Optimization design of negative group delay circuits based on improved PSO algorithm

摘要

Based on electromagnetic simulation and catfish particle swarm algorithm, a novel method is proposed to design the negative group delay circuit with defected structures. The optimization is developed to increase the efficiency and the accuracy, which is confirmed by the data before and after optimizations. The measured results show that at the frequencies of 5.7 and 7.0 GHz, the insertion loss values achieve −17dB and −7dB, respectively.