Devices consisting of both curved mirrors and conventional lenses systems are known as catadioptrics. Catadiopotrics can shorten the overall optical path length and therefore are popular in telescopes and telescopic camera lenses. This invention aims to develop catadioptric systems capable of genera.....
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Some handheld electronic devices that require a directional pattern are equipped with directional printed antennas, along with a large ground plane. However, such an arrangement is cumbersome and expensive for small devices. The drawback inspires the invention of this novel unidirectional antenna fo.....
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