Henry Chen (Committee Member), Saiyu Ren (Advisor), Raymond Siferd (Committee Member)
Master of Science in Electrical Engineering (MSEE)
In this thesis, a reconfigurable dual band CMOS LNA with a switching-type circuit topology is proposed. The reconfigurable dual-band LNA can be tuned to operating fre- quency of either 1.575 GHz for global positioning system (GPS) or 2.4GHz for WLAN 802.11b standards. The simulated results performed power gain of 11.2 dB and 12.4 dB, noise figure of 3.4 dB and 2.9 dB, input return loss(S11) of -25.26 dB and-21.4 dB, third- order input intercept point of -3.12 dBm and -2.137 dBm and the design dissipates 8.9 mW and 4.68 mW of power at 1.2 V power supply at the two frequency bands 1.575 GHz and 2.4 GHz, respectively. A simple but efficient design methodology for a low noise amplifier is also presented in this thesis. This employs a design metric(cut off 'or' transit frequency, ft) to achieve optimum performance based on quick first order design space exploration. The simulated results for the two designs with input frequency of 2.4 GHz show power gain of 26 dB and 20.3 dB, and noise figure of 1.5 dB dB and 2.48 dB, an input return loss (S11) of -32.57 dB and -26.63 dB and the 1 dB compression point of -3.12 dBm and -2.137 dBm and the design dissipates 6 mW and 600 uW of power at 1.2 V power supply at the higher (24 GHz) and lower (5 GHz) transit frequencies, respectively.
Department or Program
Department of Electrical Engineering
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