A Novel Design of UWB BPF Using CSRR-DGS with Band-Rejection Performance Based on Coupled Wave Canceller SIR with High Skirt Selectivity

In this paper offers a novel design of ultra-wide band bandpass filter (UWB BPF) using complementary split ring resonators-defected ground structures (CSRR-DGS) with band rejection efficiency. The high skirt selectivity at both lower and higher cut-off frequencies and the great in-band performance are provided by employment of CSRR and H-shaped DGSs. Also, DGSs is used to enhance the out-of band efficiency of the filter. To create a rejection band in the UWB passband, to impede intervention with WLAN band, a stepped impedance resonator (SIR) is implemented adjacent to the low-pass section on wave cancellation method. Moreover, the suggested filter do not involve the use of via-holes which decreases the difficulty of the presented structure. The measurement results for the constructed filter are well consent with simulation results and shows that it complies well the requirements of the FCC with a band-rejection at 5.7 GHz.