一种结合分形结构的极宽带单极子天线OA

To meet the integration demands of modern electronic information systems for diverse radio functions such as detection,communication,navigation and jamming,this paper presents the design of an Super-Wideband(SWB)monopole antenna.Based on an annular monopole structure,triangular elements are loaded and subjected to multiple iterations and slotting to extend the antenna's low-frequency operating bandwidth.To mitigate the impedance matching degradation at certain frequency points after iteration,a pair of inverted L-shaped parasitic elements are loaded on both sides of the microstrip line,while rectangular slots are introduced at the end of the feeding structure.Simulation results demonstrate that the antenna achieves an operating bandwidth of 0.8～30 GHz,corresponding to a fractional bandwidth of approximately 190%.The antenna attains a peak gain of 8.5 dBi,with the gain remaining above 0 dBi across the entire frequency band.This design significantly reduces system complexity in multi-antenna configurations while achieving multifunctional co-use within a single antenna system.