Single Sideband Mixer

Abstract

This thesis presents the design, fabrication, testing, and verification of a Single Sideband (SSB) mixer circuit composed of two Double Sideband (DSB) mixers, two 90-degree hybrids, and a Wilkinson. The study aimed to demonstrate the circuit's efficacy in modulating and demodulating RF signals with precise sideband suppression, laying the groundwork for advancements in RF communication technology. The circuit design was accomplished using NI MWO AWR software, leveraging its simulation capabilities to ensure optimal performance. The DSB mixers were strategically chosen to generate upper and lower sidebands, combined using 90-degree hybrids to attain the desired single-sideband modulation. A Wilkinson was integrated to ensure effective power distribution to the DSB mixers. The designed circuit was fabricated using a microstrip technology printed circuit board (PCB) substrate. The fabrication process involved milling and soldering techniques, ensuring precise component placement and interconnections. The testing involved utilizing VNA, Signal generators, and Spectrum analyzers to analyze the circuit's frequency and phase response, sideband suppression, and conversion efficiency. The experimental results validated the successful generation of single-sideband signals with a suppressed carrier and a single sideband, demonstrating the efficacy of the designed SSB mixer circuit. The insights gained from this project contribute to a deeper comprehension of SSB modulation techniques and practical RF circuit implementation.