应用于WLAN的滤波天线设计
发布时间：2018-08-31 11:09
【摘要】：随着无线移动技术的迅猛发展,人们对各种设备集成化、小型化和多功能化要求越来越高,这给无线通信系统的发展带来了很大的机遇和挑战,也给研究人员提出了更高的要求。滤波器和天线作为无线通信设备中的重要器件,更加要求向着集成化、多频化方向发展。将天线和滤波器集成设计,不仅能有效降低通信设备的尺寸,而且能提高抗干扰性和通信质量,因此,具有较高的研究价值。WLAN已经成为宽带接入的有效手段之一,使用WLAN的区域及其承载的业务愈来愈多。其中,IEEE802.11b标准的2.4GHz频段(2.40～2.48GHz)和IEEE802.11a标准的5GHz频段(5.15-5.35GHz)是最常用的两个频段,故研究应用于2.4GHz频段和5GHz频段WLAN系统中的滤波天线是十分有意义的。论文主要研究了滤波天线的设计原理与实现方法。在此基础上,设计了三款应用于WLAN通信系统的滤波天线。第一款滤波天线是应用于WLAN 5GHz频段的微带结构的滤波天线,首先根据微带滤波器理论设计了一款WLAN(5.15～5.35GHz)频段的带通滤波器,然后以该滤波器为基础,改变第二阶谐振器,通过和缺陷地结构相结合的方法,实现了滤波天线的功能；第二款滤波天线是应用于WLAN 2.4GHz频段的二元滤波天线阵,其中,滤波天线单元是通过将基片集成波导结构的圆柱腔滤波器与微带贴片天线集成设计而成的,滤波天线阵采用威尔金森功分器进行馈电；第三款滤波天线是同时工作在2.4GHz频段和5GHz频段的双频WLAN滤波天线,该滤波天线通过在“田”字形双频天线的馈线部分加载阶梯阻抗谐振器的方法设计而成。论文采用理论设计与电磁仿真软件仿真相结合的方法进行设计,并根据设计结果对三款滤波天线进行了加工与测试。测试结果表明,论文设计的第一款滤波天线的最大增益为1.85dBi；第二款滤波天线阵的最大增益为5dBi,；第三款双频滤波天线在两个频段的最大增益分别为1.85dBi和2.27dBi,且三款滤波天线带外抑制特性较好,且结构简单、体积小、成本低,基本满足WLAN系统的要求。
[Abstract]:With the rapid development of wireless mobile technology, people have higher and higher requirements for the integration, miniaturization and multifunction of various devices, which brings great opportunities and challenges to the development of wireless communication system. It also puts higher demands on researchers. As an important device in wireless communication equipment, filters and antennas need to be integrated and multi-frequency. The integrated design of antenna and filter can not only effectively reduce the size of communication equipment, but also improve the anti-interference and communication quality. Therefore, WLAN has become one of the effective means of broadband access. There are more and more areas using WLAN and its service. The 2.4GHz band (2.40~2.48GHz) of IEEE 802.11b standard and the 5GHz band (5.15-5.35GHz) of IEEE802.11a standard are the two most commonly used bands, so it is very meaningful to study the filter antenna applied in 2.4GHz band and 5GHz band WLAN system. This paper mainly studies the design principle and realization method of filter antenna. On this basis, three filter antennas used in WLAN communication system are designed. The first filter antenna is a microstrip filter antenna used in WLAN 5GHz band. Firstly, a band pass filter in WLAN (5.15~5.35GHz) band is designed according to the theory of microstrip filter, and then the second order resonator is changed based on the filter. The function of the filter antenna is realized by combining with the defective ground structure. The second filter antenna is a binary filter antenna used in the WLAN 2.4GHz band, in which, The filter antenna unit is designed by integrating the cylindrical cavity filter with the microstrip patch antenna. The filter antenna array is fed by Wilkinson power divider. The third filter antenna is a dual-frequency WLAN filter antenna which works in both 2.4GHz band and 5GHz band. The filter antenna is designed by loading step impedance resonator into the feeder of "Tian" zigzag double frequency antenna. The paper adopts the method of combining the theory design and electromagnetic simulation software to design, and according to the design results, the three filter antennas are machined and tested. The test results show that the maximum gain of the first filter antenna is 1.85 dBi.The second filter antenna has a maximum gain of 5 dBig. The maximum gain of the third dual-frequency filter antenna is 1.85dBi and 2.27dBi. the outband suppression characteristics of the three filter antennas are good, and the structure is simple, the volume is small and the cost is low, which basically meets the requirements of the WLAN system.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN925.93;TN820
本文编号：2214798
[Abstract]:With the rapid development of wireless mobile technology, people have higher and higher requirements for the integration, miniaturization and multifunction of various devices, which brings great opportunities and challenges to the development of wireless communication system. It also puts higher demands on researchers. As an important device in wireless communication equipment, filters and antennas need to be integrated and multi-frequency. The integrated design of antenna and filter can not only effectively reduce the size of communication equipment, but also improve the anti-interference and communication quality. Therefore, WLAN has become one of the effective means of broadband access. There are more and more areas using WLAN and its service. The 2.4GHz band (2.40~2.48GHz) of IEEE 802.11b standard and the 5GHz band (5.15-5.35GHz) of IEEE802.11a standard are the two most commonly used bands, so it is very meaningful to study the filter antenna applied in 2.4GHz band and 5GHz band WLAN system. This paper mainly studies the design principle and realization method of filter antenna. On this basis, three filter antennas used in WLAN communication system are designed. The first filter antenna is a microstrip filter antenna used in WLAN 5GHz band. Firstly, a band pass filter in WLAN (5.15~5.35GHz) band is designed according to the theory of microstrip filter, and then the second order resonator is changed based on the filter. The function of the filter antenna is realized by combining with the defective ground structure. The second filter antenna is a binary filter antenna used in the WLAN 2.4GHz band, in which, The filter antenna unit is designed by integrating the cylindrical cavity filter with the microstrip patch antenna. The filter antenna array is fed by Wilkinson power divider. The third filter antenna is a dual-frequency WLAN filter antenna which works in both 2.4GHz band and 5GHz band. The filter antenna is designed by loading step impedance resonator into the feeder of "Tian" zigzag double frequency antenna. The paper adopts the method of combining the theory design and electromagnetic simulation software to design, and according to the design results, the three filter antennas are machined and tested. The test results show that the maximum gain of the first filter antenna is 1.85 dBi.The second filter antenna has a maximum gain of 5 dBig. The maximum gain of the third dual-frequency filter antenna is 1.85dBi and 2.27dBi. the outband suppression characteristics of the three filter antennas are good, and the structure is simple, the volume is small and the cost is low, which basically meets the requirements of the WLAN system.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN925.93;TN820
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相关期刊论文 前1条
1 余晨;洪伟;周健义;;基片集成波导全向滤波天线多天线阵列[J];电波科学学报;2012年02期
相关硕士学位论文 前1条
1 魏巍;宽带频率源小型化及一体化封装研究[D];电子科技大学;2012年
，本文编号：2214798
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