Plasma materials offer major advantages over normal materials: plasma can be rapidly built and destroyed in millisecond to microsecond time scales, permit a fast changing of the electrical power and incident frequency with controlled characteristics. We present that plasma antenna can focus and enhance electromagnetic energy. The electromagnetic energy density of focus spot can reach several hundred times larger than that of the incident wave. We have designed two kinds of plasma arrays and found that plasma arrays are far superior to single antennas and have better energy enhancement. The near-field enhancement may provide a new means to focus power onto devices with high efficiency. This research opens up the possibilities for highly effective coupling power into receivers or focusing power into the specified location by plasma antenna.

等离子体材料比普通材料具有主要优势：等离子体可以在毫秒到微秒的时间范围内快速构建和销毁，允许以受控特性快速改变电功率和入射频率。我们提出等离子天线可以聚焦并增强电磁能。焦点的电磁能量密度可以达到入射波的数百倍。我们设计了两种等离子体阵列，发现等离子体阵列远远优于单天线，并且具有更好的能量增强。近场增强可以提供一种新的方式来将功率高效地集中到设备上。这项研究为通过等离子体天线将功率高效耦合到接收器或将功率聚焦到指定位置开辟了可能性。