1应用于 WLAN 的双频段滤波天线的设计内容摘要：本文设计了一款应用于 WLAN 局域网的紧凑双频带滤波天线。该天线主要由两个加载开路枝节的开环谐振器和一个双频带弯曲单极子天线构成。单极子天线不仅作为双频带滤波器的最后一个谐振器还作为辐射器。所设计的天线具有好的频率选择性和带外抑制性能，两个频带还可以相对独立地调节。仿真结果表明设计的滤波天线可以工作在2.45 和 5.2GHz 频段，两个通带的带宽分别为 12.4%和 7.1%，并具有很好的带外抑制性能。关 键 词：带通滤波器 双频天线 滤波天线 无线局域网天线 小型化Abstract ： In this paper a compact dual-band filter antenna is designed for WLAN. The antenna is mainly composed of two open-loop resonators loaded with open branches and a dual-band bent monopole antenna. The monopole antenna acts not only as the last resonator of the dual band filter but also as a radiator. The designed antenna has good frequency selectivity and out-of-band suppression performance, and the two operating bands can be adjusted relatively independently. The simulation results show that the designed filter antenna can work in 2.45 and 5.2 GHz bands, and the bandwidths of the two passbands are 12.4% and 7.1%, respectively, with good out-of-band suppression performance.Key words：band-pass filter, dual-band antenna, filtering antenna, WLAN antenna， miniaturization目录2一、引言............................................................41.1 课题研究背景与意义..........................................41.2 本文主要研究内容............................................4二、滤波器和天线基本设计理论........................................52.1 滤波器相关理论..............................................52.1.1 微波滤波器的概念........................................52.1.2 微波滤波器的相关参数指标................................52.2 天线相关理论基础............................................52.3 滤波天线设计方法.......................................
