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In this paper, quasi-optics and its application in millimeter waves and THz bands are introduced. Firstly, a quasi-optical monopulse antennas are illuminated, one is combination of lenses and quasi optical sum difference network; another consists of beam guide and quasi optical sum difference network. The simulations and experimental results are presented. Then, quasi optical beam power combining...
The relation between charge balance and electroluminescent efficiency for polymers is studied systematically in this work. Light-emitting diodes of several kinds of polymers with very different efficiency are compared. The electron and hole currents are measured in the uni-polar devices and fitted by the theoretical model to get carrier mobilities. The universal features of the high efficiency polymers...
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