Some Miniaturized Broadband Conformal Antennas Design

In order to achieve the purpose of miniaturization,high integration and broadband work for all kinds of airborne and missile borne radio equipment,the antenna,as an indispensable component,will gradually develop to miniaturization,broadband and conformal direction.This paper studies and designs a miniaturized conformal conformal antenna and a miniaturized ultra wideband conformal log periodic antenna,which is used for missile borne and airborne radio equipment,in which small broadband conformal antennas include U band miniaturized broadband conformal antenna,L/U band miniaturized broadband conformal antenna and L/U band miniaturized ultra-wideband conformal antenna.The first type antenna is a miniaturized broadband conformal tapered antenna.Starting with the technical requirements of actual engineering,a U band miniaturized wideband conformal antenna is designed first.A single cone antenna is used in the form of antenna index analysis antenna.The compact and conformal structure of single cone antenna is realized by using the top medium of laser radium carving technology to realize the miniaturization and conformal structure.Compared with the traditional top medium loading,the structure is guaranteed.The antenna's bandwidth is expanded at the same time,the antenna's input impedance and the influence on the VSWR are analyzed,and the broadband impedance matching in the antenna frequency band is realized.Finally,the antenna processing and measurement analysis are made.On the basis of the above antenna,the L/U band miniaturized wideband conformal antenna is designed,which is composed of five antenna antennas.By changing the structure of the antenna from the traditional single cone to the tapered single cone,the antenna bandwidth is expanded.Finally,the antenna parameters are determined by the antenna parameters analysis,and the processing days are also determined.The wire object is measured and analyzed.On the basis of the above two antennas,the L/U band miniaturized ultra wideband conformal antenna is designed.By analyzing the influence of the different placement position of the short circuiting section on the antenna's horizontal omnidirectional radiation performance,the location of the short circuit matching branch is determined.The ultra wideband work is realized by loading the medium at the bottom of the antenna to realize its ultra wideband work.Finally,the reference is based on the reference.The antenna related dimensions determined by the numerical analysis are processed and measured.The second kind of antenna is a miniaturized ultra wideband conformal log periodic antenna.According to the analysis of practical engineering indexes,the log form periodic antenna is adopted.In order to realize the miniaturization of the antenna,it is different from the traditional logarithmic periodic antenna triangle bend.The designed antenna oscillator uses curve bending to reduce the discontinuity at the bend,thus reducing the reflection of the current and optimizing the radiation performance of the antenna.The traditional log periodic antenna is a single polarized antenna.In order to achieve vertical polarization,the antenna is flexural in vertical direction in order to achieve vertical polarization,and the metallized through hole is realized in the project.The antenna conformal structure is achieved by conformal printing of antenna vibrators and streamlined dielectric plates by laser radium carving technology.Several small broadband and ultra wideband conformal antennas designed in this paper have achieved good performance,and have strong practical engineering significance.It provides a good idea for the design of other types of miniaturized wideband conformal antennas.