【作者】 贾学翠；

【导师】 栾秀珍；

【作者基本信息】 大连海事大学 ， 电子与通信工程， 2011， 硕士

【摘要】 本文是根据科研项目进行的选题研究,论文的任务是研究应用于矿井无线通信系统的赋形天线阵的设计和实现方法。矿井通信系统要求赋形天线阵具有体积小、重量轻、相对带宽为10%、最大扫描角达30°、增益达10dB的特性。微带天线具有重量轻、体积小、剖面低等优点,但普通的微带贴片天线的相对带宽约为5%,不能满足矿井通信系统工作的要求。为此,本文选用双层微带贴片结构设计天线阵元。根据微带天线基本设计方法对双层微带贴片天线进行了初步设计,在此基础上,利用Ansoft HFSS软件对天线进行了优化设计,使天线阵元的阻抗带宽(VSWR<1.5)达到了10%以上,能够满足赋形天线阵的要求。为了使天线具有较高的增益,同时使波束达到最大扫描角为30°的要求,本文以所设计的双层微带贴片天线作为阵元,采用理论计算与HFSS软件仿真相结合的方法,设计了一个四元线阵。仿真结果表明,该天线阵最大扫描角达到31°,增益为12.8dB,能够满足要求。本文采用Wilkinson功分器为天线阵设计馈电网络,根据Wilkinson功分器的基本设计方法,分别设计了等功分和功分比为2：1的一分二微带功分器。将等分、不等分功分器及微带延长线级联构成了整个馈电网络。本文还为所设计的天线阵设计了一款薄壁树脂玻璃钢天线罩。最后,利用HFSS软件对天线阵、馈电网络和天线罩作了联合仿真。在此基础上对整个天线阵系统进行了加工、测试,结果表明：天线阵的阻抗带宽(VSWR<1.5)为15%,增益为11.09dB,最大扫描角为31°,满足设计要求。更多还原

【Abstract】 The article is a selected topic research according to the scientific research item, the paper aim to design and realize a method of beamforming antenna array which applies in the mine pit communications system.The beamforming antenna array used in mine pit communication system should have characteristics of small size, light weight,10% of the relative bandwidth,30°of maximum aspect angles, lOdB of the gain.The microstrip antennas have some principal advantages, such as light weight, small size, low profile and so on. But the ordinary microstrip patch antenna’s relative bandwidth approximately is only about 5%, which cannot satisfy the mine pit communications system. Therefore, the article selects dual-layer microstrip patch structure as element of antenna array. Microstrip patch antenna is preliminarily designed according to the microstrip antennas basic design method. Based on this, the Ansoft HFSS software is used to optimize the antenna. The final result shows that the impedance bandwidth (VSWR<1.5) has reached up to 10% which satisfied the requests of the beamforming antenna.In order to achieve the requirements of high gain and the biggest aspect angles for 30°, the article used the dual-layer patch antenna as the element of the antenna array, combining the theoretical calculation and the HFSS software simulation, a four line array is designed. The simulation result indicated that the maximum aspect angle of this antenna array achieved 31°, the gain is 12.8dB, which can satisfy the request.This article has used the Wilkinson divider to design feed network for the antenna array, according to the basic design theory of Wilkinson divider, equal divider and 2:1 unequal microstrip divider have been designed respectively. The equal divider, unequal divider and microstrip extend line form the whole feed network.The article also has designed a thin radome made of plexiglass. Finally, simulated the antenna array, feed network and the antenna radome. Based on the result, the entire antenna system has been manufactured and tested as well. The measured result shows that the impedance bandwidth(VSWR<1.5)of the antenna array is 15%, the gain is 11.09dB, the maximum aspect angle is 31°, which satisfied the design requirement.更多还原