本小组程钰间，黄秋栋等人所撰写的名为Narrowband Substrate Integrated Waveguide Isolators的论文被 IEEE Microw. Wireless Compon. Lett. 录用，将于2014年9月正式发表。该论文提出了两种平面铁氧体隔离器结构，成本低廉，结构紧凑。

Abstract—In this paper, two types of X-band ferrite-loaded isolators are proposed based on the substrate integrated wave-guide (SIW) technology. First, a full-height E-plane ferrite slab is used to construct low-loss and high-isolation SIW isolators. The insertion loss is less than 2.2 dB and the isolation coefficient is larger than 30 dB within 400 MHz bandwidth. Then, a surface ferrite-loaded isolator is developed to simplify machining process. The ferrite slabs are mounted on the top and bottom surfaces of the SIW, but not inserted into rectangular holes within the SIW. The insertion loss is less than 3.2 dB ranging from 9.79 to 10.4 GHz. Both the return loss and isolation coefficient are better than 20 dB over the same frequency range.

Index Terms—Substrate integrated waveguide (SIW), isolator, ferrite-loaded.