Research On The Technology Of Compound Antenna With Multiple Radiation Elements

The main content of this paper is the research on the technology of compound antenna with multiple radiation elements.Three kinds of multi-radiation element composite antennas are designed,including two printed dual-arm spiral antennas and a multi-radiation element planar spiral array antenna.Based on the requirements,a variety of design methods are studied,and some miniaturization design schemes of multi-radiation unit antennas are applied.At the same time,taking into account the design cost,some low-cost and high-performance array design schemes are proposed.The following is a detailed description of the design:An omnidirectional circularly polarized dual-band antenna is proposed to meet the positioning requirements of UAV platform GPS.The antenna needs to work in the GPS L1 band and L2 band.The design principle of the dual-band spiral antenna is studied,and the size and miniaturization of the antenna is studied according to the requirements of UAV miniaturization and lightweight.Because the antenna also has the characteristics of circular polarization and omni-directivity,it is necessary to select the appropriate antenna structure and optimize the antenna structure to meet the expected requirements.Based on the characteristics of dual-band GPS spiral antenna,the corresponding feed network is designed and studied.Because the above designed antenna is a multi-radiation element antenna,each radiation unit needs to be fed separately,and the amplitude and phase difference of the feed have a decisive influence on the overall radiation performance and radiation model of the antenna.therefore,it is necessary to design a suitable feed network according to the actual situation and requirements,including the research of phase shifter and power divider.Based on the above research,a composite antenna of GPS positioning and telemetry communication is studied and designed.Through the research and improvement of the dual-band GPS spiral antenna,a multi-functional composite spiral antenna is designed,the composite scheme of the two antennas is studied,the compatibility of the antenna is improved,and the functions of the two antennas are realized in one module.The array element design scheme of the multi-radiation element array antenna is determined according to the index requirements.The structural model suitable for the directional antenna is studied,and the influence of the change of structural parameters on the performance of the antenna is analyzed,and the final array element structure is determined by optimization design.The research of multi-radiation element array is carried out on the basis of the above elements.The design principle of the array antenna is analyzed,and the antenna array mode is studied,and the uniform area array is analyzed.In addition,it is necessary to study the power division network of the antenna array,design an appropriate power division network to meet the feed requirements of the array,and finally process and test the real object.