Abstract-This paper presents the simulation and fabrication of a new power divider/combiner based on a new waveguide H-plane folded magic-T structure. Measurements of the fabricated magic-T confirm the accuracy of the optimization algorithms existing in the CST software (Genetic algorithm, Particle Swarm Optimization algorithm PSO etc.). The magic-T structure exhibits moderate bandwidth response in the frequency range of 8-10 GHz. Also, it shows that the return loss is better than −15 dB, the insertion loss about −3.4 dB, and the isolation between the two output ports better than −25 dB in the frequency range of 8.4-10 GHz, with good transmission phase characteristics. Based on this magic-T structure, a 1 : 4 power divider/combiner is simulated and tested. The measured results show that the insertion loss is about −6.5 ± 0.25 dB, the return loss less than −15 dB, the isolation among the output ports less than −25 dB, the combining efficiency about 89%, and the transmission phase differences are about ±2 • in the frequency range of 8-10 GHz.

Abstract-An eight-way waveguide-based power combiner/divider is presented and investigated in the frequency range 7.5-10.5 GHz. A simple approach is proposed for design purposes. The measured combiner shows a good agreement between the simulated and measured results. Insertion loss is about −0.3 dB, return loss is less than −15 dB and isolation between adjacent output ports is better than −11 dB at 8.5 GHz and reaches about −14 dB at 9.5 GHz.