Design of notch ultra-wideband antenna with new oval CRSS structure

The paper has achieved a more efficient narrow-band filter for multi-notch ultra-wideband antenna in the case of international spectrum resource constraints. The paper is improving to the original design multi-notch ultra-wideband antenna. The way of coplanar-waveguide (CPW) coupled-fed have achieved band widening. The antenna has a large bandwidth covering the frequency band from 2.4GHz∼15.1GHz with return loss larger than 10dB. There is the improved elliptical CSRR (complementary split-ring resonator) structure on the radiation patch of a wine glass shaped ultra-wideband antenna, which have achieved notch features ultra-wideband antenna. The new antenna has finished band rejection in WLAN uplink and downlink frequency bands, and exhibited excellent filtering characteristic. Multi-notch is implemented in 5.06GHz to 5.46GHZ, 5.72GHz ∼ 6.22GHZ. at the same time avoiding interference the part of the C-band satellite communications downlink frequency band in 5.9GHz ∼ 6.425 GHz. The design of multi-notch ultra-wideband antenna has a good omni-directional radiation in their workspace.