Compact Filtenna for WLAN Applications

Abstract This manuscript proposes a Filtenna operating in the frequency range of 5.15-5.35 GHz for possible application in wireless local area network (WLAN). Initially, a monopole antenna consisting of a square loop radiating patch is designed at 5.2 GHz and is integrated into a bandpass filter (BPF) with centre frequency of 5.2 GHz. Within the proposed frequency band of operation, the filtenna exhibits omni-directional radiation pattern, good selectivity and low reflection loss. Also, the VSWR observed is less than 2 and peak antenna gain is approximately 2.5 dBi within the frequency range. A consistency is obtained between the simulation and the experiment.

摘要 本文提出一款工作于5.15~5.35 GHz频段的滤波天线（Filtenna），可应用于无线局域网（WLAN）场景。首先，设计了一款工作于5.2 GHz的方形环辐射贴片单极天线，并将其与中心频率为5.2 GHz的带通滤波器（BPF）集成。在所提出的工作频段内，该滤波天线展现出全向辐射方向图、优异的选频特性与较低的反射损耗。此外，其电压驻波比（VSWR）小于2，工作频段内天线峰值增益约为2.5 dBi。仿真结果与实验结果具有良好的一致性。