Selective Radio Frequency Shielding

ABSTRACT: In modern battlefields, Electronic Warfare (EW) plays dominating role. To win the battlefield, it is a must to win EW first. In fighting the EW, it is vital to possess the most advanced radio frequency-selective shielding technologies to effectively protect electronic equipment, electronic communications and data storage systems on which the C4I system is established, while the microwave bands of data communications, which are the life-support lines in battlefields, must be kept opened only for friends with absolutely no interrupt anytime. IPITEK proposes to develop a DNA-based, all-dielectric, pattern-less, multilayer-periodic structures (MPS) for frequency selective shielding. The MPS consist of only a pair of two films, with slightly different permittivity and permeability, which is periodically overlapped each other forming a multilayer structure. The proposed MPS feature multiple, very narrow pass-bands, allowing users quickly switch transmission frequency from one to another, while blocking any unwanted frequencies. Phase I work will prove the feasibility of the proposed MPS for selective frequency shielding by refining modeling, selecting materials, testing dielectric properties of selected materials, fabricating demo samples and preliminarily measuring the RF shielding efficiencies of the samples. Phase II will ultimately produce prototypes of proposed MPS. BENEFIT: The novel DNA-based MPS could significantly impact capability for anti-Electronic Warfare defense, as well as numerous commercial needs for EMI-suppression in broadband and high-speed electronics industries. The military and civilian applications include high power antennas, radomes, filters, polarizers, stealth techniques, diplexers, dichroic sub-reflectors and reflection array lenses, Radio Frequency Identification (RFID), radar cross section (RCS) argumentations and EM interference (EMI) protections, and etc. It could have a huge potential market impact.