Research On Beam Design Method Of Conformal Antenna Arrays

In the field of wireless communications,aerospace and so on makes the rapid development of its antenna is put forward to carry more and more high request,compared to traditional antenna conformal antennas,save installation space,reduce the radar scattering cross section(Radar Cross Section,RCS)can improve the stealth performance,increase the effective antenna aperture antenna gain advantages,such as applications in some special scenarios,conformal antenna radiation pattern need to meet the application requirement of a certain,however,the traditional beam informs method only applies to certain forms of antenna arrays,and informs the process is relatively complicated,takes up a lot of computing resources,for antenna arrays beam informs more inconvenience,In order to solve this problem,a beam synthesis method based on time inversion technology is studied in this thesis.This method is applicable to many kinds of antennas,and can realize the beam shape of any structure array in a certain frequency band,which brings great convenience to the beam shape of conformal antenna arrays.In this thesis,the basic theory of high order moment method and basic theory of time reversal beam synthesis method are introduced,through the method of planar arrays,cylindrical rules such as the design of the beam,the main beam of the array can be pointed in the expected direction,and the surface structure of the conformal antenna arrays in the aircraft wing is irregular,which can be studied as an example,the conformal antenna arrays in the airplane wings,for example,using the beam time inversion method for conformal arrays of forward and backward of main lobe beam accurate to within plus or minus 30°,and then further to the conformal antenna arrays and dielectric layer,such as skin full wing model structure,When the excitation of conformal antenna arrays is applied to the wing model,it can be found that the main lobe beam of the wing model accurately points to the corresponding Angle,and then the wing model is installed on both sides of the fuselage to build a complete aircraft model,and the expected effect can be obtained by using the same method.On the basis of the realization of single beam further introduces the multibeam superposition theory,is still in the airplane wings conformal antenna arrays,for example,the main lobe and sidelobe of inverse beam direction weighted to obtain a new set of incentives information ACTS on the conformal antenna arrays,the sidelobe level of the beam the desired requirements.The desired effect is also obtained by applying the new excitation to the wing model.It is proved that this method is feasible and provides a new method for beam design of conformal antenna arrays.