The invention relates to a patch antenna with a very wide bandwidth, and which is specially designed for mobile vehicle communication. The antenna is made up of a power feeder and a folding component. With a bandwidth covering 1.78 GHz to 3.6 GHz, the antenna can support 2G, 3G, wireless LAN, Blueto.....
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Synchronous rectification is applied in switched mode circuits for reducing conduction losses in low-voltage and high-current applications. The self-driven AC-DC synchronous rectification technique developed by CityU can be used to fabricate an AC-DC synchronous rectifier that behaves like a diode b.....
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Existing methods for multi-string applications require many windings in the isolation transformers because each converter output needs one winding. This invention, a dimmable LED driver, can reduce the number of windings. It also possesses a two-secondary-winding structure to generate several source.....
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The invention is a new photocatalyst used for the degradation of organic pollutants such as BPA, Orange G, calmagite and methylene blue in waste water.
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此項發明涉及專為射頻識別系統主動式標籤而設的微型折合式偶極子天線，並可與毫 .....
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