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 μm. 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° 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.