IAES International Journal of Robotics and Automation (IJRA) Vol. 14, No. 1, March 2025, pp. 82~92 ISSN: 2722-2586, DOI: 10.11591/ijra.v14i1.pp82-92  82 Journal homepage: http://ijra.iaescore.com Enhancing efficiency and reliability in high-power microwave amplifiers: a novel circuit driver approach Ali Jebelli 1 , Nafiseh Lotfi 1 , Maral Partovibakhsh 2 , Arezoo Mahabadi 3 , Mohammad Saeid Zare 4 1 Department of Engineering and Design, Robotic Century Inc., Alberta, Edmonton, Canada 2 Department of Aerospace Engineering, Ryerson University, Toronto, Canada 3 Department of Basic Engineering Science, Tehran University, Tehran, Iran 4 Faculty of New Science and Technologies, Tehran University, Tehran, Iran Article Info ABSTRACT Article history: Received Jun 8, 2024 Revised Sep 23, 2024 Accepted Oct 6, 2024 This paper introduces an innovative circuit driver engineered to significantly enhance the efficiency and longevity of high-power microwave amplifiers, addressing critical limitations of traditional drivers in handling high-power systems. The proposed design features advanced voltage sequencing, which is crucial for extending component life and ensuring safe operation within the safe operating area (SOA). By integrating a sophisticated circuit board with real-time feedback sensors, controlled by a microcontroller, the system ensures continuous monitoring and rapid response to potential operational hazards. The driver automatically engages a fail-safe mode when thresholds are breached, prioritizing efficiency optimization and minimizing energy waste. Rigorous testing has confirmed the circuit driver’s capability to meet and exceed the stringent demands of high-power microwave amplifier applications. This work offers a robust, reliable solution that not only overcomes existing challenges but also sets a new standard for the performance and safety of microwave amplification systems, making it a valuable contribution to the field of power electronics. Keywords: Circuit optimization Driver circuits Gallium nitride Microwave amplifiers Power efficiency This is an open access article under the CC BY-SA license. Corresponding Author: Ali Jebelli Department of Engineering and Design, Robotic Century Inc. Alberta, Canada Email: ali.jebelli@ieee.org 1. INTRODUCTION The primary challenge addressed in this research is the inefficiency and reduced lifespan of high- power microwave amplifiers when using traditional driver circuits. Specifically, this study aims to address the issue of voltage sequencing, which critically impacts both the efficiency and the long-term reliability of these circuits. Our work proposes a novel circuit driver designed to tackle these problems by optimizing power control and improving the overall durability of microwave amplifiers. Microwave amplifiers play a crucial role in various industries, ranging from modern communication devices to precision measurement equipment [1]–[4]. With the advent of wireless communications, the demand for microwave amplifiers has increased critically, necessitating superior performance and cost- effectiveness [5]. Recent advancements also highlight the expanding applications of microwave technology in areas such as real-time monitoring systems for lubricant depletion on surfaces [6], the development of power amplifiers tailored for next-generation wireless systems [7], and high-temperature stable amplifier characteristics using gallium nitride (GaN) high electron mobility transistors (HEMTs) on advanced substrates for enhanced performance [8]. Additionally, innovations in multi-harmonic tuned power amplifiers for S-band frequencies are paving the way for improved performance in 5G applications [9]. The rapid