| Spaceborne active phased array antennas are widely used in satellite communications,ground navigation,remote sensing monitoring and other fields due to their easy beam control,wide frequency band,multi-beam forming,and strong anti-interference ability.As the core component of the spaceborne active phased array antenna,the T/R component plays the role of electromagnetic wave emission and reception,and its performance directly affects the overall performance of the antenna.With the development of microwave circuits in the direction of high integration,low loss,miniaturization,and light weight,more stringent requirements are put forward for the electromagnetic design and structural design of T/R components,making the comprehensive design of structure and performance a research.Hot spot.For this reason,this paper takes the space-borne T/R module as the research object,and studies the influence mechanism of its structure and electrical performance and comprehensive optimization design issues.The main research contents of this paper are as follows:(1)Based on the actual model,the internal interconnection process structure and cavity structure of the spaceborne T/R components are mainly considered,and the microstrip line used in the internal microwave circuit is simplified,and a simplified parametric model of the spaceborne T/R component structure is established.Through the characteristic analysis of the space-borne T/R component interconnection process structure and cavity structure,the main parameters and electrical performance indicators of the space-borne T/R component interconnection process model structure and cavity structure are clear.The microwave circuit in the model is simplified with a microstrip line,and the two parts of the input and output interconnection process structure and the cavity structure are retained.The spaceborne T/R component parameter model is established,and the model under the initial parameters is HFSS The electrical performance analysis and the service environment ANSYS structure analysis show that the return loss under the initial parameters of the parameterized model is-22.03 d B and the insertion loss is-0.14 d B,verifying the correctness of the simplified model established.(2)Taking the spaceborne T/R module input and output interconnection process structure and cavity structure as the object,the system has carried out the analysis of the mechanism of the influence of its structural parameters on the electrical performance,mainly including:· The uniform test table of the main parameters of the gold ribbon of the input and output interconnection process structure was designed,and the linear regression analysis was performed to obtain the correlation strength ranking of the main parameters of the gold ribbon and the electrical properties,and the key parameters were selected;based on the neural network algorithm,the key parameters of the gold ribbon and the The neural network prediction model between electrical properties provides a basis for analyzing the process structure of input-output interconnection and the mechanism of electrical properties.· Based on the input and output interconnection process structure and the electrical performance neural network prediction model,the mechanism analysis of the influence of the width of the gold ribbon,the span of the gold ribbon,the drop of the gold ribbon,and the length of the lead extension on the electrical performance of the input and output interconnection process structure are carried out respectively.The influence trend of the changes of different structural parameters on the electrical performance is discussed,which provides a basis for optimizing the structural parameters of the input-output interconnection process.· The analysis of the influence mechanism between the cavity structure parameters and the cavity resonance frequency,quality factor and isolation is carried out,and the influence of the cavity height,the thickness of the partition and the position of the partition on the cavity resonance frequency,quality factor and isolation is obtained.Relations,the preliminary value interval of each parameter is given,which provides a basis for optimizing the cavity structure parameters.(3)Based on the influence mechanism of the on-board T/R component input and output interconnection process structure and the cavity structure and the electrical performance,a comprehensive optimization method for the input and output interconnection process structure based on the improved particle swarm algorithm is proposed and based on Matlab and HFSS The cavity structure comprehensive optimization method of co-simulation realizes the comprehensive optimization design of the space-borne T/R components.First,with the electrical performance of the input-output interconnection process structure as the optimization objective,and the structural strength as the constraint condition,a mathematical optimization model of the input-output interconnection process structure parameters was established,combined with the improved particle swarm optimization algorithm,and a comprehensive optimization method for the input-output interconnection process structure was proposed.The optimization analysis of the input and output interconnection process structure of the on-board T/R component simplified model verifies the effectiveness of the comprehensive optimization method.Then combined with the improved particle swarm algorithm and HF-SS simulation analysis,a comprehensive optimization method based on the joint simulation of Matlab and HFSS was proposed,and the cavity structure of the space-borne T/R component simplified model was optimized,and the cavity was verified.Effectiveness of structural optimization methods.Finally,according to the integrated optimization results of the onboard T/R component input and output interconnection process structure and the cavity structure,the overall performance of the simplified model of the spaceborne T/R component is evaluated,and the comprehensively optimized return loss is-26.04 d B,which is reduced by 18.02% compared with the initial parameters,and the insertion loss is-0.12 d B,which is increased by 14.29% compared with the initial parameters,which realizes the comprehensive optimization design of the satellite-borne T/R components.(4)Based on the research basis of the influence mechanism and comprehensive optimization design on the structure and electrical performance of the spaceborne T/R module,in order to realize the process and automation of the comprehensive optimization design of the spaceborne T/R module structure,developed a comprehensive optimization design software for the satellite-borne T/R component structure and electrical performance.The software has broken through the ANSYS automated analysis technology,established C/C++ language HFSS secondary development function library,and realized the fast calculation and interconnection of the electrical performance of the on-board T/R component input and output interconnection process structure Comprehensive optimization analysis of process structure and cavity structure.Finally,a certain satellite-borne T/R component is used as an example to verify the effectiveness and practicability of the software. |
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