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An electrically tunable microstrip phase shifter for applications of phased array antennas is designed based on nematic liquid crystal material. The experimental results show a tunable differential phase shift up to 270 at 10 GHz, and the insertion loss is less than 9 dB at 1–10 GHz range. By optimizing both of the liquid crystal tuning efficiency and overall loss, an average figure-of-merit (FoM)...
In order to find out more suitable water for Vi o la tricolor irrigation, the effect of three water source with different salinity on growth, photosynthesis, and chlorophyll content in two cultivars of Viola tricolor were investigated. The results show that the underground water in Xinxiang (EC=2.98 ms/cm) decrease the seedling germination percent in both cultivars, while significantly in ‘229.05’,...
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