基于介质加载SIW的H面喇叭天线及其阵列研究

【作者】 张兵；

【导师】 盛卫星； 王昊；

【作者基本信息】 南京理工大学 ， 信号与信息处理， 2009， 硕士

【摘要】 基片集成波导技术是近年来提出的一种插入损耗小、辐射低、功率容量高、集成于介质基片中的新型导波结构。矩形波导喇叭天线具有方向图对称、增益高等优点,本文采用基片集成波导技术实现了H面矩形喇叭天线,在喇叭口径处加载介质增加方向图在EH面的聚焦效果,从而提高增益。详细考察了介质块尺寸和形状对方向图的影响,发现介质块不仅可以在方向图的E面产生聚焦效果,而且能够矫正H面喇叭本身结构原因所造成的口径处的相位误差,从而增加H面产生聚焦效果。基于这一点同样口径尺寸的H面喇叭天线可以进一步缩小纵向长度。在取得较好的仿真结果之后进行了实物加工,测试的结果和仿真结果吻合较好。另外我们用基片集成波导H面介质加载喇叭天线作为天线阵元进行了单脉冲阵列的研究,用基片集成波导一维单脉冲比较网络作为馈电网络,取得了较好的仿真结果。又进一步设计了一个二维单脉冲比较网络,仿真结果符合预期。本文仿真结果皆采用Ansoft HFSSll仿真。更多还原

【Abstract】 Substrate integrated waveguide (SIW) technology is proposed in recent years. It has many advantages, like low insertion loss, low radiation, and high power capacity. The rectangular waveguide horn antennas were found many applications due to their excellent radiation properties such as symmetrical patterns, high gain, and easy fabrication. In the thesis substrate integrated waveguide technology was used to implement the H plane horn antenna. In front of the horn aperture, dielectric was loaded to improve the directivity of the antenna. The effect of dielectric block to the radiation pattern was inspected. The dielectric block makes the radiation pattern focus not only in E plane but also in H plan. In particular, the dielectric block can correct the phase error which caused by the structure of the horn antenna in H plane. Based on this, the length of the horn can be further decreased. The results from the simulation and those from the measurement are in good agreement.In addition, a one-dimensional SIW monopulse antenna array was developed and good simulation results were obtained. Furthermore a two-dimensional monopulse network was designed.In the thesis all of the simulation results are simulated by Ansoft HFSS11更多还原