Kyocera Corp developed a small antenna whose transmission and reception performances do not lower even on metal, water surface, etc.
The antenna, "Amcenna," was exhibited at Ceatec Japan 2018, which took place from Oct 16 to 19, 2018, at Makuhari Messe, in Chiba City, Chiba Prefecture, Japan.
The exhibited antenna was targeted at 2.4GHz-band electromagnetic waves, but the Amcenna can support various frequencies. In addition, it has a large antenna gain for specific polarized waves. So, with appropriate angles, it becomes possible to closely place antenna devices, which has been difficult.
By exploiting the fact that the antenna can be installed in various locations with a wide range of antenna density, Kyocera plans to apply it to all kinds of IoT devices, MIMO (multi-input, multi-output) devices, healthcare devices and so forth.
'Right-handed' meta-material used
The performance of the Amcenna as an antenna does not lower even on metal, etc because its antenna element is made by using a "meta-material," Kyocera said. A meta-material is an artificial material whose effective dielectric constant (ε') and magnetic permeability (μ') were changed by periodically arranging "unit cells" (a kind of LC circuit).
Speaking of meta-materials, "left-handed meta-materials," which do not exist in nature and whose ε' and μ' values are both negative, are famous. However, the ε' and μ' values of the Amcenna's meta-material are both positive (right-handed).