Design Of The Conformal Array Antennas Borne On Cone And Cylinder Surfaces

This thesis is made with the scientific research projects.the research work is divided into two parts:the first part is the research of telemetry conformal array antenna and GPS conformal array antenna on specific cone stage, the engineering prototype has been done, the test results show very well and meet the design requirements, the engineering prototype is applied, the second part is the research of GPS conformal array antenna on specific cylinder stage, the engineering prototype has been done too, the test results show very well and meet the design requirements, the engineering prototype is applied.The main research works of this thesis are as following:Part one,the research of telemetry conformal array antenna and GPS conformal array antenna on specific cone stage.according to the technical requirements of antenna,combining to engineering application about GPS conformal array antenna and telemetry conformal antenna,this paper discusses the GPS system and the content of the telemetry system, and the developing track and research status of the conformal antenna are illustrated,the design scheme of the conformal antenna is demonstrated.The antennas are simulated by AnsoftHFSS,The simulation results show that the antenna working frequency to remote antenna is2.25GHz±8MHz,the GPS antenna is1.575GHz+3MHZ;VSWR<2;remote antenna is linear polarization; GPS antenna is right circular polarization;Antenna interface form is SMAKFD; Carrier platform is cone, and the diameter of up cone bottom is126mm, the diameter of down cone bottom is215mm, the length is240mm.According to the simulation results,the engineering prototype has been done and been measured,the results show that Voltage standing wave ratio, polarization mode,pattern,all of them meet the design requirements.Part two,the research of GPS conformal array antenna on specific cylinder stage,according to the technical requirements of antenna,we use microstrip and microstrip line feed to complete GPS conformal array antenna. As we know the theory of GPS conformal array antenna,we use AnsoftHFSS to simulate it.according to the simulated results, the prototype of antenna is fabricated,and then, we measure them. The measured results show that the antenna working frequency to GPS antenna is1.575GHz±2.5MHZ;VSWR≤2;GPS antenna is right circular polarization;Antenna interface form is SMAKFD;Carrier platform is cylinder, the diameter is118mm,the height is 100mm.According to the simulation results,the results show that Voltage standing wave ratio, polarization mode,pattern,all of them meet the design requirements.