In general, a linearly polarized wave can be changed into an elliptically or circularly polarized wave by using a wave polarizer. However, adding an external polarizer will increase the size and complexity of the antenna. In this patent, a polarizer is directly integrated with the omnidirectional LP.....
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The rapid growth of telecommunication gives rise to an ever-increasing demand for patch antennas with wide impedance bandwidth. The patch antenna invented by CityU is equipped with a pair of folded feed plates that serve as a wideband impedance matching device. It can achieve an impedance bandwidth .....
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This technology is a dynamic output compensator that can significantly improve the dynamic response of voltage regulators. The key advantage of the compensation method is that it is not necessary to redesign the power conversion stage and controller existing in voltage regulators. It only requires .....
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Surfaces with extreme liquid-repellency is critical to the functionality and robustness of many commercial and industrial applications including weather-resistant machines and apparel, non-stick and anti-fouling surfaces for consumer products and life sciences equipment, and moisture-repellent surfa.....
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This invention aims at enhancing and widening the spatial effect of stereo audio system. Traditional ways of enhancing the spatial effect of a stereo audio system may sound mechanical, and could be affected by external factors such as the auditory characteristics of the listeners. Our method conceal.....
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