Porous Low‐Loss Silica–PMMA Dielectric Nanocomposite for High‐Frequency Bullet Lens Applications

Several devices of the future generation wireless telecommunication technologies that use bands in THz frequencies for data transmission need low-loss and low-permittivity materials to enable ideal conditions propagation electromagnetic waves. Herein, a lightweight dielectric bullet-shaped lens operating frequency range 110–170 GHz is demonstrated collimate waves, thus increasing intensity electric field. The material based on composite silica nanoshells poly(methylmethacrylate) made by impregnation with polymer followed hot pressing mold. As acts only as an adhesive between hollow nanospheres without filling inner cavity shells their interparticle spaces, highly porous (67%) has low permittivity loss tangent (1.5 4 × 10−3, respectively, below 200 GHz). size collimated beam increase corresponding field strength are measured vary from 2.2 1.2 mm 17.2 8.98 dB depending waves (110–170