Abstract: The present disclosure provides a phase shifter, a driving method for the phase shifter, and an antenna system, and belongs to the field of communication technologies. The present disclosure provides a phase shifter, including: a control module, a digital-to-analog conversion module and a phase shift structure; the control module is configured to generate a plurality of correction signals according to phase shift degrees of the phase shift structure; the digital-to-analog conversion module is configured to generate a driving signal according to the correction signals; and the phase shift structure is configured to shift a phase of a microwave signal passing therethrough according to the driving signal.

Abstract: The present disclosure discloses a method for synthesizing quinolones intermediates by a continuous flow reaction. Specifically, according to the method, a microchannel reactor is used, which improves the selectivity and conversion rate of the reaction, and the conversion rate of compound ii is increased to more than 95% and the yield is increased to more than 85%; avoids the use of a solvent such as methanol, and methyl tert-butyl ether, etc., in the intermittent reaction process, which simplifies the post-processing method, shortens the overall operation time from about 24 hours to a few minutes, greatly improving the production efficiency, and realizing the continuity and automation of the whole process; and thus makes the product have high purity and high yield, which is suitable for industrial production.