超宽带检测天线的研究与设计
发布时间：2019-04-15 21:10
【摘要】：本文立足于民航上的实际应用,设计出一款具有超宽带性能的检测天线,其目的在于能够在飞机上实现对3G手机信号(2100MHz、1800MHz频段)、Wi-Fi信号(2.4GHz 和 5GHz 频段)、蓝牙(2.4GHz 频段)、WiMax(3.3GHz-3.7GHz频段)、及UWB通信频段(3.1GHz-9.3GHz)的检测及发现,避免这些民用通信频段对飞机飞行产生干扰,影响飞行安全。木文以实际需求为出发点,基于超宽带天线、陷波、天线小型化等相关理论,设计出了具有陷波特性、小型化的超宽带检测天线。最后对天线进行仿真和测试,结果满足实际要求。本文的主要内容如下:(1)首先,为了得到足够的工作带宽,本文采用共面波导技术设计了一个新型的超宽带圆形单极子天线,印刷在FR4介质板上,天线的整体尺寸为40mm*50mm,并用缺陷地结果改善了天线的阻抗匹配特性。通过HFSS软件对该天线进行了仿真,仿真结果表明该天线在2.1GHz-13.45GHz上具有很好的阻抗匹配特性,且天线在工作频段内具有很好的全向性,是一个全向型的天线。(2)为了更好地实现天线的检测功能,木文采用了分形结构,实现了对3G手机信号(1800MHz频段)的检测以及天线的小型化设计。使得天线在保持尺寸不变的条件下,工作带宽向低频段移动300MHz,最终实现了 1.8GHz-13.45GHz的工作带宽。(3)由于飞机上自身存在一定通信频段,例如飞机自带的无线电高度表(4.2-4.4GHz)和机载的气象雷达(9.33GHz、9.345GHz 和 9.375GHz)。为了排除飞机自身通信频段的干扰,更好的实现天线的检测性能,木文在单陷波天线的基础上,设计了一个双陷波天线,将飞机无线电高度表频段和机载气象雷达频率同时滤除掉,很好的解决了飞机自带无线电信号的干扰问题,并且没有增加系统的复杂性。
[Abstract]:Based on the practical application of civil aviation, this paper designs a detection antenna with ultra-wideband performance. The purpose of this antenna is to realize 3G mobile phone signal (2100MHz, 1800 MHz band), Wi-Fi signal (2.4GHz and 5GHz band) on aircraft. The detection and discovery of Bluetooth (2.4GHz band), WiMax (3.3GHz-3.7GHz band) and UWB communication frequency band (3.1GHz-9.3GHz) can avoid the interference of these civil communication bands to the flight of aircraft and affect the flight safety. Based on the theory of UWB antenna, notch and miniaturization, a miniaturized UWB detection antenna is designed in this paper. Finally, the antenna is simulated and tested, and the results meet the practical requirements. The main contents of this paper are as follows: (1) in order to obtain sufficient bandwidth, a novel ultra-wideband circular monopole antenna is designed by using coplanar waveguide technique, which is printed on a FR4 dielectric plate. The overall size of the antenna is 40 mm to 50 mm, and the impedance matching characteristics of the antenna are improved by the defect results. The antenna is simulated by HFSS software. The simulation results show that the antenna has a good impedance matching characteristic on 2.1GHz-13.45GHz, and the antenna has a good omnidirectivity in the operating frequency band. It is an omni-directional antenna. (2) in order to realize the detection function of the antenna better, the paper adopts fractal structure, realizes the detection of 3G mobile phone signal (1800MHz band) and the design of antenna miniaturization. Under the condition of keeping the size constant, the operating bandwidth of the antenna moves from 300MHz to low frequency band, and finally realizes the working bandwidth of 1.8GHz-13.45GHz. (3) there is a certain communication frequency band on the aircraft. Examples include the aircraft's own radio altimeter (4.2-4.4GHz) and airborne weather radar (9.33GHz, 9.345 GHz and 9.375GHz). In order to eliminate the interference of the aircraft's own communication frequency band and realize the detection performance of the antenna better, a double notch antenna is designed on the basis of the single notch antenna. The frequency band of aircraft radio altimeter and the frequency of airborne meteorological radar are filtered out at the same time, which solves the interference problem of aircraft's own radio signal, and does not increase the complexity of the system.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN822.8
[Abstract]:Based on the practical application of civil aviation, this paper designs a detection antenna with ultra-wideband performance. The purpose of this antenna is to realize 3G mobile phone signal (2100MHz, 1800 MHz band), Wi-Fi signal (2.4GHz and 5GHz band) on aircraft. The detection and discovery of Bluetooth (2.4GHz band), WiMax (3.3GHz-3.7GHz band) and UWB communication frequency band (3.1GHz-9.3GHz) can avoid the interference of these civil communication bands to the flight of aircraft and affect the flight safety. Based on the theory of UWB antenna, notch and miniaturization, a miniaturized UWB detection antenna is designed in this paper. Finally, the antenna is simulated and tested, and the results meet the practical requirements. The main contents of this paper are as follows: (1) in order to obtain sufficient bandwidth, a novel ultra-wideband circular monopole antenna is designed by using coplanar waveguide technique, which is printed on a FR4 dielectric plate. The overall size of the antenna is 40 mm to 50 mm, and the impedance matching characteristics of the antenna are improved by the defect results. The antenna is simulated by HFSS software. The simulation results show that the antenna has a good impedance matching characteristic on 2.1GHz-13.45GHz, and the antenna has a good omnidirectivity in the operating frequency band. It is an omni-directional antenna. (2) in order to realize the detection function of the antenna better, the paper adopts fractal structure, realizes the detection of 3G mobile phone signal (1800MHz band) and the design of antenna miniaturization. Under the condition of keeping the size constant, the operating bandwidth of the antenna moves from 300MHz to low frequency band, and finally realizes the working bandwidth of 1.8GHz-13.45GHz. (3) there is a certain communication frequency band on the aircraft. Examples include the aircraft's own radio altimeter (4.2-4.4GHz) and airborne weather radar (9.33GHz, 9.345 GHz and 9.375GHz). In order to eliminate the interference of the aircraft's own communication frequency band and realize the detection performance of the antenna better, a double notch antenna is designed on the basis of the single notch antenna. The frequency band of aircraft radio altimeter and the frequency of airborne meteorological radar are filtered out at the same time, which solves the interference problem of aircraft's own radio signal, and does not increase the complexity of the system.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN822.8
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