In this paper, we propose an improved adaptive frequency sweep strategy based on the asymptotic waveform evaluation (AWE) technique for simulating broadband antennas across a wide frequency range.Our approach maintains high accuracy compared to traditional frequency sweep methods, as demonstrated through simulation Inlet Valve Connector results of several commonly used broadband antennas.A novel error function is introduced specifically designed for broadband antenna simulation, which effectively improves the adaptive frequency sweep process.By analyzing the relationship between target error and computational time, we determine the optimal balance zone between Servo Motor Assembly efficiency and accuracy.Our findings provide valuable insights for efficient and accurate simulation of broadband antennas.