This paper presents the design and development of a multiband filter using folded substrate integrated waveguide (FSIW) for the Wi-Fi 6E application. The emerging network standard IEEE802.11ax also known as Wi-Fi 6E is the next generation of Wi-Fi, which includes an additional frequency band at 6 GHz and provides improvements over 802.11ac (Wi-Fi 5). The designed filter is based on modification of the impedance of the FSIW structure introducing longitudinal as well as transverse slots. The equivalent circuit of the slot loaded structure is derived and simulated results using ADS are compared with the simulated results of the structure using HFSS as well as with the measured results. The measured results and simulated results using HFSS and ADS show the good agreement. The size of the designed structure is 0.31λ_g × 0.15λ_g and shows insertion loss less than 0.8 dB over the desired frequency bands.

本文介绍了针对Wi-Fi 6E应用的使用折叠基板集成波导（FSIW）的多频带滤波器的设计和开发。下一代Wi-Fi是新兴的网络标准IEEE802.11ax，也称为Wi-Fi 6E，它包括6 GHz的附加频带，并提供了对802.11ac（Wi-Fi 5）的改进。设计的滤波器基于FSIW结构阻抗的修改，引入了纵向和横向缝隙。推导了缝隙加载结构的等效电路，并将使用ADS的仿真结果与使用HFSS的结构的仿真结果以及测量结果进行了比较。使用HFSS和ADS的测量结果和模拟结果显示出良好的一致性。所设计的结构的大小是0.31 λ_克 ×0.15 λ_克和节目的插入损耗在所需频带小于0.8分贝。