Analysis of low noise amplifier design for microwave breast cancer imaging application

Khairul Zaman, Naili Khairina (2024) Analysis of low noise amplifier design for microwave breast cancer imaging application. Project Report. Melaka, Malaysia, Universiti Teknikal Malaysia Melaka. (Submitted)

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Abstract

Radar-based microwave breast cancer imaging is a non-invasive, radiation-free method for early detection of breast cancer. It uses microwave signals to create images of breast tissue, identifying tumours and abnormalities. However, the existing system lacking on sensitivity, accuracy and high noise due to weak microwave signal from antenna which will create low-quality image of tumour. This project aims to design a low-noise amplifier with analysis & verify the simulation performance of designed LNA using Advanced Design System (ADS) software with expected result are in frequency of 1.5GHz. The analysis is based on single stage and two-stage(cascade) design with different transistor technology and matching network comparison which is stub and L-matching. The pHEMT MGA-684P8 and Silicon (Si) AT-42086 were used to design and simulate the LNA by connecting two-port network transistor with input/output matching network and DC biasing network. The cascaded design of transistor AT-42086 perform a better result in noise figure which is 0.082 dB(L-matching) and 0.061 dB(stub) meanwhile the gain achieved 45.165 dB in both matching techniques. This project has a potential application in the field of medical imaging to provide a non-invasive method for breast cancer detection.

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