Ultraviolet rays are constantly affecting human health, especially causing harm to the eyes. Therefore, anti ultraviolet glasses and lenses are of great significance for human health and safety. At present, there are simple and qualitative testing equipment for the UV protection performance of lenses, but their measurement accuracy and traceability have not been verified. Accurate and quantitative UV protection testing requires the use of high-precision grating spectrometers, making it impossible to conduct on-site testing. Therefore, this article presents a portable anti-UV detection system for eyeglass lens, integrating electronic components such as UV light sources, UV sensors, micro-controllers, and display screen. Experimental verification has shown that the system can meet the testing requirements of various lenses in the market.
In this paper, a filtering antenna array based on substrate integrated waveguide technology is designed. The antenna works in the Sub 6G band of 5G, and the array effect is formed by etching slots on the upper surface of the cavity at specific locations to excite the patch, while the filtering effect is generated because of the SIW cavity and patch coupling, forming a high gain filtering antenna. Simulation results show that the filter antenna has 3% bandwidth, peak gain greater than 10dBi in the operating band, and front-to-back ratio greater than 20dB.
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