本文選題：無線電定位技術 + 地下信標�。� 參考：《西安電子科技大學》2014年碩士論文

【摘要】：無線電定位技術廣泛應用于交通運輸、導航、動物行為研究等方面。一般來說,原有的定位技術都是基于地面或空中目標的。主要利用的是電磁波在空氣中的傳播特性。然而對于某些特殊情形,地下目標也需要進行定位。例如,在靶場試驗中,炮彈往往由于巨大的慣性落入地下而難以尋找和定位。因而,對地下目標進行定位的研究具有重要理論意義和實際應用價值。地下目標定位涉及復雜的電波傳播過程,地下信標天線輻射的電磁波到達地面的途徑多樣化,包括表面波、側面波、折射波等。鑒于問題的復雜性,本文首先利用包含半空間界面的索莫菲積分解析法分析處于地面下方的偶極子在地面上方遠區(qū)場的輻射特性。研究其場值的變化規(guī)律,為半空間地下目標的定位奠定理論基礎。然后利用時域有限差分法(Finite Difference Time Domain,FDTD)研究平面分層時地下偶極天線的近場特征,進而研究有一定地形結構(例如斜坡、凸起、洼地等情形)地下偶極天線的輻射特性。通過對地下偶極天線場分布特點的分析,初步探討了地面下方帶信標目標的定位問題。
[Abstract]:Radio positioning technology is widely used in transportation, navigation, animal behavior research and so on. Generally speaking, the original positioning technology is based on the ground or air targets. The main use is the electromagnetic wave in the air propagation characteristics. However, for some special cases, underground targets also need to be located. For example, in range tests, projectiles are often difficult to locate and locate because of their huge inertia. Therefore, the study of underground target location has important theoretical significance and practical application value. Underground target location involves complex propagation of radio waves, and the electromagnetic waves radiated by underground beacon antennas reach the ground in a variety of ways, including surface waves, side waves, refraction waves and so on. In view of the complexity of the problem, in this paper, the radiation characteristics of a dipole under the ground in the far field above the ground are analyzed by means of the Sommerfeld integral analytic method including the half-space interface. The study of the variation law of the field value lays a theoretical foundation for the location of the underground target in half space. Then the near field characteristics of underground dipole antenna with plane stratification are studied by using finite difference time Domain FDTD (FDTD) method, and the radiation characteristics of underground dipole antenna with certain topographic structure (such as slopes, protrusions, depressions, etc.) are studied. Based on the analysis of the field distribution of the underground dipole antenna, the problem of locating the beacons under the ground is discussed preliminarily.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN820

【參考文獻】

相關碩士學位論文 前1條

1 李麗;靶場彈落點無線定位系統(tǒng)的研究[D];中北大學;2009年

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本文編號：2076807