Design of an LNA based on SiGe HBT Technology for the Beam Position Monitor of Particle Accelerators

In the field of high-energy physics, the precise monitoring of particle beam position is crucial for the efficient operation and control of particle accelerators. This thesis focuses on the design and optimization of a Low-Noise Amplifier (LNA) in Silicon-Germanium Heterojunction Bipolar Transistor (SiGe HBT) technology for the Beam Position Monitor (BPM) system employed in the Proton Synchrotron (PS) particle accelerator at CERN. The objective of this research is to develop a high-performance LNA possibly exceeding the specifications of the operational one, designed more than 25 years ago. The initial stages of the thesis involve a comprehensive review of relevant literature, focusing on the principles of accelerator technology, beam position monitor, and the fundamentals of Low-Noise Amplifier design. Building upon this foundation, the SiGe HBT technology is explored for its suitability in the demanding environment of a particle accelerator, considering factors such as noise performance, linearity and operating frequency range. The design methodology encompasses various stages, including device modeling, circuit simulation, layout implementation, PCB production and laboratory tests. Utilizing industry-standard simulation tools, such as LTspice and AWR Microwave Office, the LNA circuit is optimized for minimum noise figure, maximum gain, and optimal impedance matching. Additionally, filtering and feedback techniques are employed to improve the overall performance of the amplifier. The outcomes of this research could contribute to the advancement of accelerator technology, specifically in the domain of beam position monitoring. The aim for the developed LNA design is to improve sensitivity and dynamic range of the CERN PS BPM system and, possibly, improve the control and exploitation of the particle accelerator.