An Overview of Printed Microstrip Antennas in Eyewear Applications
This article reviews some of the smart antennas used in Eyewear, which can receive frequencies of 700-960 MHz and 2.7-1.7 GHz, as well as Wi-Fi 5G (5.18-5.85 GHz) and Wi-Fi 6e (5.925 -7.125 GHz) to be used in wireless Eyewear glasses. Since the antennas of Eyewear devices that work in 4G, 5G cellular communication standard and Wi-Fi 6 internal wireless communication is a new category, first a general study for antenna bandwidth in different locations is done. Given that, these antennas are designed as mutual elements (coupled) and are mostly placed on FR4 or polycarbonate substrate. Then the MIMO antennas used in these glasses are investigated and gain, efficiency and SAR studies are performed along with different modes. In order to obtain a good adaptation to the use cases, the human head is always considered in the simulations. After that, antenna designs with suitable dielectric cover and frame are suggested.
Smart Glasses , Eyewear , MIMO , SAR , Coupling
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