For my group senior project, we were tasked with designing and building an FM transmitter. Link to full report below.

Abstract – The goal of this project is to develop a working FM transmitter that meets certain design specifications and functions well as a final, built product. Frequency modulation of a signal encodes information in a carrier wave by varying the instantaneous frequency of the wave. This project culminates in the successful construction of a working FM transmitter made from circuit components such as inductors, capacitors, resistors and transistors. The transmitter consists of an audio input in the form of an AUX cable, an oscillator circuit to generate the radio frequency signal, an amplifier stage to amplify the signal, and a radio frequency stage to modulate the signal to the correct FM band, and a varactor diode to match the impedance of the transmitter to the impedance of the antenna to efficiently transfer power and prevent the circuit from overheating. The finished transmitter’s success demonstrates the students’ proficiency in the subject matter which covers both circuit design and frequency modulation. The design of this transmitter within specific working characteristics mimics real-world requirements of electrical engineers where designs have certain goals and restrictions for the purpose they are intended for. Simulation, calculation, and real-world testing were all essential to the success of this project. Common design choices were made for a number of components in the design, but for others, calculation and simulation was essential in the selection of components to create a working final product.