典型海况下浮标天线辐射性能分析

发布时间：2018-08-22 11:31

【摘要】：在海洋应急救援中,应急无线电示位标(EPIRB)主要担负向海事卫星发送救援位置信息,全球定位系统(GPS)担负定位,雷达搜救应答器(SART)主要担负向救援船舶和飞机发送测向和距离信息的重要功能。在不同海况下,特别是在恶劣海况下,其天线性能参数的优劣直接关系到救援的成功率和及时性,因此研究具有重要意义。本文根据浮标在典型海况下的实际存在的问题,主要做了一下工作:首先,由于天线在海面环境下长时间存放和工作,受到风、雨、雪、曝晒、盐、雾霾、海水等有害因素的侵袭,需要在天线外部加装天线罩,分析了天线罩材质、外形、厚度3种因素对3种天线的辐射的影响。然后,根据流体力学原理和PM海浪谱,分析了海浪作用下的浮标在垂直方向上的纵摇运动过程,根据PM海浪谱生成模拟海面的三维图形,利用高频近似法对在典型高度和典型海况下的3种浮标天线进行仿真,得出了天线的方向图,进而分析不同海况下天线放置高度对辐射有效性的影响。最后,分析了海浪作用下的浮标在水平方向上的横摇运动过程,同样利用高频近似法分析了对在典型高度、典型倾角和典型级海况下的3种浮标天线进行仿真,得出了天线的方向图,进一步可分析倾角对辐射有效性的影响。
[Abstract]:In marine emergency rescue, the emergency radio beacon (EPIRB) is mainly responsible for sending rescue location information to Inmarsat, and the Global Positioning system (GPS) is responsible for positioning. Radar search and rescue transponder (SART) plays an important role in sending direction and range information to rescue ships and aircraft. Under different sea conditions, especially in bad sea conditions, the antenna performance parameters are directly related to the success rate and timeliness of rescue, so the research is of great significance. Based on the practical problems of buoys in typical sea conditions, this paper mainly does some work: firstly, because the antenna is stored and worked for a long time in the sea surface environment, it is exposed to wind, rain, snow, exposure, salt and, haze,. It is necessary to install radome on the exterior of the antenna due to the invasion of sea water. The effects of three factors, such as the material, shape and thickness of the radome, on the radiation of the three kinds of antennas are analyzed. Then, according to the hydrodynamics principle and PM wave spectrum, the pitching motion process of buoy under the action of wave is analyzed. According to PM wave spectrum, the three-dimensional pattern of simulated sea surface is generated. The high frequency approximation method is used to simulate three kinds of buoy antennas at typical altitude and typical sea condition. The pattern of antenna is obtained and the effect of antenna height on radiation efficiency is analyzed under different sea conditions. Finally, the rolling motion process of buoy in horizontal direction under the action of ocean wave is analyzed, and the simulation of three kinds of buoy antennas at typical height, typical dip angle and typical level sea condition is also analyzed by using the high frequency approximation method. The pattern of antenna is obtained, and the effect of dip angle on radiation efficiency can be further analyzed.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN820

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