Compact UWB BPF using slotted resonator with an independently controllable notched band

摘要: In this paper, a novel compact ultra-wideband (UWB) bandpass filter (BPF) without and with one sharply notched band is presented. The UWB characteristic achieved using slotted resonators (SR) notch obtained by spiral defected ground structure (SDGS) any change in SR structure. Center frequency of the can be easily changed (from 5 to 9 GHz) tuning dimensions SDGS. To verify feasibility proposed filter, two BPFs, other band, at 8.0 GHz are developed fabricated, there suppressing spurious satellite-communication signal within passband. Measured results fabricated filters have advantages wide −3 dB bandwidth from 3.1 10.6 (which satisfies requirements US Federal Communication Commission -specified limits), size, low insertion loss (<0.6 dB), upper stopband high attenuation (−20 −50 dB).