| The scattering effect of Aircraft body may cause the antenna radiation pattern distortion.absorbing material that is coated on the body surface,which is intend to improve the concealment of plane.The space of antenna installation is very limited,and the Aircraft body usually have multiple antennas,then the interference between the antennas will affect the communication.In order to reduce the impact of the scatterer on the antenna radiation characteristics and ensure the normal performance of the antenna,and match a reasonable antenna position.Therefore,it is necessary to study the radiation characteristics of airborne antennas.The foreign and domestic scholars have done a lot of research at present.The foreign developed a variety of electromagnetic simulation software earlier,as well as aircraft modeling of electromagnetic simulation software,such as HARP.Most of the domestic simulation are only about the antenna or a simplified body and antenna integration simulation.In this paper,the antenna and the aircraft model are established accurately,and the influence of the body on its return loss characteristics,pattern characteristics,standing wave ratio and so on is studied with the oblique double overhead airborne communication antenna as an example.In this paper,the HFSS-IE solver of three-dimensional full-wave moment method(MOM)electromagnetic field integral equation(IE)algorithm is used to accurately model the high-frequency antenna of the airborne vertical tailfins.The band-shaped monopole antenna in the oblique double-cavern body is designed and simulated to match the 50 ohm input impedance and to determine the antenna size,and the antenna is operated at 108MHz-400 MHz and to reach the voltage standing wave ratio less than 3.On this basis,it is combined with the aircraft machine model for complex simulation calculation,analysis of the key components of the radiation field characteristics and the establishment of the body antenna integration model.The radiation characteristics of the antenna and the airborne antenna are compared,and the influence of the body on the radiation characteristics of the double vertical antenna is obtained.The result is the actual engineering standard of the ultrashort band antenna,and having practical guiding significance.The simulation results of the antenna reach the actual engineering standard of the ultrashort wave communication antenna. |
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