Low-Profile Wideband <i>D</i>-Band Absorber Utilizing Resistive Thin-Film Screen-Printing
Youngno Youn, Ahmed Abdelmottaleb Omar, Daehyeon Kim, Suho Chang, Wonbin Hong
Abstract
A low-profile and wideband sub-THz absorber utilizing a thin resistive ruthenium oxide (RuO2) printing technique is proposed in this letter. The proposed absorber exhibits an absorption bandwidth from 108.2 to 171.1 GHz, which represents 45.04% with a profile of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.076~\lambda _{\mathrm {max}}$ </tex-math></inline-formula> which is the free-space wavelength at the lowest frequency. The detailed manufacturing steps are presented along with step-by-step photographs of the fabricated sample. The fabricated prototype is validated by the free space measurement setup with good coherence to the simulated results. This invention is expected to provide a practical and concise solution for mitigating electromagnetic interference (EMI) in future sixth-generation (6G) devices.