Simultaneous optimization of conductive layer, dielectric layer, and fabrication process for optically transparent low-loss frequency selective surfaces.

This work presents a design approach for optically transparent low-loss frequency selective surfaces (FSSs) based on the simultaneous optimization of a conductive layer, dielectric layer, and fabrication process. Three bandpass FSSs working in millimeter-wave bands with low insertion losses are investigated and fabricated based on low-loss Rogers RT5870 and cyclic olefin copolymer (COC) substrates. The measured results of the RT5870 based FSS (case 1) and COC based FSS (case 2) indicate that the COC substrate possesses lower dielectric loss tangent at the K band.

Sn Whiskers from TiSnC Max Phase: Bridging Dual-Functionality in Electromagnetic Attenuation.

In the ever-evolving landscape of complex electromagnetic (EM) environments, the demand for EM-attenuating materials with multiple functionalities has grown. 1D metals, known for their high conductivity and ability to form networks that facilitate electron migration, stand out as promising candidates for EM attenuation. Presently, they find primary use in electromagnetic interference (EMI) shielding, but achieving a dual-purpose application for EMI shielding and microwave absorption (MA) remains a challenge.

Multifunctional MXene/C Aerogels for Enhanced Microwave Absorption and Thermal Insulation.

Two-dimensional transition metal carbides and nitrides (MXene) have emerged as promising candidates for microwave absorption (MA) materials. However, they also have some drawbacks, such as poor impedance matching, high self-stacking tendency, and high density. To tackle these challenges, MXene nanosheets were incorporated into polyacrylonitrile (PAN) nanofibers and subsequently assembled into a three-dimensional (3D) network structure through PAN carbonization, yielding MXene/C aerogels.

Low-loss and flexible terahertz bandpass frequency selective surface based on cyclic olefin copolymer substrate via solvent-free synthesis.

This study investigates a low-loss and flexible terahertz frequency selective surface (FSS) based on cyclic olefin copolymer (COC) film substrate, which is fabricated via a simple temperature-control method without the use of solvent. The measured frequency response of the proof-of-concept COC-based THz bandpass FSS matches well with the numerical results. Due to the ultra-low COC dielectric dissipation factor (order of 0.

Comparison of Metallization Schemes on Glass Dielectrics for X-Band Glass Antennas and Energy Harvesting.

We prepare and test four types of glass antennas for X-band applications and energy harvesting. These antennas are made of three different glass metallization schemes, including conductive copper foil (CCF), conductive silver paste (CSP) and indium tin oxide (ITO) thin film. Compared with conventional microstrip patch antennas, the dielectric substrate materials of these designs are replaced with silicon-boron glass ( = 6, tangent δ = 0.