A ferromagnetic loaded device for controllable orthogonal mode rejection at millimeter-Wave is presented in this brief. The device is based on dual image dielectric guide (DIDG) capable of supporting both vertical (V-mode) and horizontal (H-mode) polarization. Two ferrite pillboxes are placed vertically (axis parallel to V-mode) and horizontally (axis parallel to H-mode) beside and above the DIDG, receptively. These pillboxes act as whispering gallery mode resonators interacting with the mode parallel to their axis depending on the applied magnetic DC bias, resulting in controllable mode rejection beneficial in smart antenna systems. Despite traditional magnetically tunable ferrite based components, the proposed design is mostly based on the direction of the magnetic bias requiring a small magnetic bias of 1 mT. An aperture coupling transition from Microstrip line to DIDG is used to perform orthogonal mode decomposition as well as proposing planar circuits excitation and integration. Measured polarization filtering bandwidth provided by each pillbox is 0.4 GHz having insertion loss higher than 10 dB (no transmission) and port isolation of higher than 15 dB. Insertion loss of the case, when the rejection mechanism is off, is around 3 dB.

中文翻译：

---

毫米波频率下智能偏振分集的可控正交模式抑制

本简介中介绍了一种铁磁负载设备，用于在毫米波进行可控正交模式抑制。该器件基于能够支持垂直（V 模式）和水平（H 模式）极化的双图像介质波导 (DIDG)。两个铁氧体药盒垂直（轴平行于 V 模式）和水平（轴平行于 H 模式）放置在 DIDG 旁边和上方，以接收。这些药丸盒充当回音壁模式谐振器，根据施加的磁直流偏置与平行于其轴的模式相互作用，从而实现对智能天线系统有益的可控模式抑制。尽管采用传统的基于磁性可调谐铁氧体的组件，但所提议的设计主要基于需要 1 mT 小磁偏的磁偏方向。从微带线到 DIDG 的孔径耦合过渡用于执行正交模式分解以及提出平面电路激励和集成。测得的每个 Pillbox 提供的偏振滤波带宽为 0.4 GHz，插入损耗高于 10 dB（无传输），端口隔离度高于 15 dB。当拒绝机制关闭时，外壳的插入损耗约为 3 dB。