The design of microstrip gain equalizer in 2–6GHz

In this paper, a 2-6GHz microstrip wave gain equalizer is fulfilled on the basis of transmission line theory and resonant cavity theory. We choose microstrip resonator branch with thin film resistance integrated as the basic element. This structure could easily overcome the defects in traditional equalizer. Through numerous simulation experiments by ADS and HFSS (High Frequency System Simulator), we researched different factors that influenced the gain equalizer´s attenuation curve, and designed a gain equalizer with four branches. The simulated results show that the equalization curve meets requirements well. In addition, we took equalizer´s miniaturization requirement into consideration. The measurement results show that the gain equalizer is made by high-efficiency and precision way in this frequency range. And it is a universal method to design the gain equalizer.