Research On Reflector Antenna Of Dipole Array Source

Airline secondary radar as an important monitoring tool for civil aviation,in the protection of civil aviation flight safety plays an important role,not only to protect the normal operation of the flight,but also enri ched the control means of command.In recent years,China's civil aviation industry has developed rapidly,the number of passenger transport increased year by year.In order to strengthen the protection of the rapid growth of the flights amount,ci vil aviation air traffic control system has introduced and build a number of sets of air t raffic control secondary radar surveillance system to achieve the full coverage of routes,routes,airspace to achieve multiple coverage.To achieve the goal of uninterrupted radar signal,as far as possible to avoid changes in the existing control of the situation,in order to reduce the impact of equipment problems on the control work to ensure that the flight work foolproof,so the radar equipment protection work put forward higher requirements.In the process of running,the secondary radar will have a series of problems such as reflection,loss of target,asynchronous interfer ence and so on.Therefore,in the face of the increasing amount of flights,it is neces sary to strengthen the understanding of radar system,especially need to strengt hen the technology The manual introduces less understanding of the antenna system.Under such circumstances,it is particularly important to strengthen the understanding of the radar system,and then effective and fast protection to t he airplane secondary radar is particularly important.Over the years,the equipment maintenance departmenair from traffic control system has been relying on foreign manufacturers equipment to carry out equipment maintenance,its content is simple,rough,only rely on determining the fault location,replacement spare parts,time-consuming and greatly increased the cost of equipment maintenance,so the original out of the emergency considerations for equipment security ideas,has been unable to meet the requirements of radar equipment protection?At the same time,with the increase in the maneuverability requirements of the radar,the antenna size also made a request.Based on the actual needs of the above and the analysis of the performance of the airplane secondary radar vertical large diameter antenna,Improve the degree of understanding of the airborne secondary radar antenna system,using the design of the dipole array feed structure.Combined with the foreign manufacturers to provide technical data,the use of CST simulation software to establi sh a dipole radiation column model.The antenna elements of different reflectors are compared and optimized.The factors influencing the characteristics of the antenna pattern are analyzed,and the antenna structure of the reflector is improved accordingly.Finally,a kind of dipole array feed reflex antenna suitable for civil aviation is proposed.From the simulation results,the antenna size,the main lobe gain and so on is superior to the existing dipole array column antenna,but the sidelobe gain is in terms of some deficiencies.The operating frequency of the antenna is 1060 MHz,the gain of the main lobe of the antenna is 29.5d B,the 3d B beam width is 3.2°,the 10 d B beam width is 5.69°,the 20 d B beam width is 7.27°.The vertical characteristic is near the zero elevation angle and has a cutoff rate of 6.52 d B / °.