Purcell效应提高辐射效率的微波演示
Microwave Demonstration of Purcell Effect Enhanced Radiation Efficiency
摘要：
我们通过实验证明了一种基于Purcell效应的设计技术，用于改善阻抗匹配，从而提高了小型微波发射器的辐射效率。使用一个迭代的过程集中在比较的相位的辐射场的发射器在空气中的发射器在介电环境中，我们优化了一个小单极微波发射器周围的接地平面上方的电介质半球的结构，以最大限度地提高其辐射效率。优化后的系统在2.00 GHz和2.84 GHz的发射器和两个全向辐射模式之间显示出非常强的耦合，分别产生8360和430倍的Purcell增强因子，以及接近完美的辐射效率。
英文摘要：
We experimentally demonstrate a Purcell effect-based design technique for improved impedance matching, and thus enhanced radiation efficiency from a small microwave emitter. Using an iterative process centred on comparing the phase of the radiated field of the emitter in air with that of the emitter in a dielectric environment, we optimise the structure of a dielectric hemisphere above a ground plane surrounding a small monopolar microwave emitter in order to maximise its radiation efficiency. The optimised system shows very strong coupling between the emitter and two omnidirectional radiation modes at 2.00 GHz and 2.84 GHz, yielding Purcell enhancement factors of 8360 and 430 times increase respectively, and near perfect radiation efficiency.
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