure and input voltage standing-wave ratio (VSWR) of the overall system because the first block signal fed from the antenna is the LNA. On the other hand, ultra-wideband amplifiers are widely used as baseband amplifiers in high-speed lightwave systems and gain blocks in microwave/millimeter-wave communication and sensor systems or in wideband instruments.
In this design, it employed the TSMC 0.35um SiGe process to design a Current Reuse low noise amplifier, for applications of the wideband system, such as WiMAX, Ultra wideband(UWB), and etc. The results demonstrate the performances of the proposed design following as: The total power consumption is 19.99 mW under 3.3V supply voltage, The maximum power gain of 17.85dB for 2 - 11 GHz wideband frequency and the gain flatness is less than ±0.905dB in band, minimum noise figure of 2.26dB, the IIP3 of -11 dBm, and the P1dB of -20.2 dBm. This design has obtained tapeout permission from National Chip Implementation Center (CIC) and gone into fabrication process already.
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