A novel polarization-independent reconfigurable frequency selective surface (FSS) for RF shielding is proposed in this letter. The FSS is designed on a flexible and transparent polyester film for shielding Wi-Fi frequency. The symmetrical cross dumbbell design of FSS helps in achieving alike bandstop response for both TE and TM modes with wider angular stability up to 60°. A finite prototype containing 15 × 11 elements is fabricated and tested. The FSS provides the measured shielding effectiveness of 32 dB at 5.2 GHz. Additionally, for RF shielding in an indoor wireless environment, Venetian blind inspired shutter mechanism is introduced in the designed FSS array. By rotating the blinds of the array, frequency tuning is achieved.

中文翻译：

---

用于室内无线环境中射频屏蔽的机械可重构频率选择表面

在这封信中提出了一种用于射频屏蔽的新型极化无关可重构频率选择表面 (FSS)。FSS 设计在柔韧透明的聚酯薄膜上，用于屏蔽 Wi-Fi 频率。FSS 的对称交叉哑铃设计有助于为 TE 和 TM 模式实现相似的带阻响应，并具有高达 60° 的更宽的角稳定性。制造并测试了一个包含 15 × 11 个元素的有限原型。FSS 在 5.2 GHz 下提供 32 dB 的测量屏蔽效率。此外，对于室内无线环境中的射频屏蔽，设计的 FSS 阵列中引入了百叶帘启发的快门机制。通过旋转阵列的百叶窗，实现频率调谐。