A miniaturized ultra-wideband antenna with five band notched characteristics is designed.By changing the notch structure parameters and analyzing the current distribution on the antenna surface,the influence of the notch structure on the ultra-wideband and notch characteristics is studied.The antenna size is only 25 mm × 20 mm × 1 mm.The radiation patch is composed of rectangular and circular patches,and the backplane achieves ultra-wideband characteristics by chamfering and slotting.The symmetrical hook-type branches are added and U-shaped grooves and three U-shaped grooves are etched to produce five band notched.The operating bandwidth of the antenna is 3.8～16 GHz.It effectively suppresses the interference of international satellite band(4.5～4.8 GHz),WLAN downlink band(5.15～5.35 GHz),UNII-2c(5.47～5.725 GHz),WLAN uplink band(5.725～5.825 GHz),downlink satellite system band(7.25～7.75 GHz),uplink satellite system band(7.9～8.4 GHz)and International Telecommunication Union band(8.01～8.50 GHz).The antenna is omnidirectional in the operating frequency band,and the average gain is above 4 dBi.The simulated and measured results are basically consistent,indicating that the antenna can be used in ultra-wideband communication systems.
关键词
超宽带天线/五陷波/U型槽/钩形枝节/全向性
Key words
ultra-wideband antenna/five band notched/U-shaped groove/hook-shaped branch/omnidirectional
维普
万方数据