Published Paper Details:

This study explores advanced power combining and dividing techniques essential for high-power satellite communication. Techniques like corporate, radial, spatial, and serial are examined, emphasizing the evolution of Solid State Power Amplifiers (SSPAs) using GaAs FETs and GaN technology. SSPA advancements have led to increased power, broad bandwidth, high linearity, efficiency, and reduced size. Challenges in high-power device design, including heat dissipation and limited chip space, are discussed. The paper compares SSPAs with Traveling Wave Tubes (TWTs), highlighting the former's preference for space applications due to lower costs and higher reliability. The need for low-cost, reliable, and efficient amplifiers drives the development of various power combining techniques. Microstrip couplers, integrated into RF circuits on a single substrate, are explored for their ease of integration. The study concludes by presenting a 3-dB wide-band branch line coupler design at 8.2 GHz in the X-band, focusing on bandwidth optimization and size minimization using Advanced Design Software (ADS).