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Wideband 1-30 GHz Low Noise Amplifier Design with Input Impedance Matching Circuit

Zare Hosseinabadi, Mohammad | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56429 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Fakharzadeh Jahromi, Mohammad
  7. Abstract:
  8. With the expansion of wireless communication technology and the advent of the fifth generation of mobile communication, there is a growing need for broadband systems. Consequently, RF engineers are currently focusing their attention on broadband transceiver systems. The low noise amplifier (LNA) is a critical component in the receiver of a telecommunication system. In this research, the design of a broadband LNA in the K and Ka frequency band (18 ~ 40 GHz) is presented. The main challenge in designing a broadband LNA lies in achieving simultaneous power matching and noise matching through the input impedance matching network. Various types of broadband impedance matching networks have been investigated to address this challenge. Inductive peaking methods have also been introduced to increase the bandwidth. Additionally, a reference current source has been developed for biasing the amplifiers. The research introduces two LNAs: LNA1 and LNA2. LNA1 aims to achieve a low noise figure, while LNA2 focuses on reducing power consumption. Both amplifiers are designed using 65nm CMOS LP technology. LNA1 consists of three stages, including two common source stages and one cascode stage. It provides an effective bandwidth of 17 ~ 42.3 GHz with a noise figure ranging from 2.67 to 3.64 dB within that range. At 30 GHz, LNA1 has an IIP3 of -16.5 dBm and a power consumption of 22.5 mW. The maximum power gain of LNA1 is 22.6 dB. LNA2 comprises two stages: a cascode stage and a current reuse stage. It offers an effective bandwidth of 18 ~ 40.4 GHz with a noise figure ranging from 3.7 to 4.3 dB within that range. At 30 GHz, LNA2 exhibits an IIP3 of -13 dBm and consumes 9.9 mW of power. The maximum power gain of LNA2 is 22.5 dB. Furthermore, electromagnetic simulation was conducted to analyze the inductors and transformers used in the LNAs' design. The obtained electromagnetic model was incorporated into the LNA designs
  9. Keywords:
  10. Low Noise Amplifier (LNA) ; Millimeter Wave Circuits ; Input Impedance Matching ; Noise Matching ; Power Matching ; Broadband Circuits

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