论文名称为“A W-Band Low-Profile Dual-Polarized Reflectarray With Integrated Feed for In-Band Full-Duplex Application”。该工作基于“正交隔离，差分对消”的隔离度提升手段，在92~95GHz频段设计了具备高端口隔离度的双极化共口径馈源天线阵列，同时又基于双层贴片结构与无极化选择性副反射面，设计了双极化卡塞格伦反射阵。该天线具有低剖面、高隔离度、高增益的特点，反射阵焦径比（F/D）降低至0.2，端口隔离度高于55dB、最大增益高于30dB。该天线可用于吉比特固定点对点无线通讯。工作主要完成人郝瑞森、程钰间、吴亚飞。

论文链接：https://ieeexplore.ieee.org/document/9534711

Abstract—A W-band low-profile dual-polarized Cassegrain reflectarray with an integrated feed is designed in this work. High isolation, which is necessary for the in-band full-duplex (IBFD) applications, is realized between two feeding ports corresponding to the orthogonal polarizations. The antenna is composed of two parts, i.e., the dual-polarized planar-array feed and the Cassegrain reflectarray with a small focal-length to diameter ratio ( F/D) . The dual-polarized planar array feed is appressed behind the main-reflectarray, and the F/D is reduced to 0.2 to realize the integration and the low-profile property. For the array feed, high isolation is achieved through the orthogonal-mode isolation and the differential signal cancellation. Its radiation pattern is also manipulated to fit the reflectarray considering the taper and spillover efficiency. For the reflectarray, the rotational symmetry configuration and the dual-layer-patch cell are applied to suit the dual-polarization operation and the large incident angle, respectively. The measured operation band, where the gain variation is within 1 dB, is 93.4–95.6 GHz. At the center frequency, the gains of the Cassegrain reflectarray for the two ports are 31.86 and 30.88 dBi, and the corresponding aperture efficiencies are 31.4% and 25.1%, respectively. The isolation between the two ports is higher than 55 dB within the operation band. This work is a low-profile candidate for W-band point-to-point IBFD communication.

Index Terms—Cassegrain antenna, differential feeding, dual-polarization, full-duplex, high isolation, multi-Gbps communication, reflectarray, shared aperture, W-band.