应用于移动终端设备的天线设计

发布时间：2018-01-11 02:12

本文关键词：应用于移动终端设备的天线设计　出处：《杭州电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着移动通信技术尤其是无线通信技术的迅猛发展，各种各样的终端设备应运而生。天线作为移动终端设备的重要组成部分，其特性直接决定着整个通信链路系统的性能优劣。目前，卫星导航在民用领域市场不断拓展，特别是伴随着移动互联网的快速发展和智能手机的普及为卫星定位服务的爆发奠定了坚实的基础。由于圆极化天线具有接收效率高、抗干扰性能强以及抗多径反射等突出优势，因此近年来针对卫星导航终端天线的研究主要聚焦于具备多频段、圆极化和宽频段的终端天线。分形天线是由迭代产生的，由于其自相似性，使得天线在多频段工作变得更加容易实现；由于其空间填充性，使得天线尺寸能够进一步缩减。将分形天线的特性应用于微带天线的设计中，必然会极大地改善天线的性能。因此，对于分形天线的研究和应用，必然有着非常广阔的前景。论文的主要工作如下：（1）首先详细介绍了微带天线的基本理论和分析方法，然后讨论了微带天线的圆极化实现和馈电方法，阐述了应用于卫星导航系统等移动终端的圆极化天线的主要性能要求。（2）其次针对卫星导航天线的需求，设计了一款应用于卫星导航系统等移动终端的双频段宽带圆极化缝隙天线，工作在北斗导航卫星系统的B1/S频段，应用电磁仿真软件HFSS对其进行优化仿真，并在此基础上制作了实物，测量结果和仿真结果基本一致。（3）再次分析了Hilbert分形天线在手机通信领域的应用，接着对一款小型化Hilbert分形多频段PIFA天线在结构设计上采用三种方案进行了性能优化。（4）最后将分形技术应用到微带天线设计中，设计一种工作在GSM900、DCS1800以及ISM WLAN2.5GHz三个频段的终端天线，，其中在2.492GHz谐振频段内实现了圆极化，可作为“北斗”的接收天线，应用电磁仿真软件HFSS进行仿真优化，仿真结果达到指标要求。
[Abstract]:With the rapid development of mobile communication technology, especially wireless communication technology, a variety of terminal equipment came into being. Antenna as an important part of mobile terminal equipment. Its characteristics directly determine the performance of the whole communication link system. At present, satellite navigation in the civilian market continues to expand. Especially with the rapid development of mobile Internet and the popularity of smart phones, it has laid a solid foundation for the explosion of satellite positioning services. Because of its strong anti-jamming performance and anti-multipath reflection, the research on satellite navigation terminal antenna is focused on multi-frequency band in recent years. The fractal antenna is generated by iteration, because of its self-similarity, it is easier to realize the antenna in multi-frequency band. Because of its space filling, the antenna size can be further reduced. The application of fractal antenna to the design of microstrip antenna will improve the antenna performance greatly. For the research and application of fractal antenna, it must have a very broad prospect. The main work of the thesis is as follows: Firstly, the basic theory and analysis method of microstrip antenna are introduced in detail, then the circular polarization and feed method of microstrip antenna are discussed. The main performance requirements of circular polarization antenna used in satellite navigation system and other mobile terminals are described. Secondly, aiming at the demand of satellite navigation antenna, a dual-band circularly polarized slot antenna is designed for mobile terminals such as satellite navigation system, which works in the B-1 / S band of Beidou navigation satellite system. The electromagnetic simulation software HFSS is used to optimize the simulation, and on this basis, the physical object is made, and the measurement results are basically consistent with the simulation results. Thirdly, the application of Hilbert fractal antenna in the field of mobile phone communication is analyzed again. Then three schemes are used to optimize the performance of a miniaturized Hilbert fractal multiband PIFA antenna. Finally, the fractal technique is applied to the design of microstrip antenna, and a terminal antenna is designed which works in the three frequency bands of GSM900, DCS1800 and ISM WLAN2.5GHz. The circular polarization is realized in the resonant band of 2.492 GHz, which can be used as the receiving antenna of Beidou. The simulation optimization is carried out by using the electromagnetic simulation software HFSS. The simulation results meet the requirements of the target.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN822

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