Design a low noise amplifier with a minimum
noise figure and high gain for a desired
Block Diagram Of LNA
Figure: Functional Block Diagram of LNA
Application Of LNA
Figure: Low Noise Amplifier application
Reference: A book in “Satellite Communication” by Dharma Raj Cheruku
Design of biasing networks (DC Biasing).
Designing LNA with ideal component.
Designing LNA with real component.
Input and Output Matching Network.
Figure: DC tracing with FET Biasing and its curve versus bias.
Designing LNA with ideal component
Figure: LNA with ideal component, input and output reflection coefficient with
Stability and Gain measurement.
Designing LNA with real component
Figure: Low Noise Amplifier with real component
Comparison when L= 1 and 0.3 nH
Figure: Stability and Gain when L=1 nH and 0.3 nH respectively
Input and Output Matching Network
Figure: Input and Output Matching Network
Overall Block of Low Noise Amplifier
Figure: LNA with input and output matching network
Noise and Gain Circle
Figure: Noise and Gain Circle
Stability of LNA
Figure: Stability measurement in entire range of LNA
Figure: Noise Figure
Figure: showing maximum and minimum gain
Figure: Input and Output Return Loss
Figure: Stability Region for 2 GHz frequency
Review of Previous Result
Rofougaran Et Al
K.S. and Thomas
F.B. Eric A.M kim
J.B. Seo. J H Kim
K.E. Art nd AH
Table: Previous Result of LNA parameters
There were three main goals:
Obtaining the correct S-parameters of the Agilent ATF54143 pHEMT over a wide frequency range.
Calculating the noise parameters of ATF-54143 at 1 GHz
to 3 GHz.
Improving the LNA design for better noise performance
and high gain.
Minimum Noise Figure is 0.7 dB and gain is 14 dB at 2.46
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