Hung Y.-CCHIEN-HAO LIU2021-08-052021-08-052017https://www.scopus.com/inward/record.uri?eid=2-s2.0-85013157579&partnerID=40&md5=bbc707f9b1823c32c76c58c4f5a70f8fhttps://scholars.lib.ntu.edu.tw/handle/123456789/576124Frequency selective surfaces (FSSs) have been widely used in modern communications and military applications such as radomes and RCS reductions. In some circumstances, their filtering responses need to be tuned from one frequency band to another. For most tuning techniques, it's still a challenging problem for large-area FSSs. Take electronic tuning for example, it requires lots of electronic controllable elements and RF/DC isolations depending on the sizes of the FSS. In this research, we investigate a mechanical tuning approach of using stretching to tune the frequency response of a large-area FSS. Instead of exploiting a complicated bias circuit for individual unit cell, the responses can be shifted by increasing the mechanical loadings added on the edges of the entire frame of the FSS. The proposed FSS in this research was composed of two inductive horseshoe-shaped strips separated by a capacitive gap forming a first-order band-stop filter. The mechanical stretch and the induced tuning of a unit cell are studied separately by finite element method and full-wave EM simulations. A prototype was designed, fabricated, and examined with an X-band waveguide measurement. The research results are expected to be beneficial for high-power-microwave devices and mm-wave applications. ? 2016 IEICE.Finite element method; Frequency bands; Frequency response; Frequency selective surfaces; Microwave devices; Microwaves; Military applications; Military communications; Millimeter wave devices; Millimeter waves; Notch filters; Pulse width modulation; Frequency selective surface (FSSs); High power applications; High power microwave devices; Large area; Mechanical stretch; Mm-wave application; Stretchable; Tunable FSSs; Tuningconference paper2-s2.0-85013157579