Research And Design Of Ultra-wideband Band-notch Antenna

Ultra-wideband(UWB)communication technology,because of its advantages of wide working frequency band,fast transmission speed,high efficiency,strong anti-multipath fading ability and stable working performance,is widely concerned by modern communications.However,in the UWB communication technology,there are more commercial narrowband communication in the operation frequency band,which causes in-band interference to UWB communication.Aiming at the noise interference of other commercial frequency bands in ultrawideband communication technology,this paper proposes three kinds of antennas:1.A compact UWB dual band-notch antenna is designed.to meet the requirement of antenna miniaturization in UWB communication system.The compact UWB double-notch antenna achieves the dual band-notch property of the UWB antenna by opening an inverted Lshaped slot and an arc slot on the circular radiation patch of the antenna.The antenna operation band in 3.0?10.9 GHz,and the band-notch is realized in 3.29-3.66 GHz and 5.04?5.91 GHz.2.Combining the antenna design with the artificial electromagnetic material technology,an ultra-wideband double-notch antenna based on the complementary split-ring resonator is set up.The antenna operation band at 3.0?11 GHz,and the double-band trap baud property of the antenna in 3.3-3.7 GHz and 5.14-5.85 GHz is realized by a pair of complementary open resonant rings.The omnidirectional radiation characteristics can be realized,and the radiation pattern is close to the dipole antenna.3.In order to cope with the different requirements of UWB communication system of the different environments,an UWB notch reconfigurable antenna was designed.By controlling the on-off state of two switching diodes,the band-notch reconfigurable antenna can switch between four modes,which can realize none band-notch,two single band-notch modes and one double band-notch mode in the frequency range of 3.1?10.6GHz.