Design of wide band microstrip equalizer using spurline

A broad-band microstrip amplitude equalizer with spurline resonators is proposed. The resonator is composed of an open stub and a resistance. As a result of using this new structure, the equalizer not only supports broad-band performance with large equilibrium, but also exhibits an ultra-reduced size compared with the traditional microstrip equalizer. Through numerous simulation experiments by HFSS (High Frequency System Simulator), a broad-band (6 GHz∼18 GHz) equalizer has been designed, fabricated and measured. The measurement data generally matches well with the simulated results. It shows that this structure is an effective method of designing microstrip equalizer.