全向双极化天线设计

发布时间：2018-03-17 10:34

本文选题：双极化天线　切入点：全向　出处：《西安电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着无线通信技术的快速发展，频率资源变得日益紧张，人们对无线通信的需求不再局限于简单的语音通讯，对流媒体信号的需求变得十分迫切。因此，利用有限的频谱资源提高信号的传输速度和质量具有重要意义。双极化天线能够有效提高频谱效率和缓解发射机与接收机之间的极化失配，，解决多径衰落问题。同时，双极化天线也可替代两个不同极化的天线单元，减少天线数量，降低整机成本。在移动遥测、室内定位、无线接入点和便携式移动基站等点对多点的小型化通信系统中，天线的辐射方向图应具有良好的全向性。因此，全向双极化天线具有广泛的应用前景。论文设计了两种小型化全向双极化天线，成功解决了空间受限无线通信系统天线设计的两个主要难题：一个是实现小尺寸天线在垂直/水平极化模式下的全向辐射问题；另一个是降低小尺寸天线两种极化的互耦问题。论文首先设计了一种工作于WLAN2.4GHz频段的紧凑型全向双极化高隔离度缝隙天线。该天线通过在金属地板上开两条正交缝隙，实现天线在两种极化状态下的全向辐射。该天线两种极化模式下增益均大于1.35dBi，端口隔离度高于35dB，其尺寸仅为0.4880×0.0810×0.0810；其次，针对低剖面无线通信系统，论文设计了一种工作于WLAN2.4GHz频段的低剖面全向双极化天线。该天线通过将两个极化正交的全向天线组合在一起，实现其在不同极化模式下的全向辐射。该天线两种极化模式下增益均大于0.44dBi，端口隔离度高于23.9dB，其整体尺寸只有0.630×0.630×0.0570。
[Abstract]:With the rapid development of wireless communication technology, the frequency resources become increasingly tight, people's demand for wireless communication is no longer limited to simple voice communication, and the demand for streaming media signal becomes very urgent. It is of great significance to improve the speed and quality of signal transmission by using limited spectrum resources. Dual polarization antenna can effectively improve spectrum efficiency, alleviate polarization mismatch between transmitter and receiver, and solve the problem of multipath fading. At the same time, dual polarization antenna can also replace two different polarization antenna units and reduce the number of antennas. Reduce the cost of the whole machine. In the miniaturized multipoint communication systems such as mobile telemetry, indoor positioning, wireless access point and portable mobile base station, the radiation pattern of the antenna should have good overall orientation. The omnidirectional dual polarization antenna has a wide application prospect. In this paper, two miniaturized omnidirectional dual-polarization antennas are designed, which successfully solve the two main problems in the antenna design of space-limited wireless communication systems: one is to realize the omnidirectional radiation of small size antennas in vertical / horizontal polarization mode; The other is to reduce the mutual coupling between the two kinds of polarization of the small size antenna. In this paper, a compact omnidirectional dual-polarization high-isolation slot antenna working in the WLAN2.4GHz band is first designed. The antenna is designed by opening two orthogonal slots on the metal floor. The omnidirectional radiation of the antenna is realized in two polarization states. The gain of the antenna is greater than 1.35dBi. the isolation degree of the antenna is higher than 35dB, and its size is only 0.4880 脳 0.0810 脳 0.0810.The second, for the low profile wireless communication system, In this paper, a low-profile omnidirectional dual-polarization antenna working in the WLAN2.4GHz band is designed, which combines two perpendicular omnidirectional antennas. The gain of the antenna is greater than 0.44dBi. the isolation degree of the antenna is higher than 23.9dB. the overall size of the antenna is only 0.630 脳 0.630 脳 0.0570.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN821.1

【共引文献】