Optimization Design Of RTK Device Structure Based On CST And Finite Element Technology

With the rapid development of satellite positioning system(GPS),RTK real-time Kinematic(RTK)measurement technology has been widely used in various industries,and has created more and more social value and economic benefits for the society.Therefore,the research of high-end satellite positioning electronic products such as RTK equipment has been paid more attention by the industry.RTK equipment is often affected by various environmental factors,especially mechanical stress,shock vibration and signal interference.These factors will affect the functional quality and measurement accuracy of RTK equipment to varying degrees.But reasonable structure can weaken the negative effects of mechanical stress and shock vibration,and can also improve the signal-to-noise ratio of RTK equipment.In this paper,according to the working environment of RTK equipment,the structure design optimization of CST electromagnetic simulation and finite element simulation is carried out for RTK equipment from Radiation performance from GNSS Antenna signal,modal natural frequency and explicit dynamics.Firstly,the theory of structure optimization and the structure of RTK are introduced in detail,the 3D model of RTK equipment is established,and the structural and functional components of RTK equipment are divided.Then,the electromagnetic simulation of GNSS antenna is carried out through CST software.The optimized GNSS antenna can guarantee gain greater than 5 d B in the whole carrier carrier L 1 and L 2)range.It has good axial ratio and right-handed circular polarization performance,meets the requirements of the industry,and realizes the lightweight design.Then the modal analysis and random vibration analysis of printed circuit board and its assembly are carried out by using finite element technology.The vibration resistance of printed circuit board and its assembly is studied by means of multi-objective optimization theory,such as thickness,reinforcement and thread hole.a comprehensive optimization scheme is proposed.The optimized printed circuit board can completely meet the vibration frequency required by the industry.Finally,the modal analysis of the RTK shell is carriedout,and the explicit dynamics of the RTK equipment is studied.The shell is optimized from the original split type to an integrated one,and the lightweight design of the shell is realized by combining the selection of materials.The explicit dynamic research results show that the RTK equipment can resist the industry standard 2m drop impact.