In this paper a novel feeding technique is presented using transition between microstrip-line segment and folded substrate integrated waveguide (FSIW), which provides very low insertion loss over wide frequency band and can be used for signal feeding in FSIW based waveguides and components. Concept of simultaneous transformation in mode and impedance by tapering central metal septum and removing upper ground plane precisely above the tapering over the transition section is used to design the novel transitions. The presented design procedures are applied on transitions for FSIW transmission lines operating in different frequency bands from C to K band. The concept is explained in detail with an example for transitions designed for FSIW operating in Ku band. All the designed structures are simulated using HFSS software. The designed FSIW with the transitions operating in Ku band is fabricated and the measured results are compared with simulated results and are found in good agreement. Dimensions of transitions designed for FSIWs operating in other frequency bands are tabulated.

在本文中，提出了一种使用微带线段和折叠衬底集成波导 (FSIW) 之间的过渡的新型馈电技术，该技术在宽频带内提供非常低的插入损耗，可用于基于 FSIW 的波导和组件的信号馈送。通过使中心金属隔膜逐渐变细并在过渡部分上的逐渐变细上方移除上接地平面来同时转换模式和阻抗的概念被用于设计新颖的过渡。所提出的设计程序适用于在从 C 到 K 频带的不同频带中运行的 FSIW 传输线的过渡。通过为在 Ku 频段运行的 FSIW 设计的转换示例，详细解释了该概念。所有设计的结构均使用 HFSS 软件进行模拟。设计的 FSIW 在 Ku 波段工作，并将测量结果与模拟结果进行比较，发现它们具有良好的一致性。为在其他频段工作的 FSIW 设计的过渡尺寸已制成表格。