气垫平台天线间隔离度分析研究

气垫平台上装备了大量的电子、电气设备和大功率发射天线,同时,气垫平台的船体与一般舰船相比,在垫态航行时艇体与海水绝缘,电磁兼容十分特殊。天线之间的耦合是无线电系统间电磁干扰的主要传输途径,天线隔离度是分析天线间电磁干扰影响的关键指标,开展天线间隔离度分析对电磁干扰研究十分重要。针对气垫平台船体的特殊性和电磁兼容性特点,基于电磁仿真基本原理,建立了气垫平台电磁模型,采用电磁仿真方法分析计算了天线间隔离度,并分析了气垫平台与海平面连接和不连接时隔离度影响。通过实测进行了验证,为开展总体电磁兼容工程研制提供了技术支撑。

Analysis of antenna isolation on hovercraft platform

A mass of electronic and electric equipment as well as transmitting antennas are installed on a hovercraft.Since the main body of the hovercraft is insulated to the sea surface,the EMC of this platform is different from other ships.The coupling between antennas is the main contribution of the EMI between wireless systems,and it is also the key indicator to describe the EMI effects of the antennas.As a result,analysis of antenna isolation,an indicator developed and employed to investigate the coupling between antennas,plays a key role in the EMI research.In this paper,the EM model of a hovercraft is established according to its EMC characteristics together with the basic EM theory.Then,the antenna isolation is calculated using MoM,and validated by the measured data.Besides,the effect of the connection between the hovercraft platform and the sea surface is also studied.Some useful conclusions are drawn,providing help for the EMI control in the EMC engineer.