小型化T隔板多层基片集成波导滤波器设计

Compact Multiplayer Filter with T-Septum Substrate Integrated Waveguide

基于LTCC工艺设计并制作了一种多层T隔板基片集成波导（TSSIW）滤波器。该滤波器以TSSIW谐振腔为基础,利用其灵活的同层与异层的耦合方式实现四阶交叉耦合结构,并节省60%以上的电路面积。实验结果显示滤波器中心频率为9.4 GHz,工作带宽为500 MHz,通带最小插入损耗小于2.5 d B,回波损耗优于15 d B,表明该滤波器具有体积小、易于集成的特点,同时保持了TSSIW优秀的频率选择性和寄生响应。

A miniaturized T-septum substrate integrated waveguide（ TSSIW） filter is designed and fabricated based on the LTCC technology. The proposed TSSIW filter uses the fourth-order cross-coupled scheme,which can obtain flexible coupling manners in common and vertical layers with more than 60% reduction. The experimental results show that the center frequency of the filter is 9.4 GHz,the working bandwidth is 500 MHz,the minimum insertion loss is less than 2.5 d B,as well as the return loss is better than 15 d B. This proposed filter exhibits not only the advantages of small size and easy integration,but also excellent frequency selectivity and parasitic response of TSSIW.