A Gysel Power Combiner Design for High Power Applications

Abstract

In this study, a 2-way Gysel power combiner with 2.45 GHz center frequency and 15% bandwidth was designed for use in high-frequency high-power applications, circuit and electromagnetic simulations were made and the results were compared. Then the circuit was implemented and the measurement results were given. The simulations were made with AWR Microwave Office. Rogers RT5870 was chosen as the dielectric substrate which has 2.33 dielectric constant, 0.787 mm dielectric thickness, 35..m copper thickness and 0.0005 loss tangent. According to the simulation results, Gysel power combiner has a maximum power loss of 0.1 dB, maximum 0.1 dB amplitude unbalance, maximum 1 degree phase imbalance across the 2.3-2.6 GHz band. Since the layouts of microstrip lines were created by paying attention to high frequency design principles, no significant difference was observed in the circuit and electromagnetic simulation results. When the actual circuit was measured, the results of maximum 0.2 dB power loss across the 2.3-2.6 GHz band, maximum 0.1 dB amplitude imbalance between the inputs, maximum 1 degree phase imbalance results were obtained.