A helix antenna was presented together with low power RF amplifier, as the frequency fitted, the axial direction can obtain largest radio energy.

采用小尺寸低功耗的射频芯片结合实际环境设计出螺旋结构天线，选择合适的频率，天线在轴向方向得到最大的辐射能量。

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The second is the measurement of arrival direction for radio signals, which is to monitor the spatial distribution of radio energy, which is often called spatial spectrum estimation.

第二是对无线电信号来波方向的测量，即是要对无线电信号能量在空间的分布进行监测，这就是所谓的空间谱估计技术。

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The process is not entirely efficient, and there is a byproduct: an enormous amount of energy — radio waves, X-rays and regular light — hyper-illuminates the whole scene.

整个过程并不是特别有效率，而且还有副产品：一个庞大的能量团——无线电波，X射线和常规的光——高度照亮着整个区域。

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Then they use radio frequency energy to heat the tissue around the catheter.

VOA: special.2010.03.02

If a tiny demon, equipped with a radio transmitter, could peer at each nucleus individually, he could choose to flip it only if it were already down, thereby causing it to spit out some radio energy.

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"We have explored various methods, ranging from radio frequency energy harvesting to solar power, " he told BBC News.

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An ablation sends radio frequency energy into the part of the heart that is causing the irregular heartbeat and kills the cells that cause the problem.

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