Abstract: A novel stub equalizer is presented based on LTCC(给出全称) technology. The resonator is placed in the middle layer of the substrate, parallel with the main transmission line. Compared to the conventional equalizer, the volume is greatly reduced in the design, especially in the low frequency equalizer design. The simulation results show that the equalizer has good results with the insertion loss less than 1.6dB at 18 GHz, equalized value about 10dB, input and output return loss better than -16dB at 6-18GHz band, respectively.