The article highlights a promising direction for high-speed signal transmission in wireless optical communication systems, namely, the use of optical antennas. Unlike fiber-optic systems which are sufficiently advanced today, today only one patent and one work are performed to describe the optical antenna array, which describes the optical antenna array for transmitting the optical signal in telecommunication networks. An important task in creating the antenna is selecting intelligent material to control the radiation pattern. The main physical foundations of optical antenna array have been described. The antenna array is based on the mirror system and lens system. To provide the necessary phase shift, two kinds of structures are proposed: of lithium niobate and of ferrite-garnet. The main analytical expressions describing system behavior are found for the first time.
This paper presents a circular polarization plane antenna using linearly truncated triplate stripline resonator antenna. Glass-epoxy substrate is used in place of Teflon substrate for low cost fabrication. In spite the electrical dimension differs only √2 (root two), the dimensions of circular disk, its truncation, and feeding lines must be chosen precisely and accurately to get better characteristics of gain 12 dB compared to 10 dB by elliptic resonator with 4-antenna array.
Angular-dependent photodetection enhancement by a metallic circular disk optical antenna