Publication Date


Document Type


First Advisor

Tahernezhadi, Mansour

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Electrical Engineering


Beam Position Monitoring (BPM) systems are utilized extensively in particle accelerator facilities as a diagnostic tool to ascertain quantitative aspects of an accelerated charge-beam such as spatial position and intensity of the beam as it is accelerated to greater velocities and levels of kinetic energy within said accelerating machine. A critical aspect of a BPM system is the Radio Frequency Front End (RFFE) electronic circuitry that receives the incoming raw BPM signal and performs signal-conditioning such that its frequency spectrum is transformed from radio frequency (RF) to non-RF and digitization of the transformed signal by downstream components can successfully occur. While front-end implementations such as RF heterodyne receivers or peak-detectors are commonly used to transform the incoming signal into digitizable form, a front-end implementation is proposed and investigated in this study that utilizes a three-stage active filter consisting of a bi-junction-transistor in common-emitter configuration to amplify the incoming signal and a standard LC bandpass-filter to filter and elongate it so that digitization of it by downstream Sample And Hold (SAH) and Analog To Digital Converter (ADC) components can successfully occur.


119 pages




Northern Illinois University

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