On-Demand Band-Rejected Wideband Antenna Based on Peelable Resonator Membrane

In this letter, we present a wideband planar antenna with on-demand band-rejected characteristics based on the peelable double electric-LC (DELC) resonator membranes. By applying microfabrication techniques, the subwavelength DELC structure is completely encapsulated in a transparent and flexible thin film with a total thickness of 10  $\mu$ m. Resonators with four different widths (4.0, 3.6, 3.2, 2.8 mm) are packaged as a solution kit, providing the rejection bands of 4.24–5.11, 4.61–5.38, 4.85–5.48, and 5.20–5.70 GHz, respectively. Owing to the passive and detachable features of this functional sticker, no biasing network is needed for the rejection band's on / off transition and the membrane could tolerate 1 mm horizontal mismatch and 10 $^\circ$ rotational mismatch during assembly. This work provides a comprehensive solution for the design, manufacture, and implementation of a bias-free wideband antenna with on-demand rejection band and motivates the development of an effective and compact anti-interference system.