A novel highpass filter based on complementary split ring resonators

A novel highpass filter based on complementary split ring resonator (CSRR) is presented, the HPF has two-staged resonators, each resonator is obtained by improving traditional CSRR into rectangle-shaped CSRR. Equivalent circuit of CSRR will be studied in the paper and the HPF will be simulated in HFSS and measured. The HPF has a compact size of 7mm*10mm, its passband covers from 7GHz to 22GHz with an insert loss less than 2dB, the rejection below 6GHz is more than 30dB, which means this HPF has a sharp edge. Simulation results in HFSS and measurement results are greatly matched.