The Combined Simulation Of Multi Antenna Coupling On The Platform

With the rapid development of modern wireless communication technology, All kinds of radio communication system are developing toward multi-function and integration direction, which make that be necessary to add more antennas on a limited platform. So integrative antenna-platform modeling and analyzing, and electromagnetic compatibility analyzing between the antennas become very important. When analyzing some electrically large targets, the traditional method of moments takes a long calculation time, and can’t meet the requirements of engineering application. In this paper, based on the multilevel fast multi-pole algorithm, some work is done on efficient analysis of electrically complex large platform. In the past, the analysis of antennas is done without considering the antenna feed network. But the performance of the feed network have a very direct impact on the performance of the antenna system. Therefore, this paper presents a method of field circuit combination, analyzing the electromagnetic modeling of integrative antenna-platform, after considering the real effects on the antenna feed network.According the coupling analysis among the multiple antennas on the platform, this paper presents the analysis model of coupling, and gives the typical calculation examples to illustrate the whole process of the integrative platform-antenna electromagnetic modeling, electromagnetic radiation characteristics parameters of the antenna are obtained on the platform, including the directivity, gain and input impedance and so on. Through the comparison with the commercial software, to verify the correctness of the integration of electromagnetic modeling method in this paper. Through the analysis of the proposed model of coupling, the coupling between antennas is calculated. A simple analysis of the cause of influence on the coupling, can help to Engineering analysis of Electromagnetic Compatibility.Aiming at the problem of array antennas simulation with feed network, The method of field circuit combination is proposed and used in this paper, namely for complex feed network the method of circuit is used to extract parameters, for antennas and platform the multilevel fast multi-pole algorithm(MLFMA) based on integral equation is used for full wave numerical calculation, and then through the combination modeling based on Thevenin’s theorem, electromagnetic radiation characteristics of array antenna is obtained by considering the influence of the feed network. Through the comparison with the commercial software, to prove the correctness of the method and program.The method is used in vehicles and ships and other complex electrically large size model. The results of correlation analysis showed that, the research work of this paper provides an effective means for the efficient analysis targets in complex electrically large platform, and has certain reference significance to the actual project application.